[PATCH rtems-libbsd v2 06/14] regulator: Import from FreeBSD.
Jan.Sommer at dlr.de
Jan.Sommer at dlr.de
Fri Apr 17 08:11:11 UTC 2020
Hi Christian,
Yes, with this patch my build works again.
Thank you very much.
Best regards,
Jan
> -----Ursprüngliche Nachricht-----
> Von: Christian Mauderer [mailto:christian.mauderer at embedded-brains.de]
> Gesendet: Freitag, 17. April 2020 09:17
> An: Sommer, Jan; devel at rtems.org
> Betreff: Re: [PATCH rtems-libbsd v2 06/14] regulator: Import from FreeBSD.
>
> Hello Jan,
>
> can you please try this patch:
>
> https://lists.rtems.org/pipermail/devel/2020-April/059419.html
>
> I've still seen quite some linker errors in if_em.c. But as far as I can
> tell they doesn't seem to be related. Are they?
>
> Best regards
>
> Christian
>
> On 17/04/2020 08:17, Christian Mauderer wrote:
> > Hello Jan,
> >
> > On 16/04/2020 22:27, Jan.Sommer at dlr.de wrote:
> >> I have a question:
> >> I just rebased my working tree for the i386 target to the current 5-
> freebsd-12 branch.
> >> The compilation now fails in regulator related files.
> >> It seems that I am missing the FDT define and that comments out some
> includes.
> >> Could you tell me what FDT means in this context and do you know where
> I can activate it?
> >
> > FDT is a flattened device tree. That's something that isn't used on
> > i386. So most likely quite some more BSPs will have that problem.
> >
> > It's some code that I took over quite unchanged from FreeBSD. I would
> > have expected that it is used in FreeBSD for a lot of different cases
> > and therefore didn't expect a problem like that. I'll have a look at it.
> >
> > Best regards
> >
> > Christian
> >
> >>
> >> Cheers,
> >>
> >> Jan
> >>
> >>> -----Ursprüngliche Nachricht-----
> >>> Von: devel [mailto:devel-bounces at rtems.org] Im Auftrag von Christian
> >>> Mauderer
> >>> Gesendet: Dienstag, 14. April 2020 16:51
> >>> An: devel at rtems.org
> >>> Betreff: [PATCH rtems-libbsd v2 06/14] regulator: Import from FreeBSD.
> >>>
> >>> Update #3869.
> >>> ---
> >>> freebsd/sys/dev/extres/regulator/regulator.c | 1321
> >>> ++++++++++++++++++++
> >>> freebsd/sys/dev/extres/regulator/regulator.h | 156 +++
> >>> freebsd/sys/dev/extres/regulator/regulator_bus.c | 89 ++
> >>> freebsd/sys/dev/extres/regulator/regulator_fixed.c | 502 ++++++++
> >>> freebsd/sys/dev/extres/regulator/regulator_fixed.h | 44 +
> >>> freebsd/sys/dev/gpio/gpioregulator.c | 350 ++++++
> >>> 6 files changed, 2462 insertions(+)
> >>> create mode 100644 freebsd/sys/dev/extres/regulator/regulator.c
> >>> create mode 100644 freebsd/sys/dev/extres/regulator/regulator.h
> >>> create mode 100644 freebsd/sys/dev/extres/regulator/regulator_bus.c
> >>> create mode 100644
> freebsd/sys/dev/extres/regulator/regulator_fixed.c
> >>> create mode 100644
> freebsd/sys/dev/extres/regulator/regulator_fixed.h
> >>> create mode 100644 freebsd/sys/dev/gpio/gpioregulator.c
> >>>
> >>> diff --git a/freebsd/sys/dev/extres/regulator/regulator.c
> >>> b/freebsd/sys/dev/extres/regulator/regulator.c
> >>> new file mode 100644
> >>> index 00000000..4ad6e94a
> >>> --- /dev/null
> >>> +++ b/freebsd/sys/dev/extres/regulator/regulator.c
> >>> @@ -0,0 +1,1321 @@
> >>> +#include <machine/rtems-bsd-kernel-space.h>
> >>> +
> >>> +/*-
> >>> + * Copyright 2016 Michal Meloun <mmel at FreeBSD.org>
> >>> + * All rights reserved.
> >>> + *
> >>> + * Redistribution and use in source and binary forms, with or without
> >>> + * modification, are permitted provided that the following conditions
> >>> + * are met:
> >>> + * 1. Redistributions of source code must retain the above copyright
> >>> + * notice, this list of conditions and the following disclaimer.
> >>> + * 2. Redistributions in binary form must reproduce the above copyright
> >>> + * notice, this list of conditions and the following disclaimer in the
> >>> + * documentation and/or other materials provided with the
> distribution.
> >>> + *
> >>> + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS
> ``AS
> >>> IS'' AND
> >>> + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
> LIMITED
> >>> TO, THE
> >>> + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
> >>> PARTICULAR PURPOSE
> >>> + * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR
> CONTRIBUTORS
> >>> BE LIABLE
> >>> + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
> >>> CONSEQUENTIAL
> >>> + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
> >>> SUBSTITUTE GOODS
> >>> + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
> >>> INTERRUPTION)
> >>> + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
> >>> CONTRACT, STRICT
> >>> + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
> ARISING
> >>> IN ANY WAY
> >>> + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
> >>> POSSIBILITY OF
> >>> + * SUCH DAMAGE.
> >>> + */
> >>> +
> >>> +#include <sys/cdefs.h>
> >>> +__FBSDID("$FreeBSD$");
> >>> +
> >>> +#include <rtems/bsd/local/opt_platform.h>
> >>> +#include <sys/param.h>
> >>> +#include <sys/conf.h>
> >>> +#include <sys/bus.h>
> >>> +#include <sys/kernel.h>
> >>> +#include <sys/queue.h>
> >>> +#include <sys/kobj.h>
> >>> +#include <sys/malloc.h>
> >>> +#include <sys/mutex.h>
> >>> +#include <sys/limits.h>
> >>> +#include <sys/lock.h>
> >>> +#include <sys/sysctl.h>
> >>> +#include <sys/systm.h>
> >>> +#include <sys/sx.h>
> >>> +
> >>> +#ifdef FDT
> >>> +#include <dev/fdt/fdt_common.h>
> >>> +#include <dev/ofw/ofw_bus.h>
> >>> +#include <dev/ofw/ofw_bus_subr.h>
> >>> +#endif
> >>> +#include <dev/extres/regulator/regulator.h>
> >>> +
> >>> +#include <rtems/bsd/local/regdev_if.h>
> >>> +
> >>> +SYSCTL_NODE(_hw, OID_AUTO, regulator, CTLFLAG_RD, NULL,
> >>> "Regulators");
> >>> +
> >>> +MALLOC_DEFINE(M_REGULATOR, "regulator", "Regulator
> framework");
> >>> +
> >>> +#define DIV_ROUND_UP(n,d) howmany(n, d)
> >>> +
> >>> +/* Forward declarations. */
> >>> +struct regulator;
> >>> +struct regnode;
> >>> +
> >>> +typedef TAILQ_HEAD(regnode_list, regnode) regnode_list_t;
> >>> +typedef TAILQ_HEAD(regulator_list, regulator) regulator_list_t;
> >>> +
> >>> +/* Default regulator methods. */
> >>> +static int regnode_method_init(struct regnode *regnode);
> >>> +static int regnode_method_enable(struct regnode *regnode, bool
> enable,
> >>> + int *udelay);
> >>> +static int regnode_method_status(struct regnode *regnode, int
> *status);
> >>> +static int regnode_method_set_voltage(struct regnode *regnode, int
> >>> min_uvolt,
> >>> + int max_uvolt, int *udelay);
> >>> +static int regnode_method_get_voltage(struct regnode *regnode, int
> >>> *uvolt);
> >>> +static void regulator_constraint(void *dummy);
> >>> +static void regulator_shutdown(void *dummy);
> >>> +
> >>> +/*
> >>> + * Regulator controller methods.
> >>> + */
> >>> +static regnode_method_t regnode_methods[] = {
> >>> + REGNODEMETHOD(regnode_init,
> >>> regnode_method_init),
> >>> + REGNODEMETHOD(regnode_enable,
> >>> regnode_method_enable),
> >>> + REGNODEMETHOD(regnode_status,
> >>> regnode_method_status),
> >>> + REGNODEMETHOD(regnode_set_voltage,
> >>> regnode_method_set_voltage),
> >>> + REGNODEMETHOD(regnode_get_voltage,
> >>> regnode_method_get_voltage),
> >>> + REGNODEMETHOD(regnode_check_voltage,
> >>> regnode_method_check_voltage),
> >>> +
> >>> + REGNODEMETHOD_END
> >>> +};
> >>> +DEFINE_CLASS_0(regnode, regnode_class, regnode_methods, 0);
> >>> +
> >>> +/*
> >>> + * Regulator node - basic element for modelling SOC and bard power
> supply
> >>> + * chains. Its contains producer data.
> >>> + */
> >>> +struct regnode {
> >>> + KOBJ_FIELDS;
> >>> +
> >>> + TAILQ_ENTRY(regnode) reglist_link; /* Global list entry */
> >>> + regulator_list_t consumers_list; /* Consumers list */
> >>> +
> >>> + /* Cache for already resolved names */
> >>> + struct regnode *parent; /* Resolved parent */
> >>> +
> >>> + /* Details of this device. */
> >>> + const char *name; /* Globally unique
> >>> name */
> >>> + const char *parent_name; /* Parent name */
> >>> +
> >>> + device_t pdev; /* Producer device_t */
> >>> + void *softc; /* Producer softc */
> >>> + intptr_t id; /* Per producer unique id */
> >>> +#ifdef FDT
> >>> + phandle_t ofw_node; /* OFW node of regulator */
> >>> +#endif
> >>> + int flags; /* REGULATOR_FLAGS_ */
> >>> + struct sx lock; /* Lock for this regulator */
> >>> + int ref_cnt; /* Reference counter */
> >>> + int enable_cnt; /* Enabled counter */
> >>> +
> >>> + struct regnode_std_param std_param; /* Standard
> >>> parameters */
> >>> +
> >>> + struct sysctl_ctx_list sysctl_ctx;
> >>> +};
> >>> +
> >>> +/*
> >>> + * Per consumer data, information about how a consumer is using a
> >>> regulator
> >>> + * node.
> >>> + * A pointer to this structure is used as a handle in the consumer
> interface.
> >>> + */
> >>> +struct regulator {
> >>> + device_t cdev; /* Consumer device */
> >>> + struct regnode *regnode;
> >>> + TAILQ_ENTRY(regulator) link; /* Consumers list
> >>> entry */
> >>> +
> >>> + int enable_cnt;
> >>> + int min_uvolt; /* Requested uvolt range */
> >>> + int max_uvolt;
> >>> +};
> >>> +
> >>> +/*
> >>> + * Regulator names must be system wide unique.
> >>> + */
> >>> +static regnode_list_t regnode_list =
> >>> TAILQ_HEAD_INITIALIZER(regnode_list);
> >>> +
> >>> +static struct sx regnode_topo_lock;
> >>> +SX_SYSINIT(regulator_topology, ®node_topo_lock, "Regulator
> topology
> >>> lock");
> >>> +
> >>> +#define REG_TOPO_SLOCK() sx_slock(®node_topo_lock)
> >>> +#define REG_TOPO_XLOCK() sx_xlock(®node_topo_lock)
> >>> +#define REG_TOPO_UNLOCK() sx_unlock(®node_topo_lock)
> >>> +#define REG_TOPO_ASSERT() sx_assert(®node_topo_lock,
> >>> SA_LOCKED)
> >>> +#define REG_TOPO_XASSERT() sx_assert(®node_topo_lock,
> >>> SA_XLOCKED)
> >>> +
> >>> +#define REGNODE_SLOCK(_sc) sx_slock(&((_sc)->lock))
> >>> +#define REGNODE_XLOCK(_sc) sx_xlock(&((_sc)->lock))
> >>> +#define REGNODE_UNLOCK(_sc) sx_unlock(&((_sc)->lock))
> >>> +
> >>> +SYSINIT(regulator_constraint, SI_SUB_LAST, SI_ORDER_ANY,
> >>> regulator_constraint,
> >>> + NULL);
> >>> +SYSINIT(regulator_shutdown, SI_SUB_LAST, SI_ORDER_ANY,
> >>> regulator_shutdown,
> >>> + NULL);
> >>> +
> >>> +static void
> >>> +regulator_constraint(void *dummy)
> >>> +{
> >>> + struct regnode *entry;
> >>> + int rv;
> >>> +
> >>> + REG_TOPO_SLOCK();
> >>> + TAILQ_FOREACH(entry, ®node_list, reglist_link) {
> >>> + rv = regnode_set_constraint(entry);
> >>> + if (rv != 0 && bootverbose)
> >>> + printf("regulator: setting constraint on %s failed
> >>> (%d)\n",
> >>> + entry->name, rv);
> >>> + }
> >>> + REG_TOPO_UNLOCK();
> >>> +}
> >>> +
> >>> +/*
> >>> + * Disable unused regulator
> >>> + * We run this function at SI_SUB_LAST which mean that every driver
> that
> >>> needs
> >>> + * regulator should have already enable them.
> >>> + * All the remaining regulators should be those left enabled by the
> >>> bootloader
> >>> + * or enable by default by the PMIC.
> >>> + */
> >>> +static void
> >>> +regulator_shutdown(void *dummy)
> >>> +{
> >>> + struct regnode *entry;
> >>> + int status, ret;
> >>> + int disable = 1;
> >>> +
> >>> + TUNABLE_INT_FETCH("hw.regulator.disable_unused", &disable);
> >>> + if (!disable)
> >>> + return;
> >>> + REG_TOPO_SLOCK();
> >>> +
> >>> + if (bootverbose)
> >>> + printf("regulator: shutting down unused regulators\n");
> >>> + TAILQ_FOREACH(entry, ®node_list, reglist_link) {
> >>> + if (!entry->std_param.always_on) {
> >>> + ret = regnode_status(entry, &status);
> >>> + if (ret == 0 && status ==
> >>> REGULATOR_STATUS_ENABLED) {
> >>> + if (bootverbose)
> >>> + printf("regulator: shutting down %s...
> >>> ",
> >>> + entry->name);
> >>> + ret = regnode_stop(entry, 0);
> >>> + if (bootverbose) {
> >>> + /*
> >>> + * Call out busy in particular, here,
> >>> + * because it's not unexpected to fail
> >>> + * shutdown if the regulator is simply
> >>> + * in-use.
> >>> + */
> >>> + if (ret == EBUSY)
> >>> + printf("busy\n");
> >>> + else if (ret != 0)
> >>> + printf("error (%d)\n", ret);
> >>> + else
> >>> + printf("ok\n");
> >>> + }
> >>> + }
> >>> + }
> >>> + }
> >>> + REG_TOPO_UNLOCK();
> >>> +}
> >>> +
> >>> +/*
> >>> + * sysctl handler
> >>> + */
> >>> +static int
> >>> +regnode_uvolt_sysctl(SYSCTL_HANDLER_ARGS)
> >>> +{
> >>> + struct regnode *regnode = arg1;
> >>> + int rv, uvolt;
> >>> +
> >>> + if (regnode->std_param.min_uvolt == regnode-
> >>>> std_param.max_uvolt) {
> >>> + uvolt = regnode->std_param.min_uvolt;
> >>> + } else {
> >>> + REG_TOPO_SLOCK();
> >>> + if ((rv = regnode_get_voltage(regnode, &uvolt)) != 0) {
> >>> + REG_TOPO_UNLOCK();
> >>> + return (rv);
> >>> + }
> >>> + REG_TOPO_UNLOCK();
> >>> + }
> >>> +
> >>> + return sysctl_handle_int(oidp, &uvolt, sizeof(uvolt), req);
> >>> +}
> >>> +
> >>> +/* ----------------------------------------------------------------------------
> >>> + *
> >>> + * Default regulator methods for base class.
> >>> + *
> >>> + */
> >>> +static int
> >>> +regnode_method_init(struct regnode *regnode)
> >>> +{
> >>> +
> >>> + return (0);
> >>> +}
> >>> +
> >>> +static int
> >>> +regnode_method_enable(struct regnode *regnode, bool enable, int
> >>> *udelay)
> >>> +{
> >>> +
> >>> + if (!enable)
> >>> + return (ENXIO);
> >>> +
> >>> + *udelay = 0;
> >>> + return (0);
> >>> +}
> >>> +
> >>> +static int
> >>> +regnode_method_status(struct regnode *regnode, int *status)
> >>> +{
> >>> + *status = REGULATOR_STATUS_ENABLED;
> >>> + return (0);
> >>> +}
> >>> +
> >>> +static int
> >>> +regnode_method_set_voltage(struct regnode *regnode, int
> min_uvolt, int
> >>> max_uvolt,
> >>> + int *udelay)
> >>> +{
> >>> +
> >>> + if ((min_uvolt > regnode->std_param.max_uvolt) ||
> >>> + (max_uvolt < regnode->std_param.min_uvolt))
> >>> + return (ERANGE);
> >>> + *udelay = 0;
> >>> + return (0);
> >>> +}
> >>> +
> >>> +static int
> >>> +regnode_method_get_voltage(struct regnode *regnode, int *uvolt)
> >>> +{
> >>> +
> >>> + return (regnode->std_param.min_uvolt +
> >>> + (regnode->std_param.max_uvolt - regnode-
> >>>> std_param.min_uvolt) / 2);
> >>> +}
> >>> +
> >>> +int
> >>> +regnode_method_check_voltage(struct regnode *regnode, int uvolt)
> >>> +{
> >>> +
> >>> + if ((uvolt > regnode->std_param.max_uvolt) ||
> >>> + (uvolt < regnode->std_param.min_uvolt))
> >>> + return (ERANGE);
> >>> + return (0);
> >>> +}
> >>> +
> >>> +/* ----------------------------------------------------------------------------
> >>> + *
> >>> + * Internal functions.
> >>> + *
> >>> + */
> >>> +
> >>> +static struct regnode *
> >>> +regnode_find_by_name(const char *name)
> >>> +{
> >>> + struct regnode *entry;
> >>> +
> >>> + REG_TOPO_ASSERT();
> >>> +
> >>> + TAILQ_FOREACH(entry, ®node_list, reglist_link) {
> >>> + if (strcmp(entry->name, name) == 0)
> >>> + return (entry);
> >>> + }
> >>> + return (NULL);
> >>> +}
> >>> +
> >>> +static struct regnode *
> >>> +regnode_find_by_id(device_t dev, intptr_t id)
> >>> +{
> >>> + struct regnode *entry;
> >>> +
> >>> + REG_TOPO_ASSERT();
> >>> +
> >>> + TAILQ_FOREACH(entry, ®node_list, reglist_link) {
> >>> + if ((entry->pdev == dev) && (entry->id == id))
> >>> + return (entry);
> >>> + }
> >>> +
> >>> + return (NULL);
> >>> +}
> >>> +
> >>> +/*
> >>> + * Create and initialize regulator object, but do not register it.
> >>> + */
> >>> +struct regnode *
> >>> +regnode_create(device_t pdev, regnode_class_t regnode_class,
> >>> + struct regnode_init_def *def)
> >>> +{
> >>> + struct regnode *regnode;
> >>> + struct sysctl_oid *regnode_oid;
> >>> +
> >>> + KASSERT(def->name != NULL, ("regulator name is NULL"));
> >>> + KASSERT(def->name[0] != '\0', ("regulator name is empty"));
> >>> +
> >>> + REG_TOPO_SLOCK();
> >>> + if (regnode_find_by_name(def->name) != NULL)
> >>> + panic("Duplicated regulator registration: %s\n", def->name);
> >>> + REG_TOPO_UNLOCK();
> >>> +
> >>> + /* Create object and initialize it. */
> >>> + regnode = malloc(sizeof(struct regnode), M_REGULATOR,
> >>> + M_WAITOK | M_ZERO);
> >>> + kobj_init((kobj_t)regnode, (kobj_class_t)regnode_class);
> >>> + sx_init(®node->lock, "Regulator node lock");
> >>> +
> >>> + /* Allocate softc if required. */
> >>> + if (regnode_class->size > 0) {
> >>> + regnode->softc = malloc(regnode_class->size,
> >>> M_REGULATOR,
> >>> + M_WAITOK | M_ZERO);
> >>> + }
> >>> +
> >>> +
> >>> + /* Copy all strings unless they're flagged as static. */
> >>> + if (def->flags & REGULATOR_FLAGS_STATIC) {
> >>> + regnode->name = def->name;
> >>> + regnode->parent_name = def->parent_name;
> >>> + } else {
> >>> + regnode->name = strdup(def->name, M_REGULATOR);
> >>> + if (def->parent_name != NULL)
> >>> + regnode->parent_name = strdup(def-
> >>>> parent_name,
> >>> + M_REGULATOR);
> >>> + }
> >>> +
> >>> + /* Rest of init. */
> >>> + TAILQ_INIT(®node->consumers_list);
> >>> + regnode->id = def->id;
> >>> + regnode->pdev = pdev;
> >>> + regnode->flags = def->flags;
> >>> + regnode->parent = NULL;
> >>> + regnode->std_param = def->std_param;
> >>> +#ifdef FDT
> >>> + regnode->ofw_node = def->ofw_node;
> >>> +#endif
> >>> +
> >>> + sysctl_ctx_init(®node->sysctl_ctx);
> >>> + regnode_oid = SYSCTL_ADD_NODE(®node->sysctl_ctx,
> >>> + SYSCTL_STATIC_CHILDREN(_hw_regulator),
> >>> + OID_AUTO, regnode->name,
> >>> + CTLFLAG_RD, 0, "A regulator node");
> >>> +
> >>> + SYSCTL_ADD_INT(®node->sysctl_ctx,
> >>> + SYSCTL_CHILDREN(regnode_oid),
> >>> + OID_AUTO, "min_uvolt",
> >>> + CTLFLAG_RD, ®node->std_param.min_uvolt, 0,
> >>> + "Minimal voltage (in uV)");
> >>> + SYSCTL_ADD_INT(®node->sysctl_ctx,
> >>> + SYSCTL_CHILDREN(regnode_oid),
> >>> + OID_AUTO, "max_uvolt",
> >>> + CTLFLAG_RD, ®node->std_param.max_uvolt, 0,
> >>> + "Maximal voltage (in uV)");
> >>> + SYSCTL_ADD_INT(®node->sysctl_ctx,
> >>> + SYSCTL_CHILDREN(regnode_oid),
> >>> + OID_AUTO, "min_uamp",
> >>> + CTLFLAG_RD, ®node->std_param.min_uamp, 0,
> >>> + "Minimal amperage (in uA)");
> >>> + SYSCTL_ADD_INT(®node->sysctl_ctx,
> >>> + SYSCTL_CHILDREN(regnode_oid),
> >>> + OID_AUTO, "max_uamp",
> >>> + CTLFLAG_RD, ®node->std_param.max_uamp, 0,
> >>> + "Maximal amperage (in uA)");
> >>> + SYSCTL_ADD_INT(®node->sysctl_ctx,
> >>> + SYSCTL_CHILDREN(regnode_oid),
> >>> + OID_AUTO, "ramp_delay",
> >>> + CTLFLAG_RD, ®node->std_param.ramp_delay, 0,
> >>> + "Ramp delay (in uV/us)");
> >>> + SYSCTL_ADD_INT(®node->sysctl_ctx,
> >>> + SYSCTL_CHILDREN(regnode_oid),
> >>> + OID_AUTO, "enable_delay",
> >>> + CTLFLAG_RD, ®node->std_param.enable_delay, 0,
> >>> + "Enable delay (in us)");
> >>> + SYSCTL_ADD_INT(®node->sysctl_ctx,
> >>> + SYSCTL_CHILDREN(regnode_oid),
> >>> + OID_AUTO, "enable_cnt",
> >>> + CTLFLAG_RD, ®node->enable_cnt, 0,
> >>> + "The regulator enable counter");
> >>> + SYSCTL_ADD_U8(®node->sysctl_ctx,
> >>> + SYSCTL_CHILDREN(regnode_oid),
> >>> + OID_AUTO, "boot_on",
> >>> + CTLFLAG_RD, (uint8_t *) ®node->std_param.boot_on, 0,
> >>> + "Is enabled on boot");
> >>> + SYSCTL_ADD_U8(®node->sysctl_ctx,
> >>> + SYSCTL_CHILDREN(regnode_oid),
> >>> + OID_AUTO, "always_on",
> >>> + CTLFLAG_RD, (uint8_t *)®node->std_param.always_on, 0,
> >>> + "Is always enabled");
> >>> +
> >>> + SYSCTL_ADD_PROC(®node->sysctl_ctx,
> >>> + SYSCTL_CHILDREN(regnode_oid),
> >>> + OID_AUTO, "uvolt",
> >>> + CTLTYPE_INT | CTLFLAG_RD,
> >>> + regnode, 0, regnode_uvolt_sysctl,
> >>> + "I",
> >>> + "Current voltage (in uV)");
> >>> +
> >>> + return (regnode);
> >>> +}
> >>> +
> >>> +/* Register regulator object. */
> >>> +struct regnode *
> >>> +regnode_register(struct regnode *regnode)
> >>> +{
> >>> + int rv;
> >>> +
> >>> +#ifdef FDT
> >>> + if (regnode->ofw_node <= 0)
> >>> + regnode->ofw_node = ofw_bus_get_node(regnode->pdev);
> >>> + if (regnode->ofw_node <= 0)
> >>> + return (NULL);
> >>> +#endif
> >>> +
> >>> + rv = REGNODE_INIT(regnode);
> >>> + if (rv != 0) {
> >>> + printf("REGNODE_INIT failed: %d\n", rv);
> >>> + return (NULL);
> >>> + }
> >>> +
> >>> + REG_TOPO_XLOCK();
> >>> + TAILQ_INSERT_TAIL(®node_list, regnode, reglist_link);
> >>> + REG_TOPO_UNLOCK();
> >>> +#ifdef FDT
> >>> + OF_device_register_xref(OF_xref_from_node(regnode-
> >>>> ofw_node),
> >>> + regnode->pdev);
> >>> +#endif
> >>> + return (regnode);
> >>> +}
> >>> +
> >>> +static int
> >>> +regnode_resolve_parent(struct regnode *regnode)
> >>> +{
> >>> +
> >>> + /* All ready resolved or no parent? */
> >>> + if ((regnode->parent != NULL) ||
> >>> + (regnode->parent_name == NULL))
> >>> + return (0);
> >>> +
> >>> + regnode->parent = regnode_find_by_name(regnode-
> >>>> parent_name);
> >>> + if (regnode->parent == NULL)
> >>> + return (ENODEV);
> >>> + return (0);
> >>> +}
> >>> +
> >>> +static void
> >>> +regnode_delay(int usec)
> >>> +{
> >>> + int ticks;
> >>> +
> >>> + if (usec == 0)
> >>> + return;
> >>> + ticks = (usec * hz + 999999) / 1000000;
> >>> +
> >>> + if (cold || ticks < 2)
> >>> + DELAY(usec);
> >>> + else
> >>> + pause("REGULATOR", ticks);
> >>> +}
> >>> +
> >>> +/* --------------------------------------------------------------------------
> >>> + *
> >>> + * Regulator providers interface
> >>> + *
> >>> + */
> >>> +
> >>> +const char *
> >>> +regnode_get_name(struct regnode *regnode)
> >>> +{
> >>> +
> >>> + return (regnode->name);
> >>> +}
> >>> +
> >>> +const char *
> >>> +regnode_get_parent_name(struct regnode *regnode)
> >>> +{
> >>> +
> >>> + return (regnode->parent_name);
> >>> +}
> >>> +
> >>> +int
> >>> +regnode_get_flags(struct regnode *regnode)
> >>> +{
> >>> +
> >>> + return (regnode->flags);
> >>> +}
> >>> +
> >>> +void *
> >>> +regnode_get_softc(struct regnode *regnode)
> >>> +{
> >>> +
> >>> + return (regnode->softc);
> >>> +}
> >>> +
> >>> +device_t
> >>> +regnode_get_device(struct regnode *regnode)
> >>> +{
> >>> +
> >>> + return (regnode->pdev);
> >>> +}
> >>> +
> >>> +struct regnode_std_param *regnode_get_stdparam(struct regnode
> >>> *regnode)
> >>> +{
> >>> +
> >>> + return (®node->std_param);
> >>> +}
> >>> +
> >>> +void regnode_topo_unlock(void)
> >>> +{
> >>> +
> >>> + REG_TOPO_UNLOCK();
> >>> +}
> >>> +
> >>> +void regnode_topo_xlock(void)
> >>> +{
> >>> +
> >>> + REG_TOPO_XLOCK();
> >>> +}
> >>> +
> >>> +void regnode_topo_slock(void)
> >>> +{
> >>> +
> >>> + REG_TOPO_SLOCK();
> >>> +}
> >>> +
> >>> +
> >>> +/* --------------------------------------------------------------------------
> >>> + *
> >>> + * Real consumers executive
> >>> + *
> >>> + */
> >>> +struct regnode *
> >>> +regnode_get_parent(struct regnode *regnode)
> >>> +{
> >>> + int rv;
> >>> +
> >>> + REG_TOPO_ASSERT();
> >>> +
> >>> + rv = regnode_resolve_parent(regnode);
> >>> + if (rv != 0)
> >>> + return (NULL);
> >>> +
> >>> + return (regnode->parent);
> >>> +}
> >>> +
> >>> +/*
> >>> + * Enable regulator.
> >>> + */
> >>> +int
> >>> +regnode_enable(struct regnode *regnode)
> >>> +{
> >>> + int udelay;
> >>> + int rv;
> >>> +
> >>> + REG_TOPO_ASSERT();
> >>> +
> >>> + /* Enable regulator for each node in chain, starting from source. */
> >>> + rv = regnode_resolve_parent(regnode);
> >>> + if (rv != 0)
> >>> + return (rv);
> >>> + if (regnode->parent != NULL) {
> >>> + rv = regnode_enable(regnode->parent);
> >>> + if (rv != 0)
> >>> + return (rv);
> >>> + }
> >>> +
> >>> + /* Handle this node. */
> >>> + REGNODE_XLOCK(regnode);
> >>> + if (regnode->enable_cnt == 0) {
> >>> + rv = REGNODE_ENABLE(regnode, true, &udelay);
> >>> + if (rv != 0) {
> >>> + REGNODE_UNLOCK(regnode);
> >>> + return (rv);
> >>> + }
> >>> + regnode_delay(udelay);
> >>> + }
> >>> + regnode->enable_cnt++;
> >>> + REGNODE_UNLOCK(regnode);
> >>> + return (0);
> >>> +}
> >>> +
> >>> +/*
> >>> + * Disable regulator.
> >>> + */
> >>> +int
> >>> +regnode_disable(struct regnode *regnode)
> >>> +{
> >>> + int udelay;
> >>> + int rv;
> >>> +
> >>> + REG_TOPO_ASSERT();
> >>> + rv = 0;
> >>> +
> >>> + REGNODE_XLOCK(regnode);
> >>> + /* Disable regulator for each node in chain, starting from consumer.
> >>> */
> >>> + if (regnode->enable_cnt == 1 &&
> >>> + (regnode->flags & REGULATOR_FLAGS_NOT_DISABLE) == 0 &&
> >>> + !regnode->std_param.always_on) {
> >>> + rv = REGNODE_ENABLE(regnode, false, &udelay);
> >>> + if (rv != 0) {
> >>> + REGNODE_UNLOCK(regnode);
> >>> + return (rv);
> >>> + }
> >>> + regnode_delay(udelay);
> >>> + }
> >>> + regnode->enable_cnt--;
> >>> + REGNODE_UNLOCK(regnode);
> >>> +
> >>> + rv = regnode_resolve_parent(regnode);
> >>> + if (rv != 0)
> >>> + return (rv);
> >>> + if (regnode->parent != NULL)
> >>> + rv = regnode_disable(regnode->parent);
> >>> + return (rv);
> >>> +}
> >>> +
> >>> +/*
> >>> + * Stop regulator.
> >>> + */
> >>> +int
> >>> +regnode_stop(struct regnode *regnode, int depth)
> >>> +{
> >>> + int udelay;
> >>> + int rv;
> >>> +
> >>> + REG_TOPO_ASSERT();
> >>> + rv = 0;
> >>> +
> >>> + REGNODE_XLOCK(regnode);
> >>> + /* The first node must not be enabled. */
> >>> + if ((regnode->enable_cnt != 0) && (depth == 0)) {
> >>> + REGNODE_UNLOCK(regnode);
> >>> + return (EBUSY);
> >>> + }
> >>> + /* Disable regulator for each node in chain, starting from consumer
> >>> */
> >>> + if ((regnode->enable_cnt == 0) &&
> >>> + ((regnode->flags & REGULATOR_FLAGS_NOT_DISABLE) == 0)) {
> >>> + rv = REGNODE_STOP(regnode, &udelay);
> >>> + if (rv != 0) {
> >>> + REGNODE_UNLOCK(regnode);
> >>> + return (rv);
> >>> + }
> >>> + regnode_delay(udelay);
> >>> + }
> >>> + REGNODE_UNLOCK(regnode);
> >>> +
> >>> + rv = regnode_resolve_parent(regnode);
> >>> + if (rv != 0)
> >>> + return (rv);
> >>> + if (regnode->parent != NULL && regnode->parent->enable_cnt == 0)
> >>> + rv = regnode_stop(regnode->parent, depth + 1);
> >>> + return (rv);
> >>> +}
> >>> +
> >>> +/*
> >>> + * Get regulator status. (REGULATOR_STATUS_*)
> >>> + */
> >>> +int
> >>> +regnode_status(struct regnode *regnode, int *status)
> >>> +{
> >>> + int rv;
> >>> +
> >>> + REG_TOPO_ASSERT();
> >>> +
> >>> + REGNODE_XLOCK(regnode);
> >>> + rv = REGNODE_STATUS(regnode, status);
> >>> + REGNODE_UNLOCK(regnode);
> >>> + return (rv);
> >>> +}
> >>> +
> >>> +/*
> >>> + * Get actual regulator voltage.
> >>> + */
> >>> +int
> >>> +regnode_get_voltage(struct regnode *regnode, int *uvolt)
> >>> +{
> >>> + int rv;
> >>> +
> >>> + REG_TOPO_ASSERT();
> >>> +
> >>> + REGNODE_XLOCK(regnode);
> >>> + rv = REGNODE_GET_VOLTAGE(regnode, uvolt);
> >>> + REGNODE_UNLOCK(regnode);
> >>> +
> >>> + /* Pass call into parent, if regulator is in bypass mode. */
> >>> + if (rv == ENOENT) {
> >>> + rv = regnode_resolve_parent(regnode);
> >>> + if (rv != 0)
> >>> + return (rv);
> >>> + if (regnode->parent != NULL)
> >>> + rv = regnode_get_voltage(regnode->parent, uvolt);
> >>> +
> >>> + }
> >>> + return (rv);
> >>> +}
> >>> +
> >>> +/*
> >>> + * Set regulator voltage.
> >>> + */
> >>> +int
> >>> +regnode_set_voltage(struct regnode *regnode, int min_uvolt, int
> >>> max_uvolt)
> >>> +{
> >>> + int udelay;
> >>> + int rv;
> >>> +
> >>> + REG_TOPO_ASSERT();
> >>> +
> >>> + REGNODE_XLOCK(regnode);
> >>> +
> >>> + rv = REGNODE_SET_VOLTAGE(regnode, min_uvolt, max_uvolt,
> >>> &udelay);
> >>> + if (rv == 0)
> >>> + regnode_delay(udelay);
> >>> + REGNODE_UNLOCK(regnode);
> >>> + return (rv);
> >>> +}
> >>> +
> >>> +/*
> >>> + * Consumer variant of regnode_set_voltage().
> >>> + */
> >>> +static int
> >>> +regnode_set_voltage_checked(struct regnode *regnode, struct
> regulator
> >>> *reg,
> >>> + int min_uvolt, int max_uvolt)
> >>> +{
> >>> + int udelay;
> >>> + int all_max_uvolt;
> >>> + int all_min_uvolt;
> >>> + struct regulator *tmp;
> >>> + int rv;
> >>> +
> >>> + REG_TOPO_ASSERT();
> >>> +
> >>> + REGNODE_XLOCK(regnode);
> >>> + /* Return error if requested range is outside of regulator range. */
> >>> + if ((min_uvolt > regnode->std_param.max_uvolt) ||
> >>> + (max_uvolt < regnode->std_param.min_uvolt)) {
> >>> + REGNODE_UNLOCK(regnode);
> >>> + return (ERANGE);
> >>> + }
> >>> +
> >>> + /* Get actual voltage range for all consumers. */
> >>> + all_min_uvolt = regnode->std_param.min_uvolt;
> >>> + all_max_uvolt = regnode->std_param.max_uvolt;
> >>> + TAILQ_FOREACH(tmp, ®node->consumers_list, link) {
> >>> + /* Don't take requestor in account. */
> >>> + if (tmp == reg)
> >>> + continue;
> >>> + if (all_min_uvolt < tmp->min_uvolt)
> >>> + all_min_uvolt = tmp->min_uvolt;
> >>> + if (all_max_uvolt > tmp->max_uvolt)
> >>> + all_max_uvolt = tmp->max_uvolt;
> >>> + }
> >>> +
> >>> + /* Test if request fits to actual contract. */
> >>> + if ((min_uvolt > all_max_uvolt) ||
> >>> + (max_uvolt < all_min_uvolt)) {
> >>> + REGNODE_UNLOCK(regnode);
> >>> + return (ERANGE);
> >>> + }
> >>> +
> >>> + /* Adjust new range.*/
> >>> + if (min_uvolt < all_min_uvolt)
> >>> + min_uvolt = all_min_uvolt;
> >>> + if (max_uvolt > all_max_uvolt)
> >>> + max_uvolt = all_max_uvolt;
> >>> +
> >>> + rv = REGNODE_SET_VOLTAGE(regnode, min_uvolt, max_uvolt,
> >>> &udelay);
> >>> + regnode_delay(udelay);
> >>> + REGNODE_UNLOCK(regnode);
> >>> + return (rv);
> >>> +}
> >>> +
> >>> +int
> >>> +regnode_set_constraint(struct regnode *regnode)
> >>> +{
> >>> + int status, rv, uvolt;
> >>> +
> >>> + if (regnode->std_param.boot_on != true &&
> >>> + regnode->std_param.always_on != true)
> >>> + return (0);
> >>> +
> >>> + rv = regnode_status(regnode, &status);
> >>> + if (rv != 0) {
> >>> + if (bootverbose)
> >>> + printf("Cannot get regulator status for %s\n",
> >>> + regnode_get_name(regnode));
> >>> + return (rv);
> >>> + }
> >>> +
> >>> + if (status == REGULATOR_STATUS_ENABLED)
> >>> + return (0);
> >>> +
> >>> + rv = regnode_get_voltage(regnode, &uvolt);
> >>> + if (rv != 0) {
> >>> + if (bootverbose)
> >>> + printf("Cannot get regulator voltage for %s\n",
> >>> + regnode_get_name(regnode));
> >>> + return (rv);
> >>> + }
> >>> +
> >>> + if (uvolt < regnode->std_param.min_uvolt ||
> >>> + uvolt > regnode->std_param.max_uvolt) {
> >>> + if (bootverbose)
> >>> + printf("Regulator %s current voltage %d is not in the"
> >>> + " acceptable range : %d<->%d\n",
> >>> + regnode_get_name(regnode),
> >>> + uvolt, regnode->std_param.min_uvolt,
> >>> + regnode->std_param.max_uvolt);
> >>> + return (ERANGE);
> >>> + }
> >>> +
> >>> + rv = regnode_enable(regnode);
> >>> + if (rv != 0) {
> >>> + if (bootverbose)
> >>> + printf("Cannot enable regulator %s\n",
> >>> + regnode_get_name(regnode));
> >>> + return (rv);
> >>> + }
> >>> +
> >>> + return (0);
> >>> +}
> >>> +
> >>> +#ifdef FDT
> >>> +phandle_t
> >>> +regnode_get_ofw_node(struct regnode *regnode)
> >>> +{
> >>> +
> >>> + return (regnode->ofw_node);
> >>> +}
> >>> +#endif
> >>> +
> >>> +/* --------------------------------------------------------------------------
> >>> + *
> >>> + * Regulator consumers interface.
> >>> + *
> >>> + */
> >>> +/* Helper function for regulator_get*() */
> >>> +static regulator_t
> >>> +regulator_create(struct regnode *regnode, device_t cdev)
> >>> +{
> >>> + struct regulator *reg;
> >>> +
> >>> + REG_TOPO_ASSERT();
> >>> +
> >>> + reg = malloc(sizeof(struct regulator), M_REGULATOR,
> >>> + M_WAITOK | M_ZERO);
> >>> + reg->cdev = cdev;
> >>> + reg->regnode = regnode;
> >>> + reg->enable_cnt = 0;
> >>> +
> >>> + REGNODE_XLOCK(regnode);
> >>> + regnode->ref_cnt++;
> >>> + TAILQ_INSERT_TAIL(®node->consumers_list, reg, link);
> >>> + reg ->min_uvolt = regnode->std_param.min_uvolt;
> >>> + reg ->max_uvolt = regnode->std_param.max_uvolt;
> >>> + REGNODE_UNLOCK(regnode);
> >>> +
> >>> + return (reg);
> >>> +}
> >>> +
> >>> +int
> >>> +regulator_enable(regulator_t reg)
> >>> +{
> >>> + int rv;
> >>> + struct regnode *regnode;
> >>> +
> >>> + regnode = reg->regnode;
> >>> + KASSERT(regnode->ref_cnt > 0,
> >>> + ("Attempt to access unreferenced regulator: %s\n", regnode-
> >>>> name));
> >>> + REG_TOPO_SLOCK();
> >>> + rv = regnode_enable(regnode);
> >>> + if (rv == 0)
> >>> + reg->enable_cnt++;
> >>> + REG_TOPO_UNLOCK();
> >>> + return (rv);
> >>> +}
> >>> +
> >>> +int
> >>> +regulator_disable(regulator_t reg)
> >>> +{
> >>> + int rv;
> >>> + struct regnode *regnode;
> >>> +
> >>> + regnode = reg->regnode;
> >>> + KASSERT(regnode->ref_cnt > 0,
> >>> + ("Attempt to access unreferenced regulator: %s\n", regnode-
> >>>> name));
> >>> + KASSERT(reg->enable_cnt > 0,
> >>> + ("Attempt to disable already disabled regulator: %s\n",
> >>> + regnode->name));
> >>> + REG_TOPO_SLOCK();
> >>> + rv = regnode_disable(regnode);
> >>> + if (rv == 0)
> >>> + reg->enable_cnt--;
> >>> + REG_TOPO_UNLOCK();
> >>> + return (rv);
> >>> +}
> >>> +
> >>> +int
> >>> +regulator_stop(regulator_t reg)
> >>> +{
> >>> + int rv;
> >>> + struct regnode *regnode;
> >>> +
> >>> + regnode = reg->regnode;
> >>> + KASSERT(regnode->ref_cnt > 0,
> >>> + ("Attempt to access unreferenced regulator: %s\n", regnode-
> >>>> name));
> >>> + KASSERT(reg->enable_cnt == 0,
> >>> + ("Attempt to stop already enabled regulator: %s\n", regnode-
> >>>> name));
> >>> +
> >>> + REG_TOPO_SLOCK();
> >>> + rv = regnode_stop(regnode, 0);
> >>> + REG_TOPO_UNLOCK();
> >>> + return (rv);
> >>> +}
> >>> +
> >>> +int
> >>> +regulator_status(regulator_t reg, int *status)
> >>> +{
> >>> + int rv;
> >>> + struct regnode *regnode;
> >>> +
> >>> + regnode = reg->regnode;
> >>> + KASSERT(regnode->ref_cnt > 0,
> >>> + ("Attempt to access unreferenced regulator: %s\n", regnode-
> >>>> name));
> >>> +
> >>> + REG_TOPO_SLOCK();
> >>> + rv = regnode_status(regnode, status);
> >>> + REG_TOPO_UNLOCK();
> >>> + return (rv);
> >>> +}
> >>> +
> >>> +int
> >>> +regulator_get_voltage(regulator_t reg, int *uvolt)
> >>> +{
> >>> + int rv;
> >>> + struct regnode *regnode;
> >>> +
> >>> + regnode = reg->regnode;
> >>> + KASSERT(regnode->ref_cnt > 0,
> >>> + ("Attempt to access unreferenced regulator: %s\n", regnode-
> >>>> name));
> >>> +
> >>> + REG_TOPO_SLOCK();
> >>> + rv = regnode_get_voltage(regnode, uvolt);
> >>> + REG_TOPO_UNLOCK();
> >>> + return (rv);
> >>> +}
> >>> +
> >>> +int
> >>> +regulator_set_voltage(regulator_t reg, int min_uvolt, int max_uvolt)
> >>> +{
> >>> + struct regnode *regnode;
> >>> + int rv;
> >>> +
> >>> + regnode = reg->regnode;
> >>> + KASSERT(regnode->ref_cnt > 0,
> >>> + ("Attempt to access unreferenced regulator: %s\n", regnode-
> >>>> name));
> >>> +
> >>> + REG_TOPO_SLOCK();
> >>> +
> >>> + rv = regnode_set_voltage_checked(regnode, reg, min_uvolt,
> >>> max_uvolt);
> >>> + if (rv == 0) {
> >>> + reg->min_uvolt = min_uvolt;
> >>> + reg->max_uvolt = max_uvolt;
> >>> + }
> >>> + REG_TOPO_UNLOCK();
> >>> + return (rv);
> >>> +}
> >>> +
> >>> +int
> >>> +regulator_check_voltage(regulator_t reg, int uvolt)
> >>> +{
> >>> + int rv;
> >>> + struct regnode *regnode;
> >>> +
> >>> + regnode = reg->regnode;
> >>> + KASSERT(regnode->ref_cnt > 0,
> >>> + ("Attempt to access unreferenced regulator: %s\n", regnode-
> >>>> name));
> >>> +
> >>> + REG_TOPO_SLOCK();
> >>> + rv = REGNODE_CHECK_VOLTAGE(regnode, uvolt);
> >>> + REG_TOPO_UNLOCK();
> >>> + return (rv);
> >>> +}
> >>> +
> >>> +const char *
> >>> +regulator_get_name(regulator_t reg)
> >>> +{
> >>> + struct regnode *regnode;
> >>> +
> >>> + regnode = reg->regnode;
> >>> + KASSERT(regnode->ref_cnt > 0,
> >>> + ("Attempt to access unreferenced regulator: %s\n", regnode-
> >>>> name));
> >>> + return (regnode->name);
> >>> +}
> >>> +
> >>> +int
> >>> +regulator_get_by_name(device_t cdev, const char *name, regulator_t
> >>> *reg)
> >>> +{
> >>> + struct regnode *regnode;
> >>> +
> >>> + REG_TOPO_SLOCK();
> >>> + regnode = regnode_find_by_name(name);
> >>> + if (regnode == NULL) {
> >>> + REG_TOPO_UNLOCK();
> >>> + return (ENODEV);
> >>> + }
> >>> + *reg = regulator_create(regnode, cdev);
> >>> + REG_TOPO_UNLOCK();
> >>> + return (0);
> >>> +}
> >>> +
> >>> +int
> >>> +regulator_get_by_id(device_t cdev, device_t pdev, intptr_t id,
> regulator_t
> >>> *reg)
> >>> +{
> >>> + struct regnode *regnode;
> >>> +
> >>> + REG_TOPO_SLOCK();
> >>> +
> >>> + regnode = regnode_find_by_id(pdev, id);
> >>> + if (regnode == NULL) {
> >>> + REG_TOPO_UNLOCK();
> >>> + return (ENODEV);
> >>> + }
> >>> + *reg = regulator_create(regnode, cdev);
> >>> + REG_TOPO_UNLOCK();
> >>> +
> >>> + return (0);
> >>> +}
> >>> +
> >>> +int
> >>> +regulator_release(regulator_t reg)
> >>> +{
> >>> + struct regnode *regnode;
> >>> +
> >>> + regnode = reg->regnode;
> >>> + KASSERT(regnode->ref_cnt > 0,
> >>> + ("Attempt to access unreferenced regulator: %s\n", regnode-
> >>>> name));
> >>> + REG_TOPO_SLOCK();
> >>> + while (reg->enable_cnt > 0) {
> >>> + regnode_disable(regnode);
> >>> + reg->enable_cnt--;
> >>> + }
> >>> + REGNODE_XLOCK(regnode);
> >>> + TAILQ_REMOVE(®node->consumers_list, reg, link);
> >>> + regnode->ref_cnt--;
> >>> + REGNODE_UNLOCK(regnode);
> >>> + REG_TOPO_UNLOCK();
> >>> +
> >>> + free(reg, M_REGULATOR);
> >>> + return (0);
> >>> +}
> >>> +
> >>> +#ifdef FDT
> >>> +/* Default DT mapper. */
> >>> +int
> >>> +regdev_default_ofw_map(device_t dev, phandle_t xref, int ncells,
> >>> + pcell_t *cells, intptr_t *id)
> >>> +{
> >>> + if (ncells == 0)
> >>> + *id = 1;
> >>> + else if (ncells == 1)
> >>> + *id = cells[0];
> >>> + else
> >>> + return (ERANGE);
> >>> +
> >>> + return (0);
> >>> +}
> >>> +
> >>> +int
> >>> +regulator_parse_ofw_stdparam(device_t pdev, phandle_t node,
> >>> + struct regnode_init_def *def)
> >>> +{
> >>> + phandle_t supply_xref;
> >>> + struct regnode_std_param *par;
> >>> + int rv;
> >>> +
> >>> + par = &def->std_param;
> >>> + rv = OF_getprop_alloc(node, "regulator-name",
> >>> + (void **)&def->name);
> >>> + if (rv <= 0) {
> >>> + device_printf(pdev, "%s: Missing regulator name\n",
> >>> + __func__);
> >>> + return (ENXIO);
> >>> + }
> >>> +
> >>> + rv = OF_getencprop(node, "regulator-min-microvolt", &par-
> >>>> min_uvolt,
> >>> + sizeof(par->min_uvolt));
> >>> + if (rv <= 0)
> >>> + par->min_uvolt = 0;
> >>> +
> >>> + rv = OF_getencprop(node, "regulator-max-microvolt", &par-
> >>>> max_uvolt,
> >>> + sizeof(par->max_uvolt));
> >>> + if (rv <= 0)
> >>> + par->max_uvolt = 0;
> >>> +
> >>> + rv = OF_getencprop(node, "regulator-min-microamp", &par-
> >>>> min_uamp,
> >>> + sizeof(par->min_uamp));
> >>> + if (rv <= 0)
> >>> + par->min_uamp = 0;
> >>> +
> >>> + rv = OF_getencprop(node, "regulator-max-microamp", &par-
> >>>> max_uamp,
> >>> + sizeof(par->max_uamp));
> >>> + if (rv <= 0)
> >>> + par->max_uamp = 0;
> >>> +
> >>> + rv = OF_getencprop(node, "regulator-ramp-delay", &par-
> >>>> ramp_delay,
> >>> + sizeof(par->ramp_delay));
> >>> + if (rv <= 0)
> >>> + par->ramp_delay = 0;
> >>> +
> >>> + rv = OF_getencprop(node, "regulator-enable-ramp-delay",
> >>> + &par->enable_delay, sizeof(par->enable_delay));
> >>> + if (rv <= 0)
> >>> + par->enable_delay = 0;
> >>> +
> >>> + if (OF_hasprop(node, "regulator-boot-on"))
> >>> + par->boot_on = true;
> >>> +
> >>> + if (OF_hasprop(node, "regulator-always-on"))
> >>> + par->always_on = true;
> >>> +
> >>> + if (OF_hasprop(node, "enable-active-high"))
> >>> + par->enable_active_high = 1;
> >>> +
> >>> + rv = OF_getencprop(node, "vin-supply", &supply_xref,
> >>> + sizeof(supply_xref));
> >>> + if (rv >= 0) {
> >>> + rv = OF_getprop_alloc(supply_xref, "regulator-name",
> >>> + (void **)&def->parent_name);
> >>> + if (rv <= 0)
> >>> + def->parent_name = NULL;
> >>> + }
> >>> + return (0);
> >>> +}
> >>> +
> >>> +int
> >>> +regulator_get_by_ofw_property(device_t cdev, phandle_t cnode, char
> >>> *name,
> >>> + regulator_t *reg)
> >>> +{
> >>> + phandle_t *cells;
> >>> + device_t regdev;
> >>> + int ncells, rv;
> >>> + intptr_t id;
> >>> +
> >>> + *reg = NULL;
> >>> +
> >>> + if (cnode <= 0)
> >>> + cnode = ofw_bus_get_node(cdev);
> >>> + if (cnode <= 0) {
> >>> + device_printf(cdev, "%s called on not ofw based device\n",
> >>> + __func__);
> >>> + return (ENXIO);
> >>> + }
> >>> +
> >>> + cells = NULL;
> >>> + ncells = OF_getencprop_alloc_multi(cnode, name, sizeof(*cells),
> >>> + (void **)&cells);
> >>> + if (ncells <= 0)
> >>> + return (ENOENT);
> >>> +
> >>> + /* Translate xref to device */
> >>> + regdev = OF_device_from_xref(cells[0]);
> >>> + if (regdev == NULL) {
> >>> + OF_prop_free(cells);
> >>> + return (ENODEV);
> >>> + }
> >>> +
> >>> + /* Map regulator to number */
> >>> + rv = REGDEV_MAP(regdev, cells[0], ncells - 1, cells + 1, &id);
> >>> + OF_prop_free(cells);
> >>> + if (rv != 0)
> >>> + return (rv);
> >>> + return (regulator_get_by_id(cdev, regdev, id, reg));
> >>> +}
> >>> +#endif
> >>> +
> >>> +/* --------------------------------------------------------------------------
> >>> + *
> >>> + * Regulator utility functions.
> >>> + *
> >>> + */
> >>> +
> >>> +/* Convert raw selector value to real voltage */
> >>> +int
> >>> +regulator_range_sel8_to_volt(struct regulator_range *ranges, int
> nranges,
> >>> + uint8_t sel, int *volt)
> >>> +{
> >>> + struct regulator_range *range;
> >>> + int i;
> >>> +
> >>> + if (nranges == 0)
> >>> + panic("Voltage regulator have zero ranges\n");
> >>> +
> >>> + for (i = 0; i < nranges ; i++) {
> >>> + range = ranges + i;
> >>> +
> >>> + if (!(sel >= range->min_sel &&
> >>> + sel <= range->max_sel))
> >>> + continue;
> >>> +
> >>> + sel -= range->min_sel;
> >>> +
> >>> + *volt = range->min_uvolt + sel * range->step_uvolt;
> >>> + return (0);
> >>> + }
> >>> +
> >>> + return (ERANGE);
> >>> +}
> >>> +
> >>> +int
> >>> +regulator_range_volt_to_sel8(struct regulator_range *ranges, int
> nranges,
> >>> + int min_uvolt, int max_uvolt, uint8_t *out_sel)
> >>> +{
> >>> + struct regulator_range *range;
> >>> + uint8_t sel;
> >>> + int uvolt;
> >>> + int rv, i;
> >>> +
> >>> + if (nranges == 0)
> >>> + panic("Voltage regulator have zero ranges\n");
> >>> +
> >>> + for (i = 0; i < nranges; i++) {
> >>> + range = ranges + i;
> >>> + uvolt = range->min_uvolt +
> >>> + (range->max_sel - range->min_sel) * range->step_uvolt;
> >>> +
> >>> + if ((min_uvolt > uvolt) ||
> >>> + (max_uvolt < range->min_uvolt))
> >>> + continue;
> >>> +
> >>> + if (min_uvolt <= range->min_uvolt)
> >>> + min_uvolt = range->min_uvolt;
> >>> +
> >>> + /* if step == 0 -> fixed voltage range. */
> >>> + if (range->step_uvolt == 0)
> >>> + sel = 0;
> >>> + else
> >>> + sel = DIV_ROUND_UP(min_uvolt - range->min_uvolt,
> >>> + range->step_uvolt);
> >>> +
> >>> +
> >>> + sel += range->min_sel;
> >>> +
> >>> + break;
> >>> + }
> >>> +
> >>> + if (i >= nranges)
> >>> + return (ERANGE);
> >>> +
> >>> + /* Verify new settings. */
> >>> + rv = regulator_range_sel8_to_volt(ranges, nranges, sel, &uvolt);
> >>> + if (rv != 0)
> >>> + return (rv);
> >>> + if ((uvolt < min_uvolt) || (uvolt > max_uvolt))
> >>> + return (ERANGE);
> >>> +
> >>> + *out_sel = sel;
> >>> + return (0);
> >>> +}
> >>> diff --git a/freebsd/sys/dev/extres/regulator/regulator.h
> >>> b/freebsd/sys/dev/extres/regulator/regulator.h
> >>> new file mode 100644
> >>> index 00000000..3905aa36
> >>> --- /dev/null
> >>> +++ b/freebsd/sys/dev/extres/regulator/regulator.h
> >>> @@ -0,0 +1,156 @@
> >>> +/*-
> >>> + * Copyright 2016 Michal Meloun <mmel at FreeBSD.org>
> >>> + * All rights reserved.
> >>> + *
> >>> + * Redistribution and use in source and binary forms, with or without
> >>> + * modification, are permitted provided that the following conditions
> >>> + * are met:
> >>> + * 1. Redistributions of source code must retain the above copyright
> >>> + * notice, this list of conditions and the following disclaimer.
> >>> + * 2. Redistributions in binary form must reproduce the above copyright
> >>> + * notice, this list of conditions and the following disclaimer in the
> >>> + * documentation and/or other materials provided with the
> distribution.
> >>> + *
> >>> + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS
> ``AS
> >>> IS'' AND
> >>> + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
> LIMITED
> >>> TO, THE
> >>> + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
> >>> PARTICULAR PURPOSE
> >>> + * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR
> CONTRIBUTORS
> >>> BE LIABLE
> >>> + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
> >>> CONSEQUENTIAL
> >>> + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
> >>> SUBSTITUTE GOODS
> >>> + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
> >>> INTERRUPTION)
> >>> + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
> >>> CONTRACT, STRICT
> >>> + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
> ARISING
> >>> IN ANY WAY
> >>> + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
> >>> POSSIBILITY OF
> >>> + * SUCH DAMAGE.
> >>> + *
> >>> + * $FreeBSD$
> >>> + */
> >>> +
> >>> +#ifndef _DEV_EXTRES_REGULATOR_H_
> >>> +#define _DEV_EXTRES_REGULATOR_H_
> >>> +#include <rtems/bsd/local/opt_platform.h>
> >>> +
> >>> +#include <sys/kobj.h>
> >>> +#include <sys/sysctl.h>
> >>> +#ifdef FDT
> >>> +#include <dev/ofw/ofw_bus.h>
> >>> +#endif
> >>> +#include <rtems/bsd/local/regnode_if.h>
> >>> +
> >>> +SYSCTL_DECL(_hw_regulator);
> >>> +
> >>> +#define REGULATOR_FLAGS_STATIC 0x00000001 /* Static
> strings */
> >>> +#define REGULATOR_FLAGS_NOT_DISABLE 0x00000002 /* Cannot
> be
> >>> disabled */
> >>> +
> >>> +#define REGULATOR_STATUS_ENABLED 0x00000001
> >>> +#define REGULATOR_STATUS_OVERCURRENT 0x00000002
> >>> +
> >>> +typedef struct regulator *regulator_t;
> >>> +
> >>> +/* Standard regulator parameters. */
> >>> +struct regnode_std_param {
> >>> + int min_uvolt; /* In uV */
> >>> + int max_uvolt; /* In uV */
> >>> + int min_uamp; /* In uA */
> >>> + int max_uamp; /* In uA */
> >>> + int ramp_delay; /* In uV/usec */
> >>> + int enable_delay; /* In usec */
> >>> + bool boot_on; /* Is enabled on boot */
> >>> + bool always_on; /* Must be enabled */
> >>> + int enable_active_high;
> >>> +};
> >>> +
> >>> +/* Initialization parameters. */
> >>> +struct regnode_init_def {
> >>> + char *name; /* Regulator name */
> >>> + char *parent_name; /* Name of parent
> >>> regulator */
> >>> + struct regnode_std_param std_param; /* Standard
> >>> parameters */
> >>> + intptr_t id; /* Regulator ID */
> >>> + int flags; /* Flags */
> >>> +#ifdef FDT
> >>> + phandle_t ofw_node; /* OFW node of regulator */
> >>> +#endif
> >>> +};
> >>> +
> >>> +struct regulator_range {
> >>> + int min_uvolt;
> >>> + int step_uvolt;
> >>> + uint8_t min_sel;
> >>> + uint8_t max_sel;
> >>> +};
> >>> +
> >>> +#define REG_RANGE_INIT(_min_sel, _max_sel, _min_uvolt,
> >>> _step_uvolt) { \
> >>> + .min_sel = _min_sel, \
> >>> + .max_sel = _max_sel, \
> >>> + .min_uvolt = _min_uvolt, \
> >>> + .step_uvolt = _step_uvolt, \
> >>> +}
> >>> +
> >>> +/*
> >>> + * Shorthands for constructing method tables.
> >>> + */
> >>> +#define REGNODEMETHOD KOBJMETHOD
> >>> +#define REGNODEMETHOD_END KOBJMETHOD_END
> >>> +#define regnode_method_t kobj_method_t
> >>> +#define regnode_class_t kobj_class_t
> >>> +DECLARE_CLASS(regnode_class);
> >>> +
> >>> +/* Providers interface. */
> >>> +struct regnode *regnode_create(device_t pdev, regnode_class_t
> >>> regnode_class,
> >>> + struct regnode_init_def *def);
> >>> +struct regnode *regnode_register(struct regnode *regnode);
> >>> +const char *regnode_get_name(struct regnode *regnode);
> >>> +const char *regnode_get_parent_name(struct regnode *regnode);
> >>> +struct regnode *regnode_get_parent(struct regnode *regnode);
> >>> +int regnode_get_flags(struct regnode *regnode);
> >>> +void *regnode_get_softc(struct regnode *regnode);
> >>> +device_t regnode_get_device(struct regnode *regnode);
> >>> +struct regnode_std_param *regnode_get_stdparam(struct regnode
> >>> *regnode);
> >>> +void regnode_topo_unlock(void);
> >>> +void regnode_topo_xlock(void);
> >>> +void regnode_topo_slock(void);
> >>> +
> >>> +int regnode_enable(struct regnode *regnode);
> >>> +int regnode_disable(struct regnode *regnode);
> >>> +int regnode_stop(struct regnode *regnode, int depth);
> >>> +int regnode_status(struct regnode *regnode, int *status);
> >>> +int regnode_get_voltage(struct regnode *regnode, int *uvolt);
> >>> +int regnode_set_voltage(struct regnode *regnode, int min_uvolt, int
> >>> max_uvolt);
> >>> +int regnode_set_constraint(struct regnode *regnode);
> >>> +
> >>> +/* Standard method that aren't default */
> >>> +int regnode_method_check_voltage(struct regnode *regnode, int
> uvolt);
> >>> +
> >>> +#ifdef FDT
> >>> +phandle_t regnode_get_ofw_node(struct regnode *regnode);
> >>> +#endif
> >>> +
> >>> +/* Consumers interface. */
> >>> +int regulator_get_by_name(device_t cdev, const char *name,
> >>> + regulator_t *regulator);
> >>> +int regulator_get_by_id(device_t cdev, device_t pdev, intptr_t id,
> >>> + regulator_t *regulator);
> >>> +int regulator_release(regulator_t regulator);
> >>> +const char *regulator_get_name(regulator_t regulator);
> >>> +int regulator_enable(regulator_t reg);
> >>> +int regulator_disable(regulator_t reg);
> >>> +int regulator_stop(regulator_t reg);
> >>> +int regulator_status(regulator_t reg, int *status);
> >>> +int regulator_get_voltage(regulator_t reg, int *uvolt);
> >>> +int regulator_set_voltage(regulator_t reg, int min_uvolt, int
> max_uvolt);
> >>> +int regulator_check_voltage(regulator_t reg, int uvolt);
> >>> +
> >>> +#ifdef FDT
> >>> +int regulator_get_by_ofw_property(device_t dev, phandle_t node,
> char
> >>> *name,
> >>> + regulator_t *reg);
> >>> +int regulator_parse_ofw_stdparam(device_t dev, phandle_t node,
> >>> + struct regnode_init_def *def);
> >>> +#endif
> >>> +
> >>> +/* Utility functions */
> >>> +int regulator_range_volt_to_sel8(struct regulator_range *ranges, int
> >>> nranges,
> >>> + int min_uvolt, int max_uvolt, uint8_t *out_sel);
> >>> +int regulator_range_sel8_to_volt(struct regulator_range *ranges, int
> >>> nranges,
> >>> + uint8_t sel, int *volt);
> >>> +
> >>> +#endif /* _DEV_EXTRES_REGULATOR_H_ */
> >>> diff --git a/freebsd/sys/dev/extres/regulator/regulator_bus.c
> >>> b/freebsd/sys/dev/extres/regulator/regulator_bus.c
> >>> new file mode 100644
> >>> index 00000000..b79c2633
> >>> --- /dev/null
> >>> +++ b/freebsd/sys/dev/extres/regulator/regulator_bus.c
> >>> @@ -0,0 +1,89 @@
> >>> +#include <machine/rtems-bsd-kernel-space.h>
> >>> +
> >>> +/*-
> >>> + * Copyright 2016 Michal Meloun <mmel at FreeBSD.org>
> >>> + * All rights reserved.
> >>> + *
> >>> + * Redistribution and use in source and binary forms, with or without
> >>> + * modification, are permitted provided that the following conditions
> >>> + * are met:
> >>> + * 1. Redistributions of source code must retain the above copyright
> >>> + * notice, this list of conditions and the following disclaimer.
> >>> + * 2. Redistributions in binary form must reproduce the above copyright
> >>> + * notice, this list of conditions and the following disclaimer in the
> >>> + * documentation and/or other materials provided with the
> distribution.
> >>> + *
> >>> + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS
> ``AS
> >>> IS'' AND
> >>> + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
> LIMITED
> >>> TO, THE
> >>> + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
> >>> PARTICULAR PURPOSE
> >>> + * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR
> CONTRIBUTORS
> >>> BE LIABLE
> >>> + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
> >>> CONSEQUENTIAL
> >>> + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
> >>> SUBSTITUTE GOODS
> >>> + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
> >>> INTERRUPTION)
> >>> + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
> >>> CONTRACT, STRICT
> >>> + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
> ARISING
> >>> IN ANY WAY
> >>> + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
> >>> POSSIBILITY OF
> >>> + * SUCH DAMAGE.
> >>> + */
> >>> +
> >>> +#include <sys/cdefs.h>
> >>> +__FBSDID("$FreeBSD$");
> >>> +
> >>> +#include <sys/param.h>
> >>> +#include <sys/systm.h>
> >>> +#include <sys/kernel.h>
> >>> +#include <sys/module.h>
> >>> +#include <sys/bus.h>
> >>> +
> >>> +#include <dev/fdt/simplebus.h>
> >>> +
> >>> +#include <dev/ofw/openfirm.h>
> >>> +#include <dev/ofw/ofw_bus_subr.h>
> >>> +
> >>> +struct ofw_regulator_bus_softc {
> >>> + struct simplebus_softc simplebus_sc;
> >>> +};
> >>> +
> >>> +static int
> >>> +ofw_regulator_bus_probe(device_t dev)
> >>> +{
> >>> + const char *name;
> >>> +
> >>> + name = ofw_bus_get_name(dev);
> >>> + if (name == NULL || strcmp(name, "regulators") != 0)
> >>> + return (ENXIO);
> >>> + device_set_desc(dev, "OFW regulators bus");
> >>> +
> >>> + return (0);
> >>> +}
> >>> +
> >>> +static int
> >>> +ofw_regulator_bus_attach(device_t dev)
> >>> +{
> >>> + phandle_t node, child;
> >>> +
> >>> + node = ofw_bus_get_node(dev);
> >>> + simplebus_init(dev, node);
> >>> +
> >>> + for (child = OF_child(node); child > 0; child = OF_peer(child)) {
> >>> + simplebus_add_device(dev, child, 0, NULL, -1, NULL);
> >>> + }
> >>> +
> >>> + return (bus_generic_attach(dev));
> >>> +}
> >>> +
> >>> +static device_method_t ofw_regulator_bus_methods[] = {
> >>> + /* Device interface */
> >>> + DEVMETHOD(device_probe, ofw_regulator_bus_probe),
> >>> + DEVMETHOD(device_attach, ofw_regulator_bus_attach),
> >>> +
> >>> + DEVMETHOD_END
> >>> +};
> >>> +
> >>> +DEFINE_CLASS_1(ofw_regulator_bus, ofw_regulator_bus_driver,
> >>> + ofw_regulator_bus_methods, sizeof(struct
> ofw_regulator_bus_softc),
> >>> + simplebus_driver);
> >>> +static devclass_t ofw_regulator_bus_devclass;
> >>> +EARLY_DRIVER_MODULE(ofw_regulator_bus, simplebus,
> >>> ofw_regulator_bus_driver,
> >>> + ofw_regulator_bus_devclass, 0, 0, BUS_PASS_BUS +
> >>> BUS_PASS_ORDER_MIDDLE);
> >>> +MODULE_VERSION(ofw_regulator_bus, 1);
> >>> diff --git a/freebsd/sys/dev/extres/regulator/regulator_fixed.c
> >>> b/freebsd/sys/dev/extres/regulator/regulator_fixed.c
> >>> new file mode 100644
> >>> index 00000000..0bc6d96e
> >>> --- /dev/null
> >>> +++ b/freebsd/sys/dev/extres/regulator/regulator_fixed.c
> >>> @@ -0,0 +1,502 @@
> >>> +#include <machine/rtems-bsd-kernel-space.h>
> >>> +
> >>> +/*-
> >>> + * Copyright 2016 Michal Meloun <mmel at FreeBSD.org>
> >>> + * All rights reserved.
> >>> + *
> >>> + * Redistribution and use in source and binary forms, with or without
> >>> + * modification, are permitted provided that the following conditions
> >>> + * are met:
> >>> + * 1. Redistributions of source code must retain the above copyright
> >>> + * notice, this list of conditions and the following disclaimer.
> >>> + * 2. Redistributions in binary form must reproduce the above copyright
> >>> + * notice, this list of conditions and the following disclaimer in the
> >>> + * documentation and/or other materials provided with the
> distribution.
> >>> + *
> >>> + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS
> ``AS
> >>> IS'' AND
> >>> + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
> LIMITED
> >>> TO, THE
> >>> + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
> >>> PARTICULAR PURPOSE
> >>> + * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR
> CONTRIBUTORS
> >>> BE LIABLE
> >>> + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
> >>> CONSEQUENTIAL
> >>> + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
> >>> SUBSTITUTE GOODS
> >>> + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
> >>> INTERRUPTION)
> >>> + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
> >>> CONTRACT, STRICT
> >>> + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
> ARISING
> >>> IN ANY WAY
> >>> + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
> >>> POSSIBILITY OF
> >>> + * SUCH DAMAGE.
> >>> + */
> >>> +
> >>> +#include <sys/cdefs.h>
> >>> +__FBSDID("$FreeBSD$");
> >>> +
> >>> +#include <rtems/bsd/local/opt_platform.h>
> >>> +#include <sys/param.h>
> >>> +#include <sys/conf.h>
> >>> +#include <sys/gpio.h>
> >>> +#include <sys/kernel.h>
> >>> +#include <sys/kobj.h>
> >>> +#include <sys/systm.h>
> >>> +#include <sys/module.h>
> >>> +#include <sys/mutex.h>
> >>> +
> >>> +#ifdef FDT
> >>> +#include <dev/fdt/fdt_common.h>
> >>> +#include <dev/ofw/ofw_bus.h>
> >>> +#include <dev/ofw/ofw_bus_subr.h>
> >>> +#endif
> >>> +#include <dev/gpio/gpiobusvar.h>
> >>> +#include <dev/extres/regulator/regulator_fixed.h>
> >>> +
> >>> +#include <rtems/bsd/local/regdev_if.h>
> >>> +
> >>> +MALLOC_DEFINE(M_FIXEDREGULATOR, "fixedregulator", "Fixed
> >>> regulator");
> >>> +
> >>> +/* GPIO list for shared pins. */
> >>> +typedef TAILQ_HEAD(gpio_list, gpio_entry) gpio_list_t;
> >>> +struct gpio_entry {
> >>> + TAILQ_ENTRY(gpio_entry) link;
> >>> + struct gpiobus_pin gpio_pin;
> >>> + int use_cnt;
> >>> + int enable_cnt;
> >>> + bool always_on;
> >>> +};
> >>> +static gpio_list_t gpio_list = TAILQ_HEAD_INITIALIZER(gpio_list);
> >>> +static struct mtx gpio_list_mtx;
> >>> +MTX_SYSINIT(gpio_list_lock, &gpio_list_mtx, "Regulator GPIO lock",
> >>> MTX_DEF);
> >>> +
> >>> +struct regnode_fixed_sc {
> >>> + struct regnode_std_param *param;
> >>> + bool gpio_open_drain;
> >>> + struct gpio_entry *gpio_entry;
> >>> +};
> >>> +
> >>> +static int regnode_fixed_init(struct regnode *regnode);
> >>> +static int regnode_fixed_enable(struct regnode *regnode, bool
> enable,
> >>> + int *udelay);
> >>> +static int regnode_fixed_status(struct regnode *regnode, int *status);
> >>> +static int regnode_fixed_stop(struct regnode *regnode, int *udelay);
> >>> +
> >>> +static regnode_method_t regnode_fixed_methods[] = {
> >>> + /* Regulator interface */
> >>> + REGNODEMETHOD(regnode_init, regnode_fixed_init),
> >>> + REGNODEMETHOD(regnode_enable,
> >>> regnode_fixed_enable),
> >>> + REGNODEMETHOD(regnode_status,
> >>> regnode_fixed_status),
> >>> + REGNODEMETHOD(regnode_stop, regnode_fixed_stop),
> >>> + REGNODEMETHOD(regnode_check_voltage,
> >>> regnode_method_check_voltage),
> >>> + REGNODEMETHOD_END
> >>> +};
> >>> +DEFINE_CLASS_1(regnode_fixed, regnode_fixed_class,
> >>> regnode_fixed_methods,
> >>> + sizeof(struct regnode_fixed_sc), regnode_class);
> >>> +
> >>> +/*
> >>> + * GPIO list functions.
> >>> + * Two or more regulators can share single GPIO pins, so we must track
> all
> >>> + * GPIOs in gpio_list.
> >>> + * The GPIO pin is registerd and reseved for first consumer, all others
> share
> >>> + * gpio_entry with it.
> >>> + */
> >>> +static struct gpio_entry *
> >>> +regnode_get_gpio_entry(struct gpiobus_pin *gpio_pin)
> >>> +{
> >>> + struct gpio_entry *entry, *tmp;
> >>> + device_t busdev;
> >>> + int rv;
> >>> +
> >>> + busdev = GPIO_GET_BUS(gpio_pin->dev);
> >>> + if (busdev == NULL)
> >>> + return (NULL);
> >>> + entry = malloc(sizeof(struct gpio_entry), M_FIXEDREGULATOR,
> >>> + M_WAITOK | M_ZERO);
> >>> +
> >>> + mtx_lock(&gpio_list_mtx);
> >>> +
> >>> + TAILQ_FOREACH(tmp, &gpio_list, link) {
> >>> + if (tmp->gpio_pin.dev == gpio_pin->dev &&
> >>> + tmp->gpio_pin.pin == gpio_pin->pin) {
> >>> + tmp->use_cnt++;
> >>> + mtx_unlock(&gpio_list_mtx);
> >>> + free(entry, M_FIXEDREGULATOR);
> >>> + return (tmp);
> >>> + }
> >>> + }
> >>> +
> >>> + /* Reserve pin. */
> >>> + /* XXX Can we call gpiobus_acquire_pin() with gpio_list_mtx held? */
> >>> + rv = gpiobus_acquire_pin(busdev, gpio_pin->pin);
> >>> + if (rv != 0) {
> >>> + mtx_unlock(&gpio_list_mtx);
> >>> + free(entry, M_FIXEDREGULATOR);
> >>> + return (NULL);
> >>> + }
> >>> + /* Everything is OK, build new entry and insert it to list. */
> >>> + entry->gpio_pin = *gpio_pin;
> >>> + entry->use_cnt = 1;
> >>> + TAILQ_INSERT_TAIL(&gpio_list, entry, link);
> >>> +
> >>> + mtx_unlock(&gpio_list_mtx);
> >>> + return (entry);
> >>> +}
> >>> +
> >>> +
> >>> +/*
> >>> + * Regulator class implementation.
> >>> + */
> >>> +static int
> >>> +regnode_fixed_init(struct regnode *regnode)
> >>> +{
> >>> + device_t dev;
> >>> + struct regnode_fixed_sc *sc;
> >>> + struct gpiobus_pin *pin;
> >>> + uint32_t flags;
> >>> + int rv;
> >>> +
> >>> + sc = regnode_get_softc(regnode);
> >>> + dev = regnode_get_device(regnode);
> >>> + sc->param = regnode_get_stdparam(regnode);
> >>> + if (sc->gpio_entry == NULL)
> >>> + return (0);
> >>> + pin = &sc->gpio_entry->gpio_pin;
> >>> +
> >>> + flags = GPIO_PIN_OUTPUT;
> >>> + if (sc->gpio_open_drain)
> >>> + flags |= GPIO_PIN_OPENDRAIN;
> >>> + if (sc->param->boot_on || sc->param->always_on) {
> >>> + rv = GPIO_PIN_SET(pin->dev, pin->pin, sc->param-
> >>>> enable_active_high);
> >>> + if (rv != 0) {
> >>> + device_printf(dev, "Cannot set GPIO pin: %d\n",
> >>> + pin->pin);
> >>> + return (rv);
> >>> + }
> >>> + }
> >>> +
> >>> + rv = GPIO_PIN_SETFLAGS(pin->dev, pin->pin, flags);
> >>> + if (rv != 0) {
> >>> + device_printf(dev, "Cannot configure GPIO pin: %d\n", pin-
> >>>> pin);
> >>> + return (rv);
> >>> + }
> >>> +
> >>> + return (0);
> >>> +}
> >>> +
> >>> +/*
> >>> + * Enable/disable regulator.
> >>> + * Take shared GPIO pins in account
> >>> + */
> >>> +static int
> >>> +regnode_fixed_enable(struct regnode *regnode, bool enable, int
> *udelay)
> >>> +{
> >>> + device_t dev;
> >>> + struct regnode_fixed_sc *sc;
> >>> + struct gpiobus_pin *pin;
> >>> + int rv;
> >>> +
> >>> + sc = regnode_get_softc(regnode);
> >>> + dev = regnode_get_device(regnode);
> >>> +
> >>> + *udelay = 0;
> >>> + if (sc->gpio_entry == NULL)
> >>> + return (0);
> >>> + pin = &sc->gpio_entry->gpio_pin;
> >>> + if (enable) {
> >>> + sc->gpio_entry->enable_cnt++;
> >>> + if (sc->gpio_entry->enable_cnt > 1)
> >>> + return (0);
> >>> + } else {
> >>> + KASSERT(sc->gpio_entry->enable_cnt > 0,
> >>> + ("Invalid enable count"));
> >>> + sc->gpio_entry->enable_cnt--;
> >>> + if (sc->gpio_entry->enable_cnt >= 1)
> >>> + return (0);
> >>> + }
> >>> + if (sc->gpio_entry->always_on && !enable)
> >>> + return (0);
> >>> + if (!sc->param->enable_active_high)
> >>> + enable = !enable;
> >>> + rv = GPIO_PIN_SET(pin->dev, pin->pin, enable);
> >>> + if (rv != 0) {
> >>> + device_printf(dev, "Cannot set GPIO pin: %d\n", pin->pin);
> >>> + return (rv);
> >>> + }
> >>> + *udelay = sc->param->enable_delay;
> >>> + return (0);
> >>> +}
> >>> +
> >>> +/*
> >>> + * Stop (physicaly shutdown) regulator.
> >>> + * Take shared GPIO pins in account
> >>> + */
> >>> +static int
> >>> +regnode_fixed_stop(struct regnode *regnode, int *udelay)
> >>> +{
> >>> + device_t dev;
> >>> + struct regnode_fixed_sc *sc;
> >>> + struct gpiobus_pin *pin;
> >>> + int rv;
> >>> +
> >>> + sc = regnode_get_softc(regnode);
> >>> + dev = regnode_get_device(regnode);
> >>> +
> >>> + *udelay = 0;
> >>> + if (sc->gpio_entry == NULL)
> >>> + return (0);
> >>> + if (sc->gpio_entry->always_on)
> >>> + return (0);
> >>> + pin = &sc->gpio_entry->gpio_pin;
> >>> + if (sc->gpio_entry->enable_cnt > 0) {
> >>> + /* Other regulator(s) are enabled. */
> >>> + /* XXXX Any diagnostic message? Or error? */
> >>> + return (0);
> >>> + }
> >>> + rv = GPIO_PIN_SET(pin->dev, pin->pin,
> >>> + sc->param->enable_active_high ? false: true);
> >>> + if (rv != 0) {
> >>> + device_printf(dev, "Cannot set GPIO pin: %d\n", pin->pin);
> >>> + return (rv);
> >>> + }
> >>> + *udelay = sc->param->enable_delay;
> >>> + return (0);
> >>> +}
> >>> +
> >>> +static int
> >>> +regnode_fixed_status(struct regnode *regnode, int *status)
> >>> +{
> >>> + struct regnode_fixed_sc *sc;
> >>> + struct gpiobus_pin *pin;
> >>> + uint32_t val;
> >>> + int rv;
> >>> +
> >>> + sc = regnode_get_softc(regnode);
> >>> +
> >>> + *status = 0;
> >>> + if (sc->gpio_entry == NULL) {
> >>> + *status = REGULATOR_STATUS_ENABLED;
> >>> + return (0);
> >>> + }
> >>> + pin = &sc->gpio_entry->gpio_pin;
> >>> +
> >>> + rv = GPIO_PIN_GET(pin->dev, pin->pin, &val);
> >>> + if (rv == 0) {
> >>> + if (!sc->param->enable_active_high ^ (val != 0))
> >>> + *status = REGULATOR_STATUS_ENABLED;
> >>> + }
> >>> + return (rv);
> >>> +}
> >>> +
> >>> +int
> >>> +regnode_fixed_register(device_t dev, struct regnode_fixed_init_def
> >>> *init_def)
> >>> +{
> >>> + struct regnode *regnode;
> >>> + struct regnode_fixed_sc *sc;
> >>> +
> >>> + regnode = regnode_create(dev, ®node_fixed_class,
> >>> + &init_def->reg_init_def);
> >>> + if (regnode == NULL) {
> >>> + device_printf(dev, "Cannot create regulator.\n");
> >>> + return(ENXIO);
> >>> + }
> >>> + sc = regnode_get_softc(regnode);
> >>> + sc->gpio_open_drain = init_def->gpio_open_drain;
> >>> + if (init_def->gpio_pin != NULL) {
> >>> + sc->gpio_entry = regnode_get_gpio_entry(init_def-
> >>>> gpio_pin);
> >>> + if (sc->gpio_entry == NULL)
> >>> + return(ENXIO);
> >>> + }
> >>> + regnode = regnode_register(regnode);
> >>> + if (regnode == NULL) {
> >>> + device_printf(dev, "Cannot register regulator.\n");
> >>> + return(ENXIO);
> >>> + }
> >>> +
> >>> + if (sc->gpio_entry != NULL)
> >>> + sc->gpio_entry->always_on |= sc->param->always_on;
> >>> +
> >>> + return (0);
> >>> +}
> >>> +
> >>> +/*
> >>> + * OFW Driver implementation.
> >>> + */
> >>> +#ifdef FDT
> >>> +
> >>> +struct regfix_softc
> >>> +{
> >>> + device_t dev;
> >>> + bool attach_done;
> >>> + struct regnode_fixed_init_def init_def;
> >>> + phandle_t gpio_prodxref;
> >>> + pcell_t *gpio_cells;
> >>> + int gpio_ncells;
> >>> + struct gpiobus_pin gpio_pin;
> >>> +};
> >>> +
> >>> +static struct ofw_compat_data compat_data[] = {
> >>> + {"regulator-fixed", 1},
> >>> + {NULL, 0},
> >>> +};
> >>> +
> >>> +static int
> >>> +regfix_get_gpio(struct regfix_softc * sc)
> >>> +{
> >>> + device_t busdev;
> >>> + phandle_t node;
> >>> +
> >>> + int rv;
> >>> +
> >>> + if (sc->gpio_prodxref == 0)
> >>> + return (0);
> >>> +
> >>> + node = ofw_bus_get_node(sc->dev);
> >>> +
> >>> + /* Test if controller exist. */
> >>> + sc->gpio_pin.dev = OF_device_from_xref(sc->gpio_prodxref);
> >>> + if (sc->gpio_pin.dev == NULL)
> >>> + return (ENODEV);
> >>> +
> >>> + /* Test if GPIO bus already exist. */
> >>> + busdev = GPIO_GET_BUS(sc->gpio_pin.dev);
> >>> + if (busdev == NULL)
> >>> + return (ENODEV);
> >>> +
> >>> + rv = gpio_map_gpios(sc->gpio_pin.dev, node,
> >>> + OF_node_from_xref(sc->gpio_prodxref), sc->gpio_ncells,
> >>> + sc->gpio_cells, &(sc->gpio_pin.pin), &(sc->gpio_pin.flags));
> >>> + if (rv != 0) {
> >>> + device_printf(sc->dev, "Cannot map the gpio property.\n");
> >>> + return (ENXIO);
> >>> + }
> >>> + sc->init_def.gpio_pin = &sc->gpio_pin;
> >>> + return (0);
> >>> +}
> >>> +
> >>> +static int
> >>> +regfix_parse_fdt(struct regfix_softc * sc)
> >>> +{
> >>> + phandle_t node;
> >>> + int rv;
> >>> + struct regnode_init_def *init_def;
> >>> +
> >>> + node = ofw_bus_get_node(sc->dev);
> >>> + init_def = &sc->init_def.reg_init_def;
> >>> +
> >>> + rv = regulator_parse_ofw_stdparam(sc->dev, node, init_def);
> >>> + if (rv != 0) {
> >>> + device_printf(sc->dev, "Cannot parse standard
> >>> parameters.\n");
> >>> + return(rv);
> >>> + }
> >>> +
> >>> + /* Fixed regulator uses 'startup-delay-us' property for enable_delay
> >>> */
> >>> + rv = OF_getencprop(node, "startup-delay-us",
> >>> + &init_def->std_param.enable_delay,
> >>> + sizeof(init_def->std_param.enable_delay));
> >>> + if (rv <= 0)
> >>> + init_def->std_param.enable_delay = 0;
> >>> + /* GPIO pin */
> >>> + if (OF_hasprop(node, "gpio-open-drain"))
> >>> + sc->init_def.gpio_open_drain = true;
> >>> +
> >>> + if (!OF_hasprop(node, "gpio"))
> >>> + return (0);
> >>> + rv = ofw_bus_parse_xref_list_alloc(node, "gpio", "#gpio-cells", 0,
> >>> + &sc->gpio_prodxref, &sc->gpio_ncells, &sc->gpio_cells);
> >>> + if (rv != 0) {
> >>> + sc->gpio_prodxref = 0;
> >>> + device_printf(sc->dev, "Malformed gpio property\n");
> >>> + return (ENXIO);
> >>> + }
> >>> + return (0);
> >>> +}
> >>> +
> >>> +static void
> >>> +regfix_new_pass(device_t dev)
> >>> +{
> >>> + struct regfix_softc * sc;
> >>> + int rv;
> >>> +
> >>> + sc = device_get_softc(dev);
> >>> + bus_generic_new_pass(dev);
> >>> +
> >>> + if (sc->attach_done)
> >>> + return;
> >>> +
> >>> + /* Try to get and configure GPIO. */
> >>> + rv = regfix_get_gpio(sc);
> >>> + if (rv != 0)
> >>> + return;
> >>> +
> >>> + /* Register regulator. */
> >>> + regnode_fixed_register(sc->dev, &sc->init_def);
> >>> + sc->attach_done = true;
> >>> +}
> >>> +
> >>> +static int
> >>> +regfix_probe(device_t dev)
> >>> +{
> >>> +
> >>> + if (!ofw_bus_status_okay(dev))
> >>> + return (ENXIO);
> >>> +
> >>> + if (!ofw_bus_search_compatible(dev, compat_data)->ocd_data)
> >>> + return (ENXIO);
> >>> +
> >>> + device_set_desc(dev, "Fixed Regulator");
> >>> + return (BUS_PROBE_DEFAULT);
> >>> +}
> >>> +
> >>> +static int
> >>> +regfix_detach(device_t dev)
> >>> +{
> >>> +
> >>> + /* This device is always present. */
> >>> + return (EBUSY);
> >>> +}
> >>> +
> >>> +static int
> >>> +regfix_attach(device_t dev)
> >>> +{
> >>> + struct regfix_softc * sc;
> >>> + int rv;
> >>> +
> >>> + sc = device_get_softc(dev);
> >>> + sc->dev = dev;
> >>> +
> >>> + /* Parse FDT data. */
> >>> + rv = regfix_parse_fdt(sc);
> >>> + if (rv != 0)
> >>> + return(ENXIO);
> >>> +
> >>> + /* Fill reset of init. */
> >>> + sc->init_def.reg_init_def.id = 1;
> >>> + sc->init_def.reg_init_def.flags = REGULATOR_FLAGS_STATIC;
> >>> +
> >>> + /* Try to get and configure GPIO. */
> >>> + rv = regfix_get_gpio(sc);
> >>> + if (rv != 0)
> >>> + return (bus_generic_attach(dev));
> >>> +
> >>> + /* Register regulator. */
> >>> + regnode_fixed_register(sc->dev, &sc->init_def);
> >>> + sc->attach_done = true;
> >>> +
> >>> + return (bus_generic_attach(dev));
> >>> +}
> >>> +
> >>> +static device_method_t regfix_methods[] = {
> >>> + /* Device interface */
> >>> + DEVMETHOD(device_probe, regfix_probe),
> >>> + DEVMETHOD(device_attach, regfix_attach),
> >>> + DEVMETHOD(device_detach, regfix_detach),
> >>> + /* Bus interface */
> >>> + DEVMETHOD(bus_new_pass, regfix_new_pass),
> >>> + /* Regdev interface */
> >>> + DEVMETHOD(regdev_map, regdev_default_ofw_map),
> >>> +
> >>> + DEVMETHOD_END
> >>> +};
> >>> +
> >>> +static devclass_t regfix_devclass;
> >>> +DEFINE_CLASS_0(regfix, regfix_driver, regfix_methods,
> >>> + sizeof(struct regfix_softc));
> >>> +EARLY_DRIVER_MODULE(regfix, simplebus, regfix_driver,
> >>> + regfix_devclass, 0, 0, BUS_PASS_BUS);
> >>> +
> >>> +#endif /* FDT */
> >>> diff --git a/freebsd/sys/dev/extres/regulator/regulator_fixed.h
> >>> b/freebsd/sys/dev/extres/regulator/regulator_fixed.h
> >>> new file mode 100644
> >>> index 00000000..5cc07516
> >>> --- /dev/null
> >>> +++ b/freebsd/sys/dev/extres/regulator/regulator_fixed.h
> >>> @@ -0,0 +1,44 @@
> >>> +/*-
> >>> + * Copyright 2016 Michal Meloun <mmel at FreeBSD.org>
> >>> + * All rights reserved.
> >>> + *
> >>> + * Redistribution and use in source and binary forms, with or without
> >>> + * modification, are permitted provided that the following conditions
> >>> + * are met:
> >>> + * 1. Redistributions of source code must retain the above copyright
> >>> + * notice, this list of conditions and the following disclaimer.
> >>> + * 2. Redistributions in binary form must reproduce the above copyright
> >>> + * notice, this list of conditions and the following disclaimer in the
> >>> + * documentation and/or other materials provided with the
> distribution.
> >>> + *
> >>> + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS
> ``AS
> >>> IS'' AND
> >>> + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
> LIMITED
> >>> TO, THE
> >>> + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
> >>> PARTICULAR PURPOSE
> >>> + * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR
> CONTRIBUTORS
> >>> BE LIABLE
> >>> + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
> >>> CONSEQUENTIAL
> >>> + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
> >>> SUBSTITUTE GOODS
> >>> + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
> >>> INTERRUPTION)
> >>> + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
> >>> CONTRACT, STRICT
> >>> + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
> ARISING
> >>> IN ANY WAY
> >>> + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
> >>> POSSIBILITY OF
> >>> + * SUCH DAMAGE.
> >>> + *
> >>> + * $FreeBSD$
> >>> + */
> >>> +
> >>> +#ifndef _DEV_EXTRES_REGULATOR_FIXED_H_
> >>> +#define _DEV_EXTRES_REGULATOR_FIXED_H_
> >>> +
> >>> +#include <dev/gpio/gpiobusvar.h>
> >>> +#include <dev/extres/regulator/regulator.h>
> >>> +
> >>> +struct regnode_fixed_init_def {
> >>> + struct regnode_init_def reg_init_def;
> >>> + bool gpio_open_drain;
> >>> + struct gpiobus_pin *gpio_pin;
> >>> +};
> >>> +
> >>> +int regnode_fixed_register(device_t dev,
> >>> + struct regnode_fixed_init_def *init_def);
> >>> +
> >>> +#endif /*_DEV_EXTRES_REGULATOR_FIXED_H_*/
> >>> diff --git a/freebsd/sys/dev/gpio/gpioregulator.c
> >>> b/freebsd/sys/dev/gpio/gpioregulator.c
> >>> new file mode 100644
> >>> index 00000000..6d05e52e
> >>> --- /dev/null
> >>> +++ b/freebsd/sys/dev/gpio/gpioregulator.c
> >>> @@ -0,0 +1,350 @@
> >>> +#include <machine/rtems-bsd-kernel-space.h>
> >>> +
> >>> +/*-
> >>> + * Copyright (c) 2016 Jared McNeill <jmcneill at invisible.ca>
> >>> + * All rights reserved.
> >>> + *
> >>> + * Redistribution and use in source and binary forms, with or without
> >>> + * modification, are permitted provided that the following conditions
> >>> + * are met:
> >>> + * 1. Redistributions of source code must retain the above copyright
> >>> + * notice, this list of conditions and the following disclaimer.
> >>> + * 2. Redistributions in binary form must reproduce the above copyright
> >>> + * notice, this list of conditions and the following disclaimer in the
> >>> + * documentation and/or other materials provided with the
> distribution.
> >>> + *
> >>> + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY
> EXPRESS
> >>> OR
> >>> + * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
> IMPLIED
> >>> WARRANTIES
> >>> + * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
> ARE
> >>> DISCLAIMED.
> >>> + * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
> INDIRECT,
> >>> + * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
> >>> (INCLUDING,
> >>> + * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
> >>> SERVICES;
> >>> + * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
> >>> HOWEVER CAUSED
> >>> + * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
> >>> LIABILITY,
> >>> + * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY
> WAY
> >>> + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
> >>> POSSIBILITY OF
> >>> + * SUCH DAMAGE.
> >>> + *
> >>> + * $FreeBSD$
> >>> + */
> >>> +
> >>> +/*
> >>> + * GPIO controlled regulators
> >>> + */
> >>> +
> >>> +#include <sys/cdefs.h>
> >>> +__FBSDID("$FreeBSD$");
> >>> +
> >>> +#include <sys/param.h>
> >>> +#include <sys/systm.h>
> >>> +#include <sys/bus.h>
> >>> +#include <sys/rman.h>
> >>> +#include <sys/kernel.h>
> >>> +#include <sys/module.h>
> >>> +#include <sys/gpio.h>
> >>> +
> >>> +#include <dev/ofw/ofw_bus.h>
> >>> +#include <dev/ofw/ofw_bus_subr.h>
> >>> +
> >>> +#include <dev/gpio/gpiobusvar.h>
> >>> +
> >>> +#include <dev/extres/regulator/regulator.h>
> >>> +
> >>> +#include <rtems/bsd/local/regdev_if.h>
> >>> +
> >>> +struct gpioregulator_state {
> >>> + int val;
> >>> + uint32_t mask;
> >>> +};
> >>> +
> >>> +struct gpioregulator_init_def {
> >>> + struct regnode_init_def reg_init_def;
> >>> + struct gpiobus_pin *enable_pin;
> >>> + int enable_pin_valid;
> >>> + int startup_delay_us;
> >>> + int nstates;
> >>> + struct gpioregulator_state *states;
> >>> + int npins;
> >>> + struct gpiobus_pin **pins;
> >>> +};
> >>> +
> >>> +struct gpioregulator_reg_sc {
> >>> + struct regnode *regnode;
> >>> + device_t base_dev;
> >>> + struct regnode_std_param *param;
> >>> + struct gpioregulator_init_def *def;
> >>> +};
> >>> +
> >>> +struct gpioregulator_softc {
> >>> + device_t dev;
> >>> + struct gpioregulator_reg_sc *reg_sc;
> >>> + struct gpioregulator_init_def init_def;
> >>> +};
> >>> +
> >>> +static int
> >>> +gpioregulator_regnode_init(struct regnode *regnode)
> >>> +{
> >>> + struct gpioregulator_reg_sc *sc;
> >>> + int error, n;
> >>> +
> >>> + sc = regnode_get_softc(regnode);
> >>> +
> >>> + if (sc->def->enable_pin_valid == 1) {
> >>> + error = gpio_pin_setflags(sc->def->enable_pin,
> >>> GPIO_PIN_OUTPUT);
> >>> + if (error != 0)
> >>> + return (error);
> >>> + }
> >>> +
> >>> + for (n = 0; n < sc->def->npins; n++) {
> >>> + error = gpio_pin_setflags(sc->def->pins[n],
> >>> GPIO_PIN_OUTPUT);
> >>> + if (error != 0)
> >>> + return (error);
> >>> + }
> >>> +
> >>> + return (0);
> >>> +}
> >>> +
> >>> +static int
> >>> +gpioregulator_regnode_enable(struct regnode *regnode, bool enable,
> int
> >>> *udelay)
> >>> +{
> >>> + struct gpioregulator_reg_sc *sc;
> >>> + bool active;
> >>> + int error;
> >>> +
> >>> + sc = regnode_get_softc(regnode);
> >>> +
> >>> + if (sc->def->enable_pin_valid == 1) {
> >>> + active = enable;
> >>> + if (!sc->param->enable_active_high)
> >>> + active = !active;
> >>> + error = gpio_pin_set_active(sc->def->enable_pin, active);
> >>> + if (error != 0)
> >>> + return (error);
> >>> + }
> >>> +
> >>> + *udelay = sc->def->startup_delay_us;
> >>> +
> >>> + return (0);
> >>> +}
> >>> +
> >>> +static int
> >>> +gpioregulator_regnode_set_voltage(struct regnode *regnode, int
> >>> min_uvolt,
> >>> + int max_uvolt, int *udelay)
> >>> +{
> >>> + struct gpioregulator_reg_sc *sc;
> >>> + const struct gpioregulator_state *state;
> >>> + int error, n;
> >>> +
> >>> + sc = regnode_get_softc(regnode);
> >>> + state = NULL;
> >>> +
> >>> + for (n = 0; n < sc->def->nstates; n++) {
> >>> + if (sc->def->states[n].val >= min_uvolt &&
> >>> + sc->def->states[n].val <= max_uvolt) {
> >>> + state = &sc->def->states[n];
> >>> + break;
> >>> + }
> >>> + }
> >>> + if (state == NULL)
> >>> + return (EINVAL);
> >>> +
> >>> + for (n = 0; n < sc->def->npins; n++) {
> >>> + error = gpio_pin_set_active(sc->def->pins[n],
> >>> + (state->mask >> n) & 1);
> >>> + if (error != 0)
> >>> + return (error);
> >>> + }
> >>> +
> >>> + *udelay = sc->def->startup_delay_us;
> >>> +
> >>> + return (0);
> >>> +}
> >>> +
> >>> +static int
> >>> +gpioregulator_regnode_get_voltage(struct regnode *regnode, int
> *uvolt)
> >>> +{
> >>> + struct gpioregulator_reg_sc *sc;
> >>> + uint32_t mask;
> >>> + int error, n;
> >>> + bool active;
> >>> +
> >>> + sc = regnode_get_softc(regnode);
> >>> + mask = 0;
> >>> +
> >>> + for (n = 0; n < sc->def->npins; n++) {
> >>> + error = gpio_pin_is_active(sc->def->pins[n], &active);
> >>> + if (error != 0)
> >>> + return (error);
> >>> + mask |= (active << n);
> >>> + }
> >>> +
> >>> + for (n = 0; n < sc->def->nstates; n++) {
> >>> + if (sc->def->states[n].mask == mask) {
> >>> + *uvolt = sc->def->states[n].val;
> >>> + return (0);
> >>> + }
> >>> + }
> >>> +
> >>> + return (EIO);
> >>> +}
> >>> +
> >>> +static regnode_method_t gpioregulator_regnode_methods[] = {
> >>> + /* Regulator interface */
> >>> + REGNODEMETHOD(regnode_init, gpioregulator_regnode_init),
> >>> + REGNODEMETHOD(regnode_enable,
> >>> gpioregulator_regnode_enable),
> >>> + REGNODEMETHOD(regnode_set_voltage,
> >>> gpioregulator_regnode_set_voltage),
> >>> + REGNODEMETHOD(regnode_get_voltage,
> >>> gpioregulator_regnode_get_voltage),
> >>> + REGNODEMETHOD_END
> >>> +};
> >>> +DEFINE_CLASS_1(gpioregulator_regnode,
> gpioregulator_regnode_class,
> >>> + gpioregulator_regnode_methods, sizeof(struct
> gpioregulator_reg_sc),
> >>> + regnode_class);
> >>> +
> >>> +static int
> >>> +gpioregulator_parse_fdt(struct gpioregulator_softc *sc)
> >>> +{
> >>> + uint32_t *pstates, mask;
> >>> + phandle_t node;
> >>> + ssize_t len;
> >>> + int error, n;
> >>> +
> >>> + node = ofw_bus_get_node(sc->dev);
> >>> + pstates = NULL;
> >>> + mask = 0;
> >>> +
> >>> + error = regulator_parse_ofw_stdparam(sc->dev, node,
> >>> + &sc->init_def.reg_init_def);
> >>> + if (error != 0)
> >>> + return (error);
> >>> +
> >>> + /* "states" property (required) */
> >>> + len = OF_getencprop_alloc_multi(node, "states", sizeof(*pstates),
> >>> + (void **)&pstates);
> >>> + if (len < 2) {
> >>> + device_printf(sc->dev, "invalid 'states' property\n");
> >>> + error = EINVAL;
> >>> + goto done;
> >>> + }
> >>> + sc->init_def.nstates = len / 2;
> >>> + sc->init_def.states = malloc(sc->init_def.nstates *
> >>> + sizeof(*sc->init_def.states), M_DEVBUF, M_WAITOK);
> >>> + for (n = 0; n < sc->init_def.nstates; n++) {
> >>> + sc->init_def.states[n].val = pstates[n * 2 + 0];
> >>> + sc->init_def.states[n].mask = pstates[n * 2 + 1];
> >>> + mask |= sc->init_def.states[n].mask;
> >>> + }
> >>> +
> >>> + /* "startup-delay-us" property (optional) */
> >>> + len = OF_getencprop(node, "startup-delay-us",
> >>> + &sc->init_def.startup_delay_us,
> >>> + sizeof(sc->init_def.startup_delay_us));
> >>> + if (len <= 0)
> >>> + sc->init_def.startup_delay_us = 0;
> >>> +
> >>> + /* "enable-gpio" property (optional) */
> >>> + error = gpio_pin_get_by_ofw_property(sc->dev, node, "enable-
> >>> gpio",
> >>> + &sc->init_def.enable_pin);
> >>> + if (error == 0)
> >>> + sc->init_def.enable_pin_valid = 1;
> >>> +
> >>> + /* "gpios" property */
> >>> + sc->init_def.npins = 32 - __builtin_clz(mask);
> >>> + sc->init_def.pins = malloc(sc->init_def.npins *
> >>> + sizeof(sc->init_def.pins), M_DEVBUF, M_WAITOK);
> >>> + for (n = 0; n < sc->init_def.npins; n++) {
> >>> + error = gpio_pin_get_by_ofw_idx(sc->dev, node, n,
> >>> + &sc->init_def.pins[n]);
> >>> + if (error != 0) {
> >>> + device_printf(sc->dev, "cannot get pin %d\n", n);
> >>> + goto done;
> >>> + }
> >>> + }
> >>> +
> >>> +done:
> >>> + if (error != 0) {
> >>> + for (n = 0; n < sc->init_def.npins; n++) {
> >>> + if (sc->init_def.pins[n] != NULL)
> >>> + gpio_pin_release(sc->init_def.pins[n]);
> >>> + }
> >>> +
> >>> + free(sc->init_def.states, M_DEVBUF);
> >>> + free(sc->init_def.pins, M_DEVBUF);
> >>> +
> >>> + }
> >>> + OF_prop_free(pstates);
> >>> +
> >>> + return (error);
> >>> +}
> >>> +
> >>> +static int
> >>> +gpioregulator_probe(device_t dev)
> >>> +{
> >>> +
> >>> + if (!ofw_bus_is_compatible(dev, "regulator-gpio"))
> >>> + return (ENXIO);
> >>> +
> >>> + device_set_desc(dev, "GPIO controlled regulator");
> >>> + return (BUS_PROBE_GENERIC);
> >>> +}
> >>> +
> >>> +static int
> >>> +gpioregulator_attach(device_t dev)
> >>> +{
> >>> + struct gpioregulator_softc *sc;
> >>> + struct regnode *regnode;
> >>> + phandle_t node;
> >>> + int error;
> >>> +
> >>> + sc = device_get_softc(dev);
> >>> + sc->dev = dev;
> >>> + node = ofw_bus_get_node(dev);
> >>> +
> >>> + error = gpioregulator_parse_fdt(sc);
> >>> + if (error != 0) {
> >>> + device_printf(dev, "cannot parse parameters\n");
> >>> + return (ENXIO);
> >>> + }
> >>> + sc->init_def.reg_init_def.id = 1;
> >>> + sc->init_def.reg_init_def.ofw_node = node;
> >>> +
> >>> + regnode = regnode_create(dev, &gpioregulator_regnode_class,
> >>> + &sc->init_def.reg_init_def);
> >>> + if (regnode == NULL) {
> >>> + device_printf(dev, "cannot create regulator\n");
> >>> + return (ENXIO);
> >>> + }
> >>> +
> >>> + sc->reg_sc = regnode_get_softc(regnode);
> >>> + sc->reg_sc->regnode = regnode;
> >>> + sc->reg_sc->base_dev = dev;
> >>> + sc->reg_sc->param = regnode_get_stdparam(regnode);
> >>> + sc->reg_sc->def = &sc->init_def;
> >>> +
> >>> + regnode_register(regnode);
> >>> +
> >>> + return (0);
> >>> +}
> >>> +
> >>> +
> >>> +static device_method_t gpioregulator_methods[] = {
> >>> + /* Device interface */
> >>> + DEVMETHOD(device_probe, gpioregulator_probe),
> >>> + DEVMETHOD(device_attach, gpioregulator_attach),
> >>> +
> >>> + /* Regdev interface */
> >>> + DEVMETHOD(regdev_map, regdev_default_ofw_map),
> >>> +
> >>> + DEVMETHOD_END
> >>> +};
> >>> +
> >>> +static driver_t gpioregulator_driver = {
> >>> + "gpioregulator",
> >>> + gpioregulator_methods,
> >>> + sizeof(struct gpioregulator_softc),
> >>> +};
> >>> +
> >>> +static devclass_t gpioregulator_devclass;
> >>> +
> >>> +EARLY_DRIVER_MODULE(gpioregulator, simplebus,
> gpioregulator_driver,
> >>> + gpioregulator_devclass, 0, 0, BUS_PASS_INTERRUPT +
> >>> BUS_PASS_ORDER_LAST);
> >>> +MODULE_VERSION(gpioregulator, 1);
> >>> --
> >>> 2.16.4
> >>>
> >>> _______________________________________________
> >>> devel mailing list
> >>> devel at rtems.org
> >>> http://lists.rtems.org/mailman/listinfo/devel
> >
>
> --
> --------------------------------------------
> embedded brains GmbH
> Herr Christian Mauderer
> Dornierstr. 4
> D-82178 Puchheim
> Germany
> email: christian.mauderer at embedded-brains.de
> Phone: +49-89-18 94 741 - 18
> Fax: +49-89-18 94 741 - 08
> PGP: Public key available on request.
>
> Diese Nachricht ist keine geschäftliche Mitteilung im Sinne des EHUG.
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