[PATCH rtems-libbsd v2 06/14] regulator: Import from FreeBSD.
Christian Mauderer
christian.mauderer at embedded-brains.de
Fri Apr 17 07:16:39 UTC 2020
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
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