[PATCH libbsd 04/11] regulator: Import from FreeBSD.
Christian Mauderer
christian.mauderer at embedded-brains.de
Thu Apr 2 14:42:38 UTC 2020
Update #3869.
---
freebsd/sys/dev/extres/regulator/regulator.c | 1196 ++++++++++++++++++++
freebsd/sys/dev/extres/regulator/regulator.h | 150 +++
freebsd/sys/dev/extres/regulator/regulator_bus.c | 89 ++
freebsd/sys/dev/extres/regulator/regulator_fixed.c | 501 ++++++++
freebsd/sys/dev/extres/regulator/regulator_fixed.h | 44 +
freebsd/sys/dev/gpio/gpioregulator.c | 350 ++++++
6 files changed, 2330 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..588d87d5
--- /dev/null
+++ b/freebsd/sys/dev/extres/regulator/regulator.c
@@ -0,0 +1,1196 @@
+#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_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_shutdown(void *dummy);
+
+/*
+ * Regulator controller methods.
+ */
+static regnode_method_t regnode_methods[] = {
+ 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_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_shutdown, SI_SUB_LAST, SI_ORDER_ANY, regulator_shutdown,
+ NULL);
+
+/*
+ * 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;
+
+ REG_TOPO_SLOCK();
+ TUNABLE_INT_FETCH("hw.regulator.disable_unused", &disable);
+ TAILQ_FOREACH(entry, ®node_list, reglist_link) {
+ if (!entry->std_param.always_on && disable) {
+ if (bootverbose)
+ printf("regulator: shutting down %s\n",
+ entry->name);
+ ret = regnode_status(entry, &status);
+ if (ret == 0 && status == REGULATOR_STATUS_ENABLED)
+ regnode_stop(entry, 0);
+ }
+ }
+ 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_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);
+}
+
+/* ----------------------------------------------------------------------------
+ *
+ * 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);
+}
+
+#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);
+}
+
+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 (ENXIO);
+
+ /* 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..0e5bbe1e
--- /dev/null
+++ b/freebsd/sys/dev/extres/regulator/regulator.h
@@ -0,0 +1,150 @@
+/*-
+ * 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);
+#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);
+
+#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..a0eb17c9
--- /dev/null
+++ b/freebsd/sys/dev/extres/regulator/regulator_fixed.c
@@ -0,0 +1,501 @@
+#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_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;
+ bool enable;
+ 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;
+ enable = sc->param->boot_on || sc->param->always_on;
+ 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);
+ }
+ 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
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