+// SPDX-License-Identifier: GPL-2.0+
/*
* Copyright (C) 2014-2015 Samsung Electronics
* Przemyslaw Marczak <p.marczak@samsung.com>
- *
- * SPDX-License-Identifier: GPL-2.0+
*/
+
#include <common.h>
-#include <fdtdec.h>
#include <errno.h>
#include <dm.h>
+#include <log.h>
#include <dm/uclass-internal.h>
+#include <linux/delay.h>
#include <power/pmic.h>
#include <power/regulator.h>
-DECLARE_GLOBAL_DATA_PTR;
-
int regulator_mode(struct udevice *dev, struct dm_regulator_mode **modep)
{
struct dm_regulator_uclass_platdata *uc_pdata;
return ops->get_value(dev);
}
+static void regulator_set_value_ramp_delay(struct udevice *dev, int old_uV,
+ int new_uV, unsigned int ramp_delay)
+{
+ int delay = DIV_ROUND_UP(abs(new_uV - old_uV), ramp_delay);
+
+ debug("regulator %s: delay %u us (%d uV -> %d uV)\n", dev->name, delay,
+ old_uV, new_uV);
+
+ udelay(delay);
+}
+
int regulator_set_value(struct udevice *dev, int uV)
{
const struct dm_regulator_ops *ops = dev_get_driver_ops(dev);
struct dm_regulator_uclass_platdata *uc_pdata;
+ int ret, old_uV = uV, is_enabled = 0;
uc_pdata = dev_get_uclass_platdata(dev);
if (uc_pdata->min_uV != -ENODATA && uV < uc_pdata->min_uV)
if (!ops || !ops->set_value)
return -ENOSYS;
- return ops->set_value(dev, uV);
+ if (uc_pdata->ramp_delay) {
+ is_enabled = regulator_get_enable(dev);
+ old_uV = regulator_get_value(dev);
+ }
+
+ ret = ops->set_value(dev, uV);
+
+ if (!ret) {
+ if (uc_pdata->ramp_delay && old_uV > 0 && is_enabled)
+ regulator_set_value_ramp_delay(dev, old_uV, uV,
+ uc_pdata->ramp_delay);
+ }
+
+ return ret;
+}
+
+int regulator_set_suspend_value(struct udevice *dev, int uV)
+{
+ const struct dm_regulator_ops *ops = dev_get_driver_ops(dev);
+ struct dm_regulator_uclass_platdata *uc_pdata;
+
+ uc_pdata = dev_get_uclass_platdata(dev);
+ if (uc_pdata->min_uV != -ENODATA && uV < uc_pdata->min_uV)
+ return -EINVAL;
+ if (uc_pdata->max_uV != -ENODATA && uV > uc_pdata->max_uV)
+ return -EINVAL;
+
+ if (!ops->set_suspend_value)
+ return -ENOSYS;
+
+ return ops->set_suspend_value(dev, uV);
+}
+
+int regulator_get_suspend_value(struct udevice *dev)
+{
+ const struct dm_regulator_ops *ops = dev_get_driver_ops(dev);
+
+ if (!ops->get_suspend_value)
+ return -ENOSYS;
+
+ return ops->get_suspend_value(dev);
}
/*
return ops->set_current(dev, uA);
}
-bool regulator_get_enable(struct udevice *dev)
+int regulator_get_enable(struct udevice *dev)
{
const struct dm_regulator_ops *ops = dev_get_driver_ops(dev);
int regulator_set_enable(struct udevice *dev, bool enable)
{
const struct dm_regulator_ops *ops = dev_get_driver_ops(dev);
+ struct dm_regulator_uclass_platdata *uc_pdata;
+ int ret, old_enable = 0;
if (!ops || !ops->set_enable)
return -ENOSYS;
- return ops->set_enable(dev, enable);
+ uc_pdata = dev_get_uclass_platdata(dev);
+ if (!enable && uc_pdata->always_on)
+ return -EACCES;
+
+ if (uc_pdata->ramp_delay)
+ old_enable = regulator_get_enable(dev);
+
+ ret = ops->set_enable(dev, enable);
+ if (!ret) {
+ if (uc_pdata->ramp_delay && !old_enable && enable) {
+ int uV = regulator_get_value(dev);
+
+ if (uV > 0) {
+ regulator_set_value_ramp_delay(dev, 0, uV,
+ uc_pdata->ramp_delay);
+ }
+ }
+ }
+
+ return ret;
+}
+
+int regulator_set_enable_if_allowed(struct udevice *dev, bool enable)
+{
+ int ret;
+
+ ret = regulator_set_enable(dev, enable);
+ if (ret == -ENOSYS || ret == -EACCES)
+ return 0;
+
+ return ret;
+}
+
+int regulator_set_suspend_enable(struct udevice *dev, bool enable)
+{
+ const struct dm_regulator_ops *ops = dev_get_driver_ops(dev);
+
+ if (!ops->set_suspend_enable)
+ return -ENOSYS;
+
+ return ops->set_suspend_enable(dev, enable);
+}
+
+int regulator_get_suspend_enable(struct udevice *dev)
+{
+ const struct dm_regulator_ops *ops = dev_get_driver_ops(dev);
+
+ if (!ops->get_suspend_enable)
+ return -ENOSYS;
+
+ return ops->get_suspend_enable(dev);
}
int regulator_get_mode(struct udevice *dev)
for (ret = uclass_find_first_device(UCLASS_REGULATOR, &dev); dev;
ret = uclass_find_next_device(&dev)) {
- if (ret)
+ if (ret) {
+ debug("regulator %s, ret=%d\n", dev->name, ret);
continue;
+ }
uc_pdata = dev_get_uclass_platdata(dev);
if (!uc_pdata || strcmp(plat_name, uc_pdata->name))
return uclass_get_device_tail(dev, 0, devp);
}
- debug("%s: can't find: %s\n", __func__, plat_name);
+ debug("%s: can't find: %s, ret=%d\n", __func__, plat_name, ret);
return -ENODEV;
}
int ret = 0;
uc_pdata = dev_get_uclass_platdata(dev);
+
+ ret = regulator_set_suspend_enable(dev, uc_pdata->suspend_on);
+ if (!ret && uc_pdata->suspend_on) {
+ ret = regulator_set_suspend_value(dev, uc_pdata->suspend_uV);
+ if (!ret)
+ return ret;
+ }
+
if (!uc_pdata->always_on && !uc_pdata->boot_on)
return -EMEDIUMTYPE;
+ if (uc_pdata->type == REGULATOR_TYPE_FIXED)
+ return regulator_set_enable(dev, true);
+
if (uc_pdata->flags & REGULATOR_FLAG_AUTOSET_UV)
ret = regulator_set_value(dev, uc_pdata->min_uV);
+ if (uc_pdata->init_uV > 0)
+ ret = regulator_set_value(dev, uc_pdata->init_uV);
if (!ret && (uc_pdata->flags & REGULATOR_FLAG_AUTOSET_UA))
ret = regulator_set_current(dev, uc_pdata->min_uA);
if (devp)
*devp = dev;
if (ret) {
- debug("Can get the regulator: %s!", platname);
+ debug("Can get the regulator: %s (err=%d)\n", platname, ret);
return ret;
}
static int regulator_post_bind(struct udevice *dev)
{
struct dm_regulator_uclass_platdata *uc_pdata;
- int offset = dev_of_offset(dev);
- const void *blob = gd->fdt_blob;
const char *property = "regulator-name";
uc_pdata = dev_get_uclass_platdata(dev);
- if (!uc_pdata)
- return -ENXIO;
/* Regulator's mandatory constraint */
- uc_pdata->name = fdt_getprop(blob, offset, property, NULL);
+ uc_pdata->name = dev_read_string(dev, property);
if (!uc_pdata->name) {
- debug("%s: dev: %s has no property 'regulator-name'\n",
- __func__, dev->name);
- uc_pdata->name = fdt_get_name(blob, offset, NULL);
+ debug("%s: dev '%s' has no property '%s'\n",
+ __func__, dev->name, property);
+ uc_pdata->name = dev_read_name(dev);
if (!uc_pdata->name)
return -EINVAL;
}
if (regulator_name_is_unique(dev, uc_pdata->name))
return 0;
- debug("\"%s\" of dev: \"%s\", has nonunique value: \"%s\"",
+ debug("'%s' of dev: '%s', has nonunique value: '%s\n",
property, dev->name, uc_pdata->name);
return -EINVAL;
static int regulator_pre_probe(struct udevice *dev)
{
struct dm_regulator_uclass_platdata *uc_pdata;
- int offset = dev_of_offset(dev);
+ ofnode node;
uc_pdata = dev_get_uclass_platdata(dev);
if (!uc_pdata)
return -ENXIO;
/* Regulator's optional constraints */
- uc_pdata->min_uV = fdtdec_get_int(gd->fdt_blob, offset,
- "regulator-min-microvolt", -ENODATA);
- uc_pdata->max_uV = fdtdec_get_int(gd->fdt_blob, offset,
- "regulator-max-microvolt", -ENODATA);
- uc_pdata->min_uA = fdtdec_get_int(gd->fdt_blob, offset,
- "regulator-min-microamp", -ENODATA);
- uc_pdata->max_uA = fdtdec_get_int(gd->fdt_blob, offset,
- "regulator-max-microamp", -ENODATA);
- uc_pdata->always_on = fdtdec_get_bool(gd->fdt_blob, offset,
- "regulator-always-on");
- uc_pdata->boot_on = fdtdec_get_bool(gd->fdt_blob, offset,
- "regulator-boot-on");
+ uc_pdata->min_uV = dev_read_u32_default(dev, "regulator-min-microvolt",
+ -ENODATA);
+ uc_pdata->max_uV = dev_read_u32_default(dev, "regulator-max-microvolt",
+ -ENODATA);
+ uc_pdata->init_uV = dev_read_u32_default(dev, "regulator-init-microvolt",
+ -ENODATA);
+ uc_pdata->min_uA = dev_read_u32_default(dev, "regulator-min-microamp",
+ -ENODATA);
+ uc_pdata->max_uA = dev_read_u32_default(dev, "regulator-max-microamp",
+ -ENODATA);
+ uc_pdata->always_on = dev_read_bool(dev, "regulator-always-on");
+ uc_pdata->boot_on = dev_read_bool(dev, "regulator-boot-on");
+ uc_pdata->ramp_delay = dev_read_u32_default(dev, "regulator-ramp-delay",
+ 0);
+
+ node = dev_read_subnode(dev, "regulator-state-mem");
+ if (ofnode_valid(node)) {
+ uc_pdata->suspend_on = !ofnode_read_bool(node, "regulator-off-in-suspend");
+ if (ofnode_read_u32(node, "regulator-suspend-microvolt", &uc_pdata->suspend_uV))
+ uc_pdata->suspend_uV = uc_pdata->max_uV;
+ } else {
+ uc_pdata->suspend_on = true;
+ uc_pdata->suspend_uV = uc_pdata->max_uV;
+ }
/* Those values are optional (-ENODATA if unset) */
if ((uc_pdata->min_uV != -ENODATA) &&
(uc_pdata->min_uA == uc_pdata->max_uA))
uc_pdata->flags |= REGULATOR_FLAG_AUTOSET_UA;
+ if (uc_pdata->boot_on)
+ regulator_set_enable(dev, uc_pdata->boot_on);
+
return 0;
}
projects / oweals / u-boot.git / blobdiff