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u-boot/drivers/power/regulator/regulator-uclass.c
Tom Rini 83d290c56f SPDX: Convert all of our single license tags to Linux Kernel style 
When U-Boot started using SPDX tags we were among the early adopters and
there weren't a lot of other examples to borrow from.  So we picked the
area of the file that usually had a full license text and replaced it
with an appropriate SPDX-License-Identifier: entry.  Since then, the
Linux Kernel has adopted SPDX tags and they place it as the very first
line in a file (except where shebangs are used, then it's second line)
and with slightly different comment styles than us.

In part due to community overlap, in part due to better tag visibility
and in part for other minor reasons, switch over to that style.

This commit changes all instances where we have a single declared
license in the tag as both the before and after are identical in tag
contents.  There's also a few places where I found we did not have a tag
and have introduced one.

Signed-off-by: Tom Rini <trini@konsulko.com>
2018-05-07 09:34:12 -04:00

371 lines
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// SPDX-License-Identifier: GPL-2.0+
/*
* Copyright (C) 2014-2015 Samsung Electronics
* Przemyslaw Marczak <p.marczak@samsung.com>
*/
#include <common.h>
#include <errno.h>
#include <dm.h>
#include <dm/uclass-internal.h>
#include <power/pmic.h>
#include <power/regulator.h>
int regulator_mode(struct udevice *dev, struct dm_regulator_mode **modep)
{
struct dm_regulator_uclass_platdata *uc_pdata;
*modep = NULL;
uc_pdata = dev_get_uclass_platdata(dev);
if (!uc_pdata)
return -ENXIO;
*modep = uc_pdata->mode;
return uc_pdata->mode_count;
}
int regulator_get_value(struct udevice *dev)
{
const struct dm_regulator_ops *ops = dev_get_driver_ops(dev);
if (!ops || !ops->get_value)
return -ENOSYS;
return ops->get_value(dev);
}
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;
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 || !ops->set_value)
return -ENOSYS;
return ops->set_value(dev, uV);
}
/*
* To be called with at most caution as there is no check
* before setting the actual voltage value.
*/
int regulator_set_value_force(struct udevice *dev, int uV)
{
const struct dm_regulator_ops *ops = dev_get_driver_ops(dev);
if (!ops || !ops->set_value)
return -ENOSYS;
return ops->set_value(dev, uV);
}
int regulator_get_current(struct udevice *dev)
{
const struct dm_regulator_ops *ops = dev_get_driver_ops(dev);
if (!ops || !ops->get_current)
return -ENOSYS;
return ops->get_current(dev);
}
int regulator_set_current(struct udevice *dev, int uA)
{
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_uA != -ENODATA && uA < uc_pdata->min_uA)
return -EINVAL;
if (uc_pdata->max_uA != -ENODATA && uA > uc_pdata->max_uA)
return -EINVAL;
if (!ops || !ops->set_current)
return -ENOSYS;
return ops->set_current(dev, uA);
}
int regulator_get_enable(struct udevice *dev)
{
const struct dm_regulator_ops *ops = dev_get_driver_ops(dev);
if (!ops || !ops->get_enable)
return -ENOSYS;
return ops->get_enable(dev);
}
int regulator_set_enable(struct udevice *dev, bool enable)
{
const struct dm_regulator_ops *ops = dev_get_driver_ops(dev);
if (!ops || !ops->set_enable)
return -ENOSYS;
return ops->set_enable(dev, enable);
}
int regulator_get_mode(struct udevice *dev)
{
const struct dm_regulator_ops *ops = dev_get_driver_ops(dev);
if (!ops || !ops->get_mode)
return -ENOSYS;
return ops->get_mode(dev);
}
int regulator_set_mode(struct udevice *dev, int mode)
{
const struct dm_regulator_ops *ops = dev_get_driver_ops(dev);
if (!ops || !ops->set_mode)
return -ENOSYS;
return ops->set_mode(dev, mode);
}
int regulator_get_by_platname(const char *plat_name, struct udevice **devp)
{
struct dm_regulator_uclass_platdata *uc_pdata;
struct udevice *dev;
int ret;
*devp = NULL;
for (ret = uclass_find_first_device(UCLASS_REGULATOR, &dev); dev;
ret = uclass_find_next_device(&dev)) {
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))
continue;
return uclass_get_device_tail(dev, 0, devp);
}
debug("%s: can't find: %s, ret=%d\n", __func__, plat_name, ret);
return -ENODEV;
}
int regulator_get_by_devname(const char *devname, struct udevice **devp)
{
return uclass_get_device_by_name(UCLASS_REGULATOR, devname, devp);
}
int device_get_supply_regulator(struct udevice *dev, const char *supply_name,
struct udevice **devp)
{
return uclass_get_device_by_phandle(UCLASS_REGULATOR, dev,
supply_name, devp);
}
int regulator_autoset(struct udevice *dev)
{
struct dm_regulator_uclass_platdata *uc_pdata;
int ret = 0;
uc_pdata = dev_get_uclass_platdata(dev);
if (!uc_pdata->always_on && !uc_pdata->boot_on)
return -EMEDIUMTYPE;
if (uc_pdata->flags & REGULATOR_FLAG_AUTOSET_UV)
ret = regulator_set_value(dev, uc_pdata->min_uV);
if (!ret && (uc_pdata->flags & REGULATOR_FLAG_AUTOSET_UA))
ret = regulator_set_current(dev, uc_pdata->min_uA);
if (!ret)
ret = regulator_set_enable(dev, true);
return ret;
}
static void regulator_show(struct udevice *dev, int ret)
{
struct dm_regulator_uclass_platdata *uc_pdata;
uc_pdata = dev_get_uclass_platdata(dev);
printf("%s@%s: ", dev->name, uc_pdata->name);
if (uc_pdata->flags & REGULATOR_FLAG_AUTOSET_UV)
printf("set %d uV", uc_pdata->min_uV);
if (uc_pdata->flags & REGULATOR_FLAG_AUTOSET_UA)
printf("; set %d uA", uc_pdata->min_uA);
printf("; enabling");
if (ret)
printf(" (ret: %d)", ret);
printf("\n");
}
int regulator_autoset_by_name(const char *platname, struct udevice **devp)
{
struct udevice *dev;
int ret;
ret = regulator_get_by_platname(platname, &dev);
if (devp)
*devp = dev;
if (ret) {
debug("Can get the regulator: %s (err=%d)\n", platname, ret);
return ret;
}
return regulator_autoset(dev);
}
int regulator_list_autoset(const char *list_platname[],
struct udevice *list_devp[],
bool verbose)
{
struct udevice *dev;
int error = 0, i = 0, ret;
while (list_platname[i]) {
ret = regulator_autoset_by_name(list_platname[i], &dev);
if (ret != -EMEDIUMTYPE && verbose)
regulator_show(dev, ret);
if (ret & !error)
error = ret;
if (list_devp)
list_devp[i] = dev;
i++;
}
return error;
}
static bool regulator_name_is_unique(struct udevice *check_dev,
const char *check_name)
{
struct dm_regulator_uclass_platdata *uc_pdata;
struct udevice *dev;
int check_len = strlen(check_name);
int ret;
int len;
for (ret = uclass_find_first_device(UCLASS_REGULATOR, &dev); dev;
ret = uclass_find_next_device(&dev)) {
if (ret || dev == check_dev)
continue;
uc_pdata = dev_get_uclass_platdata(dev);
len = strlen(uc_pdata->name);
if (len != check_len)
continue;
if (!strcmp(uc_pdata->name, check_name))
return false;
}
return true;
}
static int regulator_post_bind(struct udevice *dev)
{
struct dm_regulator_uclass_platdata *uc_pdata;
const char *property = "regulator-name";
uc_pdata = dev_get_uclass_platdata(dev);
/* Regulator's mandatory constraint */
uc_pdata->name = dev_read_string(dev, property);
if (!uc_pdata->name) {
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\n",
property, dev->name, uc_pdata->name);
return -EINVAL;
}
static int regulator_pre_probe(struct udevice *dev)
{
struct dm_regulator_uclass_platdata *uc_pdata;
uc_pdata = dev_get_uclass_platdata(dev);
if (!uc_pdata)
return -ENXIO;
/* Regulator's optional constraints */
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->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");
/* Those values are optional (-ENODATA if unset) */
if ((uc_pdata->min_uV != -ENODATA) &&
(uc_pdata->max_uV != -ENODATA) &&
(uc_pdata->min_uV == uc_pdata->max_uV))
uc_pdata->flags |= REGULATOR_FLAG_AUTOSET_UV;
/* Those values are optional (-ENODATA if unset) */
if ((uc_pdata->min_uA != -ENODATA) &&
(uc_pdata->max_uA != -ENODATA) &&
(uc_pdata->min_uA == uc_pdata->max_uA))
uc_pdata->flags |= REGULATOR_FLAG_AUTOSET_UA;
return 0;
}
int regulators_enable_boot_on(bool verbose)
{
struct udevice *dev;
struct uclass *uc;
int ret;
ret = uclass_get(UCLASS_REGULATOR, &uc);
if (ret)
return ret;
for (uclass_first_device(UCLASS_REGULATOR, &dev);
dev;
uclass_next_device(&dev)) {
ret = regulator_autoset(dev);
if (ret == -EMEDIUMTYPE) {
ret = 0;
continue;
}
if (verbose)
regulator_show(dev, ret);
if (ret == -ENOSYS)
ret = 0;
}
return ret;
}
UCLASS_DRIVER(regulator) = {
.id = UCLASS_REGULATOR,
.name = "regulator",
.post_bind = regulator_post_bind,
.pre_probe = regulator_pre_probe,
.per_device_platdata_auto_alloc_size =
sizeof(struct dm_regulator_uclass_platdata),
};
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