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power: regulator: Add support for regulator-force-boot-off

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Add support for regulator-force-boot-off DT property.
This property can be used by the board/device drivers for
turning off regulators on early init stages as pre-requisite
for the other components initialization.

Signed-off-by: Konstantin Porotchkin <kostap@marvell.com>
Signed-off-by: Stefan Roese <sr@denx.de>
Cc: Jaehoon Chung <jh80.chung@samsung.com>
Cc: Simon Glass <sjg@chromium.org>
Reviewed-by: Jaehoon Chung <jh80.chung@samsung.com>
This commit is contained in:
Konstantin Porotchkin
2017-05-29 15:59:38 +03:00
committed by Stefan Roese
parent 939c4934c8
commit fec8c900c8
2 changed files with 61 additions and 0 deletions
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38
drivers/power/regulator/regulator-uclass.c
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@@ -311,6 +311,17 @@ int regulator_autoset(struct udevice *dev)
return ret;
}
int regulator_unset(struct udevice *dev)
{
struct dm_regulator_uclass_plat *uc_pdata;
uc_pdata = dev_get_uclass_plat(dev);
if (uc_pdata && uc_pdata->force_off)
return regulator_set_enable(dev, false);
return -EMEDIUMTYPE;
}
static void regulator_show(struct udevice *dev, int ret)
{
struct dm_regulator_uclass_plat *uc_pdata;
@@ -443,6 +454,7 @@ static int regulator_pre_probe(struct udevice *dev)
uc_pdata->boot_on = dev_read_bool(dev, "regulator-boot-on");
uc_pdata->ramp_delay = dev_read_u32_default(dev, "regulator-ramp-delay",
0);
uc_pdata->force_off = dev_read_bool(dev, "regulator-force-boot-off");
node = dev_read_subnode(dev, "regulator-state-mem");
if (ofnode_valid(node)) {
@@ -495,6 +507,32 @@ int regulators_enable_boot_on(bool verbose)
return ret;
}
int regulators_enable_boot_off(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_unset(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",