power: regulator: Add support for regulator-force-boot-off
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>
diff --git a/drivers/power/regulator/regulator-uclass.c b/drivers/power/regulator/regulator-uclass.c
index 4d2e730..fac9606 100644
--- a/drivers/power/regulator/regulator-uclass.c
+++ b/drivers/power/regulator/regulator-uclass.c
@@ -311,6 +311,17 @@
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 @@
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 @@
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",