[PATCH v6 04/13] power: regulator: Add driver voltage clamp callback
Linus Walleij <[email protected]>
| Newsgroups | org.u-boot-project.lists.u-boot |
|---|---|
| Message-ID | <[email protected]> |
The regulator core can clamp a requested voltage against device tree constraints, but it cannot account for discrete values supported by the hardware. Add an optional set_value_clamp() driver callback. Apply the regulator constraints in the core before asking the driver to select the closest supported voltage in the resulting range. Drivers without the callback retain the existing behavior. Signed-off-by: Linus Walleij <[email protected]> --- drivers/power/regulator/regulator-uclass.c | 2 ++ include/power/regulator.h | 6 ++++++ 2 files changed, 8 insertions(+) diff --git a/drivers/power/regulator/regulator-uclass.c b/drivers/power/regulator/regulator-uclass.c index 0f5ba51ad6c2..388c888546a6 100644 --- a/drivers/power/regulator/regulator-uclass.c +++ b/drivers/power/regulator/regulator-uclass.c @@ -134,6 +134,8 @@ int regulator_set_value_clamp(struct udevice *dev, if (uc_pdata->max_uV != -ENODATA) max_uV = min(max_uV, uc_pdata->max_uV); uV = clamp(target_uV, min_uV, max_uV); + if (ops->set_value_clamp) + return ops->set_value_clamp(dev, min_uV, uV, max_uV); return regulator_set_value(dev, uV); } diff --git a/include/power/regulator.h b/include/power/regulator.h index 8d4d1450b905..f6838cb4605d 100644 --- a/include/power/regulator.h +++ b/include/power/regulator.h @@ -195,13 +195,19 @@ struct dm_regulator_ops { * The regulator output value function calls operates on a micro Volts. * * get/set_value - get/set output value of the given output number + * set_value_clamp - set the closest supported value within a range * @dev - regulator device * Sets: * @uV - set the output value [micro Volts] + * @min_uV - minimum acceptable output value [micro Volts] + * @target_uV - preferred output value [micro Volts] + * @max_uV - maximum acceptable output value [micro Volts] * @return output value [uV] on success or negative errno if fail. */ int (*get_value)(struct udevice *dev); int (*set_value)(struct udevice *dev, int uV); + int (*set_value_clamp)(struct udevice *dev, int min_uV, + int target_uV, int max_uV); /** * The regulator suspend output value function calls operates -- 2.55.0