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regulator: Add support for ramp delay

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Changing voltage and enabling regulator might require delays so the
regulator stabilizes at expected level.

Add support for "regulator-ramp-delay" binding which can introduce
required time to both enabling the regulator and to changing the
voltage.

Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org>
Tested-by: Anand Moon <linux.amoon@gmail.com>
Signed-off-by: Minkyu Kang <mk7.kang@samsung.com>
This commit is contained in:
Krzysztof Kozlowski
2019-03-06 19:37:54 +01:00
committed by Minkyu Kang
parent fce8610060
commit e66d1cb3c2
3 changed files with 49 additions and 2 deletions
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2
include/power/regulator.h
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@@ -150,6 +150,7 @@ enum regulator_flag {
* @always_on* - bool type, true or false
* @boot_on* - bool type, true or false
* TODO(sjg@chromium.org): Consider putting the above two into @flags
* @ramp_delay - Time to settle down after voltage change (unit: uV/us)
* @flags: - flags value (see REGULATOR_FLAG_...)
* @name** - fdt regulator name - should be taken from the device tree
* ctrl_reg: - Control register offset used to enable/disable regulator
@@ -169,6 +170,7 @@ struct dm_regulator_uclass_platdata {
int max_uV;
int min_uA;
int max_uA;
unsigned int ramp_delay;
bool always_on;
bool boot_on;
const char *name;