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regulator: implement selector stepping

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Some regulators require that the requested voltage be reached gradually
by setting all or some of the intermediate values. Implement a new field
in the regulator description struct that allows users to specify the
number of selectors by which the regulator API should step when ramping
the voltage up/down.

Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
Link: https://lore.kernel.org/r/20190703161035.31808-2-brgl@bgdev.pl
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Bartosz Golaszewski
2019-07-03 18:10:34 +02:00
committed by Mark Brown
parent ba2bf340ad
commit 2da8d9473e
2 changed files with 69 additions and 0 deletions
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6
include/linux/regulator/driver.h
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@@ -286,6 +286,11 @@ enum regulator_type {
* @vsel_range_mask: Mask for register bitfield used for range selector
* @vsel_reg: Register for selector when using regulator_regmap_X_voltage_
* @vsel_mask: Mask for register bitfield used for selector
* @vsel_step: Specify the resolution of selector stepping when setting
* voltage. If 0, then no stepping is done (requested selector is
* set directly), if >0 then the regulator API will ramp the
* voltage up/down gradually each time increasing/decreasing the
* selector by the specified step value.
* @csel_reg: Register for current limit selector using regmap set_current_limit
* @csel_mask: Mask for register bitfield used for current limit selector
* @apply_reg: Register for initiate voltage change on the output when
@@ -360,6 +365,7 @@ struct regulator_desc {
unsigned int vsel_range_mask;
unsigned int vsel_reg;
unsigned int vsel_mask;
unsigned int vsel_step;
unsigned int csel_reg;
unsigned int csel_mask;
unsigned int apply_reg;