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regulator: Add soft start support

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Some regulators support a "soft start" feature where the voltage
ramps up slowly when the regulator is enabled. Add an op
(set_soft_start) and a DT property + constraint to support this.

Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Stephen Boyd
2015-06-11 17:37:05 -07:00
committed by Mark Brown
parent 23c779b9f9
commit 57f66b7886
5 changed files with 15 additions and 0 deletions
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include/linux/regulator/machine.h
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@@ -142,6 +142,7 @@ struct regulation_constraints {
unsigned boot_on:1; /* bootloader/firmware enabled regulator */
unsigned apply_uV:1; /* apply uV constraint if min == max */
unsigned ramp_disable:1; /* disable ramp delay */
unsigned soft_start:1; /* ramp voltage slowly */
unsigned pull_down:1; /* pull down resistor when regulator off */
};