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regulator: core: Add REGULATOR_EVENT_PRE_VOLTAGE_CHANGE (and ABORT)

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In some cases we need to know when a regulator is about to be changed.
Add a way for clients to be notified.  Note that for set_voltage() we
don't necessarily know what voltage we'll end up with, so we tell the
client what the range will be so they can prepare.

Signed-off-by: Heiko Stübner <heiko@sntech.de>
Signed-off-by: Doug Anderson <dianders@chromium.org>
Signed-off-by: Mark Brown <broonie+linaro@kernel.org>
This commit is contained in:
Heiko Stübner
2014-08-28 12:36:04 -07:00
committed by Mark Brown
parent 7d1311b93e
commit 7179569aeb
2 changed files with 76 additions and 7 deletions
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20
include/linux/regulator/consumer.h
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@@ -93,7 +93,12 @@ struct regmap;
* OVER_TEMP Regulator over temp.
* FORCE_DISABLE Regulator forcibly shut down by software.
* VOLTAGE_CHANGE Regulator voltage changed.
* Data passed is old voltage cast to (void *).
* DISABLE Regulator was disabled.
* PRE_VOLTAGE_CHANGE Regulator is about to have voltage changed.
* Data passed is "struct pre_voltage_change_data"
* ABORT_VOLTAGE_CHANGE Regulator voltage change failed for some reason.
* Data passed is old voltage cast to (void *).
*
* NOTE: These events can be OR'ed together when passed into handler.
*/
@@ -106,6 +111,21 @@ struct regmap;
#define REGULATOR_EVENT_FORCE_DISABLE 0x20
#define REGULATOR_EVENT_VOLTAGE_CHANGE 0x40
#define REGULATOR_EVENT_DISABLE 0x80
#define REGULATOR_EVENT_PRE_VOLTAGE_CHANGE 0x100
#define REGULATOR_EVENT_ABORT_VOLTAGE_CHANGE 0x200
/**
* struct pre_voltage_change_data - Data sent with PRE_VOLTAGE_CHANGE event
*
* @old_uV: Current voltage before change.
* @min_uV: Min voltage we'll change to.
* @max_uV: Max voltage we'll change to.
*/
struct pre_voltage_change_data {
unsigned long old_uV;
unsigned long min_uV;
unsigned long max_uV;
};
struct regulator;