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regulator: core: Add new API to poll for error conditions

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Regulator consumers can receive event notifications when
errors are reported to the driver, but currently, there is
no way for a regulator consumer to know when the error is over.

To allow a regulator consumer to poll for error conditions
add a new API: regulator_get_error_flags.

Signed-off-by: Axel Haslam <ahaslam@baylibre.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Axel Haslam
2016-11-03 12:11:42 +01:00
committed by Mark Brown
parent 1001354ca3
commit 1b5b422164
3 changed files with 63 additions and 0 deletions
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26
include/linux/regulator/consumer.h
View File

@@ -120,6 +120,25 @@ struct regmap;
#define REGULATOR_EVENT_PRE_DISABLE 0x400
#define REGULATOR_EVENT_ABORT_DISABLE 0x800
/*
* Regulator errors that can be queried using regulator_get_error_flags
*
* UNDER_VOLTAGE Regulator output is under voltage.
* OVER_CURRENT Regulator output current is too high.
* REGULATION_OUT Regulator output is out of regulation.
* FAIL Regulator output has failed.
* OVER_TEMP Regulator over temp.
*
* NOTE: These errors can be OR'ed together.
*/
#define REGULATOR_ERROR_UNDER_VOLTAGE BIT(1)
#define REGULATOR_ERROR_OVER_CURRENT BIT(2)
#define REGULATOR_ERROR_REGULATION_OUT BIT(3)
#define REGULATOR_ERROR_FAIL BIT(4)
#define REGULATOR_ERROR_OVER_TEMP BIT(5)
/**
* struct pre_voltage_change_data - Data sent with PRE_VOLTAGE_CHANGE event
*
@@ -237,6 +256,8 @@ int regulator_get_current_limit(struct regulator *regulator);
int regulator_set_mode(struct regulator *regulator, unsigned int mode);
unsigned int regulator_get_mode(struct regulator *regulator);
int regulator_get_error_flags(struct regulator *regulator,
unsigned int *flags);
int regulator_set_load(struct regulator *regulator, int load_uA);
int regulator_allow_bypass(struct regulator *regulator, bool allow);
@@ -477,6 +498,11 @@ static inline unsigned int regulator_get_mode(struct regulator *regulator)
return REGULATOR_MODE_NORMAL;
}
static inline int regulator_get_error_flags(struct regulator *regulator)
{
return -EINVAL;
}
static inline int regulator_set_load(struct regulator *regulator, int load_uA)
{
return REGULATOR_MODE_NORMAL;

4
include/linux/regulator/driver.h
View File

@@ -100,6 +100,7 @@ struct regulator_linear_range {
*
* @set_mode: Set the configured operating mode for the regulator.
* @get_mode: Get the configured operating mode for the regulator.
* @get_error_flags: Get the current error(s) for the regulator.
* @get_status: Return actual (not as-configured) status of regulator, as a
* REGULATOR_STATUS value (or negative errno)
* @get_optimum_mode: Get the most efficient operating mode for the regulator
@@ -169,6 +170,9 @@ struct regulator_ops {
int (*set_mode) (struct regulator_dev *, unsigned int mode);
unsigned int (*get_mode) (struct regulator_dev *);
/* retrieve current error flags on the regulator */
int (*get_error_flags)(struct regulator_dev *, unsigned int *flags);
/* Time taken to enable or set voltage on the regulator */
int (*enable_time) (struct regulator_dev *);
int (*set_ramp_delay) (struct regulator_dev *, int ramp_delay);