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regulator: add get_status()

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Based on previous LKML discussions:

 * Update docs for regulator sysfs class attributes to highlight
   the fact that all current attributes are intended to be control
   inputs, including notably "state" and "opmode" which previously
   implied otherwise.

 * Define a new regulator driver get_status() method, which is the
   first method reporting regulator outputs instead of inputs.
   It can report on/off and error status; or instead of simply
   "on", report the actual operating mode.

For the moment, this is a sysfs-only interface, not accessible to
regulator clients.  Such clients can use the current notification
interfaces to detect errors, if the regulator reports them.

Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Liam Girdwood <lrg@slimlogic.co.uk>
This commit is contained in:
David Brownell
2009-01-14 23:03:17 -08:00
committed by Liam Girdwood
parent 93e14baa44
commit 853116a105
3 changed files with 111 additions and 9 deletions
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17
include/linux/regulator/driver.h
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@@ -21,6 +21,17 @@
struct regulator_dev;
struct regulator_init_data;
enum regulator_status {
REGULATOR_STATUS_OFF,
REGULATOR_STATUS_ON,
REGULATOR_STATUS_ERROR,
/* fast/normal/idle/standby are flavors of "on" */
REGULATOR_STATUS_FAST,
REGULATOR_STATUS_NORMAL,
REGULATOR_STATUS_IDLE,
REGULATOR_STATUS_STANDBY,
};
/**
* struct regulator_ops - regulator operations.
*
@@ -72,6 +83,12 @@ struct regulator_ops {
int (*set_mode) (struct regulator_dev *, unsigned int mode);
unsigned int (*get_mode) (struct regulator_dev *);
/* report regulator status ... most other accessors report
* control inputs, this reports results of combining inputs
* from Linux (and other sources) with the actual load.
*/
int (*get_status)(struct regulator_dev *);
/* get most efficient regulator operating mode for load */
unsigned int (*get_optimum_mode) (struct regulator_dev *, int input_uV,
int output_uV, int load_uA);