xiaomi-sm8450/android_kernel_xiaomi_sm8450
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

regulator: core: add guard delay between calling regulator_disable and _enable

Browse Source 
Some regulator require a minimum delay between its disable and next enable.
This is to avoid damages when out-of-range frequent disable/enable of a
single regulator can bring to the regulator chip.

Add @off_on_delay to struct regulator_desc. Device drivers' can use this field
to set this guard time.

Add @last_off_jiffy to struct regulator_dev. When @off_on_delay is set by
driver, regulator core can store its last off (disable) time into this field.

Signed-off-by: Guodong Xu <guodong.xu@linaro.org>
Signed-off-by: Mark Brown <broonie@linaro.org>
This commit is contained in:
Guodong Xu
2014-08-13 19:33:40 +08:00
committed by Mark Brown
parent 79fd114161
commit 871f565055
2 changed files with 37 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

6
include/linux/regulator/driver.h
View File

@@ -238,6 +238,7 @@ enum regulator_type {
* @bypass_val_off: Disabling value for control when using regmap set_bypass
*
* @enable_time: Time taken for initial enable of regulator (in uS).
* @off_on_delay: guard time (in uS), before re-enabling a regulator
*/
struct regulator_desc {
const char *name;
@@ -276,6 +277,8 @@ struct regulator_desc {
unsigned int bypass_val_off;
unsigned int enable_time;
unsigned int off_on_delay;
};
/**
@@ -348,6 +351,9 @@ struct regulator_dev {
struct regulator_enable_gpio *ena_pin;
unsigned int ena_gpio_state:1;
/* time when this regulator was disabled last time */
unsigned long last_off_jiffy;
};
struct regulator_dev *