diff options
| author | Guodong Xu | 2014-08-13 13:33:40 +0200 |
|---|---|---|
| committer | Mark Brown | 2014-08-16 23:55:42 +0200 |
| commit | 871f565055ed232e5751da18a331b73e8254adaf (patch) | |
| tree | 8aa03c6a83d1c5a675c64935b213c1c18035e49c /include/linux/regulator | |
| parent | regulator: core: factor out delay function from _regulator_do_enable (diff) | |
| download | kernel-qcow2-linux-871f565055ed232e5751da18a331b73e8254adaf.tar.gz kernel-qcow2-linux-871f565055ed232e5751da18a331b73e8254adaf.tar.xz kernel-qcow2-linux-871f565055ed232e5751da18a331b73e8254adaf.zip | |
regulator: core: add guard delay between calling regulator_disable and _enable
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>
Diffstat (limited to 'include/linux/regulator')
| -rw-r--r-- | include/linux/regulator/driver.h | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/include/linux/regulator/driver.h b/include/linux/regulator/driver.h index 4b628139a9cb..efe058f8f746 100644 --- a/include/linux/regulator/driver.h +++ b/include/linux/regulator/driver.h @@ -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 * |