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authorGuodong Xu <guodong.xu@linaro.org>2014-08-13 19:33:40 +0800
committerMark Brown <broonie@linaro.org>2014-08-16 16:55:42 -0500
commit871f565055ed232e5751da18a331b73e8254adaf (patch)
tree8aa03c6a83d1c5a675c64935b213c1c18035e49c /include/linux/regulator
parent79fd114161a764dfa456191af89358b3f5201c87 (diff)
downloadblackbird-op-linux-871f565055ed232e5751da18a331b73e8254adaf.tar.gz
blackbird-op-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.h6
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 *
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