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authorMark Brown <broonie@opensource.wolfsonmicro.com>2009-07-21 16:00:23 +0100
committerLiam Girdwood <lrg@slimlogic.co.uk>2009-09-22 13:32:38 +0100
commit5ffbd136e6c51c8d1eec7a4a0c5d2180c81aea30 (patch)
tree1281ca42478aea061ba5de5be045e2361cd282d5 /include/linux/regulator
parentc1b60873ca2078bfca94b73bc88ef1c5adcc928b (diff)
downloadop-kernel-dev-5ffbd136e6c51c8d1eec7a4a0c5d2180c81aea30.zip
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regulator: Add regulator_get_exclusive() API
Some consumers require complete control of the regulator and can't tolerate sharing it with other consumers, most commonly because they need to have the regulator actually disabled so can't have other consumers forcing it on. This new regulator_get_exclusive() API call allows these consumers to explicitly request this, documenting the assumptions that they are making. In order to simplify coding of such consumers the use count for regulators they request is forced to match the enabled state of the regulator when it is requested. This is not possible for consumers which can share regulators due to the need to keep track of the ownership of use counts. A new API call is used rather than an additional argument to the existing regulator_get() in order to avoid merge headaches with driver code in other trees. Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com> Signed-off-by: Liam Girdwood <lrg@slimlogic.co.uk>
Diffstat (limited to 'include/linux/regulator')
-rw-r--r--include/linux/regulator/consumer.h2
-rw-r--r--include/linux/regulator/driver.h2
2 files changed, 4 insertions, 0 deletions
diff --git a/include/linux/regulator/consumer.h b/include/linux/regulator/consumer.h
index 277f4b9..976b57b 100644
--- a/include/linux/regulator/consumer.h
+++ b/include/linux/regulator/consumer.h
@@ -125,6 +125,8 @@ struct regulator_bulk_data {
/* regulator get and put */
struct regulator *__must_check regulator_get(struct device *dev,
const char *id);
+struct regulator *__must_check regulator_get_exclusive(struct device *dev,
+ const char *id);
void regulator_put(struct regulator *regulator);
/* regulator output control and status */
diff --git a/include/linux/regulator/driver.h b/include/linux/regulator/driver.h
index ce1be70..73c9cd6 100644
--- a/include/linux/regulator/driver.h
+++ b/include/linux/regulator/driver.h
@@ -162,6 +162,8 @@ struct regulator_desc {
struct regulator_dev {
struct regulator_desc *desc;
int use_count;
+ int open_count;
+ int exclusive;
/* lists we belong to */
struct list_head list; /* list of all regulators */
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