Commit acaf6ffe authored Nov 10, 2010 by Bengt Jonsson Committed by Liam Girdwood Jan 12, 2011

regulator: enable supply regulator only when use count is zero



Supply regulators are disabled only when the last
reference count is removed on the child regulator
(the use count goes from 1 to 0). This patch changes
the behaviour of enable so the supply regulator is
enabled only when the use count of the child
regulator goes from 0 to 1.

Signed-off-by: Bengt Jonsson <bengt.g.jonsson@stericsson.com>
Acked-by: Linus Walleij <linus.walleij@stericsson.com>
Acked-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: Liam Girdwood <lrg@slimlogic.co.uk>

parent 02fa3ec0

drivers/regulator/core.c

+11 −9

Original line number	Diff line number	Diff line
		@@ -1273,6 +1273,7 @@ static int _regulator_enable(struct regulator_dev *rdev)
		{
		int ret, delay;

		if (rdev->use_count == 0) {
		/* do we need to enable the supply regulator first */
		if (rdev->supply) {
		mutex_lock(&rdev->supply->mutex);
		@@ -1284,6 +1285,7 @@ static int _regulator_enable(struct regulator_dev *rdev)
		return ret;
		}
		}
		}

		/* check voltage and requested load before enabling */
		if (rdev->constraints &&