| From | Kamal Mostafa <> | Subject | [PATCH 3.13.y-ckt 102/108] pinctrl: bcm2835: Fix initial value for direction_output | Date | Fri, 22 Jan 2016 15:29:55 -0800 |
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3.13.11-ckt33 -stable review patch. If anyone has any objections, please let me know.
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From: Stefan Wahren <stefan.wahren@i2se.com>
commit 4c02cba18cc9de672a554ddda4f23dec8cb4b48e upstream.
Currently the provided initial value for bcm2835_gpio_direction_output has no effect. So fix this issue by changing the value before changing the GPIO direction. As a result we need to move the function below bcm2835_gpio_set.
Suggested-by: Martin Sperl <kernel@martin.sperl.org> Signed-off-by: Stefan Wahren <stefan.wahren@i2se.com> Acked-by: Eric Anholt <eric@anholt.net> Acked-by: Stephen Warren <swarren@wwwdotorg.org> Fixes: e1b2dc70cd5b ("pinctrl: add bcm2835 driver") Signed-off-by: Linus Walleij <linus.walleij@linaro.org> [ luis: backported to 3.16: - file rename: drivers/pinctrl/bcm/pinctrl-bcm2835.c -> drivers/pinctrl/pinctrl-bcm2835.c ] Signed-off-by: Luis Henriques <luis.henriques@canonical.com> Signed-off-by: Kamal Mostafa <kamal@canonical.com> --- drivers/pinctrl/pinctrl-bcm2835.c | 13 +++++++------ 1 file changed, 7 insertions(+), 6 deletions(-)
diff --git a/drivers/pinctrl/pinctrl-bcm2835.c b/drivers/pinctrl/pinctrl-bcm2835.c index c05c1ef..64ee7bd 100644 --- a/drivers/pinctrl/pinctrl-bcm2835.c +++ b/drivers/pinctrl/pinctrl-bcm2835.c @@ -352,12 +352,6 @@ static int bcm2835_gpio_get(struct gpio_chip *chip, unsigned offset) return bcm2835_gpio_get_bit(pc, GPLEV0, offset); } -static int bcm2835_gpio_direction_output(struct gpio_chip *chip, - unsigned offset, int value) -{ - return pinctrl_gpio_direction_output(chip->base + offset); -} - static void bcm2835_gpio_set(struct gpio_chip *chip, unsigned offset, int value) { struct bcm2835_pinctrl *pc = dev_get_drvdata(chip->dev); @@ -365,6 +359,13 @@ static void bcm2835_gpio_set(struct gpio_chip *chip, unsigned offset, int value) bcm2835_gpio_set_bit(pc, value ? GPSET0 : GPCLR0, offset); } +static int bcm2835_gpio_direction_output(struct gpio_chip *chip, + unsigned offset, int value) +{ + bcm2835_gpio_set(chip, offset, value); + return pinctrl_gpio_direction_output(chip->base + offset); +} + static int bcm2835_gpio_to_irq(struct gpio_chip *chip, unsigned offset) { struct bcm2835_pinctrl *pc = dev_get_drvdata(chip->dev); -- 1.9.1
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