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authorMaxime Ripard <maxime.ripard@free-electrons.com>2013-04-29 16:07:18 +0200
committerLinus Walleij <linus.walleij@linaro.org>2013-05-20 20:14:43 +0200
commit90dae4ebf03063a70d992aad00d5f5a607c31db8 (patch)
tree4e392e7ca7898bebbc75f2fe34cc3630cd6b2ffd /drivers/gpio
parent2519f9abced15b4327f03d7b8666827517582c29 (diff)
downloadlinux-90dae4ebf03063a70d992aad00d5f5a607c31db8.tar.bz2
gpio: mxs: Use set and clear capabilities of the gpio controller
The current driver doesn't use the set and clear registers found on the mxs gpio controller. This leads the generic gpio controller to be using some internal value to avoid looking up the value stored in the registers, making it behave pretty much like a cache. This raises some coherency problem when a gpio is not modified by the gpio controller, while it can easily be fixed by using the set and clear registers. Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com> Acked-by: Shawn Guo <shawn.guo@linaro.org> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Diffstat (limited to 'drivers/gpio')
-rw-r--r--drivers/gpio/gpio-mxs.c3
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/gpio/gpio-mxs.c b/drivers/gpio/gpio-mxs.c
index 25000b0f8453..f8e6af20dfbf 100644
--- a/drivers/gpio/gpio-mxs.c
+++ b/drivers/gpio/gpio-mxs.c
@@ -326,7 +326,8 @@ static int mxs_gpio_probe(struct platform_device *pdev)
err = bgpio_init(&port->bgc, &pdev->dev, 4,
port->base + PINCTRL_DIN(port),
- port->base + PINCTRL_DOUT(port), NULL,
+ port->base + PINCTRL_DOUT(port) + MXS_SET,
+ port->base + PINCTRL_DOUT(port) + MXS_CLR,
port->base + PINCTRL_DOE(port), NULL, 0);
if (err)
goto out_irqdesc_free;