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pinctrl: at91: disable PD or PU before enabling PU or PD 

Disable Pull-Down or Pull-Up property before enabling Pull-Up or
Pull-Down, because the pin's Pull-Up and Pull-Down property is
mutually exclusive.

Signed-off-by: Wenyou Yang <wenyou.yang@atmel.com>
Acked-by: Nicolas Ferre <nicolas.ferre@atmel.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
This commit is contained in:
Wenyou Yang 2014-09-11 16:40:15 +02:00 committed by Linus Walleij
parent 7471725f61
commit 3d78427397
1 changed files with 6 additions and 0 deletions
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6
drivers/pinctrl/pinctrl-at91.c
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@ -371,6 +371,9 @@ static unsigned at91_mux_get_pullup(void __iomem *pio, unsigned pin)
static void at91_mux_set_pullup(void __iomem *pio, unsigned mask, bool on)
{
if (on)
writel_relaxed(mask, pio + PIO_PPDDR);
writel_relaxed(mask, pio + (on ? PIO_PUER : PIO_PUDR));
}
@ -499,6 +502,9 @@ static bool at91_mux_pio3_get_pulldown(void __iomem *pio, unsigned pin)
static void at91_mux_pio3_set_pulldown(void __iomem *pio, unsigned mask, bool is_on)
{
if (is_on)
__raw_writel(mask, pio + PIO_PUDR);
__raw_writel(mask, pio + (is_on ? PIO_PPDER : PIO_PPDDR));
}