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pinctrl: rockchip: handle first half of rk3188-bank0 correctly

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The first half of pinbank 0 only has one muxing function (as gpios) and
does not have a special mux-register.

Therefore ensure that no other mux function can be selected and also do not
write to a non-existent register.

Signed-off-by: Heiko Stuebner <heiko@sntech.de>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
This commit is contained in:
Heiko Stübner 2014-03-26 00:57:52 +01:00 committed by Linus Walleij
parent 14797189b3
commit c4a532dee6
1 changed files with 14 additions and 0 deletions
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14
drivers/pinctrl/pinctrl-rockchip.c
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@ -350,6 +350,20 @@ static int rockchip_set_mux(struct rockchip_pin_bank *bank, int pin, int mux)
u8 bit;
u32 data;
/*
* The first 16 pins of rk3188_bank0 are always gpios and do not have
* a mux register at all.
*/
if (bank->bank_type == RK3188_BANK0 && pin < 16) {
if (mux != RK_FUNC_GPIO) {
dev_err(info->dev,
"pin %d only supports a gpio mux\n", pin);
return -ENOTSUPP;
} else {
return 0;
}
}
dev_dbg(info->dev, "setting mux of GPIO%d-%d to %d\n",
bank->bank_num, pin, mux);