diff options
| author | Heiko Stübner <heiko@sntech.de> | 2014-03-26 00:57:52 +0100 |
|---|---|---|
| committer | Linus Walleij <linus.walleij@linaro.org> | 2014-04-14 09:39:33 +0200 |
| commit | c4a532dee6b6e433d267d76d643e62ab90ca9eb9 (patch) | |
| tree | cc4a58ffefe58e9eda1b84cc640fe504886cf4c7 /drivers/pinctrl/pinctrl-rockchip.c | |
| parent | 14797189b35e9ec4344eeb75bdca4120cba88b69 (diff) | |
| download | linux-c4a532dee6b6e433d267d76d643e62ab90ca9eb9.tar.bz2 | |
pinctrl: rockchip: handle first half of rk3188-bank0 correctly
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>
Diffstat (limited to 'drivers/pinctrl/pinctrl-rockchip.c')
| -rw-r--r-- | drivers/pinctrl/pinctrl-rockchip.c | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/drivers/pinctrl/pinctrl-rockchip.c b/drivers/pinctrl/pinctrl-rockchip.c index 2ac194370b73..96c60d230c13 100644 --- a/drivers/pinctrl/pinctrl-rockchip.c +++ b/drivers/pinctrl/pinctrl-rockchip.c @@ -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); |