diff options
| author | David Wu <david.wu@rock-chips.com> | 2019-04-16 21:50:56 +0800 |
|---|---|---|
| committer | Kever Yang <kever.yang@rock-chips.com> | 2019-05-08 17:34:12 +0800 |
| commit | cd8f00ce08102d2dbb350c76bbb53f7b0f804b7d (patch) | |
| tree | 0b68a95f7046fd56a80506d8afe4343192614eda | |
| parent | 54e75702c48a9757e82cbe71176c0b5ddcf6a092 (diff) | |
pinctrl: rockchip: Special treatment for RK3288 gpio0 pins' iomux
RK3288 pmu_gpio0 iomux setting have no higher 16 writing corresponding
bits, need to read before write the register.
Signed-off-by: David Wu <david.wu@rock-chips.com>
Signed-off-by: Kever Yang <kever.yang@rock-chips.com>
| -rw-r--r-- | drivers/pinctrl/rockchip/pinctrl-rk3288.c | 10 |
1 files changed, 9 insertions, 1 deletions
diff --git a/drivers/pinctrl/rockchip/pinctrl-rk3288.c b/drivers/pinctrl/rockchip/pinctrl-rk3288.c index 1fa601d954..5040cd8f48 100644 --- a/drivers/pinctrl/rockchip/pinctrl-rk3288.c +++ b/drivers/pinctrl/rockchip/pinctrl-rk3288.c @@ -54,7 +54,15 @@ static int rk3288_set_mux(struct rockchip_pin_bank *bank, int pin, int mux) } } - data = (mask << (bit + 16)); + /* bank0 is special, there are no higher 16 bit writing bits. */ + if (bank->bank_num == 0) { + regmap_read(regmap, reg, &data); + data &= ~(mask << bit); + } else { + /* enable the write to the equivalent lower bits */ + data = (mask << (bit + 16)); + } + data |= (mux & mask) << bit; ret = regmap_write(regmap, reg, data); |