Re: [PATCH 1/9] pinctrl: rockchip: rk3188: Fix support for IOMUX_GPIO_ONLY flag

[Kever Yang]

On 2024/5/12 20:16, Jonas Karlman wrote:

GPIO0_A0-A7 on RK3188 is IOMUX_GPIO_ONLY, however, trying to set gpio
mux return an -ENOTSUPP error code. Fix this by validating using the mux
function type and not the iomux flag.

Based on Linux commit c4a532dee6b6 ("pinctrl: rockchip: handle first
half of rk3188-bank0 correctly").

Signed-off-by: Jonas Karlman <jo...@kwiboo.se>

Reviewed-by: Kever Yang <kever.y...@rock-chips.com>

Thanks,
- Kever

---
Based on the old Linux commit and TRM it looks like GPIO0_B0-B7 should
also be flagged as IOMUX_GPIO_ONLY.
---
  drivers/pinctrl/rockchip/pinctrl-rockchip-core.c | 2 +-
  1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/pinctrl/rockchip/pinctrl-rockchip-core.c 
b/drivers/pinctrl/rockchip/pinctrl-rockchip-core.c
index a423abcafb23..b6e2ab474d0f 100644
--- a/drivers/pinctrl/rockchip/pinctrl-rockchip-core.c
+++ b/drivers/pinctrl/rockchip/pinctrl-rockchip-core.c
@@ -189,7 +189,7 @@ static int rockchip_verify_mux(struct rockchip_pin_bank 
*bank,
        }

if (bank->iomux[iomux_num].type & IOMUX_GPIO_ONLY) {

-               if (mux != IOMUX_GPIO_ONLY) {
+               if (mux != RK_FUNC_GPIO) {
                        debug("pin %d only supports a gpio mux\n", pin);
                        return -ENOTSUPP;
                }