On 16/04/2019 11:56, Jagan Teki wrote:
sdmmc cd pin is configured as RK_FUNC_GPIO which is wrong and indeed failed to detect the sdcard on the board with below error
Card did not respond to voltage select!
So, fix it by replacing RK_FUNC_GPIO with RK_FUNC_1 which is already defined in rk3399.dts so make use of same like other boards.
I guess the U-Boot dwmmc driver doesn't support using a GPIO? The reason we do this for Linux is that the dedicated function is not compatible with runtime power management - once we see that no card is present and suspend the idle controller, the CD logic is also powered off and thus no longer capable of generating the interrupt necessary to wake everything up again. The GPIO function of the same pin, however, is in an always-on power domain so is able to do the right thing.
So it's not "wrong" as such, but this change should be fine for U-Boot as long as it never turns off PD_SD itself.
Robin.
Signed-off-by: Jagan Teki jagan@amarulasolutions.com
arch/arm/dts/rk3399-nanopi4.dtsi | 6 +----- 1 file changed, 1 insertion(+), 5 deletions(-)
diff --git a/arch/arm/dts/rk3399-nanopi4.dtsi b/arch/arm/dts/rk3399-nanopi4.dtsi index d325e11728..5dc8a8de16 100644 --- a/arch/arm/dts/rk3399-nanopi4.dtsi +++ b/arch/arm/dts/rk3399-nanopi4.dtsi @@ -521,10 +521,6 @@ };
sdmmc {
sdmmc0_det_l: sdmmc0-det-l {rockchip,pins = <0 RK_PA7 RK_FUNC_GPIO &pcfg_pull_up>;};- sdmmc0_pwr_h: sdmmc0-pwr-h { rockchip,pins = <0 RK_PA1 RK_FUNC_GPIO &pcfg_pull_none>; };
@@ -582,7 +578,7 @@ cd-gpios = <&gpio0 RK_PA7 GPIO_ACTIVE_LOW>; disable-wp; pinctrl-names = "default";
- pinctrl-0 = <&sdmmc_bus4 &sdmmc_clk &sdmmc_cmd &sdmmc0_det_l>;
- pinctrl-0 = <&sdmmc_bus4 &sdmmc_clk &sdmmc_cmd &sdmmc_cd>; sd-uhs-sdr104; vmmc-supply = <&vcc3v0_sd>; vqmmc-supply = <&vcc_sdio>;