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| author | Wadim Egorov <w.egorov@phytec.de> | 2016-01-21 13:57:13 +0100 |
|---|---|---|
| committer | Heiko Stuebner <heiko@sntech.de> | 2016-01-25 09:17:32 +0100 |
| commit | 296759c91e60c7fc84708d926161ee928697b0eb (patch) | |
| tree | 243807e510fe98ada03a6f1bcbc19d9922e2148e /arch/arm/boot/dts/rk3288-firefly.dtsi | |
| parent | dt-bindings: rockchip-dw-mshc: add RK3368 dw-mshc description (diff) | |
| download | linux-296759c91e60c7fc84708d926161ee928697b0eb.tar.xz linux-296759c91e60c7fc84708d926161ee928697b0eb.zip | |
ARM: dts: rockchip: Bump sd card pin drive strength up on firefly boards
It seems some firefly boards need 12mA drive strength for sdmmc.
Using 4mA/8mA drive strength will cause the kernel to fail to recognize
the sd card correctly.
Increased the sdmmc lines drive strength from 4mA to 12mA.
Signed-off-by: Wadim Egorov <w.egorov@phytec.de>
Signed-off-by: Heiko Stuebner <heiko@sntech.de>
Diffstat (limited to 'arch/arm/boot/dts/rk3288-firefly.dtsi')
| -rw-r--r-- | arch/arm/boot/dts/rk3288-firefly.dtsi | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/arch/arm/boot/dts/rk3288-firefly.dtsi b/arch/arm/boot/dts/rk3288-firefly.dtsi index 4e3fd9aefe34..49ec20d24082 100644 --- a/arch/arm/boot/dts/rk3288-firefly.dtsi +++ b/arch/arm/boot/dts/rk3288-firefly.dtsi @@ -408,6 +408,11 @@ output-low; }; + pcfg_pull_up_drv_12ma: pcfg-pull-up-drv-12ma { + bias-pull-up; + drive-strength = <12>; + }; + act8846 { pwr_hold: pwr-hold { rockchip,pins = <0 1 RK_FUNC_GPIO &pcfg_output_high>; @@ -457,6 +462,25 @@ }; sdmmc { + /* + * Default drive strength isn't enough to achieve even + * high-speed mode on firefly board so bump up to 12ma. + */ + sdmmc_bus4: sdmmc-bus4 { + rockchip,pins = <6 16 RK_FUNC_1 &pcfg_pull_up_drv_12ma>, + <6 17 RK_FUNC_1 &pcfg_pull_up_drv_12ma>, + <6 18 RK_FUNC_1 &pcfg_pull_up_drv_12ma>, + <6 19 RK_FUNC_1 &pcfg_pull_up_drv_12ma>; + }; + + sdmmc_clk: sdmmc-clk { + rockchip,pins = <6 20 RK_FUNC_1 &pcfg_pull_none_12ma>; + }; + + sdmmc_cmd: sdmmc-cmd { + rockchip,pins = <6 21 RK_FUNC_1 &pcfg_pull_up_drv_12ma>; + }; + sdmmc_pwr: sdmmc-pwr { rockchip,pins = <7 11 RK_FUNC_GPIO &pcfg_pull_none>; }; |