Hi,
On Thursday, September 01, 2016 10:37:02 AM Krzysztof Kozlowski wrote:
> The pinctrl drive strength register on exynos4415 is 2-bit wide for each
> pin. The pins for SD2 were configured with value of 4. The driver does
> not validate the value so this overflow effectively set a bit 1 in
> adjacent pins thus configuring them to drive strength 2x.
>
> The author's intention was probably to set drive strength of 4x.
> All other SD pins are configured with drive strength of 4x. Fix these
> with same pattern.
>
> Fixes: 9246e7ff24c5 ("ARM: dts: Add dts files for exynos4415 SoC")
> Signed-off-by: Krzysztof Kozlowski <k.kozlowski@xxxxxxxxxxx>
Reviewed-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@xxxxxxxxxxx>
BTW This reminds me that there are still no board files for Exynos4415
SoC based boards so maybe we should consider removal of its support?
> ---
> arch/arm/boot/dts/exynos4415-pinctrl.dtsi | 8 ++++----
> 1 file changed, 4 insertions(+), 4 deletions(-)
>
> diff --git a/arch/arm/boot/dts/exynos4415-pinctrl.dtsi b/arch/arm/boot/dts/exynos4415-pinctrl.dtsi
> index f54aee53b6ec..76cfd872ead3 100644
> --- a/arch/arm/boot/dts/exynos4415-pinctrl.dtsi
> +++ b/arch/arm/boot/dts/exynos4415-pinctrl.dtsi
> @@ -480,14 +480,14 @@
> samsung,pins = "gpk2-0";
> samsung,pin-function = <EXYNOS_PIN_FUNC_2>;
> samsung,pin-pud = <EXYNOS_PIN_PULL_NONE>;
> - samsung,pin-drv = <4>;
> + samsung,pin-drv = <EXYNOS4_PIN_DRV_LV4>;
> };
>
> sd2_cmd: sd2-cmd {
> samsung,pins = "gpk2-1";
> samsung,pin-function = <EXYNOS_PIN_FUNC_2>;
> samsung,pin-pud = <EXYNOS_PIN_PULL_NONE>;
> - samsung,pin-drv = <4>;
> + samsung,pin-drv = <EXYNOS4_PIN_DRV_LV4>;
> };
>
> sd2_cd: sd2-cd {
> @@ -501,14 +501,14 @@
> samsung,pins = "gpk2-3";
> samsung,pin-function = <EXYNOS_PIN_FUNC_2>;
> samsung,pin-pud = <EXYNOS_PIN_PULL_UP>;
> - samsung,pin-drv = <4>;
> + samsung,pin-drv = <EXYNOS4_PIN_DRV_LV4>;
> };
>
> sd2_bus4: sd2-bus-width4 {
> samsung,pins = "gpk2-4", "gpk2-5", "gpk2-6";
> samsung,pin-function = <EXYNOS_PIN_FUNC_2>;
> samsung,pin-pud = <EXYNOS_PIN_PULL_UP>;
> - samsung,pin-drv = <4>;
> + samsung,pin-drv = <EXYNOS4_PIN_DRV_LV4>;
> };
>
> cam_port_b_io: cam-port-b-io {
Best regards,
--
Bartlomiej Zolnierkiewicz
Samsung R&D Institute Poland
Samsung Electronics
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