| Message ID | 1472719022-27226-2-git-send-email-k.kozlowski@samsung.com (mailing list archive) |
|---|---|
| State | Superseded |
| Headers | show |
Hello Krzysztof, On 09/01/2016 10:37 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@samsung.com> > --- Reviewed-by: Javier Martinez Canillas <javier@osg.samsung.com> Best regards,
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@samsung.com> Reviewed-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com> 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 -- To unsubscribe from this list: send the line "unsubscribe linux-samsung-soc" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
On 09/01/2016 01:21 PM, Bartlomiej Zolnierkiewicz wrote: > 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? Fine with me. I would ack such patches so (anyone) please go ahead. :) Best regards, Krzysztof -- To unsubscribe from this list: send the line "unsubscribe linux-samsung-soc" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
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 {
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@samsung.com> --- arch/arm/boot/dts/exynos4415-pinctrl.dtsi | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-)