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From: Krzysztof Kozlowski <k.kozlowski@samsung.com>
To: javier@osg.samsung.com, Arnd Bergmann <arnd@arndb.de>,
	Kukjin Kim <kgene@kernel.org>,
	Krzysztof Kozlowski <krzk@kernel.org>,
	devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org,
	linux-samsung-soc@vger.kernel.org, linux-kernel@vger.kernel.org
Cc: Krzysztof Kozlowski <k.kozlowski@samsung.com>,
	Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
Subject: [PATCH 2/2] ARM: dts: exynos: Fix mismatched values of SD drive strengh configuration on exynos4415
Date: Thu, 01 Sep 2016 10:37:02 +0200	[thread overview]
Message-ID: <1472719022-27226-2-git-send-email-k.kozlowski@samsung.com> (raw)
In-Reply-To: <1472719022-27226-1-git-send-email-k.kozlowski@samsung.com>

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(-)

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 {
-- 
1.9.1

WARNING: multiple messages have this Message-ID (diff)
From: k.kozlowski@samsung.com (Krzysztof Kozlowski)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH 2/2] ARM: dts: exynos: Fix mismatched values of SD drive strengh configuration on exynos4415
Date: Thu, 01 Sep 2016 10:37:02 +0200	[thread overview]
Message-ID: <1472719022-27226-2-git-send-email-k.kozlowski@samsung.com> (raw)
In-Reply-To: <1472719022-27226-1-git-send-email-k.kozlowski@samsung.com>

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(-)

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 {
-- 
1.9.1

  reply	other threads:[~2016-09-01  8:37 UTC|newest]

Thread overview: 16+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2016-09-01  8:37 [PATCH 1/2] ARM: dts: exynos: Fix mismatched value for SD4 pull up/down configuration on exynos4210 Krzysztof Kozlowski
2016-09-01  8:37 ` Krzysztof Kozlowski
2016-09-01  8:37 ` Krzysztof Kozlowski [this message]
2016-09-01  8:37   ` [PATCH 2/2] ARM: dts: exynos: Fix mismatched values of SD drive strengh configuration on exynos4415 Krzysztof Kozlowski
2016-09-01 10:21   ` Javier Martinez Canillas
2016-09-01 10:21     ` Javier Martinez Canillas
2016-09-01 10:21     ` Javier Martinez Canillas
2016-09-01 11:21   ` Bartlomiej Zolnierkiewicz
2016-09-01 11:21     ` Bartlomiej Zolnierkiewicz
2016-09-01 11:26     ` Krzysztof Kozlowski
2016-09-01 11:26       ` Krzysztof Kozlowski
2016-09-01 10:19 ` [PATCH 1/2] ARM: dts: exynos: Fix mismatched value for SD4 pull up/down configuration on exynos4210 Javier Martinez Canillas
2016-09-01 10:19   ` Javier Martinez Canillas
2016-09-01 11:17 ` Bartlomiej Zolnierkiewicz
2016-09-01 11:17   ` Bartlomiej Zolnierkiewicz
2016-09-01 11:17   ` Bartlomiej Zolnierkiewicz

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