[PATCH 2/2] arm64: dts: set the default i2c pin drive strength to 16mA
From: Srinivas Kandagatla <hidden>
Date: 2015-12-11 18:13:44
Also in:
linux-arm-msm, linux-devicetree, lkml
Subsystem:
arm/qualcomm mailing list, arm/qualcomm support, the rest · Maintainers:
Bjorn Andersson, Konrad Dybcio, Linus Torvalds
2mA drive strength is not enough when we connect multiple i2c devices on the bus with different pull up resistors. This issue was detected when multiple i2c devices connected on the other side of level shifters on Linaro sensor board. Maxing up to 16mA made i2c much stable. Signed-off-by: Srinivas Kandagatla <redacted> --- arch/arm64/boot/dts/qcom/msm8916-pins.dtsi | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-)
diff --git a/arch/arm64/boot/dts/qcom/msm8916-pins.dtsi b/arch/arm64/boot/dts/qcom/msm8916-pins.dtsi
index 49ec55a..1991af7 100644
--- a/arch/arm64/boot/dts/qcom/msm8916-pins.dtsi
+++ b/arch/arm64/boot/dts/qcom/msm8916-pins.dtsi@@ -272,7 +272,7 @@ }; pinconf { pins = "gpio6", "gpio7"; - drive-strength = <2>; + drive-strength = <16>; bias-disable = <0>; }; };
@@ -296,7 +296,7 @@ }; pinconf { pins = "gpio14", "gpio15"; - drive-strength = <2>; + drive-strength = <16>; bias-disable = <0>; }; };
@@ -320,7 +320,7 @@ }; pinconf { pins = "gpio22", "gpio23"; - drive-strength = <2>; + drive-strength = <16>; bias-disable = <0>; }; };
--
1.9.1