[PATCH v2 2/9] arm64: dts: qcom: add correct drive strenght on cs pins
From: Srinivas Kandagatla <hidden>
Date: 2016-01-28 17:43:41
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 strenght is not enough to drive chipselect low on hardware configurations with level shifters, 16mA should give good range to allow such configurations to work. This issue was noticed while testing spi on db410c with sensor board. Signed-off-by: Srinivas Kandagatla <redacted> --- arch/arm64/boot/dts/qcom/msm8916-pins.dtsi | 14 +++++++------- 1 file changed, 7 insertions(+), 7 deletions(-)
diff --git a/arch/arm64/boot/dts/qcom/msm8916-pins.dtsi b/arch/arm64/boot/dts/qcom/msm8916-pins.dtsi
index 3bd917e..8d05005 100644
--- a/arch/arm64/boot/dts/qcom/msm8916-pins.dtsi
+++ b/arch/arm64/boot/dts/qcom/msm8916-pins.dtsi@@ -81,8 +81,8 @@ bias-disable; }; pinconf_cs { - pins = "gpio2"; - drive-strength = <2>; + pins = "gpio16"; + drive-strength = <16>; bias-disable; output-high; };
@@ -116,7 +116,7 @@ }; pinconf_cs { pins = "gpio6"; - drive-strength = <2>; + drive-strength = <16>; bias-disable; output-high; };
@@ -150,7 +150,7 @@ }; pinconf_cs { pins = "gpio10"; - drive-strength = <2>; + drive-strength = <16>; bias-disable; output-high; };
@@ -184,7 +184,7 @@ }; pinconf_cs { pins = "gpio14"; - drive-strength = <2>; + drive-strength = <16>; bias-disable; output-high; };
@@ -218,7 +218,7 @@ }; pinconf_cs { pins = "gpio18"; - drive-strength = <2>; + drive-strength = <16>; bias-disable; output-high; };
@@ -252,7 +252,7 @@ }; pinconf_cs { pins = "gpio22"; - drive-strength = <2>; + drive-strength = <16>; bias-disable; output-high; };
--
1.9.1