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ARM: dts: imx6q-bx50v3: configure unused pca953x pins

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At power on, pca953x GPIO pins are configured as input and may cause
unexpected interrupts. Configure the unused pins as GPO low to
avoid unexpected interrupts.

Signed-off-by: Ken Lin <ken.lin@advantech.com.tw>
Signed-off-by: Akshay Bhat <akshay.bhat@timesys.com>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>
This commit is contained in:
Ken Lin 2016-08-12 13:45:11 -04:00 committed by Shawn Guo
parent b5ca028fe9
commit 118e81cb73
3 changed files with 95 additions and 0 deletions
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16
arch/arm/boot/dts/imx6q-b450v3.dts
View File

@ -89,3 +89,19 @@
};
};
};
&pca9539 {
P04 {
gpio-hog;
gpios = <4 0>;
output-low;
line-name = "PCA9539-P04";
};
P05 {
gpio-hog;
gpios = <5 0>;
output-low;
line-name = "PCA9539-P05";
};
};

9
arch/arm/boot/dts/imx6q-b650v3.dts
View File

@ -89,3 +89,12 @@
};
};
};
&pca9539 {
P05 {
gpio-hog;
gpios = <5 0>;
output-low;
line-name = "PCA9539-P05";
};
};

70
arch/arm/boot/dts/imx6q-bx50v3.dtsi
View File

@ -183,6 +183,76 @@
interrupt-controller;
interrupt-parent = <&gpio2>;
interrupts = <3 IRQ_TYPE_LEVEL_LOW>;
P06 {
gpio-hog;
gpios = <6 0>;
output-low;
line-name = "PCA9539-P06";
};
P07 {
gpio-hog;
gpios = <7 0>;
output-low;
line-name = "PCA9539-P07";
};
P10 {
gpio-hog;
gpios = <8 0>;
output-low;
line-name = "PCA9539-P10";
};
P11 {
gpio-hog;
gpios = <9 0>;
output-low;
line-name = "PCA9539-P11";
};
P12 {
gpio-hog;
gpios = <10 0>;
output-low;
line-name = "PCA9539-P12";
};
P13 {
gpio-hog;
gpios = <11 0>;
output-low;
line-name = "PCA9539-P13";
};
P14 {
gpio-hog;
gpios = <12 0>;
output-low;
line-name = "PCA9539-P14";
};
P15 {
gpio-hog;
gpios = <13 0>;
output-low;
line-name = "PCA9539-P15";
};
P16 {
gpio-hog;
gpios = <14 0>;
output-low;
line-name = "PCA9539-P16";
};
P17 {
gpio-hog;
gpios = <15 0>;
output-low;
line-name = "PCA9539-P17";
};
};
};