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

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>

diff --git a/arch/arm/boot/dts/imx6q-b450v3.dts b/arch/arm/boot/dts/imx6q-b450v3.dts
index f0a2be5..78bfc1a 100644 (file)
--- a/arch/arm/boot/dts/imx6q-b450v3.dts
+++ b/arch/arm/boot/dts/imx6q-b450v3.dts
@@ -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";
+       };
+};

diff --git a/arch/arm/boot/dts/imx6q-b650v3.dts b/arch/arm/boot/dts/imx6q-b650v3.dts
index 33cb71a..d853887 100644 (file)
--- a/arch/arm/boot/dts/imx6q-b650v3.dts
+++ b/arch/arm/boot/dts/imx6q-b650v3.dts
@@ -89,3 +89,12 @@
                };
        };
 };
+
+&pca9539 {
+       P05 {
+               gpio-hog;
+               gpios = <5 0>;
+               output-low;
+               line-name = "PCA9539-P05";
+       };
+};

diff --git a/arch/arm/boot/dts/imx6q-bx50v3.dtsi b/arch/arm/boot/dts/imx6q-bx50v3.dtsi
index cf3fd31..e4a415f 100644 (file)
--- a/arch/arm/boot/dts/imx6q-bx50v3.dtsi
+++ b/arch/arm/boot/dts/imx6q-bx50v3.dtsi
@@ -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";
+                               };
                        };
                };