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 f0a2be5268e355822e1fde2a162ccef15e167b9d..78bfc1a307d60c61ad340d979959748e7abdd564 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 33cb71acadcced4c5fe4bb332e0372d0502076ed..d853887254268aae304f3a90b244bef3cdc07990 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 cf3fd31e3406070df72f0ce5ea3a98c631d97aa4..e4a415fd899b670bf74f44b3640580910919d960 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";
+                               };
                        };
                };