ARM: dts: imx6qdl-rex: add gpio expander pca9535

The pca9535 gpio expander is present on the Rex baseboard, but missing
from the dtsi.
The pca9535 is on i2c2 bus which is common to the three SOM
variants (Basic/Pro/Ultra), thus it is activated by default.

Add also the new gpio controller and the associated interrupt line
MX6QDL_PAD_NANDF_CS3__GPIO6_IO16.

Signed-off-by: Gilles DOFFE <gilles.doffe@savoirfairelinux.com>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>

diff --git a/arch/arm/boot/dts/imx6qdl-rex.dtsi b/arch/arm/boot/dts/imx6qdl-rex.dtsi
index 97f1659144ea545f4ae2ee0fdedbf57d6177c4fe..de514eb5aa99db4d47bf6d5082cedd3f760a367c 100644 (file)
--- a/arch/arm/boot/dts/imx6qdl-rex.dtsi
+++ b/arch/arm/boot/dts/imx6qdl-rex.dtsi
@@ -132,6 +132,19 @@ &i2c2 {
        pinctrl-0 = <&pinctrl_i2c2>;
        status = "okay";
 
+       pca9535: gpio-expander@27 {
+               compatible = "nxp,pca9535";
+               reg = <0x27>;
+               gpio-controller;
+               #gpio-cells = <2>;
+               pinctrl-names = "default";
+               pinctrl-0 = <&pinctrl_pca9535>;
+               interrupt-parent = <&gpio6>;
+               interrupts = <16 IRQ_TYPE_LEVEL_LOW>;
+               interrupt-controller;
+               #interrupt-cells = <2>;
+       };
+
        eeprom@57 {
                compatible = "atmel,24c02";
                reg = <0x57>;
@@ -237,6 +250,12 @@ MX6QDL_PAD_GPIO_2__GPIO1_IO02              0x80000000
                        >;
                };
 
+               pinctrl_pca9535: pca9535grp {
+                       fsl,pins = <
+                               MX6QDL_PAD_NANDF_CS3__GPIO6_IO16        0x17059
+                  >;
+               };
+
                pinctrl_uart1: uart1grp {
                        fsl,pins = <
                                MX6QDL_PAD_CSI0_DAT10__UART1_TX_DATA    0x1b0b1