From 184f39b57cab6fd00b045689d300070ca0ceac78 Mon Sep 17 00:00:00 2001 From: Andrey Smirnov Date: Mon, 15 May 2017 07:53:03 -0700 Subject: [PATCH] ARM: dts: imx7d-sdb: Add GPIO expander node Add node for U38, a 74LV595PW serial-in shift register that acts as a GPIO expander on the board. Cc: yurovsky@gmail.com Cc: Dong Aisheng Cc: Sascha Hauer Cc: Fabio Estevam Cc: Rob Herring Cc: Mark Rutland Cc: Russell King Cc: devicetree@vger.kernel.org Cc: linux-kernel@vger.kernel.org Signed-off-by: Andrey Smirnov Signed-off-by: Shawn Guo --- arch/arm/boot/dts/imx7d-sdb.dts | 29 +++++++++++++++++++++++++++++ 1 file changed, 29 insertions(+) diff --git a/arch/arm/boot/dts/imx7d-sdb.dts b/arch/arm/boot/dts/imx7d-sdb.dts index 5be01a1bf840..d6f2dda90710 100644 --- a/arch/arm/boot/dts/imx7d-sdb.dts +++ b/arch/arm/boot/dts/imx7d-sdb.dts @@ -52,6 +52,27 @@ reg = <0x80000000 0x80000000>; }; + spi4 { + compatible = "spi-gpio"; + pinctrl-names = "default"; + pinctrl-0 = <&pinctrl_spi4>; + gpio-sck = <&gpio1 13 GPIO_ACTIVE_HIGH>; + gpio-mosi = <&gpio1 9 GPIO_ACTIVE_HIGH>; + cs-gpios = <&gpio1 12 GPIO_ACTIVE_HIGH>; + num-chipselects = <1>; + #address-cells = <1>; + #size-cells = <0>; + + extended_io: gpio-expander@0 { + compatible = "fairchild,74hc595"; + gpio-controller; + #gpio-cells = <2>; + reg = <0>; + registers-number = <1>; + spi-max-frequency = <100000>; + }; + }; + regulators { compatible = "simple-bus"; #address-cells = <1>; @@ -642,5 +663,13 @@ fsl,pins = < MX7D_PAD_LPSR_GPIO1_IO01__PWM1_OUT 0x110b0 >; + + pinctrl_spi4: spi4grp { + fsl,pins = < + MX7D_PAD_GPIO1_IO09__GPIO1_IO9 0x59 + MX7D_PAD_GPIO1_IO12__GPIO1_IO12 0x59 + MX7D_PAD_GPIO1_IO13__GPIO1_IO13 0x59 + >; + }; }; }; -- 2.20.1