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Commit 184f39b5 authored by Andrey Smirnov's avatar Andrey Smirnov Committed by Shawn Guo
Browse files

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 <aisheng.dong@nxp.com>
Cc: Sascha Hauer <kernel@pengutronix.de>
Cc: Fabio Estevam <fabio.estevam@nxp.com>
Cc: Rob Herring <robh+dt@kernel.org>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Russell King <linux@armlinux.org.uk>
Cc: devicetree@vger.kernel.org
Cc: linux-kernel@vger.kernel.org
Signed-off-by: default avatarAndrey Smirnov <andrew.smirnov@gmail.com>
Signed-off-by: default avatarShawn Guo <shawnguo@kernel.org>
parent 9760c06b

arch/arm/boot/dts/imx7d-sdb.dts

+29 −0
Original line number Diff line number Diff line
@@ -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

			>;

		};

	};

};