From: Geert Uytterhoeven <geert+renesas@glider.be>
Date: Wed, 20 Mar 2019 19:44:09 +0000 (+0100)
Subject: ARM: dts: rskrza1: Add I2C support
X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=129ca9e185ab34e939eab91ef8f10c115fc43ba5;p=linux.git

ARM: dts: rskrza1: Add I2C support

Enable the I2C bus, and add the following devices:
  - Two CAT9554 port expanders (8 GPIOs, interrupt not wired by
    default),
  - R1EX24016ASAS0A EEPROM.

The bus also contains a MAX9856 Audio Codec, which is not yet supported.

All devices (incl. the audio codec) are documented to support an I2C bus
running at 400 kHz.

Pinctrl is based on the RZ/A BSP.

Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>
---

diff --git a/arch/arm/boot/dts/r7s72100-rskrza1.dts b/arch/arm/boot/dts/r7s72100-rskrza1.dts
index 8ee44a100e9a4..60e80ecbbf682 100644
--- a/arch/arm/boot/dts/r7s72100-rskrza1.dts
+++ b/arch/arm/boot/dts/r7s72100-rskrza1.dts
@@ -47,6 +47,34 @@
 	clock-frequency = <13330000>;
 };
 
+&i2c3 {
+	pinctrl-names = "default";
+	pinctrl-0 = <&i2c3_pins>;
+	status = "okay";
+
+	clock-frequency = <400000>;
+
+	io_expander1: gpio@20 {
+		compatible = "onnn,cat9554";
+		reg = <0x20>;
+		gpio-controller;
+		#gpio-cells = <2>;
+	};
+
+	io_expander2: gpio@21 {
+		compatible = "onnn,cat9554";
+		reg = <0x21>;
+		gpio-controller;
+		#gpio-cells = <2>;
+	};
+
+	eeprom@50 {
+		compatible = "renesas,r1ex24016", "atmel,24c16";
+		reg = <0x50>;
+		pagesize = <16>;
+	};
+};
+
 &usb_x1_clk {
 	clock-frequency = <48000000>;
 };
@@ -56,6 +84,11 @@
 };
 
 &pinctrl {
+	/* RIIC ch3 (Port Expander, EEPROM (MAC Addr), Audio Codec) */
+	i2c3_pins: i2c3 {
+		pinmux = <RZA1_PINMUX(1, 6, 1)>,	/* RIIC3SCL */
+			 <RZA1_PINMUX(1, 7, 1)>;	/* RIIC3SDA */
+	};
 
 	/* Serial Console */
 	scif2_pins: serial2 {