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[06/21] ARM: dts: rskrza1: Add I2C support

Message ID 129ca9e185ab34e939eab91ef8f10c115fc43ba5.1555655522.git.horms+renesas@verge.net.au (mailing list archive)
State New, archived
Headers show
Series [GIT,PULL] Renesas ARM Based SoC DT Updates for v5.2 | expand

Commit Message

Simon Horman April 19, 2019, 2:34 p.m. UTC 
From: Geert Uytterhoeven <geert+renesas@glider.be>

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>
---
 arch/arm/boot/dts/r7s72100-rskrza1.dts | 33 +++++++++++++++++++++++++++++++++
 1 file changed, 33 insertions(+)
diff mbox series

Patch

diff --git a/arch/arm/boot/dts/r7s72100-rskrza1.dts b/arch/arm/boot/dts/r7s72100-rskrza1.dts
index 8ee44a100e9a..60e80ecbbf68 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 {