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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>
This commit is contained in:
Geert Uytterhoeven 2019-03-20 20:44:09 +01:00 committed by Simon Horman
parent 26c9d79b37
commit 129ca9e185
1 changed files with 33 additions and 0 deletions
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33
arch/arm/boot/dts/r7s72100-rskrza1.dts
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@ -47,6 +47,34 @@ &extal_clk {
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 @@ &rtc_x1_clk {
};
&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 {