From 1f748df085590daf4d220b50123082bb0d9b465c Mon Sep 17 00:00:00 2001 From: Jeff Kletsky Date: Wed, 23 Oct 2019 09:55:02 -0700 Subject: [PATCH] ath79: GL-AR750S: Add I2C Support The GL-AR750S has an internal header for I2C. Provide DTS definitions for the i2c-gpio driver. The I2C drivers; kmod-i2c-core, kmod-i2c-gpio consume ~20 kB of flash and can be loaded as modules, Default clock measured ~11.2 ms period, ~89 kHz The board has well-labeled (unpopulated) headers for serial and I2C along the front edge of the board (the edge with the LEDs). Looking from the top, rear of the unit (behind Ethernet jacks) ------------------------------------------- 5G_LED 2G_LED PWR_LED O O O O O O O 3 S S G T R G V C D N X X N 3 L A D D Signed-off-by: Jeff Kletsky --- target/linux/ath79/dts/qca9563_glinet_gl-ar750s.dts | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/target/linux/ath79/dts/qca9563_glinet_gl-ar750s.dts b/target/linux/ath79/dts/qca9563_glinet_gl-ar750s.dts index 24198e80436..4f65b2d2e29 100644 --- a/target/linux/ath79/dts/qca9563_glinet_gl-ar750s.dts +++ b/target/linux/ath79/dts/qca9563_glinet_gl-ar750s.dts @@ -63,6 +63,13 @@ }; }; + i2c: i2c { + compatible = "i2c-gpio"; + + sda-gpios = <&gpio 5 (GPIO_ACTIVE_HIGH|GPIO_OPEN_DRAIN)>; + scl-gpios = <&gpio 21 (GPIO_ACTIVE_HIGH|GPIO_OPEN_DRAIN)>; + }; + usb_vbus: regulator-usb-vbus { compatible = "regulator-fixed"; -- 2.30.2