diff options
| author | David Bauer | 2025-05-06 16:23:50 +0000 |
|---|---|---|
| committer | David Bauer | 2025-05-10 19:26:08 +0000 |
| commit | f828be4d10d795e2bd74ea77ea12dec285107974 (patch) | |
| tree | 1d1746328d3ae91c7afcc2e14bd6c1893b94d4d0 | |
| parent | 49a1781d74590f0945973dac6d82faeb2f624b6f (diff) | |
| download | openwrt-f828be4d10d795e2bd74ea77ea12dec285107974.tar.gz | |
ramips: use i2c-gpio driver for EX400
Configure the i2c pins as GPIO outputs and use the i2c-gpio driver to
control the Semtech SX9512 touch controller.
This fixes spurious errors in i2c transactions even at 1kHz with the
native i2c driver.
leds green:wan: Setting an LED's brightness failed (-6)
Signed-off-by: David Bauer <mail@david-bauer.net>
| -rw-r--r-- | target/linux/ramips/dts/mt7621_genexis_pulse-ex400-common.dtsi | 17 | ||||
| -rw-r--r-- | target/linux/ramips/dts/mt7621_genexis_pulse-ex400.dts | 4 |
2 files changed, 16 insertions, 5 deletions
diff --git a/target/linux/ramips/dts/mt7621_genexis_pulse-ex400-common.dtsi b/target/linux/ramips/dts/mt7621_genexis_pulse-ex400-common.dtsi index a3bc70e8ce..ebcf558359 100644 --- a/target/linux/ramips/dts/mt7621_genexis_pulse-ex400-common.dtsi +++ b/target/linux/ramips/dts/mt7621_genexis_pulse-ex400-common.dtsi @@ -41,6 +41,18 @@ gpios = <&gpio 11 GPIO_ACTIVE_HIGH>; }; }; + + i2c_gpio: i2c-gpio { + compatible = "i2c-gpio"; + + sda-gpios = <&gpio 3 GPIO_ACTIVE_HIGH>; + scl-gpios = <&gpio 4 GPIO_ACTIVE_HIGH>; + + i2c-gpio,delay-us = <50>; + i2c-gpio,timeout-ms = <100>; + + /* Semtech SX9512 */ + }; }; &pcie { @@ -92,7 +104,8 @@ }; &i2c { - status = "okay"; + /* Uses i2c-gpio */ + status = "disabled"; }; ðphy0 { @@ -101,7 +114,7 @@ &state_default { gpio { - groups = "uart2", "uart3"; + groups = "i2c", "uart2", "uart3"; function = "gpio"; }; }; diff --git a/target/linux/ramips/dts/mt7621_genexis_pulse-ex400.dts b/target/linux/ramips/dts/mt7621_genexis_pulse-ex400.dts index 61b3e869d7..ad8a22ad79 100644 --- a/target/linux/ramips/dts/mt7621_genexis_pulse-ex400.dts +++ b/target/linux/ramips/dts/mt7621_genexis_pulse-ex400.dts @@ -22,9 +22,7 @@ }; }; -&i2c { - clock-frequency = <1000>; - +&i2c_gpio { touch@2b { compatible = "semtech,sx9512"; |