From 104456f7f4e4e501baef183968dbe48de18be443 Mon Sep 17 00:00:00 2001 From: Dmitry Baryshkov Date: Wed, 5 Jun 2024 11:55:57 +0300 Subject: [PATCH] arm64: dts: qcom: qrb4210-rb2: switch I2C2 to i2c-gpio commit f77e7bd40c3c2d79685e9cc80de874b69a976f55 upstream. On the Qualcomm RB2 platform the I2C bus connected to the LT9611UXC bridge under some circumstances can go into a state when all transfers timeout. This causes both issues with fetching of EDID and with updating of the bridge's firmware. While we are debugging the issue, switch corresponding I2C bus to use i2c-gpio driver. While using i2c-gpio no communication issues are observed. This patch is asusmed to be a temporary fix, so it is implemented in a non-intrusive manner to simply reverting it later. Fixes: f7b01e07e89c ("arm64: dts: qcom: qrb4210-rb2: Enable display out") Cc: stable@vger.kernel.org Signed-off-by: Dmitry Baryshkov Reviewed-by: Caleb Connolly Link: https://lore.kernel.org/r/20240605-rb12-i2c2g-pio-v2-2-946f5d6b6948@linaro.org Signed-off-by: Bjorn Andersson Signed-off-by: Greg Kroah-Hartman --- arch/arm64/boot/dts/qcom/qrb4210-rb2.dts | 13 ++++++++++++- 1 file changed, 12 insertions(+), 1 deletion(-) diff --git a/arch/arm64/boot/dts/qcom/qrb4210-rb2.dts b/arch/arm64/boot/dts/qcom/qrb4210-rb2.dts index 9738c0dacd58..c8e80bb405e7 100644 --- a/arch/arm64/boot/dts/qcom/qrb4210-rb2.dts +++ b/arch/arm64/boot/dts/qcom/qrb4210-rb2.dts @@ -57,6 +57,17 @@ }; }; + i2c2_gpio: i2c { + compatible = "i2c-gpio"; + + sda-gpios = <&tlmm 6 GPIO_ACTIVE_HIGH>; + scl-gpios = <&tlmm 7 GPIO_ACTIVE_HIGH>; + #address-cells = <1>; + #size-cells = <0>; + + status = "disabled"; + }; + leds { compatible = "gpio-leds"; @@ -187,7 +198,7 @@ }; }; -&i2c2 { +&i2c2_gpio { clock-frequency = <400000>; status = "okay";