From d7f2fe5c101c9135e0a07c1c98ea063af317568e Mon Sep 17 00:00:00 2001 From: Dmitry Baryshkov Date: Wed, 5 Jun 2024 11:55:56 +0300 Subject: [PATCH] arm64: dts: qcom: qrb2210-rb1: switch I2C2 to i2c-gpio BugLink: https://bugs.launchpad.net/bugs/2079945 commit b7b545ccc08873e107aa24c461b1fdb123dd3761 upstream. On the Qualcomm RB1 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: 616eda24edd4 ("arm64: dts: qcom: qrb2210-rb1: Set up HDMI") Cc: stable@vger.kernel.org Signed-off-by: Dmitry Baryshkov Reviewed-by: Caleb Connolly Link: https://lore.kernel.org/r/20240605-rb12-i2c2g-pio-v2-1-946f5d6b6948@linaro.org Signed-off-by: Bjorn Andersson Signed-off-by: Greg Kroah-Hartman Signed-off-by: Portia Stephens Signed-off-by: Stefan Bader --- arch/arm64/boot/dts/qcom/qrb2210-rb1.dts | 13 ++++++++++++- 1 file changed, 12 insertions(+), 1 deletion(-) diff --git a/arch/arm64/boot/dts/qcom/qrb2210-rb1.dts b/arch/arm64/boot/dts/qcom/qrb2210-rb1.dts index 6e9dd0312adc..a9ab924d2ed1 100644 --- a/arch/arm64/boot/dts/qcom/qrb2210-rb1.dts +++ b/arch/arm64/boot/dts/qcom/qrb2210-rb1.dts @@ -59,6 +59,17 @@ }; }; + 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"; @@ -199,7 +210,7 @@ status = "okay"; }; -&i2c2 { +&i2c2_gpio { clock-frequency = <400000>; status = "okay";