diff mbox series

[v2,2/2] arm64: dts: qcom: qrb4210-rb2: switch I2C2 to i2c-gpio

Message ID 20240605-rb12-i2c2g-pio-v2-2-946f5d6b6948@linaro.org
State Accepted
Commit f77e7bd40c3c2d79685e9cc80de874b69a976f55
Headers show
Series arm64: dts: qcom: switch RB1 and RB2 platforms to i2c2-gpio | expand

Commit Message

Dmitry Baryshkov June 5, 2024, 8:55 a.m. UTC
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 <dmitry.baryshkov@linaro.org>
---
 arch/arm64/boot/dts/qcom/qrb4210-rb2.dts | 13 ++++++++++++-
 1 file changed, 12 insertions(+), 1 deletion(-)
diff mbox series

Patch

diff --git a/arch/arm64/boot/dts/qcom/qrb4210-rb2.dts b/arch/arm64/boot/dts/qcom/qrb4210-rb2.dts
index 2c39bb1b97db..cb8a62714a30 100644
--- a/arch/arm64/boot/dts/qcom/qrb4210-rb2.dts
+++ b/arch/arm64/boot/dts/qcom/qrb4210-rb2.dts
@@ -60,6 +60,17 @@  hdmi_con: endpoint {
 		};
 	};
 
+	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";
 
@@ -190,7 +201,7 @@  zap-shader {
 	};
 };
 
-&i2c2 {
+&i2c2_gpio {
 	clock-frequency = <400000>;
 	status = "okay";