From: Max Krummenacher <max.krummenacher@toradex.com>
Date: Fri, 6 May 2022 13:24:05 +0000 (+0200)
Subject: ARM: dts: imx6ull-colibri: change touch i2c parameters
X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=5516144425e413f0efe92b249142b4db15ff7ec5;p=linux.git

ARM: dts: imx6ull-colibri: change touch i2c parameters

Switch on 22 kOhm pull-ups and lower the I2C frequency to around 40 kHz
to get more reliable communication.

Signed-off-by: Max Krummenacher <max.krummenacher@toradex.com>
Signed-off-by: Denys Drozdov <denys.drozdov@toradex.com>
Signed-off-by: Marcel Ziswiler <marcel.ziswiler@toradex.com>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>
---

diff --git a/arch/arm/boot/dts/imx6ull-colibri.dtsi b/arch/arm/boot/dts/imx6ull-colibri.dtsi
index 84bb7574d211b..dc947035495b6 100644
--- a/arch/arm/boot/dts/imx6ull-colibri.dtsi
+++ b/arch/arm/boot/dts/imx6ull-colibri.dtsi
@@ -114,6 +114,8 @@
 };
 
 &i2c2 {
+	/* Use low frequency to compensate for the high pull-up values. */
+	clock-frequency = <40000>;
 	pinctrl-names = "default", "gpio";
 	pinctrl-0 = <&pinctrl_i2c2>;
 	pinctrl-1 = <&pinctrl_i2c2_gpio>;
@@ -405,15 +407,15 @@
 
 	pinctrl_i2c2: i2c2-grp {
 		fsl,pins = <
-			MX6UL_PAD_UART5_TX_DATA__I2C2_SCL 0x4001b8b0
-			MX6UL_PAD_UART5_RX_DATA__I2C2_SDA 0x4001b8b0
+			MX6UL_PAD_UART5_TX_DATA__I2C2_SCL 0x4001f8b0
+			MX6UL_PAD_UART5_RX_DATA__I2C2_SDA 0x4001f8b0
 		>;
 	};
 
 	pinctrl_i2c2_gpio: i2c2-gpio-grp {
 		fsl,pins = <
-			MX6UL_PAD_UART5_TX_DATA__GPIO1_IO30 0x4001b8b0
-			MX6UL_PAD_UART5_RX_DATA__GPIO1_IO31 0x4001b8b0
+			MX6UL_PAD_UART5_TX_DATA__GPIO1_IO30 0x4001f8b0
+			MX6UL_PAD_UART5_RX_DATA__GPIO1_IO31 0x4001f8b0
 		>;
 	};