Commit 55161444 authored by Max Krummenacher's avatar Max Krummenacher Committed by Shawn Guo
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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: default avatarMax Krummenacher <max.krummenacher@toradex.com>
Signed-off-by: default avatarDenys Drozdov <denys.drozdov@toradex.com>
Signed-off-by: default avatarMarcel Ziswiler <marcel.ziswiler@toradex.com>
Signed-off-by: default avatarShawn Guo <shawnguo@kernel.org>
parent 3f781d5c

arch/arm/boot/dts/imx6ull-colibri.dtsi

+6 −4
Original line number Diff line number Diff line
@@ -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

		>;

	};