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

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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>
This commit is contained in:
Max Krummenacher
2022-05-06 15:24:05 +02:00
committed by Shawn Guo
parent 3f781d5c67
commit 5516144425
1 changed files with 6 additions and 4 deletions
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10
arch/arm/boot/dts/imx6ull-colibri.dtsi
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@@ -114,6 +114,8 @@ &i2c1 {
};
&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 @@ MX6UL_PAD_UART4_RX_DATA__GPIO1_IO29 0x4001b8b0 /* SODIMM 194 */
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
>;
};