diff mbox series

[v2,02/14] ARM: dts: imx6ull-colibri: change touch i2c parameters

Message ID 20220425162356.176665-3-marcel@ziswiler.com (mailing list archive)
State New, archived
Headers show
Series ARM: dts: imx6ull-colibri: device tree improvements | expand

Commit Message

Marcel Ziswiler April 25, 2022, 4:23 p.m. UTC 
From: Max Krummenacher <max.krummenacher@toradex.com>

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>
---

(no changes since v1)

 arch/arm/boot/dts/imx6ull-colibri.dtsi | 10 ++++++----
 1 file changed, 6 insertions(+), 4 deletions(-)
diff mbox series

Patch

diff --git a/arch/arm/boot/dts/imx6ull-colibri.dtsi b/arch/arm/boot/dts/imx6ull-colibri.dtsi
index eb13ed60d2e4..bea00cfaa820 100644
--- a/arch/arm/boot/dts/imx6ull-colibri.dtsi
+++ b/arch/arm/boot/dts/imx6ull-colibri.dtsi
@@ -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
 		>;
 	};