From: Max Krummenacher <max.krummenacher@xxxxxxxxxxx>
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@xxxxxxxxxxx>
Signed-off-by: Denys Drozdov <denys.drozdov@xxxxxxxxxxx>
Signed-off-by: Marcel Ziswiler <marcel.ziswiler@xxxxxxxxxxx>
---
arch/arm/boot/dts/imx6ull-colibri.dtsi | 10 ++++++----
1 file changed, 6 insertions(+), 4 deletions(-)
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
>;
};
--
2.35.1
