diff options
| author | Max Krummenacher <max.krummenacher@toradex.com> | 2018-07-24 14:29:32 +0200 |
|---|---|---|
| committer | Philippe Schenker <philippe.schenker@toradex.com> | 2019-06-18 08:17:58 +0200 |
| commit | 7f51c0bfa4606a2373965866cb2bd0b3d0eb93dd (patch) | |
| tree | 1ebe99cafc9244c12645dac801b63ad40d22c0c8 | |
| parent | ae90611d38da02dffa24a3637769846af4b1fe59 (diff) | |
ARM: dts: imx6ull-colibri: change touch i2c parameters
Switch on 22 kOhm pull ups and lower the I2C frequency to around 40kHz
to get a more reliable communication.
Signed-off-by: Max Krummenacher <max.krummenacher@toradex.com>
| -rw-r--r-- | arch/arm/boot/dts/imx6ull-colibri.dtsi | 10 |
1 files changed, 6 insertions, 4 deletions
diff --git a/arch/arm/boot/dts/imx6ull-colibri.dtsi b/arch/arm/boot/dts/imx6ull-colibri.dtsi index 9ad1da159768..3e8d80703f2f 100644 --- a/arch/arm/boot/dts/imx6ull-colibri.dtsi +++ b/arch/arm/boot/dts/imx6ull-colibri.dtsi @@ -99,6 +99,8 @@ }; &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>; @@ -338,15 +340,15 @@ 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 >; }; |