diff options
author | Max Krummenacher <max.krummenacher@toradex.com> | 2018-07-24 14:29:32 +0200 |
---|---|---|
committer | Philippe Schenker <philippe.schenker@toradex.com> | 2019-05-09 11:13:54 +0200 |
commit | 5bb746de1a8edc995f4ff7763f4ae26ca1796c9d (patch) | |
tree | 109e0c122896ed6f417dc9ef0709b464ed40d9c2 | |
parent | 62baa0b8ae7712ac9194d01bad877d6ecb140f08 (diff) |
imx6ull-colibri.dtsi: 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>
Acked-by: Marcel Ziswiler <marcel.ziswiler@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 75d959c64284..da1e67274309 100644 --- a/arch/arm/boot/dts/imx6ull-colibri.dtsi +++ b/arch/arm/boot/dts/imx6ull-colibri.dtsi @@ -151,6 +151,8 @@ }; &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>; @@ -361,15 +363,15 @@ pinctrl_i2c2: i2c2grp { 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 >; }; |