diff options
| author | Max Krummenacher <max.krummenacher@toradex.com> | 2018-07-24 14:29:32 +0200 |
|---|---|---|
| committer | Max Krummenacher <max.krummenacher@toradex.com> | 2018-07-25 15:43:06 +0200 |
| commit | 35434ac3918c5ba303cb9cb2396a3f75dd1e247c (patch) | |
| tree | fee4eb6c3c5a5481c59046658ddaf4902db27a9a | |
| parent | f3637519a6aad71901edd43d8e85d13708a7a76e (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>
(cherry picked from commit ffb2a2a59869415921e816614749ad5e48f9c077)
| -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 4ed695f39a25..12c036c6cda0 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 >; }; |