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authorMax Krummenacher <max.krummenacher@toradex.com>2018-07-24 14:29:32 +0200
committerMarcel Ziswiler <marcel.ziswiler@toradex.com>2018-12-24 01:27:33 +0100
commitffccd571b7e0ac5e62d9866c5788533940b33068 (patch)
tree911530e1b6dc5d239ac0796e35014366b803cee8 /arch
parent689b98bd704bea0076b88eacfcf54b445cf9ef4c (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>
Diffstat (limited to 'arch')
-rw-r--r--arch/arm/boot/dts/imx6ull-colibri.dtsi10
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
>;
};