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ARM: dts: imx23: Add i2c support 

The imx23-olinuxino board has an i2c interface exposed on UEXT connector.
This patch provides the generic devicetree infrastructure for a follow-up
patch to add support to the actual board files.
Tested all three possible pin groups with MOD-LCD1x9 from Olimex.

This patch is based on work by Fadil Berisha with his permission. However
all bugs are mine.

Signed-off-by: Harald Geyer <harald@ccbib.org>
Acked-by: Stefan Wahren <stefan.wahren@i2se.com>
Acked-by: Marek Vasut <marex@denx.de>
Signed-off-by: Shawn Guo <shawn.guo@linaro.org>
This commit is contained in:
Harald Geyer 2015-04-17 14:43:24 +00:00 committed by Shawn Guo
parent 5ce667989a
commit 71a34d829c
1 changed files with 39 additions and 1 deletions
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40
arch/arm/boot/dts/imx23.dtsi
View File

@ -308,6 +308,39 @@
fsl,voltage = <MXS_VOLTAGE_HIGH>;
fsl,pull-up = <MXS_PULL_ENABLE>;
};
i2c_pins_a: i2c@0 {
reg = <0>;
fsl,pinmux-ids = <
MX23_PAD_I2C_SCL__I2C_SCL
MX23_PAD_I2C_SDA__I2C_SDA
>;
fsl,drive-strength = <MXS_DRIVE_8mA>;
fsl,voltage = <MXS_VOLTAGE_HIGH>;
fsl,pull-up = <MXS_PULL_ENABLE>;
};
i2c_pins_b: i2c@1 {
reg = <1>;
fsl,pinmux-ids = <
MX23_PAD_LCD_ENABLE__I2C_SCL
MX23_PAD_LCD_HSYNC__I2C_SDA
>;
fsl,drive-strength = <MXS_DRIVE_8mA>;
fsl,voltage = <MXS_VOLTAGE_HIGH>;
fsl,pull-up = <MXS_PULL_ENABLE>;
};
i2c_pins_c: i2c@2 {
reg = <2>;
fsl,pinmux-ids = <
MX23_PAD_SSP1_DATA1__I2C_SCL
MX23_PAD_SSP1_DATA2__I2C_SDA
>;
fsl,drive-strength = <MXS_DRIVE_8mA>;
fsl,voltage = <MXS_VOLTAGE_HIGH>;
fsl,pull-up = <MXS_PULL_ENABLE>;
};
};
digctl@8001c000 {
@ -444,8 +477,13 @@
status = "disabled";
};
i2c@80058000 {
i2c: i2c@80058000 {
#address-cells = <1>;
#size-cells = <0>;
compatible = "fsl,imx23-i2c";
reg = <0x80058000 0x2000>;
interrupts = <27>;
clock-frequency = <100000>;
dmas = <&dma_apbx 3>;
dma-names = "rx-tx";
status = "disabled";