[PATCH] ARM: dts: imx23-olinuxino: Add i2c support

[Stefan Wahren]

Hi Harald,

[ add devicetree mailinglist ]

> Harald Geyer <harald at ccbib.org> hat am 8. April 2015 um 19:45 geschrieben:
>
>
> The imx23-olinuxino board has an i2c interface exposed on UEXT connector.

AFAIK the iMX233-OLinuXino-MICRO don't have a UEXT connector. Maybe we reached
the point 
to make dts files for every Olinuxino board. In that case we could also handle
the USB Host / Peripherial issue.

> This patch provides the necessary devicetree code.
> Tested 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 at ccbib.org>
> ---
> arch/arm/boot/dts/imx23-olinuxino.dts | 6 +++++
> arch/arm/boot/dts/imx23.dtsi | 40 ++++++++++++++++++++++++++++++++-
> 2 files changed, 45 insertions(+), 1 deletion(-)
>
> [...]
> --- a/arch/arm/boot/dts/imx23.dtsi
> +++ b/arch/arm/boot/dts/imx23.dtsi
> @@ -308,6 +308,39 @@
> fsl,voltage = <MXS_VOLTAGE_HIGH>;
> fsl,pull-up = <MXS_PULL_ENABLE>;
> };
> +
> + i2c_pins_a: i2c at 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 at 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 at 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>;
> + };

Please add only i2c_pins_b because this pin muxing is the only used one.

Thanks Stefan