Messages in this thread Patch in this message | | | Date | Wed, 28 Nov 2012 15:24:03 +0100 | From | "sander van ginkel" <> | Subject | [PATCH] add hardware I2C support for ARM IMX23 |
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The I2C hardware in the IMX233 is currently not supported, however the i2c-mxs driver seems to be suitable. To use the i2c-mxs driver it has to be added to the devicetree for the IMX23.
Signed-off-by: Sander van Ginkel <sander@van-ginkel.eu> --- diff -Naur linux-3.7-rc6/arch/arm/boot/dts/imx23-olinuxino.dts linux-3.7-rc6-i2c/arch/arm/boot/dts/imx23-olinuxino.dts --- linux-3.7-rc6/arch/arm/boot/dts/imx23-olinuxino.dts 2012-11-17 01:42:40.000000000 +0000 +++ linux-3.7-rc6-i2c/arch/arm/boot/dts/imx23-olinuxino.dts 2012-11-24 22:40:51.000000000 +0000 @@ -50,6 +50,13 @@ };
apbx@80040000 { + + i2c0: i2c@80058000 { + pinctrl-names = "default"; + pinctrl-0 = <&i2c0_pins_a>; + status = "okay"; + }; + duart: serial@80070000 { pinctrl-names = "default"; pinctrl-0 = <&duart_pins_a>; diff -Naur linux-3.7-rc6/arch/arm/boot/dts/imx23.dtsi linux-3.7-rc6-i2c/arch/arm/boot/dts/imx23.dtsi --- linux-3.7-rc6/arch/arm/boot/dts/imx23.dtsi 2012-11-17 01:42:40.000000000 +0000 +++ linux-3.7-rc6-i2c/arch/arm/boot/dts/imx23.dtsi 2012-11-24 22:40:51.000000000 +0000 @@ -144,6 +144,17 @@ fsl,pull-up = <0>; };
+ i2c0_pins_a: i2c0@0 { + reg = <0>; + fsl,pinmux-ids = < + 0x1171 /* MX23_PAD_LCD_ENABLE__I2C_SCL */ + 0x1181 /* MX23_PAD_LCD_HSYNC__I2C_SDA */ + >; + fsl,drive-strength = <1>; + fsl,voltage = <1>; + fsl,pull-up = <1>; + }; + auart0_2pins_a: auart0-2pins@0 { reg = <0>; fsl,pinmux-ids = < @@ -387,9 +398,15 @@ status = "disabled"; };
- i2c@80058000 { + i2c0: i2c@80058000 { + #address-cells = <2>; + #size-cells = <1>; + compatible = "fsl,imx28-i2c"; reg = <0x80058000 0x2000>; + interrupts = <26 27>; + clock-frequency = <100000>; status = "disabled"; + fsl,i2c-dma-channel = <3>; };
rtc@8005c000 {
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