From mboxrd@z Thu Jan 1 00:00:00 1970 From: harald@ccbib.org (Harald Geyer) Date: Fri, 17 Apr 2015 14:43:24 +0000 Subject: [PATCHv2 1/2] ARM: dts: imx23: Add i2c support Message-ID: <1429281806-7934-1-git-send-email-harald@ccbib.org> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org 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 --- changes since v1: split in generic and board specific patches arch/arm/boot/dts/imx23.dtsi | 40 +++++++++++++++++++++++++++++++++++++++- 1 file changed, 39 insertions(+), 1 deletion(-) diff --git a/arch/arm/boot/dts/imx23.dtsi b/arch/arm/boot/dts/imx23.dtsi index bbcfb5a..c892d58 100644 --- a/arch/arm/boot/dts/imx23.dtsi +++ b/arch/arm/boot/dts/imx23.dtsi @@ -308,6 +308,39 @@ fsl,voltage = ; fsl,pull-up = ; }; + + 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 = ; + fsl,voltage = ; + fsl,pull-up = ; + }; + + 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 = ; + fsl,voltage = ; + fsl,pull-up = ; + }; + + 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 = ; + fsl,voltage = ; + fsl,pull-up = ; + }; }; digctl at 8001c000 { @@ -444,8 +477,13 @@ status = "disabled"; }; - i2c at 80058000 { + i2c: i2c at 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"; -- 1.7.10.4