Commit 71a34d82 authored by Harald Geyer's avatar Harald Geyer Committed by Shawn Guo
Browse files

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: default avatarHarald Geyer <harald@ccbib.org>
Acked-by: default avatarStefan Wahren <stefan.wahren@i2se.com>
Acked-by: default avatarMarek Vasut <marex@denx.de>
Signed-off-by: default avatarShawn Guo <shawn.guo@linaro.org>
parent 5ce66798

arch/arm/boot/dts/imx23.dtsi

+39 −1
Original line number Diff line number Diff line
@@ -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";

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