diff options
Diffstat (limited to '')
| -rw-r--r-- | Documentation/devicetree/bindings/i2c/i2c-imx.txt | 49 |
1 files changed, 49 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/i2c/i2c-imx.txt b/Documentation/devicetree/bindings/i2c/i2c-imx.txt new file mode 100644 index 000000000..b96754459 --- /dev/null +++ b/Documentation/devicetree/bindings/i2c/i2c-imx.txt @@ -0,0 +1,49 @@ +* Freescale Inter IC (I2C) and High Speed Inter IC (HS-I2C) for i.MX + +Required properties: +- compatible : + - "fsl,imx1-i2c" for I2C compatible with the one integrated on i.MX1 SoC + - "fsl,imx21-i2c" for I2C compatible with the one integrated on i.MX21 SoC + - "fsl,vf610-i2c" for I2C compatible with the one integrated on Vybrid vf610 SoC +- reg : Should contain I2C/HS-I2C registers location and length +- interrupts : Should contain I2C/HS-I2C interrupt +- clocks : Should contain the I2C/HS-I2C clock specifier + +Optional properties: +- clock-frequency : Constains desired I2C/HS-I2C bus clock frequency in Hz. + The absence of the property indicates the default frequency 100 kHz. +- dmas: A list of two dma specifiers, one for each entry in dma-names. +- dma-names: should contain "tx" and "rx". +- scl-gpios: specify the gpio related to SCL pin +- sda-gpios: specify the gpio related to SDA pin +- pinctrl: add extra pinctrl to configure i2c pins to gpio function for i2c + bus recovery, call it "gpio" state + +Examples: + +i2c@83fc4000 { /* I2C2 on i.MX51 */ + compatible = "fsl,imx51-i2c", "fsl,imx21-i2c"; + reg = <0x83fc4000 0x4000>; + interrupts = <63>; +}; + +i2c@70038000 { /* HS-I2C on i.MX51 */ + compatible = "fsl,imx51-i2c", "fsl,imx21-i2c"; + reg = <0x70038000 0x4000>; + interrupts = <64>; + clock-frequency = <400000>; +}; + +i2c0: i2c@40066000 { /* i2c0 on vf610 */ + compatible = "fsl,vf610-i2c"; + reg = <0x40066000 0x1000>; + interrupts =<0 71 0x04>; + dmas = <&edma0 0 50>, + <&edma0 0 51>; + dma-names = "rx","tx"; + pinctrl-names = "default", "gpio"; + pinctrl-0 = <&pinctrl_i2c1>; + pinctrl-1 = <&pinctrl_i2c1_gpio>; + scl-gpios = <&gpio5 26 GPIO_ACTIVE_HIGH>; + sda-gpios = <&gpio5 27 GPIO_ACTIVE_HIGH>; +}; |