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-I2C for Atmel platforms
-
-Required properties :
-- compatible : Must be one of:
- "atmel,at91rm9200-i2c",
- "atmel,at91sam9261-i2c",
- "atmel,at91sam9260-i2c",
- "atmel,at91sam9g20-i2c",
- "atmel,at91sam9g10-i2c",
- "atmel,at91sam9x5-i2c",
- "atmel,sama5d4-i2c",
- "atmel,sama5d2-i2c",
- "microchip,sam9x60-i2c".
-- reg: physical base address of the controller and length of memory mapped
- region.
-- interrupts: interrupt number to the cpu.
-- #address-cells = <1>;
-- #size-cells = <0>;
-- clocks: phandles to input clocks.
-
-Optional properties:
-- clock-frequency: Desired I2C bus frequency in Hz, otherwise defaults to 100000
-- dmas: A list of two dma specifiers, one for each entry in dma-names.
-- dma-names: should contain "tx" and "rx".
-- atmel,fifo-size: maximum number of data the RX and TX FIFOs can store for FIFO
- capable I2C controllers.
-- i2c-sda-hold-time-ns: TWD hold time, only available for:
- "atmel,sama5d4-i2c",
- "atmel,sama5d2-i2c",
- "microchip,sam9x60-i2c".
-- 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
-- Child nodes conforming to i2c bus binding
-
-
-Examples :
-
-i2c0: i2c@fff84000 {
- compatible = "atmel,at91sam9g20-i2c";
- reg = <0xfff84000 0x100>;
- interrupts = <12 4 6>;
- #address-cells = <1>;
- #size-cells = <0>;
- clocks = <&twi0_clk>;
- clock-frequency = <400000>;
-
- 24c512@50 {
- compatible = "atmel,24c512";
- reg = <0x50>;
- pagesize = <128>;
- }
-}
-
-i2c0: i2c@f8034600 {
- compatible = "atmel,sama5d2-i2c";
- reg = <0xf8034600 0x100>;
- interrupts = <19 IRQ_TYPE_LEVEL_HIGH 7>;
- dmas = <&dma0
- (AT91_XDMAC_DT_MEM_IF(0) | AT91_XDMAC_DT_PER_IF(1))
- AT91_XDMAC_DT_PERID(11)>,
- <&dma0
- (AT91_XDMAC_DT_MEM_IF(0) | AT91_XDMAC_DT_PER_IF(1))
- AT91_XDMAC_DT_PERID(12)>;
- dma-names = "tx", "rx";
- #address-cells = <1>;
- #size-cells = <0>;
- clocks = <&flx0>;
- atmel,fifo-size = <16>;
- i2c-sda-hold-time-ns = <336>;
- pinctrl-names = "default", "gpio";
- pinctrl-0 = <&pinctrl_i2c0>;
- pinctrl-1 = <&pinctrl_i2c0_gpio>;
- sda-gpios = <&pioA 30 GPIO_ACTIVE_HIGH>;
- scl-gpios = <&pioA 31 (GPIO_ACTIVE_HIGH | GPIO_OPEN_DRAIN)>;
-
- wm8731: wm8731@1a {
- compatible = "wm8731";
- reg = <0x1a>;
- };
-};