0001 * Device tree bindings for Atmel Flexcom (Flexible Serial Communication Unit)
0002
0003 The Atmel Flexcom is just a wrapper which embeds a SPI controller, an I2C
0004 controller and an USART. Only one function can be used at a time and is chosen
0005 at boot time according to the device tree.
0006
0007 Required properties:
0008 - compatible: Should be "atmel,sama5d2-flexcom"
0009 - reg: Should be the offset/length value for Flexcom dedicated
0010 I/O registers (without USART, TWI or SPI registers).
0011 - clocks: Should be the Flexcom peripheral clock from PMC.
0012 - #address-cells: Should be <1>
0013 - #size-cells: Should be <1>
0014 - ranges: Should be one range for the full I/O register region
0015 (including USART, TWI and SPI registers).
0016 - atmel,flexcom-mode: Should be one of the following values:
0017 - <1> for USART
0018 - <2> for SPI
0019 - <3> for I2C
0020
0021 Required child:
0022 A single available child device of type matching the "atmel,flexcom-mode"
0023 property.
0024
0025 The phandle provided by the clocks property of the child is the same as one for
0026 the Flexcom parent.
0027
0028 For other properties, please refer to the documentations of the respective
0029 device:
0030 - ../serial/atmel-usart.txt
0031 - ../spi/spi_atmel.txt
0032 - ../i2c/i2c-at91.txt
0033
0034 Example:
0035
0036 flexcom@f8034000 {
0037 compatible = "atmel,sama5d2-flexcom";
0038 reg = <0xf8034000 0x200>;
0039 clocks = <&flx0_clk>;
0040 #address-cells = <1>;
0041 #size-cells = <1>;
0042 ranges = <0x0 0xf8034000 0x800>;
0043 atmel,flexcom-mode = <2>;
0044
0045 spi@400 {
0046 compatible = "atmel,at91rm9200-spi";
0047 reg = <0x400 0x200>;
0048 interrupts = <19 IRQ_TYPE_LEVEL_HIGH 7>;
0049 pinctrl-names = "default";
0050 pinctrl-0 = <&pinctrl_flx0_default>;
0051 #address-cells = <1>;
0052 #size-cells = <0>;
0053 clocks = <&flx0_clk>;
0054 clock-names = "spi_clk";
0055 atmel,fifo-size = <32>;
0056
0057 flash@0 {
0058 compatible = "atmel,at25f512b";
0059 reg = <0>;
0060 spi-max-frequency = <20000000>;
0061 };
0062 };
0063 };
