| * Freescale (Enhanced) Configurable Serial Peripheral Interface |
| (CSPI/eCSPI) for i.MX |
| |
| Required properties: |
| - compatible : |
| - "fsl,imx1-cspi" for SPI compatible with the one integrated on i.MX1 |
| - "fsl,imx21-cspi" for SPI compatible with the one integrated on i.MX21 |
| - "fsl,imx27-cspi" for SPI compatible with the one integrated on i.MX27 |
| - "fsl,imx31-cspi" for SPI compatible with the one integrated on i.MX31 |
| - "fsl,imx35-cspi" for SPI compatible with the one integrated on i.MX35 |
| - "fsl,imx51-ecspi" for SPI compatible with the one integrated on i.MX51 |
| - reg : Offset and length of the register set for the device |
| - interrupts : Should contain CSPI/eCSPI interrupt |
| - cs-gpios : Specifies the gpio pins to be used for chipselects. |
| - clocks : Clock specifiers for both ipg and per clocks. |
| - clock-names : Clock names should include both "ipg" and "per" |
| See the clock consumer binding, |
| Documentation/devicetree/bindings/clock/clock-bindings.txt |
| - dmas: DMA specifiers for tx and rx dma. See the DMA client binding, |
| Documentation/devicetree/bindings/dma/dma.txt |
| - dma-names: DMA request names should include "tx" and "rx" if present. |
| |
| Obsolete properties: |
| - fsl,spi-num-chipselects : Contains the number of the chipselect |
| |
| Optional properties: |
| - fsl,spi-rdy-drctl: Integer, representing the value of DRCTL, the register |
| controlling the SPI_READY handling. Note that to enable the DRCTL consideration, |
| the SPI_READY mode-flag needs to be set too. |
| Valid values are: 0 (disabled), 1 (edge-triggered burst) and 2 (level-triggered burst). |
| |
| Example: |
| |
| ecspi@70010000 { |
| #address-cells = <1>; |
| #size-cells = <0>; |
| compatible = "fsl,imx51-ecspi"; |
| reg = <0x70010000 0x4000>; |
| interrupts = <36>; |
| cs-gpios = <&gpio3 24 0>, /* GPIO3_24 */ |
| <&gpio3 25 0>; /* GPIO3_25 */ |
| dmas = <&sdma 3 7 1>, <&sdma 4 7 2>; |
| dma-names = "rx", "tx"; |
| fsl,spi-rdy-drctl = <1>; |
| }; |
