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-Renesas MSIOF spi controller
-
-Required properties:
-- compatible : "renesas,msiof-r8a7743" (RZ/G1M)
- "renesas,msiof-r8a7744" (RZ/G1N)
- "renesas,msiof-r8a7745" (RZ/G1E)
- "renesas,msiof-r8a77470" (RZ/G1C)
- "renesas,msiof-r8a774a1" (RZ/G2M)
- "renesas,msiof-r8a774c0" (RZ/G2E)
- "renesas,msiof-r8a7790" (R-Car H2)
- "renesas,msiof-r8a7791" (R-Car M2-W)
- "renesas,msiof-r8a7792" (R-Car V2H)
- "renesas,msiof-r8a7793" (R-Car M2-N)
- "renesas,msiof-r8a7794" (R-Car E2)
- "renesas,msiof-r8a7795" (R-Car H3)
- "renesas,msiof-r8a7796" (R-Car M3-W)
- "renesas,msiof-r8a77965" (R-Car M3-N)
- "renesas,msiof-r8a77970" (R-Car V3M)
- "renesas,msiof-r8a77980" (R-Car V3H)
- "renesas,msiof-r8a77990" (R-Car E3)
- "renesas,msiof-r8a77995" (R-Car D3)
- "renesas,msiof-sh73a0" (SH-Mobile AG5)
- "renesas,sh-mobile-msiof" (generic SH-Mobile compatibile device)
- "renesas,rcar-gen2-msiof" (generic R-Car Gen2 and RZ/G1 compatible device)
- "renesas,rcar-gen3-msiof" (generic R-Car Gen3 and RZ/G2 compatible device)
- "renesas,sh-msiof" (deprecated)
-
- When compatible with the generic version, nodes
- must list the SoC-specific version corresponding
- to the platform first followed by the generic
- version.
-
-- reg : A list of offsets and lengths of the register sets for
- the device.
- If only one register set is present, it is to be used
- by both the CPU and the DMA engine.
- If two register sets are present, the first is to be
- used by the CPU, and the second is to be used by the
- DMA engine.
-- interrupts : Interrupt specifier
-- #address-cells : Must be <1>
-- #size-cells : Must be <0>
-
-Optional properties:
-- clocks : Must contain a reference to the functional clock.
-- num-cs : Total number of chip selects (default is 1).
- Up to 3 native chip selects are supported:
- 0: MSIOF_SYNC
- 1: MSIOF_SS1
- 2: MSIOF_SS2
- Hardware limitations related to chip selects:
- - Native chip selects are always deasserted in
- between transfers that are part of the same
- message. Use cs-gpios to work around this.
- - All slaves using native chip selects must use the
- same spi-cs-high configuration. Use cs-gpios to
- work around this.
- - When using GPIO chip selects, at least one native
- chip select must be left unused, as it will be
- driven anyway.
-- dmas : Must contain a list of two references to DMA
- specifiers, one for transmission, and one for
- reception.
-- dma-names : Must contain a list of two DMA names, "tx" and "rx".
-- spi-slave : Empty property indicating the SPI controller is used
- in slave mode.
-- renesas,dtdl : delay sync signal (setup) in transmit mode.
- Must contain one of the following values:
- 0 (no bit delay)
- 50 (0.5-clock-cycle delay)
- 100 (1-clock-cycle delay)
- 150 (1.5-clock-cycle delay)
- 200 (2-clock-cycle delay)
-
-- renesas,syncdl : delay sync signal (hold) in transmit mode.
- Must contain one of the following values:
- 0 (no bit delay)
- 50 (0.5-clock-cycle delay)
- 100 (1-clock-cycle delay)
- 150 (1.5-clock-cycle delay)
- 200 (2-clock-cycle delay)
- 300 (3-clock-cycle delay)
-
-Optional properties, deprecated for soctype-specific bindings:
-- renesas,tx-fifo-size : Overrides the default tx fifo size given in words
- (default is 64)
-- renesas,rx-fifo-size : Overrides the default rx fifo size given in words
- (default is 64)
-
-Pinctrl properties might be needed, too. See
-Documentation/devicetree/bindings/pinctrl/renesas,*.
-
-Example:
-
- msiof0: spi@e6e20000 {
- compatible = "renesas,msiof-r8a7791",
- "renesas,rcar-gen2-msiof";
- reg = <0 0xe6e20000 0 0x0064>;
- interrupts = <0 156 IRQ_TYPE_LEVEL_HIGH>;
- clocks = <&mstp0_clks R8A7791_CLK_MSIOF0>;
- dmas = <&dmac0 0x51>, <&dmac0 0x52>;
- dma-names = "tx", "rx";
- #address-cells = <1>;
- #size-cells = <0>;
- };