mirror of
https://github.com/torvalds/linux.git
synced 2024-12-24 20:01:55 +00:00
9231b4603e
Document SoC specific bindings for R-Car RZ/G1C(r8a77470) SoC. Signed-off-by: Cao Van Dong <cv-dong@jinso.co.jp> Signed-off-by: Mark Brown <broonie@kernel.org>
106 lines
3.9 KiB
Plaintext
106 lines
3.9 KiB
Plaintext
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>;
|
|
};
|