mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-27 05:55:18 +07:00
8ae13d0b0d
This this is used to let the SPI master know that our FIFO is filled and we're ready to service a transfer. Only useful in slave mode. A signal like this is used by an embedded controller on a OLPC XO 1.75 machine, that happens to be a SPI master. Signed-off-by: Lubomir Rintel <lkundrak@v3.sk> Acked-by: Pavel Machek <pavel@ucw.cz> Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be> Signed-off-by: Mark Brown <broonie@kernel.org>
28 lines
958 B
Plaintext
28 lines
958 B
Plaintext
PXA2xx SSP SPI Controller
|
|
|
|
Required properties:
|
|
- compatible: Must be "marvell,mmp2-ssp".
|
|
- reg: Offset and length of the device's register set.
|
|
- interrupts: Should be the interrupt number.
|
|
- clocks: Should contain a single entry describing the clock input.
|
|
- #address-cells: Number of cells required to define a chip select address.
|
|
- #size-cells: Should be zero.
|
|
|
|
Optional properties:
|
|
- cs-gpios: list of GPIO chip selects. See the SPI bus bindings,
|
|
Documentation/devicetree/bindings/spi/spi-bus.txt
|
|
- spi-slave: Empty property indicating the SPI controller is used in slave mode.
|
|
- ready-gpios: GPIO used to signal a SPI master that the FIFO is filled
|
|
and we're ready to service a transfer. Only useful in slave mode.
|
|
|
|
Child nodes represent devices on the SPI bus
|
|
See ../spi/spi-bus.txt
|
|
|
|
Example:
|
|
ssp1: spi@d4035000 {
|
|
compatible = "marvell,mmp2-ssp";
|
|
reg = <0xd4035000 0x1000>;
|
|
clocks = <&soc_clocks MMP2_CLK_SSP0>;
|
|
interrupts = <0>;
|
|
};
|