diff options
| author | Miquel Raynal <miquel.raynal@free-electrons.com> | 2017-12-29 15:55:55 +0100 |
|---|---|---|
| committer | Jagan Teki <jagan@amarulasolutions.com> | 2018-01-10 12:06:15 +0530 |
| commit | 32466c445c49b489b09f99b4ae9b440d76d4720f (patch) | |
| tree | 630ec1bea2d4e704161c7b8bd8649f555ed0d1dd /doc | |
| parent | 98691a60abffb44303d7dae6e9e699d0daded930 (diff) | |
doc: bindings: soft-spi: update documentation to match the code
Linux bindings have been introduced in the code (removing the U-Boot
specific ones) without documentation update. Compatible string has
changed, as well as the four GPIO properties. Reflect this by updating
the soft-spi.txt documentation.
Fixes: 102412c415 ("dm: spi: soft_spi: switch to use linux compatible string")
Signed-off-by: Miquel Raynal <miquel.raynal@free-electrons.com>
Reviewed-by: Jagan Teki <jagan@amarulasolutions.com>
Diffstat (limited to 'doc')
| -rw-r--r-- | doc/device-tree-bindings/spi/soft-spi.txt | 24 |
1 files changed, 14 insertions, 10 deletions
diff --git a/doc/device-tree-bindings/spi/soft-spi.txt b/doc/device-tree-bindings/spi/soft-spi.txt index d09c1a5076..dfb5066473 100644 --- a/doc/device-tree-bindings/spi/soft-spi.txt +++ b/doc/device-tree-bindings/spi/soft-spi.txt @@ -6,11 +6,15 @@ performance will typically be much lower than a real SPI bus. The soft SPI node requires the following properties: -compatible: "u-boot,soft-spi" -soft_spi_cs: GPIO number to use for SPI chip select (output) -soft_spi_sclk: GPIO number to use for SPI clock (output) -soft_spi_mosi: GPIO number to use for SPI MOSI line (output) -soft_spi_miso GPIO number to use for SPI MISO line (input) +Mandatory properties: +compatible: "spi-gpio" +cs-gpios: GPIOs to use for SPI chip select (output) +gpio-sck: GPIO to use for SPI clock (output) +And at least one of: +gpio-mosi: GPIO to use for SPI MOSI line (output) +gpio-miso: GPIO to use for SPI MISO line (input) + +Optional propertie: spi-delay-us: Number of microseconds of delay between each CS transition The GPIOs should be specified as required by the GPIO controller referenced. @@ -21,11 +25,11 @@ typically holds the GPIO number. Example: soft-spi { - compatible = "u-boot,soft-spi"; - cs-gpio = <&gpio 235 0>; /* Y43 */ - sclk-gpio = <&gpio 225 0>; /* Y31 */ - mosi-gpio = <&gpio 227 0>; /* Y33 */ - miso-gpio = <&gpio 224 0>; /* Y30 */ + compatible = "spi-gpio"; + cs-gpios = <&gpio 235 0>; /* Y43 */ + gpio-sck = <&gpio 225 0>; /* Y31 */ + gpio-mosi = <&gpio 227 0>; /* Y33 */ + gpio-miso = <&gpio 224 0>; /* Y30 */ spi-delay-us = <1>; #address-cells = <1>; #size-cells = <0>; |