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>

diff --git a/doc/device-tree-bindings/spi/soft-spi.txt b/doc/device-tree-bindings/spi/soft-spi.txt
index d09c1a507659bfb78222c062fcf46b59edd41365..dfb50664732f79bb723bdc52a1ad709bcfc90a5d 100644 (file)
--- 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>;