diff options
Diffstat (limited to 'doc/device-tree-bindings/spi/soft-spi.txt')
| -rw-r--r-- | doc/device-tree-bindings/spi/soft-spi.txt | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/doc/device-tree-bindings/spi/soft-spi.txt b/doc/device-tree-bindings/spi/soft-spi.txt index bdf7e86befb..77b01b2fd9a 100644 --- a/doc/device-tree-bindings/spi/soft-spi.txt +++ b/doc/device-tree-bindings/spi/soft-spi.txt @@ -8,14 +8,15 @@ The soft SPI node requires the following properties: Mandatory properties: compatible: "spi-gpio" -cs-gpios: GPIOs to use for SPI chip select (output) +cs-gpios: GPIOs to use for SPI chip select (output), not required if num-chipselects = <0> sck-gpios: GPIO to use for SPI clock (output) And at least one of: mosi-gpios: GPIO to use for SPI MOSI line (output) miso-gpios: GPIO to use for SPI MISO line (input) -Optional propertie: +Optional properties: spi-delay-us: Number of microseconds of delay between each CS transition +num-chipselects: Number of chipselect lines The GPIOs should be specified as required by the GPIO controller referenced. The first cell holds the phandle of the controller and the second cell |