diff options
Diffstat (limited to 'doc')
| -rw-r--r-- | doc/device-tree-bindings/spi/soft-spi.txt | 24 | ||||
| -rw-r--r-- | doc/device-tree-bindings/spi/spi-cadence.txt | 13 |
2 files changed, 22 insertions, 15 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>; diff --git a/doc/device-tree-bindings/spi/spi-cadence.txt b/doc/device-tree-bindings/spi/spi-cadence.txt index c1e2233d7c..74c82080fc 100644 --- a/doc/device-tree-bindings/spi/spi-cadence.txt +++ b/doc/device-tree-bindings/spi/spi-cadence.txt @@ -6,7 +6,10 @@ Required properties: - reg : 1.Physical base address and size of SPI registers map. 2. Physical base address & size of NOR Flash. - clocks : Clock phandles (see clock bindings for details). -- sram-size : spi controller sram size. +- cdns,fifo-depth : Size of the data FIFO in words. +- cdns,fifo-width : Bus width of the data FIFO in bytes. +- cdns,trigger-address : 32-bit indirect AHB trigger address. +- cdns,is-decoded-cs : Flag to indicate whether decoder is used or not. - status : enable in requried dts. connected flash properties @@ -15,14 +18,14 @@ connected flash properties - spi-max-frequency : Max supported spi frequency. - page-size : Flash page size. - block-size : Flash memory block size. -- tshsl-ns : Added delay in master reference clocks (ref_clk) for +- cdns,tshsl-ns : Added delay in master reference clocks (ref_clk) for the length that the master mode chip select outputs are de-asserted between transactions. -- tsd2d-ns : Delay in master reference clocks (ref_clk) between one +- cdns,tsd2d-ns : Delay in master reference clocks (ref_clk) between one chip select being de-activated and the activation of another. -- tchsh-ns : Delay in master reference clocks between last bit of +- cdns,tchsh-ns : Delay in master reference clocks between last bit of current transaction and de-asserting the device chip select (n_ss_out). -- tslch-ns : Delay in master reference clocks between setting +- cdns,tslch-ns : Delay in master reference clocks between setting n_ss_out low and first bit transfer |