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Unverified Commit 77a06053 authored by Linus Walleij's avatar Linus Walleij Committed by Mark Brown
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spi: spi-gpio: Augment device tree bindings 



After we augmented the core to handle "gpio-sck"/"sck-gpios",
"gpio-mosi"/"mosi-gpios", "gpio-miso"/"miso-gpios" alike,
deprecate the old binding and put the strict modern and
recommended binding practice into place as the default for
GPIO-based SPI.

This reflects the similar change in I2C:
commit 7d29f509
("dt-bindings: i2c: i2c-gpio: Add support for named gpios")

Signed-off-by: default avatarLinus Walleij <linus.walleij@linaro.org>
Reviewed-by: default avatarAndy Shevchenko <andy.shevchenko@gmail.com>
Signed-off-by: default avatarMark Brown <broonie@kernel.org>
parent 9b00bc7b

Documentation/devicetree/bindings/spi/spi-gpio.txt

+18 −6
Original line number Diff line number Diff line 
SPI-GPIO devicetree bindings



This represents a group of 3-n GPIO lines used for bit-banged SPI on dedicated

GPIO lines.



Required properties:



 - compatible: should be set to "spi-gpio"

 - #address-cells: should be set to <0x1>

 - ranges

 - gpio-sck: GPIO spec for the SCK line to use

 - gpio-miso: GPIO spec for the MISO line to use

 - gpio-mosi: GPIO spec for the MOSI line to use

 - sck-gpios: GPIO spec for the SCK line to use

 - miso-gpios: GPIO spec for the MISO line to use

 - mosi-gpios: GPIO spec for the MOSI line to use

 - cs-gpios: GPIOs to use for chipselect lines.

             Not needed if num-chipselects = <0>.

 - num-chipselects: Number of chipselect lines. Should be <0> if a single device

                    with no chip select is connected.



Deprecated bindings:



These legacy GPIO line bindings can alternatively be used to define the

GPIO lines used, they should not be used in new device trees.



 - gpio-sck: GPIO spec for the SCK line to use

 - gpio-miso: GPIO spec for the MISO line to use

 - gpio-mosi: GPIO spec for the MOSI line to use



Example:



	spi {
@@ -20,9 +32,9 @@ Example: 
		#address-cells = <0x1>;

		ranges;



		gpio-sck = <&gpio 95 0>;

		gpio-miso = <&gpio 98 0>;

		gpio-mosi = <&gpio 97 0>;

		sck-gpios = <&gpio 95 0>;

		miso-gpios = <&gpio 98 0>;

		mosi-gpios = <&gpio 97 0>;

		cs-gpios = <&gpio 125 0>;

		num-chipselects = <1>;