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gpio: aspeed: Update documentation with ast2600 controllers 

The ast2600 is a new generation of SoC from ASPEED. Similarly to the
ast2400 and ast2500, it has a GPIO controller for it's 3.3V GPIO pins.
Additionally, it has a GPIO controller for 36 1.8V GPIO pins.  We use
the ngpio property to differentiate between these controllers.

Signed-off-by: Rashmica Gupta <rashmica.g@gmail.com>
Link: https://lore.kernel.org/r/20190906062547.13264-1-rashmica.g@gmail.com
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
This commit is contained in:
Rashmica Gupta 2019-09-06 16:25:47 +10:00 committed by Linus Walleij
parent 5fbe5b5883
commit da04c425e9
1 changed files with 5 additions and 2 deletions
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5
Documentation/devicetree/bindings/gpio/gpio-aspeed.txt
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@ -2,7 +2,8 @@ Aspeed GPIO controller Device Tree Bindings
-------------------------------------------
Required properties:
- compatible : Either "aspeed,ast2400-gpio" or "aspeed,ast2500-gpio"
- compatible : Either "aspeed,ast2400-gpio", "aspeed,ast2500-gpio",
or "aspeed,ast2600-gpio".
- #gpio-cells : Should be two
- First cell is the GPIO line number
@ -18,6 +19,8 @@ Required properties:
Optional properties:
- clocks : A phandle to the clock to use for debounce timings
- ngpios : Number of GPIOs controlled by this controller. Should be set
when there are multiple GPIO controllers on a SoC (ast2600).
The gpio and interrupt properties are further described in their respective
bindings documentation: