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dt-bindings: pinctrl: Document pinconf bindings for BM1880 SoC

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Document pinconf bindings for Bitmain BM1880 SoC.

Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
This commit is contained in:
Manivannan Sadhasivam 2019-05-20 14:01:00 +05:30 committed by Linus Walleij
parent 8247b2474b
commit 752a74038d
1 changed files with 18 additions and 1 deletions
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19
Documentation/devicetree/bindings/pinctrl/bitmain,bm1880-pinctrl.txt
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@ -14,7 +14,8 @@ phrase "pin configuration node".
The pin configuration nodes act as a container for an arbitrary number of
subnodes. Each of these subnodes represents some desired configuration for a
pin, a group, or a list of pins or groups. This configuration for BM1880 SoC
includes only pinmux as there is no pinconf support available in SoC.
includes pinmux and various pin configuration parameters, such as pull-up,
slew rate etc...
Each configuration node can consist of multiple nodes describing the pinmux
options. The name of each subnode is not important; all subnodes should be
@ -84,6 +85,22 @@ Required Properties:
gpio66, gpio67, eth1, i2s0, i2s0_mclkin, i2s1, i2s1_mclkin,
spi0
Optional Properties:
- bias-disable: No arguments. Disable pin bias.
- bias-pull-down: No arguments. The specified pins should be configured as
pull down.
- bias-pull-up: No arguments. The specified pins should be configured as
pull up.
- input-schmitt-enable: No arguments: Enable schmitt trigger for the specified
pins
- input-schmitt-disable: No arguments: Disable schmitt trigger for the specified
pins
- slew-rate: Integer. Sets slew rate for the specified pins.
Valid values are:
<0> - Slow
<1> - Fast
Example:
pinctrl: pinctrl@400 {
compatible = "bitmain,bm1880-pinctrl";