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gpio: of: Add documentation of new sleep standard GPIO specifiers

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Add documentation of new GPIO specifiers indicating if the state of an
output pin should be maintained during sleep/low-power mode.

Signed-off-by: Charles Keepax <ckeepax@opensource.wolfsonmicro.com>
Acked-by: Laxman Dewangan <ldewangan@nvidia.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
This commit is contained in:
Charles Keepax 2017-05-23 15:47:31 +01:00 committed by Linus Walleij
parent 27a49ed17e
commit ca37978497
1 changed files with 2 additions and 0 deletions
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Documentation/devicetree/bindings/gpio/gpio.txt
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@ -80,6 +80,8 @@ Optional standard bitfield specifiers for the last cell:
https://en.wikipedia.org/wiki/Single-ended_triode
- Bit 2: 0 means open-source, 1 means open drain, see:
https://en.wikipedia.org/wiki/Open_collector
- Bit 3: 0 means the output should be maintained during sleep/low-power mode
1 means the output state can be lost during sleep/low-power mode
1.1) GPIO specifier best practices
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