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| author | Linus Walleij <linus.walleij@linaro.org> | 2019-02-14 10:45:22 +0300 |
|---|---|---|
| committer | Linus Walleij <linus.walleij@linaro.org> | 2019-02-14 10:45:22 +0300 |
| commit | 92de6bc3a82df2e745c46155e8334659f871ea6f (patch) | |
| tree | 7f447f88a325a52517317124cc0f8d4d391eebb7 /Documentation/devicetree/bindings/gpio | |
| parent | 5340f23df8fe27a270af3fa1a93cd07293d23dd9 (diff) | |
| parent | 15add06841a3b0b4734a72847a73c71fd09ebe52 (diff) | |
| download | linux-92de6bc3a82df2e745c46155e8334659f871ea6f.tar.xz | |
Merge branch 'ib-pca953x-config' into devel
Diffstat (limited to 'Documentation/devicetree/bindings/gpio')
| -rw-r--r-- | Documentation/devicetree/bindings/gpio/gpio.txt | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/gpio/gpio.txt b/Documentation/devicetree/bindings/gpio/gpio.txt index f0ba154b5723..a8895d339bfe 100644 --- a/Documentation/devicetree/bindings/gpio/gpio.txt +++ b/Documentation/devicetree/bindings/gpio/gpio.txt @@ -67,6 +67,18 @@ Optional standard bitfield specifiers for the last cell: 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 +- Bit 4: 0 means no pull-up resistor should be enabled + 1 means a pull-up resistor should be enabled + This setting only applies to hardware with a simple on/off + control for pull-up configuration. If the hardware has more + elaborate pull-up configuration, it should be represented + using a pin control binding. +- Bit 5: 0 means no pull-down resistor should be enabled + 1 means a pull-down resistor should be enabled + This setting only applies to hardware with a simple on/off + control for pull-down configuration. If the hardware has more + elaborate pull-down configuration, it should be represented + using a pin control binding. 1.1) GPIO specifier best practices ---------------------------------- |