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| author | Emmanuel Vadot <manu@FreeBSD.org> | 2019-05-08 19:00:46 +0000 |
|---|---|---|
| committer | Emmanuel Vadot <manu@FreeBSD.org> | 2019-05-08 19:00:46 +0000 |
| commit | 0db636cb5e9747c177d4fe9ae36c20987819a1b6 (patch) | |
| tree | b45f33ee0918192a1d0373c223d19aa906875c98 /Bindings/gpio/gpio.txt | |
| parent | 2131505c51f1ac8ac0a6db71efcda1b4bd61084b (diff) | |
| download | src-0db636cb5e9747c177d4fe9ae36c20987819a1b6.tar.gz src-0db636cb5e9747c177d4fe9ae36c20987819a1b6.zip | |
Notes
Diffstat (limited to 'Bindings/gpio/gpio.txt')
| -rw-r--r-- | Bindings/gpio/gpio.txt | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/Bindings/gpio/gpio.txt b/Bindings/gpio/gpio.txt index f0ba154b5723..a8895d339bfe 100644 --- a/Bindings/gpio/gpio.txt +++ b/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 ---------------------------------- |