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| author | Lucas Stach <l.stach@pengutronix.de> | 2017-07-31 20:03:05 +0200 |
|---|---|---|
| committer | Lucas Stach <l.stach@pengutronix.de> | 2017-07-31 20:03:05 +0200 |
| commit | d14b844b08635c717fb52a294ed8d6872e260315 (patch) | |
| tree | 18607dcdd29688b2fa9528f79423183a68e9898d /dts/Bindings/gpio/gpio.txt | |
| parent | 858b797e529e26c19bfa893fdb37ed67ff7a6006 (diff) | |
| download | barebox-d14b844b08635c717fb52a294ed8d6872e260315.tar.gz barebox-d14b844b08635c717fb52a294ed8d6872e260315.tar.xz | |
dts: update to v4.13-rc2
Signed-off-by: Lucas Stach <l.stach@pengutronix.de>
Diffstat (limited to 'dts/Bindings/gpio/gpio.txt')
| -rw-r--r-- | dts/Bindings/gpio/gpio.txt | 13 |
1 files changed, 8 insertions, 5 deletions
diff --git a/dts/Bindings/gpio/gpio.txt b/dts/Bindings/gpio/gpio.txt index 84ede036f7..802402f6cc 100644 --- a/dts/Bindings/gpio/gpio.txt +++ b/dts/Bindings/gpio/gpio.txt @@ -74,11 +74,14 @@ GPIO pin number, and GPIO flags as accepted by the "qe_pio_e" gpio-controller. Optional standard bitfield specifiers for the last cell: - Bit 0: 0 means active high, 1 means active low -- Bit 1: 1 means single-ended wiring, see: +- Bit 1: 0 mean push-pull wiring, see: + https://en.wikipedia.org/wiki/Push-pull_output + 1 means single-ended wiring, see: https://en.wikipedia.org/wiki/Single-ended_triode - When used with active-low, this means open drain/collector, see: +- Bit 2: 0 means open-source, 1 means open drain, see: https://en.wikipedia.org/wiki/Open_collector - When used with active-high, this means open source/emitter +- 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 ---------------------------------- @@ -282,8 +285,8 @@ Example 1: }; Here, a single GPIO controller has GPIOs 0..9 routed to pin controller -pinctrl1's pins 20..29, and GPIOs 10..19 routed to pin controller pinctrl2's -pins 50..59. +pinctrl1's pins 20..29, and GPIOs 10..29 routed to pin controller pinctrl2's +pins 50..69. Example 2: |