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| author | Mathias Kresin <dev@kresin.me> | 2017-12-21 01:06:42 +0100 |
|---|---|---|
| committer | Mathias Kresin <dev@kresin.me> | 2018-01-09 22:05:46 +0100 |
| commit | e66c47fb14f56be48366d1206b54724ab6dc2502 (patch) | |
| tree | 83feb838e8b73d0597e6d48ae1deee6ec9623b5d /package/base-files/files/etc | |
| parent | ff874b656beb87e3ad0f2cba3f325b1bf51a6b90 (diff) | |
| download | mtk-20170518-e66c47fb14f56be48366d1206b54724ab6dc2502.zip mtk-20170518-e66c47fb14f56be48366d1206b54724ab6dc2502.tar.gz mtk-20170518-e66c47fb14f56be48366d1206b54724ab6dc2502.tar.bz2 | |
base-files: gpio switch: set output value with direction
Use the "low" and "high" values to configure the GPIO as an output with
that initial value. It ensures that the gpio doesn't have a unwanted value
during the time the direction is set to ouput and the actual value is
applied.
We don't need to take care of the GPIO polarity for now, since our
exported GPIOs are always active low.
Signed-off-by: Mathias Kresin <dev@kresin.me>
Diffstat (limited to 'package/base-files/files/etc')
| -rwxr-xr-x | package/base-files/files/etc/init.d/gpio_switch | 5 |
1 files changed, 2 insertions, 3 deletions
diff --git a/package/base-files/files/etc/init.d/gpio_switch b/package/base-files/files/etc/init.d/gpio_switch index 5a62be9..b67950a 100755 --- a/package/base-files/files/etc/init.d/gpio_switch +++ b/package/base-files/files/etc/init.d/gpio_switch @@ -22,10 +22,9 @@ load_gpio_switch() echo "$gpio_pin" >/sys/class/gpio/export # we need to wait a bit until the GPIO appears [ -d "$gpio_path" ] || sleep 1 - echo out >"$gpio_path/direction" } - # write 0 or 1 to the "value" field - { [ "$value" = "0" ] && echo "0" || echo "1"; } >"$gpio_path/value" + # set the pin to output with high or low pin value + { [ "$value" = "0" ] && echo "high" || echo "low"; } >"$gpio_path/direction" } service_triggers() |