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authorMathias Kresin <dev@kresin.me>2017-12-21 01:06:42 +0100
committerMathias Kresin <dev@kresin.me>2018-01-09 22:05:46 +0100
commite66c47fb14f56be48366d1206b54724ab6dc2502 (patch)
tree83feb838e8b73d0597e6d48ae1deee6ec9623b5d /package/base-files/files/etc
parentff874b656beb87e3ad0f2cba3f325b1bf51a6b90 (diff)
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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-xpackage/base-files/files/etc/init.d/gpio_switch5
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()