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authorMathias Kresin <dev@kresin.me>2018-01-15 01:23:36 +0100
committerMathias Kresin <dev@kresin.me>2018-01-18 07:22:37 +0100
commitacafbac4b33a5273e6125cf2fcdf118f70cd23ec (patch)
treecd45a0547b83d3901cfe317025c3e31fb8dbcfa3 /package/base-files/files/etc
parentf476c9a7458f9a1da876df02cce065f9cdeedd87 (diff)
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base-files: gpio switch: check if direction can be set
Obviously not all GPIO controller allow to change the direction. The issue is around since the beginning of the script but only due to the recent changes error messages are more visible. Add a check if a change of the direction is supported by the GPIO controller and fallback to setting only the value if not. Fixes: FS#1271 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_switch11
1 files changed, 9 insertions, 2 deletions
diff --git a/package/base-files/files/etc/init.d/gpio_switch b/package/base-files/files/etc/init.d/gpio_switch
index 32c142f110..6b2dcdce41 100755
--- a/package/base-files/files/etc/init.d/gpio_switch
+++ b/package/base-files/files/etc/init.d/gpio_switch
@@ -23,8 +23,15 @@ load_gpio_switch()
# we need to wait a bit until the GPIO appears
[ -d "$gpio_path" ] || sleep 1
}
- # set the pin to output with high or low pin value
- { [ "$value" = "0" ] && echo "low" || echo "high"; } >"$gpio_path/direction"
+
+ # direction attribute only exists if the kernel supports changing the
+ # direction of a GPIO
+ if [ -e "${gpio_path}/direction" ]; then
+ # set the pin to output with high or low pin value
+ { [ "$value" = "0" ] && echo "low" || echo "high"; } >"$gpio_path/direction"
+ else
+ { [ "$value" = "0" ] && echo "0" || echo "1"; } >"$gpio_path/value"
+ fi
}
service_triggers()