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>
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2 changed files with 10 additions and 3 deletions
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@ -12,7 +12,7 @@ include $(INCLUDE_DIR)/version.mk
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include $(INCLUDE_DIR)/feeds.mk
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PKG_NAME:=base-files
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PKG_RELEASE:=183
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PKG_RELEASE:=184
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PKG_FLAGS:=nonshared
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PKG_FILE_DEPENDS:=$(PLATFORM_DIR)/ $(GENERIC_PLATFORM_DIR)/base-files/
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@ -23,8 +23,15 @@ load_gpio_switch()
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# we need to wait a bit until the GPIO appears
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[ -d "$gpio_path" ] || sleep 1
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}
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# set the pin to output with high or low pin value
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{ [ "$value" = "0" ] && echo "low" || echo "high"; } >"$gpio_path/direction"
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# direction attribute only exists if the kernel supports changing the
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# direction of a GPIO
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if [ -e "${gpio_path}/direction" ]; then
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# set the pin to output with high or low pin value
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{ [ "$value" = "0" ] && echo "low" || echo "high"; } >"$gpio_path/direction"
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else
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{ [ "$value" = "0" ] && echo "0" || echo "1"; } >"$gpio_path/value"
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fi
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}
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service_triggers()
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