add new system file

hc

2024-02-20 102a0743326a03cd1a1202ceda21e175b7d3575c

 kernel/drivers/video/backlight/pwm_bl.c
..
..
@@ -74,7 +74,7 @@
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 	struct pwm_state state;
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 	pwm_get_state(pb->pwm, &state);
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-	if (!pb->enabled)
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+	if (!pb->enabled && !state.enabled)
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 		return;
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 	if (pb->enable_gpio)