diff options
Diffstat (limited to 'drivers/leds/trigger/ledtrig-oneshot.c')
| -rw-r--r-- | drivers/leds/trigger/ledtrig-oneshot.c | 43 |
1 files changed, 37 insertions, 6 deletions
diff --git a/drivers/leds/trigger/ledtrig-oneshot.c b/drivers/leds/trigger/ledtrig-oneshot.c index 95c9be4b6e7e..bee3bd452abf 100644 --- a/drivers/leds/trigger/ledtrig-oneshot.c +++ b/drivers/leds/trigger/ledtrig-oneshot.c @@ -1,13 +1,10 @@ +// SPDX-License-Identifier: GPL-2.0-only /* * One-shot LED Trigger * * Copyright 2012, Fabio Baltieri <fabio.baltieri@gmail.com> * * Based on ledtrig-timer.c by Richard Purdie <rpurdie@openedhand.com> - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License version 2 as - * published by the Free Software Foundation. */ #include <linux/module.h> @@ -130,6 +127,34 @@ static struct attribute *oneshot_trig_attrs[] = { }; ATTRIBUTE_GROUPS(oneshot_trig); +static void pattern_init(struct led_classdev *led_cdev) +{ + u32 *pattern; + unsigned int size = 0; + + pattern = led_get_default_pattern(led_cdev, &size); + if (!pattern) + goto out_default; + + if (size != 2) { + dev_warn(led_cdev->dev, + "Expected 2 but got %u values for delays pattern\n", + size); + goto out_default; + } + + led_cdev->blink_delay_on = pattern[0]; + led_cdev->blink_delay_off = pattern[1]; + kfree(pattern); + + return; + +out_default: + kfree(pattern); + led_cdev->blink_delay_on = DEFAULT_DELAY; + led_cdev->blink_delay_off = DEFAULT_DELAY; +} + static int oneshot_trig_activate(struct led_classdev *led_cdev) { struct oneshot_trig_data *oneshot_data; @@ -140,8 +165,14 @@ static int oneshot_trig_activate(struct led_classdev *led_cdev) led_set_trigger_data(led_cdev, oneshot_data); - led_cdev->blink_delay_on = DEFAULT_DELAY; - led_cdev->blink_delay_off = DEFAULT_DELAY; + if (led_cdev->flags & LED_INIT_DEFAULT_TRIGGER) { + pattern_init(led_cdev); + /* + * Mark as initialized even on pattern_init() error because + * any consecutive call to it would produce the same error. + */ + led_cdev->flags &= ~LED_INIT_DEFAULT_TRIGGER; + } return 0; } |