Once the host has set the initial setting of the LEDs after a new USB keyboard gets connected, they appear to have a SET_IDLE command sent which turns of the LEDs. This means that the initial step of setting the LEDs on a keyboard is just reset once .probe() finishes. To be sure we set the LEDs, start a delayed task to try to resend them after 1 sec.
Signed-off-by: Benjamin Tissoires <[email protected]> --- drivers/input/input-leds.c | 33 +++++++++++++++++++++++++++++++++ 1 file changed, 33 insertions(+) diff --git a/drivers/input/input-leds.c b/drivers/input/input-leds.c index 766bf26..83d930f 100644 --- a/drivers/input/input-leds.c +++ b/drivers/input/input-leds.c @@ -46,6 +46,7 @@ struct input_led { struct input_leds { struct input_handle handle; + struct delayed_work init_work; unsigned int num_leds; struct input_led leds[]; }; @@ -83,6 +84,33 @@ static int input_leds_get_count(struct input_dev *dev) return count; } +#ifdef CONFIG_LEDS_TRIGGERS +static void leds_init_work(struct work_struct *work) +{ + struct input_leds *leds = container_of(work, struct input_leds, + init_work.work); + struct input_led *led; + unsigned int led_code; + int led_no = 0; + + for_each_set_bit(led_code, leds->handle.dev->ledbit, LED_CNT) { + led = &leds->leds[led_no]; + + down_read(&led->cdev.trigger_lock); + if (led->cdev.trigger && led->cdev.trigger->activate) { + led_set_brightness(&led->cdev, LED_OFF); + led->cdev.trigger->activate(&led->cdev); + } + up_read(&led->cdev.trigger_lock); + led_no++; + } +} +#else /* !CONFIG_LEDS_TRIGGERS */ +static void leds_init_work(struct work_struct *work) +{ +} +#endif + static int input_leds_connect(struct input_handler *handler, struct input_dev *dev, const struct input_device_id *id) @@ -108,6 +136,7 @@ static int input_leds_connect(struct input_handler *handler, leds->handle.handler = handler; leds->handle.name = "leds"; leds->handle.private = leds; + INIT_DELAYED_WORK(&leds->init_work, leds_init_work); error = input_register_handle(&leds->handle); if (error) @@ -151,6 +180,8 @@ static int input_leds_connect(struct input_handler *handler, led_no++; } + schedule_delayed_work(&leds->init_work, msecs_to_jiffies(1000)); + return 0; err_unregister_leds: @@ -176,6 +207,8 @@ static void input_leds_disconnect(struct input_handle *handle) struct input_leds *leds = handle->private; int i; + cancel_delayed_work_sync(&leds->init_work); + for (i = 0; i < leds->num_leds; i++) { struct input_led *led = &leds->leds[i]; -- 2.9.3
