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usb_kbd: use async polling instead of regular polling 

This fixes the overpolling of USB keyboard which
causes slowdown of entier barebox by using periodic
polling occuting once per some milliseconds.

Signed-off-by: Aleksey Kuleshov <rndfax@yandex.ru>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
This commit is contained in:
Aleksey Kuleshov 2016-03-09 13:17:51 +03:00 committed by Sascha Hauer
parent 9505b28a68
commit b73e1479d6
1 changed files with 13 additions and 7 deletions
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20
drivers/input/usb_kbd.c
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@ -48,7 +48,7 @@ struct usb_kbd_pdata;
struct usb_kbd_pdata {
uint8_t *new;
uint8_t old[USB_KBD_BOOT_REPORT_SIZE];
struct poller_struct poller;
struct poller_async poller;
struct usb_device *usbdev;
int lock;
unsigned long intpipe;
@ -92,10 +92,9 @@ static const unsigned char usb_kbd_keycode[256] = {
150,158,159,128,136,177,178,176,142,152,173,140
};
static void usb_kbd_poll(struct poller_struct *poller)
static void usb_kbd_poll(void *arg)
{
struct usb_kbd_pdata *data = container_of(poller,
struct usb_kbd_pdata, poller);
struct usb_kbd_pdata *data = arg;
struct usb_device *usbdev = data->usbdev;
int ret, i;
@ -146,6 +145,7 @@ static void usb_kbd_poll(struct poller_struct *poller)
exit:
data->lock = 0;
poller_call_async(&data->poller, data->intinterval * MSECOND, usb_kbd_poll, data);
}
static int usb_kbd_probe(struct usb_device *usbdev,
@ -201,16 +201,22 @@ static int usb_kbd_probe(struct usb_device *usbdev,
return ret;
}
data->poller.func = usb_kbd_poll;
ret = poller_async_register(&data->poller);
if (ret) {
dev_err(&usbdev->dev, "can't setup poller\n");
return ret;
}
return poller_register(&data->poller);
poller_call_async(&data->poller, data->intinterval * MSECOND, usb_kbd_poll, data);
return 0;
}
static void usb_kbd_disconnect(struct usb_device *usbdev)
{
struct usb_kbd_pdata *data = usbdev->drv_data;
poller_unregister(&data->poller);
poller_async_unregister(&data->poller);
input_device_unregister(&data->input);
dma_free(data->new);
free(data);