diff options
| author | Frank Schaefer <fschaefer.oss@googlemail.com> | 2013-12-02 01:06:56 +0400 |
|---|---|---|
| committer | Mauro Carvalho Chehab <m.chehab@samsung.com> | 2013-12-10 22:20:26 +0400 |
| commit | 6063d07785b7059d276cb1a39c76186804f5938e (patch) | |
| tree | 1ecd1c42394623e710ffda7d2d239363eb16edc7 /drivers/media/usb/em28xx/em28xx-input.c | |
| parent | 6b8a3170c9984be58e50e23c78e2eb7833f33c4c (diff) | |
| download | linux-6063d07785b7059d276cb1a39c76186804f5938e.tar.xz | |
[media] em28xx: add support for illumination button and LED
The SpeedLink VAD Laplace webcam is equipped with an illumination button and
an illumination LED. When the button is pressed, the driver must toggle the
LED state via the corresponding GPO port.
Signed-off-by: Frank Schäfer <fschaefer.oss@googlemail.com>
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>
Diffstat (limited to 'drivers/media/usb/em28xx/em28xx-input.c')
| -rw-r--r-- | drivers/media/usb/em28xx/em28xx-input.c | 19 |
1 files changed, 18 insertions, 1 deletions
diff --git a/drivers/media/usb/em28xx/em28xx-input.c b/drivers/media/usb/em28xx/em28xx-input.c index ebc538730e07..e0acc92f0dfd 100644 --- a/drivers/media/usb/em28xx/em28xx-input.c +++ b/drivers/media/usb/em28xx/em28xx-input.c @@ -480,6 +480,7 @@ static void em28xx_query_buttons(struct work_struct *work) u8 i, j; int regval; bool is_pressed, was_pressed; + const struct em28xx_led *led; /* Poll and evaluate all addresses */ for (i = 0; i < dev->num_button_polling_addresses; i++) { @@ -524,6 +525,15 @@ static void em28xx_query_buttons(struct work_struct *work) input_report_key(dev->sbutton_input_dev, EM28XX_SNAPSHOT_KEY, 0); break; + case EM28XX_BUTTON_ILLUMINATION: + led = em28xx_find_led(dev, + EM28XX_LED_ILLUMINATION); + /* Switch illumination LED on/off */ + if (led) + em28xx_toggle_reg_bits(dev, + led->gpio_reg, + led->gpio_mask); + break; default: WARN_ONCE(1, "BUG: unhandled button role."); } @@ -600,10 +610,17 @@ static void em28xx_init_buttons(struct em28xx *dev) WARN_ONCE(1, "BUG: maximum number of button polling addresses exceeded."); addr_new = 0; } - /* Register input device (if needed) */ + /* Button role specific checks and actions */ if (button->role == EM28XX_BUTTON_SNAPSHOT) { + /* Register input device */ if (em28xx_register_snapshot_button(dev) < 0) addr_new = 0; + } else if (button->role == EM28XX_BUTTON_ILLUMINATION) { + /* Check sanity */ + if (!em28xx_find_led(dev, EM28XX_LED_ILLUMINATION)) { + em28xx_errdev("BUG: illumination button defined, but no illumination LED.\n"); + addr_new = 0; + } } /* Add read address to list of polling addresses */ if (addr_new) { |