[media] radio-shark: Add support for suspend & resume

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

3 files changed, 45 insertions, 2 deletions

diff --git a/drivers/media/radio/radio-shark.c b/drivers/media/radio/radio-shark.c
index e1970bf031a4..248bc3a30832 100644
--- a/drivers/media/radio/radio-shark.c
+++ b/drivers/media/radio/radio-shark.c
@@ -59,7 +59,8 @@ MODULE_LICENSE("GPL");
 
 #define v4l2_dev_to_shark(d) container_of(d, struct shark_device, v4l2_dev)
 
-enum { BLUE_LED, BLUE_PULSE_LED, RED_LED, NO_LEDS };
+/* Note BLUE_IS_PULSE comes after NO_LEDS as it is a status bit, not a LED */
+enum { BLUE_LED, BLUE_PULSE_LED, RED_LED, NO_LEDS, BLUE_IS_PULSE };
 
 struct shark_device {
         struct usb_device *usbdev;
@@ -190,6 +191,7 @@ static void shark_led_set_blue(struct led_classdev *led_cdev,
 
         atomic_set(&shark->brightness[BLUE_LED], value);
         set_bit(BLUE_LED, &shark->brightness_new);
+        clear_bit(BLUE_IS_PULSE, &shark->brightness_new);
         schedule_work(&shark->led_work);
 }
 
@@ -201,6 +203,7 @@ static void shark_led_set_blue_pulse(struct led_classdev *led_cdev,
 
         atomic_set(&shark->brightness[BLUE_PULSE_LED], 256 - value);
         set_bit(BLUE_PULSE_LED, &shark->brightness_new);
+        set_bit(BLUE_IS_PULSE, &shark->brightness_new);
         schedule_work(&shark->led_work);
 }
 
@@ -240,6 +243,7 @@ static int shark_register_leds(struct shark_device *shark, struct device *dev)
 {
         int i, retval;
 
+        atomic_set(&shark->brightness[BLUE_LED], 127);
         INIT_WORK(&shark->led_work, shark_led_work);
         for (i = 0; i < NO_LEDS; i++) {
                 shark->leds[i] = shark_led_templates[i];
@@ -266,6 +270,16 @@ static void shark_unregister_leds(struct shark_device *shark)
 
         cancel_work_sync(&shark->led_work);
 }
+
+static void shark_resume_leds(struct shark_device *shark)
+{
+        if (test_bit(BLUE_IS_PULSE, &shark->brightness_new))
+                set_bit(BLUE_PULSE_LED, &shark->brightness_new);
+        else
+                set_bit(BLUE_LED, &shark->brightness_new);
+        set_bit(RED_LED, &shark->brightness_new);
+        schedule_work(&shark->led_work);
+}
 #else
 static int shark_register_leds(struct shark_device *shark, struct device *dev)
 {
@@ -274,6 +288,7 @@ static int shark_register_leds(struct shark_device *shark, struct device *dev)
         return 0;
 }
 static inline void shark_unregister_leds(struct shark_device *shark) { }
+static inline void shark_resume_leds(struct shark_device *shark) { }
 #endif
 
 static void usb_shark_disconnect(struct usb_interface *intf)
@@ -359,6 +374,27 @@ err_alloc_buffer:
         return retval;
 }
 
+#ifdef CONFIG_PM
+int usb_shark_suspend(struct usb_interface *intf, pm_message_t message)
+{
+        return 0;
+}
+
+int usb_shark_resume(struct usb_interface *intf)
+{
+        struct v4l2_device *v4l2_dev = usb_get_intfdata(intf);
+        struct shark_device *shark = v4l2_dev_to_shark(v4l2_dev);
+
+        mutex_lock(&shark->tea.mutex);
+        snd_tea575x_set_freq(&shark->tea);
+        mutex_unlock(&shark->tea.mutex);
+
+        shark_resume_leds(shark);
+
+        return 0;
+}
+#endif
+
 /* Specify the bcdDevice value, as the radioSHARK and radioSHARK2 share ids */
 static struct usb_device_id usb_shark_device_table[] = {
         { .match_flags = USB_DEVICE_ID_MATCH_DEVICE_AND_VERSION |
@@ -378,5 +414,10 @@ static struct usb_driver usb_shark_driver = {
         .probe                  = usb_shark_probe,
         .disconnect             = usb_shark_disconnect,
         .id_table               = usb_shark_device_table,
+#ifdef CONFIG_PM
+        .suspend                = usb_shark_suspend,
+        .resume                 = usb_shark_resume,
+        .reset_resume           = usb_shark_resume,
+#endif
 };
 module_usb_driver(usb_shark_driver);
diff --git a/include/sound/tea575x-tuner.h b/include/sound/tea575x-tuner.h
index 2a6953568554..098c4de44945 100644
--- a/include/sound/tea575x-tuner.h
+++ b/include/sound/tea575x-tuner.h
@@ -73,5 +73,6 @@ struct snd_tea575x {
 
 int snd_tea575x_init(struct snd_tea575x *tea, struct module *owner);
 void snd_tea575x_exit(struct snd_tea575x *tea);
+void snd_tea575x_set_freq(struct snd_tea575x *tea);
 
 #endif /* __SOUND_TEA575X_TUNER_H */
diff --git a/sound/i2c/other/tea575x-tuner.c b/sound/i2c/other/tea575x-tuner.c
index 88bbd88c066e..cd79ed590f9a 100644
--- a/sound/i2c/other/tea575x-tuner.c
+++ b/sound/i2c/other/tea575x-tuner.c
@@ -191,7 +191,7 @@ static u32 snd_tea575x_get_freq(struct snd_tea575x *tea)
         return snd_tea575x_val_to_freq(tea, snd_tea575x_read(tea));
 }
 
-static void snd_tea575x_set_freq(struct snd_tea575x *tea)
+void snd_tea575x_set_freq(struct snd_tea575x *tea)
 {
         u32 freq = tea->freq / 16;      /* to kHz */
         u32 band = 0;
@@ -571,3 +571,4 @@ module_exit(alsa_tea575x_module_exit)
 
 EXPORT_SYMBOL(snd_tea575x_init);
 EXPORT_SYMBOL(snd_tea575x_exit);
+EXPORT_SYMBOL(snd_tea575x_set_freq);