V4L/DVB (5467): Add suspend/resume support to the Cafe CCIC
Add suspend/resume support to the Cafe CCIC driver.
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
diff --git a/drivers/media/video/cafe_ccic.c b/drivers/media/video/cafe_ccic.c
index bfae5d2..4aa360b 100644
--- a/drivers/media/video/cafe_ccic.c
+++ b/drivers/media/video/cafe_ccic.c
@@ -37,7 +37,7 @@
#include "cafe_ccic-regs.h"
-#define CAFE_VERSION 0x000001
+#define CAFE_VERSION 0x000002
/*
@@ -2188,6 +2188,45 @@
}
+#ifdef CONFIG_PM
+/*
+ * Basic power management.
+ */
+static int cafe_pci_suspend(struct pci_dev *pdev, pm_message_t state)
+{
+ struct cafe_camera *cam = cafe_find_by_pdev(pdev);
+ int ret;
+
+ ret = pci_save_state(pdev);
+ if (ret)
+ return ret;
+ cafe_ctlr_stop_dma(cam);
+ cafe_ctlr_power_down(cam);
+ pci_disable_device(pdev);
+ return 0;
+}
+
+
+static int cafe_pci_resume(struct pci_dev *pdev)
+{
+ struct cafe_camera *cam = cafe_find_by_pdev(pdev);
+ int ret = 0;
+
+ ret = pci_restore_state(pdev);
+ if (ret)
+ return ret;
+ pci_enable_device(pdev);
+ cafe_ctlr_init(cam);
+ cafe_ctlr_power_up(cam);
+ set_bit(CF_CONFIG_NEEDED, &cam->flags);
+ if (cam->state == S_SPECREAD)
+ cam->state = S_IDLE; /* Don't bother restarting */
+ else if (cam->state == S_SINGLEREAD || cam->state == S_STREAMING)
+ ret = cafe_read_setup(cam, cam->state);
+ return ret;
+}
+
+#endif /* CONFIG_PM */
static struct pci_device_id cafe_ids[] = {
@@ -2203,6 +2242,10 @@
.id_table = cafe_ids,
.probe = cafe_pci_probe,
.remove = cafe_pci_remove,
+#ifdef CONFIG_PM
+ .suspend = cafe_pci_suspend,
+ .resume = cafe_pci_resume,
+#endif
};