V4L/DVB (13086): cx23885: Add skeleton v4l2_subdev for the CX23888 integrated IR controller

This change adds a skeletal implementation of a v4l2_subdevice to provide
encapsulation and abstraction of the CX23888's integrated consumer infrared
controller.  This change also instantiates the cx23888_ir subdev for the
HVR-1850 which has IR hardware physically wired up to a CX23888.

The cx23888_ir subdev code is being written with long-term objectives to:
1. port it to the cx25840 module for the CX2584x, CX2583x, CX23885, & CX231xx
   IR controllers
2. possibly port it to the cx18 module for the CX23418 IR controller
3. have the IR subdevice accessed abstractly in the cx23885 module, so the
   driver can ignore the difference between the CX23885 and CX23888.

Signed-off-by: Andy Walls <awalls@radix.net>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

1 files changed, 8 insertions, 0 deletions

diff --git a/drivers/media/video/cx23885/cx23885.h b/drivers/media/video/cx23885/cx23885.h
index f4c4108f23f3..f7ed146566d9 100644
--- a/drivers/media/video/cx23885/cx23885.h
+++ b/drivers/media/video/cx23885/cx23885.h
@@ -355,6 +355,7 @@ struct cx23885_dev {
         unsigned char              radio_addr;
         unsigned int               has_radio;
         struct v4l2_subdev         *sd_cx25840;
+        struct v4l2_subdev         *sd_ir;
 
         /* V4l */
         u32                        freq;
@@ -383,6 +384,13 @@ static inline struct cx23885_dev *to_cx23885(struct v4l2_device *v4l2_dev)
 #define call_all(dev, o, f, args...) \
         v4l2_device_call_all(&dev->v4l2_dev, 0, o, f, ##args)
 
+#define CX23885_HW_888_IR (1 << 0)
+
+#define call_hw(dev, grpid, o, f, args...) \
+        v4l2_device_call_all(&dev->v4l2_dev, grpid, o, f, ##args)
+
+extern struct v4l2_subdev *cx23885_find_hw(struct cx23885_dev *dev, u32 hw);
+
 extern struct list_head cx23885_devlist;
 
 #define SRAM_CH01  0 /* Video A */