V4L/DVB (8332): cx18: Suport external reset of the Z8F0811 IR controller on HVR-1600 for lirc

cx18: added in cx18_ir_reset_gpio function for lirc_pvr150 like module.  Also
added the ability to reset the IR chip via ioctl like ivtv.  This needs the
mutex to protect gpio_dir and gpio_val in struct cx18 as gpio changes can
come from a few different asynchronous sources now.

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

1 files changed, 9 insertions, 0 deletions

diff --git a/drivers/media/video/cx18/cx18-ioctl.c b/drivers/media/video/cx18/cx18-ioctl.c
index 146a4b856496..0d74e59e503e 100644
--- a/drivers/media/video/cx18/cx18-ioctl.c
+++ b/drivers/media/video/cx18/cx18-ioctl.c
@@ -754,6 +754,15 @@ static int cx18_default(struct file *file, void *fh, int cmd, void *arg)
                 cx18_audio_set_route(cx, route);
                 break;
         }
+
+        case VIDIOC_INT_RESET: {
+                u32 val = *(u32 *)arg;
+
+                if ((val == 0) || (val & 0x01))
+                        cx18_reset_ir_gpio(&cx->i2c_algo_cb_data[0]);
+                break;
+        }
+
         default:
                 return -EINVAL;
         }