[PATCH] tuner-core.c improvments and Ymec Tvision TVF8533MF support

tuner-core.c, tuner.h:

- tuner-core changed to support multiple I2C devices used on some
  adapters;

- Kconfig now has an option (CONFIG_TUNER_MULTI_I2C) to enable this new
  behavor;

- By default, even enabling CONFIG_TUNER_MULTI_I2C, tuner-core emulates
  the old behavor, using first I2C device for both FM and TV;

- There is a new i2c command (TUNER_SET_ADDR) to allow tuner clients to
  select I2C address for FM or TV tuner;

- Tuner I2C dettach now generates a warning on syslog if failed.

tuner-simple.c:

- TVision TVF-8531MF and TVF-5533 MF tuner included.  It uses, by
  default, I2C on 0xC2 address for TV and on 0xC0 for Radio.  Both TV and
  FM Radio mode are working.

Signed-off-by: Mauro Carvalho Chehab <mchehab@brturbo.com.br>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

1 files changed, 13 insertions, 0 deletions

diff --git a/drivers/media/video/Kconfig b/drivers/media/video/Kconfig
index 6c05fddb69a..8c349706f85 100644
--- a/drivers/media/video/Kconfig
+++ b/drivers/media/video/Kconfig
@@ -7,6 +7,19 @@ menu "Video For Linux"
 
 comment "Video Adapters"
 
+config CONFIG_TUNER_MULTI_I2C
+	bool "Enable support for multiple I2C devices on Video Adapters (EXPERIMENTAL)"
+	depends on VIDEO_DEV && EXPERIMENTAL
+	---help---
+	  Some video adapters have more than one tuner inside. This patch
+	  enables support for using more than one tuner. This is required
+	  for some cards to allow tunning  both video and radio.
+	  It also improves I2C autodetection for these cards.
+
+	  Only few tuners currently is supporting this. More to come.
+
+	  It is safe to say 'Y' here even if your card has only one I2C tuner.
+
 config VIDEO_BT848
 	tristate "BT848 Video For Linux"
 	depends on VIDEO_DEV && PCI && I2C