V4L/DVB (5313): Added a config entry and a gpio function pointer to tuner struct

These entries mainly are to support configurations of the tda827x
silicon tuner with a preamplifier.
The values can be set throgh the attach inform or through
the extended TUNER_SET_TYPE_ADDR client call. The function pointer
will only be updated if the parameter is not NULL.
Since a typecast is necessary to set the pointer, i added a typedef for
this pointer (tuner_gpio_func_t) in tuner.h

Signed-off-by: Hartmut Hackmann <hartmut.hackmann@t-online.de>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>

1 files changed, 7 insertions, 0 deletions

diff --git a/include/media/tuner.h b/include/media/tuner.h
index 99acf847365c..fe567129b22b 100644
--- a/include/media/tuner.h
+++ b/include/media/tuner.h
@@ -173,10 +173,15 @@ enum tuner_mode {
    when the tuner is set to TV mode.
  */
 
+/* allows to access the GPIOs of the host (pci bridge) */
+typedef void (*tuner_gpio_func_t) (void *dev, int bit_no,int value);
+
 struct tuner_setup {
         unsigned short  addr;   /* I2C address */
         unsigned int    type;   /* Tuner type */
         unsigned int    mode_mask;  /* Allowed tuner modes */
+        unsigned int    config; /* configuraion for more complex tuners */
+        tuner_gpio_func_t gpio_func;
 };
 
 struct tuner {
@@ -210,6 +215,8 @@ struct tuner {
         unsigned char tda827x_addr;
         unsigned char tda827x_ver;
         unsigned int sgIF;
+        unsigned int config;
+        tuner_gpio_func_t gpio_func;
 
         /* function ptrs */
         void (*set_tv_freq)(struct i2c_client *c, unsigned int freq);