[media] drxk: Improves the UIO handling

The driver is too limited: it assumes that UIO is used only for
controlling the antenna, and that only UIO-1 is in usage. However,
from Terratec H7 driver [1], 3 UIO's can be used. In fact, it seems
that H7 needs to use all 3. So, make the code generic enough to handle
the most complex scenario. For now, only antena GPIO can be specified,
but is is easier now to add the other GPIO/UIO needs.

Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

1 files changed, 8 insertions, 5 deletions

diff --git a/drivers/media/dvb/frontends/drxk.h b/drivers/media/dvb/frontends/drxk.h
index 67589b607c4e..a756e4562fe2 100644
--- a/drivers/media/dvb/frontends/drxk.h
+++ b/drivers/media/dvb/frontends/drxk.h
@@ -10,18 +10,21 @@
  * adr:                 I2C Address of the DRX-K
  * single_master:       Device is on the single master mode
  * no_i2c_bridge:       Don't switch the I2C bridge to talk with tuner
- * antenna_uses_gpio:   Use GPIO to control the antenna
- * antenna_dvbc:        GPIO for changing antenna to DVB-C
- * antenna_dvbt:        GPIO for changing antenna to DVB-T
+ * antenna_gpio:        GPIO bit used to control the antenna
+ * antenna_dvbt:        GPIO bit for changing antenna to DVB-C. A value of 1
+ *                      means that 1=DVBC, 0 = DVBT. Zero means the opposite.
  * microcode_name:      Name of the firmware file with the microcode
+ *
+ * On the *_gpio vars, bit 0 is UIO-1, bit 1 is UIO-2 and bit 2 is
+ * UIO-3.
  */
 struct drxk_config {
         u8      adr;
         bool    single_master;
         bool    no_i2c_bridge;
 
-        bool    antenna_uses_gpio;
-        u16     antenna_dvbc, antenna_dvbt;
+        bool    antenna_dvbt;
+        u16     antenna_gpio;
 
         const char *microcode_name;
 };