[media] snd_tea575x: Add support for tuning AM

Add support for tuning AM (on devices with the necessary additional
hardware components), and advertise the available bands using the new
VIDIOC_ENUM_FREQ_BANDS ioctl.

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
CC: Ondrej Zary <linux@rainbow-software.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

1 files changed, 3 insertions, 0 deletions

diff --git a/include/sound/tea575x-tuner.h b/include/sound/tea575x-tuner.h
index fe8590cac5c2..2a6953568554 100644
--- a/include/sound/tea575x-tuner.h
+++ b/include/sound/tea575x-tuner.h
@@ -28,6 +28,7 @@
 #include <media/v4l2-device.h>
 
 #define TEA575X_FMIF    10700
+#define TEA575X_AMIF      450
 
 #define TEA575X_DATA    (1 << 0)
 #define TEA575X_CLK     (1 << 1)
@@ -52,12 +53,14 @@ struct snd_tea575x {
         struct video_device vd;         /* video device */
         int radio_nr;                   /* radio_nr */
         bool tea5759;                   /* 5759 chip is present */
+        bool has_am;                    /* Device can tune to AM freqs */
         bool cannot_read_data;          /* Device cannot read the data pin */
         bool cannot_mute;               /* Device cannot mute */
         bool mute;                      /* Device is muted? */
         bool stereo;                    /* receiving stereo */
         bool tuned;                     /* tuned to a station */
         unsigned int val;               /* hw value */
+        u32 band;                       /* 0: FM, 1: FM-Japan, 2: AM */
         u32 freq;                       /* frequency */
         struct mutex mutex;
         struct snd_tea575x_ops *ops;