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[media] snd_tea575x: Add write_/read_val operations

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Some devices which use the tea575x tuner chip don't allow bit banging the
lines, instead they offer a method to directly set / get the contents of the
25 bit shift-register in the chip. Notably the Griffin radioSHARK USB radio
receiver does this.

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>
This commit is contained in:
Hans de Goede 2012-05-18 09:36:17 -03:00 • committed by Mauro Carvalho Chehab
parent 9bc31633c2
commit 31a62d4157
2 changed files with 10 additions and 0 deletions
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4
include/sound/tea575x-tuner.h
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@ -37,6 +37,10 @@
struct snd_tea575x;
struct snd_tea575x_ops {
/* Drivers using snd_tea575x must either define read_ and write_val */
void (*write_val)(struct snd_tea575x *tea, u32 val);
u32 (*read_val)(struct snd_tea575x *tea);
/* Or define the 3 pin functions */
void (*set_pins)(struct snd_tea575x *tea, u8 pins);
u8 (*get_pins)(struct snd_tea575x *tea);
void (*set_direction)(struct snd_tea575x *tea, bool output);