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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 <[email protected]>
CC: Ondrej Zary <[email protected]>
Signed-off-by: Mauro Carvalho Chehab <[email protected]>
This commit is contained in:
Hans de Goede 2012-05-18 09:36:17 -03:00 • committed by Mauro Carvalho Chehab
commit 31a62d4157
2 changed files with 10 additions and 0 deletions
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6
sound/i2c/other/tea575x-tuner.c
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@ -71,6 +71,9 @@ static void snd_tea575x_write(struct snd_tea575x *tea, unsigned int val)
u16 l;
u8 data;
if (tea->ops->write_val)
return tea->ops->write_val(tea, val);
tea->ops->set_direction(tea, 1);
udelay(16);
@ -94,6 +97,9 @@ static u32 snd_tea575x_read(struct snd_tea575x *tea)
u16 l, rdata;
u32 data = 0;
if (tea->ops->read_val)
return tea->ops->read_val(tea);
tea->ops->set_direction(tea, 0);
tea->ops->set_pins(tea, 0);
udelay(16);