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Commit 31a62d41 authored by Hans de Goede's avatar Hans de Goede Committed by Mauro Carvalho Chehab
Browse files

[media] snd_tea575x: Add write_/read_val operations 



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: default avatarHans de Goede <hdegoede@redhat.com>
CC: Ondrej Zary <linux@rainbow-software.org>
Signed-off-by: default avatarMauro Carvalho Chehab <mchehab@redhat.com>
parent 9bc31633

include/sound/tea575x-tuner.h

+4 −0
Original line number Diff line number Diff line
@@ -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);

sound/i2c/other/tea575x-tuner.c

+6 −0
Original line number Diff line number Diff line
@@ -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);