From 31a62d415726d94bae5caf5f2e50232aa06babf6 Mon Sep 17 00:00:00 2001 From: Hans de Goede Date: Fri, 18 May 2012 09:36:17 -0300 Subject: [PATCH] [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: Hans de Goede CC: Ondrej Zary Signed-off-by: Mauro Carvalho Chehab --- include/sound/tea575x-tuner.h | 4 ++++ sound/i2c/other/tea575x-tuner.c | 6 ++++++ 2 files changed, 10 insertions(+) diff --git a/include/sound/tea575x-tuner.h b/include/sound/tea575x-tuner.h index 0c3c2fb..7bd6f61 100644 --- a/include/sound/tea575x-tuner.h +++ b/include/sound/tea575x-tuner.h @@ -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); diff --git a/sound/i2c/other/tea575x-tuner.c b/sound/i2c/other/tea575x-tuner.c index b29b88f..080aae9 100644 --- a/sound/i2c/other/tea575x-tuner.c +++ b/sound/i2c/other/tea575x-tuner.c @@ -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); -- 2.7.4