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Commit 083a1731 authored by Devin Heitmueller's avatar Devin Heitmueller Committed by Mauro Carvalho Chehab
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V4L/DVB (11062): au8522: fix register read/write high bits 



For the i2c messages to read and write registers, the two high order bits
of the first byte dictates whether it is a read or a write operation.

Thanks to Michael Krufky <mkrufky@linuxtv.org> and Steven Toth
<stoth@linuxtv.org> for providing sample hardware, engineering level support,
and testing.

Signed-off-by: default avatarDevin Heitmueller <dheitmueller@linuxtv.org>
Signed-off-by: default avatarMichael Krufky <mkrufky@linuxtv.org>
Signed-off-by: default avatarMauro Carvalho Chehab <mchehab@redhat.com>
parent 0c44bf36

drivers/media/dvb/frontends/au8522_dig.c

+2 −2
Original line number Diff line number Diff line
@@ -40,7 +40,7 @@ static int debug; 
int au8522_writereg(struct au8522_state *state, u16 reg, u8 data)

{

	int ret;

	u8 buf [] = { reg >> 8, reg & 0xff, data };

	u8 buf [] = { (reg >> 8) | 0x80, reg & 0xff, data };



	struct i2c_msg msg = { .addr = state->config->demod_address,

			       .flags = 0, .buf = buf, .len = 3 };
@@ -57,7 +57,7 @@ int au8522_writereg(struct au8522_state *state, u16 reg, u8 data) 
u8 au8522_readreg(struct au8522_state *state, u16 reg)

{

	int ret;

	u8 b0 [] = { reg >> 8, reg & 0xff };

	u8 b0 [] = { (reg >> 8) | 0x40, reg & 0xff };

	u8 b1 [] = { 0 };



	struct i2c_msg msg [] = {