AcoSail/kernel_optimize_test
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V4L/DVB (7008): s5h1409: Ensure the silicon is initialized during attach

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If not it impacts on analog tuner quality.

Signed-off-by: Steven Toth <stoth@hauppauge.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
This commit is contained in:
Steven Toth 2008-01-10 03:43:11 -03:00 committed by Mauro Carvalho Chehab
parent 7b8880140f
commit a57ed8a1f7
1 changed files with 10 additions and 2 deletions
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12
drivers/media/dvb/frontends/s5h1409.c
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@ -750,6 +750,7 @@ struct dvb_frontend* s5h1409_attach(const struct s5h1409_config* config,
struct i2c_adapter* i2c)
{
struct s5h1409_state* state = NULL;
u16 reg;
/* allocate memory for the internal state */
state = kmalloc(sizeof(struct s5h1409_state), GFP_KERNEL);
@ -763,7 +764,8 @@ struct dvb_frontend* s5h1409_attach(const struct s5h1409_config* config,
state->if_freq = S5H1409_VSB_IF_FREQ;
/* check if the demod exists */
if (s5h1409_readreg(state, 0x04) != 0x0066)
reg = s5h1409_readreg(state, 0x04);
if ((reg != 0x0066) && (reg != 0x007f))
goto error;
/* create dvb_frontend */
@ -771,8 +773,14 @@ struct dvb_frontend* s5h1409_attach(const struct s5h1409_config* config,
sizeof(struct dvb_frontend_ops));
state->frontend.demodulator_priv = state;
if (s5h1409_init(&state->frontend) != 0) {
printk(KERN_ERR "%s: Failed to initialize correctly\n",
__FUNCTION__);
goto error;
}
/* Note: Leaving the I2C gate open here. */
s5h1409_writereg(state, 0xf3, 1);
s5h1409_i2c_gate_ctrl(&state->frontend, 1);
return &state->frontend;