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V4L/DVB (9769): tuner-xc2028: powers device of when not used 

Since the firmware load is now fast on most boards, better to keep the tuner
off by default. A modprobe parameter were added to keep the old behavior,
to be used by old devices.

Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
This commit is contained in:
Mauro Carvalho Chehab 2008-12-05 10:31:16 -03:00
parent 9e5d6760c2
commit 74a89b2ae3
1 changed files with 31 additions and 0 deletions
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31
drivers/media/common/tuners/tuner-xc2028.c
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@ -28,6 +28,12 @@ static int debug;
module_param(debug, int, 0644);
MODULE_PARM_DESC(debug, "enable verbose debug messages");
static int no_poweroff;
module_param(no_poweroff, int, 0644);
MODULE_PARM_DESC(debug, "0 (default) powers device off when not used.\n"
"1 keep device energized and with tuner ready all the times.\n"
" Faster, but consumes more power and keeps the device hotter\n");
static char audio_std[8];
module_param_string(audio_std, audio_std, sizeof(audio_std), 0);
MODULE_PARM_DESC(audio_std,
@ -1091,6 +1097,30 @@ static int xc2028_set_params(struct dvb_frontend *fe,
T_DIGITAL_TV, type, 0, demod);
}
static int xc2028_sleep(struct dvb_frontend *fe)
{
struct xc2028_data *priv = fe->tuner_priv;
int rc = 0;
/* Avoid firmware reload on slow devices */
if (no_poweroff)
return;
tuner_dbg("Putting xc2028/3028 into poweroff mode.\n");
mutex_lock(&priv->lock);
if (priv->firm_version < 0x0202)
rc = send_seq(priv, {0x00, 0x08, 0x00, 0x00});
else
rc = send_seq(priv, {0x80, 0x08, 0x00, 0x00});
priv->cur_fw.type = 0; /* need firmware reload */
mutex_unlock(&priv->lock);
return rc;
}
static int xc2028_dvb_release(struct dvb_frontend *fe)
{
@ -1171,6 +1201,7 @@ static const struct dvb_tuner_ops xc2028_dvb_tuner_ops = {
.get_frequency = xc2028_get_frequency,
.get_rf_strength = xc2028_signal,
.set_params = xc2028_set_params,
.sleep = xc2028_sleep,
};
struct dvb_frontend *xc2028_attach(struct dvb_frontend *fe,