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[media] drx-j: Allow userspace control of LNA 

Instead of just disabling the LNA every time, allow to control it from
userspace.

Acked-by: Devin Heitmueller <dheitmueller@kernellabs.com>
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>
This commit is contained in:
Mauro Carvalho Chehab 2014-02-16 00:38:44 -03:00
parent 244c0e06bf
commit ea8f3c2c60
1 changed files with 41 additions and 0 deletions
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41
drivers/media/dvb-frontends/drx39xyj/drxj.c
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@ -20683,6 +20683,46 @@ static int drx39xxj_init(struct dvb_frontend *fe)
return 0;
}
static int drx39xxj_set_lna(struct dvb_frontend *fe)
{
int result;
struct dtv_frontend_properties *c = &fe->dtv_property_cache;
struct drx39xxj_state *state = fe->demodulator_priv;
struct drx_demod_instance *demod = state->demod;
struct drxj_data *ext_attr = demod->my_ext_attr;
struct drxuio_cfg uio_cfg;
struct drxuio_data uio_data;
if (c->lna) {
if (!ext_attr->has_lna) {
pr_err("LNA is not supported on this device!\n");
return -EINVAL;
}
}
/* Turn off the LNA */
uio_cfg.uio = DRX_UIO1;
uio_cfg.mode = DRX_UIO_MODE_READWRITE;
/* Configure user-I/O #3: enable read/write */
result = ctrl_set_uio_cfg(demod, &uio_cfg);
if (result) {
pr_err("Failed to setup LNA GPIO!\n");
return result;
}
uio_data.uio = DRX_UIO1;
uio_data.value = c->lna;
result = ctrl_uio_write(demod, &uio_data);
if (result != 0) {
pr_err("Failed to %sable LNA!\n",
c->lna ? "en" : "dis");
return result;
}
return 0;
}
static int drx39xxj_get_tune_settings(struct dvb_frontend *fe,
struct dvb_frontend_tune_settings *tune)
{
@ -20824,6 +20864,7 @@ static struct dvb_frontend_ops drx39xxj_ops = {
.read_snr = drx39xxj_read_snr,
.read_ucblocks = drx39xxj_read_ucblocks,
.release = drx39xxj_release,
.set_lna = drx39xxj_set_lna,
};
MODULE_DESCRIPTION("Micronas DRX39xxj Frontend");