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V4L/DVB (7575): mt312: add attach-time setting to invert lnb-voltage

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Add a setting to config struct for inversion of lnb-voltage.
Needed for support of Avermedia A700 cards.

Signed-off-by: Matthias Schwarzott <zzam@gentoo.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
This commit is contained in:
Matthias Schwarzott 2008-04-12 15:04:50 -03:00 committed by Mauro Carvalho Chehab
parent 6a5cbd591c
commit 11d3f32393
2 changed files with 9 additions and 1 deletions
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7
drivers/media/dvb/frontends/mt312.c
View File

@ -422,11 +422,16 @@ static int mt312_set_voltage(struct dvb_frontend *fe, const fe_sec_voltage_t v)
{
struct mt312_state *state = fe->demodulator_priv;
const u8 volt_tab[3] = { 0x00, 0x40, 0x00 };
u8 val;
if (v > SEC_VOLTAGE_OFF)
return -EINVAL;
return mt312_writereg(state, DISEQC_MODE, volt_tab[v]);
val = volt_tab[v];
if (state->config->voltage_inverted)
val ^= 0x40;
return mt312_writereg(state, DISEQC_MODE, val);
}
static int mt312_read_status(struct dvb_frontend *fe, fe_status_t *s)

3
drivers/media/dvb/frontends/mt312.h
View File

@ -31,6 +31,9 @@
struct mt312_config {
/* the demodulator's i2c address */
u8 demod_address;
/* inverted voltage setting */
int voltage_inverted:1;
};
#if defined(CONFIG_DVB_MT312) || (defined(CONFIG_DVB_MT312_MODULE) && defined(MODULE))