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[media] em28xx: PCTV tripleStick (292e) LNA support

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External LNA between antenna connector and RF tuner is controlled
by EM28178 GPIO 0. GPIO value 1 is LNA active and value 0 is LNA
disabled.

Signed-off-by: Antti Palosaari <crope@iki.fi>
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>
This commit is contained in:
Antti Palosaari 2014-04-22 22:56:54 -03:00 committed by Mauro Carvalho Chehab
parent 722a042de7
commit ffb9948e65
1 changed files with 16 additions and 0 deletions
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16
drivers/media/usb/em28xx/em28xx-dvb.c
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@ -746,6 +746,21 @@ static int em28xx_pctv_290e_set_lna(struct dvb_frontend *fe)
#endif
}
static int em28xx_pctv_292e_set_lna(struct dvb_frontend *fe)
{
struct dtv_frontend_properties *c = &fe->dtv_property_cache;
struct em28xx_i2c_bus *i2c_bus = fe->dvb->priv;
struct em28xx *dev = i2c_bus->dev;
u8 lna;
if (c->lna == 1)
lna = 0x01;
else
lna = 0x00;
return em28xx_write_reg_bits(dev, EM2874_R80_GPIO_P0_CTRL, lna, 0x01);
}
static int em28xx_mt352_terratec_xs_init(struct dvb_frontend *fe)
{
/* Values extracted from a USB trace of the Terratec Windows driver */
@ -1553,6 +1568,7 @@ static int em28xx_dvb_init(struct em28xx *dev)
}
dvb->i2c_client_tuner = client;
dvb->fe[0]->ops.set_lna = em28xx_pctv_292e_set_lna;
}
break;
default: