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[media] m88ds3103: change .set_voltage() implementation 

Add some error checking and implement functionality a little bit
differently.

Cc: Nibble Max <nibble.max@gmail.com>
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 2014-08-21 21:06:13 -03:00 committed by Mauro Carvalho Chehab
parent 6380b975b7
commit d28677ffbc
1 changed files with 34 additions and 16 deletions
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50
drivers/media/dvb-frontends/m88ds3103.c
View File

@ -1038,36 +1038,54 @@ err:
}
static int m88ds3103_set_voltage(struct dvb_frontend *fe,
fe_sec_voltage_t voltage)
fe_sec_voltage_t fe_sec_voltage)
{
struct m88ds3103_priv *priv = fe->demodulator_priv;
u8 data;
int ret;
u8 u8tmp;
bool voltage_sel, voltage_dis;
m88ds3103_rd_reg(priv, 0xa2, &data);
dev_dbg(&priv->i2c->dev, "%s: fe_sec_voltage=%d\n", __func__,
fe_sec_voltage);
data &= ~0x03; /* bit0 V/H, bit1 off/on */
if (priv->cfg->lnb_en_pol)
data |= 0x02;
if (!priv->warm) {
ret = -EAGAIN;
goto err;
}
switch (voltage) {
switch (fe_sec_voltage) {
case SEC_VOLTAGE_18:
if (priv->cfg->lnb_hv_pol == 0)
data |= 0x01;
voltage_sel = 1;
voltage_dis = 0;
break;
case SEC_VOLTAGE_13:
if (priv->cfg->lnb_hv_pol)
data |= 0x01;
voltage_sel = 0;
voltage_dis = 0;
break;
case SEC_VOLTAGE_OFF:
if (priv->cfg->lnb_en_pol)
data &= ~0x02;
else
data |= 0x02;
voltage_sel = 0;
voltage_dis = 1;
break;
default:
dev_dbg(&priv->i2c->dev, "%s: invalid fe_sec_voltage\n",
__func__);
ret = -EINVAL;
goto err;
}
m88ds3103_wr_reg(priv, 0xa2, data);
/* output pin polarity */
voltage_sel ^= priv->cfg->lnb_hv_pol;
voltage_dis ^= priv->cfg->lnb_en_pol;
u8tmp = voltage_dis << 1 | voltage_sel << 0;
ret = m88ds3103_wr_reg_mask(priv, 0xa2, u8tmp, 0x03);
if (ret)
goto err;
return 0;
err:
dev_dbg(&priv->i2c->dev, "%s: failed=%d\n", __func__, ret);
return ret;
}
static int m88ds3103_diseqc_send_master_cmd(struct dvb_frontend *fe,