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[media] rtl2832: Fix IF calculus 

Spectrum is inverted. So, we need to invert it when calculating the
value for the IF register

Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
Tested-by: Antti Palosaari <crope@iki.fi>
This commit is contained in:
Mauro Carvalho Chehab 2013-04-15 19:44:39 -03:00
parent b5e2b97b0b
commit c8832e8f42
1 changed files with 4 additions and 0 deletions
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4
drivers/media/dvb-frontends/rtl2832.c
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@ -396,7 +396,11 @@ static int rtl2832_set_if(struct dvb_frontend *fe, u32 if_freq)
pset_iffreq = if_freq % priv->cfg.xtal;
pset_iffreq *= 0x400000;
pset_iffreq = div_u64(pset_iffreq, priv->cfg.xtal);
pset_iffreq = -pset_iffreq;
pset_iffreq = pset_iffreq & 0x3fffff;
dev_dbg(&priv->i2c->dev, "%s: if_frequency=%d pset_iffreq=%08x\n",
__func__, if_freq, (unsigned)pset_iffreq);
ret = rtl2832_wr_demod_reg(priv, DVBT_EN_BBIN, en_bbin);
if (ret)
return ret;