diff options
| author | Manu Abraham <abraham.manu@gmail.com> | 2009-04-08 20:30:29 -0300 |
|---|---|---|
| committer | Mauro Carvalho Chehab <mchehab@redhat.com> | 2009-06-16 18:20:40 -0300 |
| commit | da4b9059c948ce35ce9d34b982b6a9934a9251ef (patch) | |
| tree | 39c645ced9e29d6825a5184549062fd750ed1aec /drivers/media/dvb/frontends | |
| parent | 5f99feffc0426f88db07e2d777d9dd4aa2205c2f (diff) | |
V4L/DVB (11591): stv090x: code simplification
Signed-off-by: Manu Abraham <manu@linuxtv.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
Diffstat (limited to 'drivers/media/dvb/frontends')
| -rw-r--r-- | drivers/media/dvb/frontends/stv090x.c | 15 |
1 files changed, 7 insertions, 8 deletions
diff --git a/drivers/media/dvb/frontends/stv090x.c b/drivers/media/dvb/frontends/stv090x.c index b3a02790c9a..3e0acd7cc82 100644 --- a/drivers/media/dvb/frontends/stv090x.c +++ b/drivers/media/dvb/frontends/stv090x.c @@ -2222,23 +2222,22 @@ static enum stv090x_delsys stv090x_get_std(struct stv090x_state *state) static s32 stv090x_get_car_freq(struct stv090x_state *state, u32 mclk) { s32 derot, int_1, int_2, tmp_1, tmp_2; - u32 pow2; derot = STV090x_READ_DEMOD(state, CFR2) << 16; derot |= STV090x_READ_DEMOD(state, CFR1) << 8; derot |= STV090x_READ_DEMOD(state, CFR0); derot = comp2(derot, 24); - pow2 = 1 << 12; - int_1 = state->mclk / pow2; - int_2 = derot / pow2; + int_1 = state->mclk >> 12; + int_2 = derot >> 12; - tmp_1 = state->mclk % pow2; - tmp_2 = derot % pow2; + /* carrier_frequency = MasterClock * Reg / 2^24 */ + tmp_1 = state->mclk % 0x1000; + tmp_2 = derot % 0x1000; derot = (int_1 * int_2) + - ((int_1 * tmp_2) / pow2) + - ((int_1 * tmp_1) / pow2); + ((int_1 * tmp_2) >> 12) + + ((int_1 * tmp_1) >> 12); return derot; } |