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-rw-r--r--drivers/media/dvb-frontends/stb0899_algo.c4
-rw-r--r--drivers/media/dvb-frontends/stb0899_drv.h4
2 files changed, 4 insertions, 4 deletions
diff --git a/drivers/media/dvb-frontends/stb0899_algo.c b/drivers/media/dvb-frontends/stb0899_algo.c
index 14d720ba1207..e0d31a2ea578 100644
--- a/drivers/media/dvb-frontends/stb0899_algo.c
+++ b/drivers/media/dvb-frontends/stb0899_algo.c
@@ -444,7 +444,7 @@ static enum stb0899_status stb0899_check_range(struct stb0899_state *state)
int range_offst, tp_freq;
range_offst = internal->srch_range / 2000;
- tp_freq = internal->freq + (internal->derot_freq * internal->mclk) / 1000;
+ tp_freq = internal->freq - (internal->derot_freq * internal->mclk) / 1000;
if ((tp_freq >= params->freq - range_offst) && (tp_freq <= params->freq + range_offst)) {
internal->status = RANGEOK;
@@ -638,7 +638,7 @@ enum stb0899_status stb0899_dvbs_algo(struct stb0899_state *state)
"RANGE OK ! derot freq=%d, mclk=%d",
internal->derot_freq, internal->mclk);
- internal->freq = params->freq + ((internal->derot_freq * internal->mclk) / 1000);
+ internal->freq = params->freq - ((internal->derot_freq * internal->mclk) / 1000);
reg = stb0899_read_reg(state, STB0899_PLPARM);
internal->fecrate = STB0899_GETFIELD(VITCURPUN, reg);
dprintk(state->verbose, FE_DEBUG, 1,
diff --git a/drivers/media/dvb-frontends/stb0899_drv.h b/drivers/media/dvb-frontends/stb0899_drv.h
index 1ddad6a8cc07..139264d19263 100644
--- a/drivers/media/dvb-frontends/stb0899_drv.h
+++ b/drivers/media/dvb-frontends/stb0899_drv.h
@@ -45,8 +45,8 @@ struct stb0899_s2_reg {
};
enum stb0899_inversion {
- IQ_SWAP_OFF = 0,
- IQ_SWAP_ON,
+ IQ_SWAP_OFF = +1, /* inversion affects the sign of e. g. */
+ IQ_SWAP_ON = -1, /* the derotator frequency register */
};
#define STB0899_GPIO00 0xf140
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