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V4L/DVB (8035): tda18271: dont touch EB14 if rf_cal lookup is out of range

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The TDA18271HD/C1 rf_cal map lookup is expected to go out of range outside
of the frequency window 41 MHz - 61.1 MHz.  In these cases, the internal
RF tracking filters calibration mechanism is used.

Signed-off-by: Michael Krufky <mkrufky@linuxtv.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
This commit is contained in:
Michael Krufky 2008-06-08 22:12:37 -03:00 committed by Mauro Carvalho Chehab
parent 44e645c203
commit 119a7c7e34
1 changed files with 9 additions and 1 deletions
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10
drivers/media/common/tuners/tda18271-common.c
View file

@ -649,9 +649,17 @@ int tda18271_calc_rf_cal(struct dvb_frontend *fe, u32 *freq)
u8 val;
int ret = tda18271_lookup_map(fe, RF_CAL, freq, &val);
/* The TDA18271HD/C1 rf_cal map lookup is expected to go out of range
* for frequencies above 61.1 MHz. In these cases, the internal RF
* tracking filters calibration mechanism is used.
*
* There is no need to warn the user about this.
*/
if (ret < 0)
goto fail;
regs[R_EB14] = val;
fail:
return ret;
}