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radio: rda5807: fix tuning issues #15

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radio: rda5807: fix tuning issues #15

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8 changes: 5 additions & 3 deletions drivers/media/radio/radio-rda5807.c
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Original file line number Diff line number Diff line change
Expand Up @@ -423,13 +423,15 @@ static int rda5807_vidioc_s_frequency(struct file *file, void *fh,
if (err)
return err;

/* select 25 kHz channel spacing */
/* select 50 kHz channel spacing because 25kHz can't
* cover the whole 76-108 MHz range */
mask |= RDA5807_CHAN_SPACE;
val |= FIELD_PREP(RDA5807_CHAN_SPACE, 0x3);
val |= FIELD_PREP(RDA5807_CHAN_SPACE, 0x2);

/* select frequency */
mask |= RDA5807_CHAN_WRCHAN;
val |= FIELD_PREP(RDA5807_CHAN_WRCHAN, (a->frequency + 200) / 400);
val |= FIELD_PREP(RDA5807_CHAN_WRCHAN,
(a->frequency - band->rangelow + 400) / 800);

err = regmap_update_bits(radio->map, RDA5807_REG_CHAN, mask, val);
if (err)
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