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[media] xc4000: fixed frequency error

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The xc_get_frequency_error() function reported the frequency error
incorrectly. The data read from the hardware is a signed integer, in
15625 Hz units. The attached patch fixes the bug.

Signed-off-by: Istvan Varga <istvan_v@mailbox.hu>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
This commit is contained in:
Istvan Varga 2011-06-03 12:27:30 -03:00 committed by Mauro Carvalho Chehab
parent 5614942bb0
commit 1368ceb266
1 changed files with 3 additions and 2 deletions
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5
drivers/media/common/tuners/xc4000.c
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@ -417,8 +417,9 @@ static int xc_get_frequency_error(struct xc4000_priv *priv, u32 *freq_error_hz)
if (result != XC_RESULT_SUCCESS)
return result;
tmp = (u32)regData;
(*freq_error_hz) = (tmp * 15625) / 1000;
tmp = (u32)regData & 0xFFFFU;
tmp = (tmp < 0x8000U ? tmp : 0x10000U - tmp);
(*freq_error_hz) = tmp * 15625;
return result;
}