Gitweb:
http://git.kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=78f3b0b672c79df9ffa55399a7d6fc4b173e9b4b
Commit: 78f3b0b672c79df9ffa55399a7d6fc4b173e9b4b
Parent: 820eacd84cff23b76693f4be1e28feb672f4488f
Author: Chris Pascoe <[EMAIL PROTECTED]>
AuthorDate: Mon Nov 19 03:47:07 2007 -0300
Committer: Mauro Carvalho Chehab <[EMAIL PROTECTED]>
CommitDate: Tue Dec 11 18:08:13 2007 -0200
V4L/DVB (6629): zl10353: fix default adc_clock and TRL nominal rate
calculation
The default adc_clock for the zl10353 is different from what was originally
thought to be the case and the TRL nominal rate formula was incorrect as a
result. Use a better (and hopefully now correct) formula.
Signed-off-by: Chris Pascoe <[EMAIL PROTECTED]>
Signed-off-by: Mauro Carvalho Chehab <[EMAIL PROTECTED]>
---
drivers/media/dvb/frontends/zl10353.c | 4 ++--
drivers/media/dvb/frontends/zl10353.h | 2 +-
2 files changed, 3 insertions(+), 3 deletions(-)
diff --git a/drivers/media/dvb/frontends/zl10353.c
b/drivers/media/dvb/frontends/zl10353.c
index a97a7fd..0106df4 100644
--- a/drivers/media/dvb/frontends/zl10353.c
+++ b/drivers/media/dvb/frontends/zl10353.c
@@ -122,7 +122,7 @@ static void zl10353_calc_nominal_rate(struct dvb_frontend
*fe,
enum fe_bandwidth bandwidth,
u16 *nominal_rate)
{
- u32 adc_clock = 22528; /* 20.480 MHz on the board(!?) */
+ u32 adc_clock = 45056; /* 45.056 MHz */
u8 bw;
struct zl10353_state *state = fe->demodulator_priv;
@@ -142,7 +142,7 @@ static void zl10353_calc_nominal_rate(struct dvb_frontend
*fe,
break;
}
- *nominal_rate = (64 * bw * (1<<16) / (7 * 8) * 4000 / adc_clock + 2) /
4;
+ *nominal_rate = (bw * (1 << 23) / 7 * 125 + adc_clock / 2) / adc_clock;
dprintk("%s: bw %d, adc_clock %d => 0x%x\n",
__FUNCTION__, bw, adc_clock, *nominal_rate);
diff --git a/drivers/media/dvb/frontends/zl10353.h
b/drivers/media/dvb/frontends/zl10353.h
index cb274dc..1c3d494 100644
--- a/drivers/media/dvb/frontends/zl10353.h
+++ b/drivers/media/dvb/frontends/zl10353.h
@@ -30,7 +30,7 @@ struct zl10353_config
u8 demod_address;
/* frequencies in kHz */
- int adc_clock; // default: 22528
+ int adc_clock; /* default: 45056 */
/* set if no pll is connected to the secondary i2c bus */
int no_tuner;
-
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