diff options
| author | Duc-Long, Le <duclong.linux@gmail.com> | 2023-10-15 03:19:46 +0300 |
|---|---|---|
| committer | Hans Verkuil <hverkuil-cisco@xs4all.nl> | 2024-02-05 14:57:44 +0300 |
| commit | 35546945e5e5cce825d2b92e1ecc3f4ac70ec1dc (patch) | |
| tree | eedf289016b0e439cb4bc1e927a047cda385d529 | |
| parent | feb8831be9d468ee961289c6a275536a1ee0011c (diff) | |
| download | linux-35546945e5e5cce825d2b92e1ecc3f4ac70ec1dc.tar.xz | |
media: tc358746: fix the pll calculating function
Following formula of Pll_clk in 5.2 section, 50th page of
TC358746AXBG/748XBG/748IXBG Functional Specification Rev 1.1 document.
The formula of fout is as below:
fout = refclk * mul / (prediv * postdiv)
Remove "p" to avoid using 2 times of prediv in pll calculating function.
Signed-off-by: Duc-Long, Le <duclong.linux@gmail.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
| -rw-r--r-- | drivers/media/i2c/tc358746.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/media/i2c/tc358746.c b/drivers/media/i2c/tc358746.c index 106de4271d2e..d676adc4401b 100644 --- a/drivers/media/i2c/tc358746.c +++ b/drivers/media/i2c/tc358746.c @@ -843,14 +843,14 @@ static unsigned long tc358746_find_pll_settings(struct tc358746 *tc358746, if (fin < 4 * HZ_PER_MHZ || fin > 40 * HZ_PER_MHZ) continue; - tmp = fout * p * postdiv; + tmp = fout * postdiv; do_div(tmp, fin); mul = tmp; if (mul > 511) continue; tmp = mul * fin; - do_div(tmp, p * postdiv); + do_div(tmp, postdiv); delta = abs(fout - tmp); if (delta < min_delta) { |