Commit 35546945 authored by Duc-Long, Le's avatar Duc-Long, Le Committed by Hans Verkuil
Browse files

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: default avatarDuc-Long, Le <duclong.linux@gmail.com>
Signed-off-by: default avatarHans Verkuil <hverkuil-cisco@xs4all.nl>
parent feb8831b

drivers/media/i2c/tc358746.c

+2 −2
Original line number Diff line number Diff line
@@ -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) {