Messages in this thread Patch in this message | | | Date | Sun, 08 Oct 2006 14:46:16 -0400 | From | Michael Krufky <> | Subject | [2.6.17.y PATCH 2/2] cx24123: fix PLL divisor setup |
| |
From df9b6db4d2168cd82f8590d2f9a2d3580cdf7233 Mon Sep 17 00:00:00 2001 From: Yeasah Pell <yeasah@schwide.net> Date: Tue, 3 Oct 2006 21:57:08 -0400 Subject: [PATCH] cx24123: fix PLL divisor setup
The cx24109 datasheet says: "NOTE: if A=0, then N=N+1"
The current code is the result of a misinterpretation of the datasheet to mean exactly the opposite of the requirement -- The actual value of N is 1 greater than the value written when A is 0, so 1 needs to be *subtracted* from it to compensate.
Signed-off-by: Yeasah Pell <yeasah@schwide.net> Signed-off-by: Steven Toth <stoth@hauppauge.com> Signed-off-by: Michael Krufky <mkrufky@linuxtv.org> --- drivers/media/dvb/frontends/cx24123.c | 4 ++-- 1 files changed, 2 insertions(+), 2 deletions(-)
diff --git a/drivers/media/dvb/frontends/cx24123.c b/drivers/media/dvb/frontends/cx24123.c index 691dc84..afb08ff 100644 --- a/drivers/media/dvb/frontends/cx24123.c +++ b/drivers/media/dvb/frontends/cx24123.c @@ -579,8 +579,8 @@ static int cx24123_pll_calculate(struct ndiv = ( ((p->frequency * vco_div * 10) / (2 * XTAL / 1000)) / 32) & 0x1ff; adiv = ( ((p->frequency * vco_div * 10) / (2 * XTAL / 1000)) % 32) & 0x1f; - if (adiv == 0) - ndiv++; + if (adiv == 0 && ndiv > 0) + ndiv--; /* control bits 11, refdiv 11, charge pump polarity 1, charge pump current, ndiv, adiv */ state->pllarg = (3 << 19) | (3 << 17) | (1 << 16) | (pump << 14) | (ndiv << 5) | adiv; - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
| |