linux-kernel - [PATCH] omap2: fix DPLL

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Message-ID: <87ei8726wf.fsf@vostro.fn.ogness.net>
Date:	Thu, 20 Jan 2011 11:42:24 +0100
From:	John Ogness <john.ogness@...utronix.de>
To:	paul@...an.com
Cc:	linux-kernel@...r.kernel.org
Subject: [PATCH] omap2: fix DPLL_FREQSEL calculation

Hi,

This patch fixes the calculation of the internal frequency. The value
of "n" is one less than the actual divider. 0 is a valid value.

An example where the internal frequency is calculated correctly can be
found here: clkt_dpll.c:_dpll_test_fint()

This patch is against linux-next-20110120.

Signed-off-by: John Ogness <john.ogness@...utronix.de>
---
 arch/arm/mach-omap2/dpll3xxx.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/arch/arm/mach-omap2/dpll3xxx.c	2011-01-20 11:20:41.706860086 +0100
+++ b/arch/arm/mach-omap2/dpll3xxx.c	2011-01-20 11:21:27.966860086 +0100
@@ -93,7 +93,7 @@ static u16 _omap3_dpll_compute_freqsel(s
 	unsigned long fint;
 	u16 f = 0;
 
-	fint = clk->dpll_data->clk_ref->rate / n;
+	fint = clk->dpll_data->clk_ref->rate / (n + 1);
 
 	pr_debug("clock: fint is %lu\n", fint);
 
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