96 lines
4.1 KiB
Diff
96 lines
4.1 KiB
Diff
From linux-omap-owner@vger.kernel.org Tue Jun 24 09:24:30 2008
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Date: Tue, 24 Jun 2008 01:11:21 -0600 (MDT)
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From: Paul Walmsley <paul@pwsan.com>
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To: linux-omap@vger.kernel.org
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Subject: [PATCH] OMAP3 clock: fix DPLL jitter correction and rate
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programming
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Message-ID: <alpine.DEB.1.00.0806240109440.9741@utopia.booyaka.com>
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X-OriginalArrivalTime: 24 Jun 2008 07:20:48.0265 (UTC) FILETIME=[D325F790:01C8D5CA]
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Fix DPLL jitter correction programming. Previously,
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omap3_noncore_dpll_program() stored the FREQSEL jitter correction
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parameter to the wrong register. This caused jitter correction to be set
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incorrectly and also caused the DPLL divider to be programmed incorrectly.
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Also, fix DPLL divider programming. An off-by-one error existed in
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omap3_noncore_dpll_program(), causing DPLLs to be programmed with a higher
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divider than intended.
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Signed-off-by: Paul Walmsley <paul@pwsan.com>
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---
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arch/arm/mach-omap2/clock34xx.c | 13 ++++++++-----
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1 files changed, 8 insertions(+), 5 deletions(-)
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diff --git a/arch/arm/mach-omap2/clock34xx.c b/arch/arm/mach-omap2/clock34xx.c
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index 408b51a..8fdf8f3 100644
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--- a/arch/arm/mach-omap2/clock34xx.c
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+++ b/arch/arm/mach-omap2/clock34xx.c
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@@ -346,14 +346,17 @@ static int omap3_noncore_dpll_program(struct clk *clk, u16 m, u8 n, u16 freqsel)
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/* 3430 ES2 TRM: 4.7.6.9 DPLL Programming Sequence */
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_omap3_noncore_dpll_bypass(clk);
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+ /* Set jitter correction */
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+ v = __raw_readl(dd->control_reg);
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+ v &= ~dd->freqsel_mask;
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+ v |= freqsel << __ffs(dd->freqsel_mask);
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+ __raw_writel(v, dd->control_reg);
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+
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+ /* Set DPLL multiplier, divider */
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v = __raw_readl(dd->mult_div1_reg);
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v &= ~(dd->mult_mask | dd->div1_mask);
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-
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- /* Set mult (M), div1 (N), freqsel */
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v |= m << __ffs(dd->mult_mask);
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- v |= n << __ffs(dd->div1_mask);
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- v |= freqsel << __ffs(dd->freqsel_mask);
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-
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+ v |= (n - 1) << __ffs(dd->div1_mask);
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__raw_writel(v, dd->mult_div1_reg);
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/* We let the clock framework set the other output dividers later */
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--
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