RE: [PATCH] OMAP3 clock: put DPLL into bypass if bypass rate = clk->rate, not hardware rate

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Hi,

The three patches you sent (fix CONFIG_OMAP_RESET_CLOCKS, fix
dss1_alwon_clk and this one) seem to fix problems I was seeing with
retention.

-Tero

>-----Original Message-----
>From: ext Paul Walmsley [mailto:paul@xxxxxxxxx] 
>Sent: 25 September, 2008 17:39
>To: linux-omap@xxxxxxxxxxxxxxx
>Cc: Kristo Tero (Nokia-D/Tampere); rnayak@xxxxxx
>Subject: [PATCH] OMAP3 clock: put DPLL into bypass if bypass 
>rate = clk->rate, not hardware rate
>
>
>When a non-CORE DPLL is enabled via 
>omap3_noncore_dpll_enable(), use the user's desired rate in 
>clk->rate to determine whether to put the DPLL into bypass or 
>lock mode, rather than reading the DPLL's current idle state 
>from its hardware registers.
>
>This fixes a bug observed when leaving retention. Non-CORE 
>DPLLs were not being relocked when downstream clocks 
>re-enabled; rather, the DPLL entered bypass mode.
>
>Problem reported by Tero Kristo <tero.kristo@xxxxxxxxx>.
>
>Signed-off-by: Paul Walmsley <paul@xxxxxxxxx>
>---
> arch/arm/mach-omap2/clock34xx.c |    4 +---
> 1 files changed, 1 insertions(+), 3 deletions(-)
>
>diff --git a/arch/arm/mach-omap2/clock34xx.c 
>b/arch/arm/mach-omap2/clock34xx.c index c89d6bc..df258f7 100644
>--- a/arch/arm/mach-omap2/clock34xx.c
>+++ b/arch/arm/mach-omap2/clock34xx.c
>@@ -281,9 +281,7 @@ static int 
>omap3_noncore_dpll_enable(struct clk *clk)
> 	if (!dd)
> 		return -EINVAL;
> 
>-	rate = omap2_get_dpll_rate(clk);
>-
>-	if (dd->bypass_clk->rate == rate)
>+	if (clk->rate == dd->bypass_clk->rate)
> 		r = _omap3_noncore_dpll_bypass(clk);
> 	else
> 		r = _omap3_noncore_dpll_lock(clk);
>
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