linux-kernel - Re: [PATCH v5 01/10] clk: tegra: Refactor PLL programming code

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Date:	Mon, 4 Feb 2013 16:32:33 +0200
From:	Peter De Schrijver <pdeschrijver@...dia.com>
To:	Prashant Gaikwad <pgaikwad@...dia.com>
CC:	Grant Likely <grant.likely@...retlab.ca>,
	Rob Herring <rob.herring@...xeda.com>,
	Rob Landley <rob@...dley.net>,
	Stephen Warren <swarren@...dotorg.org>,
	Russell King <linux@....linux.org.uk>,
	Simon Glass <sjg@...omium.org>,
	Mike Turquette <mturquette@...aro.org>,
	Joseph Lo <josephl@...dia.com>,
	"devicetree-discuss@...ts.ozlabs.org" 
	<devicetree-discuss@...ts.ozlabs.org>,
	"linux-doc@...r.kernel.org" <linux-doc@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"linux-tegra@...r.kernel.org" <linux-tegra@...r.kernel.org>,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>
Subject: Re: [PATCH v5 01/10] clk: tegra: Refactor PLL programming code

On Mon, Feb 04, 2013 at 07:06:47AM +0100, Prashant Gaikwad wrote:
> On Friday 01 February 2013 03:48 PM, Peter De Schrijver wrote:

...

> >
> > -static int clk_pll_wait_for_lock(struct tegra_clk_pll *pll,
> > -                                void __iomem *lock_addr, u32 lock_bit_idx)
> > +static int clk_pll_wait_for_lock(struct tegra_clk_pll *pll)
> >   {
> >          int i;
> > -       u32 val;
> > +       u32 val, lock_bit;
> > +       void __iomem *lock_addr;
> >
> >          if (!(pll->flags & TEGRA_PLL_USE_LOCK)) {
> >                  udelay(pll->params->lock_delay);
> >                  return 0;
> >          }
> >
> > +       lock_addr = pll->clk_base + pll->params->base_reg;
> 
> This will not work for PLLE. Lock bit for PLLE is in misc register.
> 
> > +       lock_bit = BIT(pll->params->lock_bit_idx);
> > +
> >          for (i = 0; i < pll->params->lock_delay; i++) {
> >                  val = readl_relaxed(lock_addr);
> > -               if (val & BIT(lock_bit_idx)) {
> > +               if (val & lock_bit) {
> 
> Need to change the lock bit idx parameter for Tegra20 and Tegra30 PLLs 
> else this patch will break those.
> 

Looking at commit 37c26a906527b8a6a252614ca83d21ad318c4e84 and commit
b08e8c0ecc42afa3a2e1019851af741980dd5a6b, these fields seem correctly
initialized for both Tegra20 and Tegra30? Or am I missing something?

Thanks,

Peter.
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