linux-kernel - Re: [PATCH 2/2] clk: tegra: Use definition for pll

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Date:	Wed, 13 Jan 2016 17:19:31 +0100
From:	Thierry Reding <thierry.reding@...il.com>
To:	Rhyland Klein <rklein@...dia.com>
Cc:	Jon Hunter <jonathanh@...dia.com>,
	Peter De Schrijver <pdeschrijver@...dia.com>,
	Prashant Gaikwad <pgaikwad@...dia.com>,
	Michael Turquette <mturquette@...libre.com>,
	Stephen Boyd <sboyd@...eaurora.org>,
	Stephen Warren <swarren@...dotorg.org>,
	Alexandre Courbot <gnurou@...il.com>,
	linux-clk@...r.kernel.org, linux-tegra@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 2/2] clk: tegra: Use definition for pll_u override bit

On Wed, Jan 13, 2016 at 11:10:53AM -0500, Rhyland Klein wrote:
> On 1/13/2016 11:08 AM, Thierry Reding wrote:
> > * PGP Signed by an unknown key
> > 
> > On Mon, Dec 21, 2015 at 12:56:32PM +0000, Jon Hunter wrote:
> >> The definition, PLLU_BASE_OVERRIDE, for the pll_u OVERRIDE bit is defined
> >> but not used and when the OVERRIDE bit is cleared in tegra210_pll_init()
> >> the code directly uses the bit number. Therefore, use the definition,
> >> PLLU_BASE_OVERRIDE when clearing the OVERRIDE bit.
> >>
> >> Signed-off-by: Jon Hunter <jonathanh@...dia.com>
> >> ---
> >>  drivers/clk/tegra/clk-tegra210.c | 2 +-
> >>  1 file changed, 1 insertion(+), 1 deletion(-)
> >>
> >> diff --git a/drivers/clk/tegra/clk-tegra210.c b/drivers/clk/tegra/clk-tegra210.c
> >> index 791215747863..6f043c5e2394 100644
> >> --- a/drivers/clk/tegra/clk-tegra210.c
> >> +++ b/drivers/clk/tegra/clk-tegra210.c
> >> @@ -2520,7 +2520,7 @@ static void __init tegra210_pll_init(void __iomem *clk_base,
> >>  
> >>  	/* PLLU_VCO */
> >>  	val = readl(clk_base + pll_u_vco_params.base_reg);
> >> -	val &= ~BIT(24); /* disable PLLU_OVERRIDE */
> >> +	val &= ~PLLU_BASE_OVERRIDE; /* disable PLLU_OVERRIDE */
> >>  	writel(val, clk_base + pll_u_vco_params.base_reg);
> >>  
> >>  	clk = tegra_clk_register_pllre("pll_u_vco", "pll_ref", clk_base, pmc,
> > 
> > I think the comment is now redundant, given that the code says pretty
> > much the same thing. No need to respin for that, I can remove the
> > comment when I apply the patch. That is, unless anyone feels strongly
> > about keeping the comment.
> 
> I agree its redundant. If I am going to post a new version to address
> other concerns, I can just roll this in while doing so.

This looks like a good fix, or cleanup, on its own. So no need for
anyone to carry this forward, I can pick it up into a fixes branch
for v4.5.

Thierry

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