linux-kernel - Re: [PATCH] clk: provide public clk_is

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Message-ID: <52527339.9090701@gmail.com>
Date:	Mon, 07 Oct 2013 10:39:21 +0200
From:	Sebastian Hesselbarth <sebastian.hesselbarth@...il.com>
To:	Mike Turquette <mturquette@...aro.org>
CC:	Andrew Lunn <andrew@...n.ch>,
	Uwe Kleine-König 
	<u.kleine-koenig@...gutronix.de>,
	Russell King <linux@....linux.org.uk>,
	Jason Cooper <jason@...edaemon.net>,
	Benjamin Herrenschmidt <benh@...nel.crashing.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Jason Gunthorpe <jgunthorpe@...idianresearch.com>,
	Ezequiel Garcia <ezequiel.garcia@...e-electrons.com>,
	Grant Likely <grant.likely@...aro.org>,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>
Subject: Re: [PATCH] clk: provide public clk_is_enabled function

On 10/06/2013 11:04 PM, Mike Turquette wrote:
> On Sun, Oct 6, 2013 at 3:24 PM, Sebastian Hesselbarth
> <sebastian.hesselbarth@...il.com> wrote:
>> Of course, we can do clk_enable, read, clk_disable as said before - and
>> given the amount of questions and misinterpretation, I think it is the
>> saner way.
>
> Sorry for any misinterpretation on my end. I agree reading the
> register(s) within a clk_enable/clk_disable-protected section is the
> most sane option.

Well, as you are not the only one misinterpreting the purpose, I
guess it is more about the clk_is_enabled() function itself. Uwe was
very right, that it will lead to patches using it in a wrong way.

Using the common enable/disable functions does no harm to our workaround
and we will use it.

Thanks for taking the time to raise those questions and surface those
critical interpretations early!

Sebastian

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