linux-kernel - Re: [PATCH V2] PM / clk: Add support for obtaining clocks from device-tree

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Message-ID: <CAJZ5v0hsRDP1O0_WtFicRnF7UCxtANE_ZaSpa8QNV7O5HNZfsQ@mail.gmail.com>
Date:	Wed, 9 Mar 2016 21:32:44 +0100
From:	"Rafael J. Wysocki" <rafael@...nel.org>
To:	Jon Hunter <jonathanh@...dia.com>
Cc:	"Rafael J. Wysocki" <rafael@...nel.org>,
	"Rafael J. Wysocki" <rjw@...ysocki.net>,
	Geert Uytterhoeven <geert@...ux-m68k.org>,
	"linux-pm@...r.kernel.org" <linux-pm@...r.kernel.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	linux-tegra@...r.kernel.org
Subject: Re: [PATCH V2] PM / clk: Add support for obtaining clocks from device-tree

On Wed, Mar 9, 2016 at 5:57 PM, Jon Hunter <jonathanh@...dia.com> wrote:
>
> On 09/03/16 14:04, Rafael J. Wysocki wrote:
>> On Wed, Mar 9, 2016 at 2:13 PM, Jon Hunter <jonathanh@...dia.com> wrote:
>>> The PM clocks framework requires clients to pass either a con-id or a
>>> valid clk pointer in order to add a clock to a device. Add a new
>>> function of_pm_clk_add_clks() to allows device clocks to be retrieved
>>> from device-tree and populated for a given device. Note that
>>> of_clk_get_from_provider() is not defined if CONFIG_OF and
>>> CONFIG_COMMON_CLK are not selected. Therefore, make of_pm_clk_add_clks()
>>> dependent on these options.
>>>
>>> An optional function pointer may be passed to of_pm_clk_add_clks() that
>>> can be used to filter the clocks that are added for a device when
>>> calling of_pm_clk_add_clks().
>>>
>>> In order to handle errors encountered when adding clocks from
>>> device-tree, add a function pm_clk_remove_clk() to remove any clocks
>>> (using a pointer to the clk structure) that have been added
>>> successfully before the error occurred.
>>>
>>> Signed-off-by: Jon Hunter <jonathanh@...dia.com>
>>> ---
>>>
>>> Changes v1-v2:
>>> - Added support for optional filter function as suggested by Geert U.
>>
>> I'd like to get an ACK on this from someone more familiar with the DT
>> stuff than I am.
>
> No problem. Is Geert's ACK sufficient or is there someone else I should add?

It would do.

Thanks,
Rafael