linux-kernel - Re: [PATCH RFC RFT 3/3] clk: introduce CLK_ENABLE_HAND

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Message-ID: <CAMuHMdVvS2n=J5paZzXdtD0vZ4Q4m9k7XeF_MF1zV4pD-nk9aw@mail.gmail.com>
Date:	Tue, 11 Aug 2015 13:49:09 +0200
From:	Geert Uytterhoeven <geert@...ux-m68k.org>
To:	Maxime Coquelin <maxime.coquelin@...com>
Cc:	Lee Jones <lee.jones@...aro.org>,
	Michael Turquette <mturquette@...libre.com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	linux-clk@...r.kernel.org, Stephen Boyd <sboyd@...eaurora.org>,
	Maxime Ripard <maxime.ripard@...e-electrons.com>,
	Sascha Hauer <s.hauer@...gutronix.de>
Subject: Re: [PATCH RFC RFT 3/3] clk: introduce CLK_ENABLE_HAND_OFF flag

Hi Maxime,

On Tue, Aug 11, 2015 at 1:41 PM, Maxime Coquelin <maxime.coquelin@...com> wrote:
> On 08/11/2015 01:36 PM, Maxime Coquelin wrote:
>> On 08/11/2015 12:11 PM, Geert Uytterhoeven wrote:
>>> On Tue, Aug 11, 2015 at 12:02 PM, Maxime Coquelin
>>> <maxime.coquelin@...com> wrote:
>>>> How can we pass CLK_ENABLE_HAND_OFF flag to a specific clock on STi
>>>> platform?
>>>
>>> Add the flag to the relevant clocks in the C code, e.g. in
>>> clk_register_flexgen():
>>>
>>>          if (!strcmp(name, "clk-icn-cpu"))
>>>                  init.flags |= CLK_ENABLE_HAND_OFF;
>
> The main problem I see with this proposal is that clk_register_flexgen() is
> called for several SoCs (STiH407/410/418...).
> Each of these SoCs have this clock, but maybe STiH407 will need the flag,
> but not STiH410 and STiH418.
> So I think the best place to set this information is in DT, where the
> differentiation is made between the SoCs.

If (of_machine_is_compatible("st,stih410")) ...

Gr{oetje,eeting}s,

                        Geert

--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@...ux-m68k.org

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
                                -- Linus Torvalds
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