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

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Message-ID: <55C9DF7B.4040308@st.com>
Date:	Tue, 11 Aug 2015 13:41:47 +0200
From:	Maxime Coquelin <maxime.coquelin@...com>
To:	Geert Uytterhoeven <geert@...ux-m68k.org>
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

Sorry Geert, my reply has been cut:

On 08/11/2015 01:36 PM, Maxime Coquelin wrote:
> Hi Geert,
>
> On 08/11/2015 12:11 PM, Geert Uytterhoeven wrote:
>> Hi Maxime,
>>
>> 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.

Kind regards,
Maxime
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