linux-kernel - Re: [PATCH v3 0/6] clk: sunxi: fixes, cleanups and A23 basic clocks

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Date:	Thu, 26 Jun 2014 10:51:08 +0800
From:	Chen-Yu Tsai <wens@...e.org>
To:	Maxime Ripard <maxime.ripard@...e-electrons.com>
Cc:	Mike Turquette <mturquette@...aro.org>,
	Emilio Lopez <emilio@...pez.com.ar>,
	linux-arm-kernel <linux-arm-kernel@...ts.infradead.org>,
	devicetree <devicetree@...r.kernel.org>,
	linux-kernel <linux-kernel@...r.kernel.org>,
	linux-sunxi <linux-sunxi@...glegroups.com>
Subject: Re: [PATCH v3 0/6] clk: sunxi: fixes, cleanups and A23 basic clocks

On Thu, Jun 26, 2014 at 4:14 AM, Maxime Ripard
<maxime.ripard@...e-electrons.com> wrote:
> On Tue, Jun 24, 2014 at 05:59:34PM +0800, Chen-Yu Tsai wrote:
>> Hi everyone,
>>
>> This is a followup series to my A23 bare-minimum bringup series [1],
>> which adds basic clock support for the A23 SoC. It is one of many
>> split up from the original A23 series [2]. Yet to come are more
>> clocks, reset controllers, pinctrl, prcm, and mmc.
>>
>> The first patch fixes the reworked clock protection code merged in
>> 3.16-rc1, which unintentionally made clock gates unprotectable.
>>
>> The second patch moves the remaining "ahb_sdram" clock to the
>> protected clock list, now that it works.
>>
>> The third patch adds support for factor clocks that have an N factor
>> not starting from 0. This is found on some PLLs in A31/A23.
>>
>> The fourth patch adds table-based dividers for div clocks, as some
>> clocks, such as apb0 divider on sun4/5/7i, apb1 on sun6/8i and axi
>> on sun8i.
>>
>> The fifth patch adds support for the basic clocks in the A23, just
>> PLL1 for cpus, and the system bus clocks and gates.
>>
>> The last patch adds the DT nodes for the newly added clocks.
>>
>> Patch 1 should be merged for 3.16, while the rest should go in 3.17.
>
> Why should it go in for 3.16? Is there any user for it yet?

Yes. Your patch

   efb3184 clk: sun6i: Protect SDRAM gating bit

from the series that added the new clock protection code.
This adds "ahb1_sdram" to the list.

Now, on my sun8i tablet, disabling "ahb1_sdram" doesn't seem to
affect the system. So I'm not sure what this clock actually does.


ChenYu
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