linux-kernel - Re: [PATCH v3 08/10] clk: sunxi-ng: support R40 SoC

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Date:   Sat, 12 Aug 2017 12:04:14 +0800
From:   icenowy@...c.io
To:     Chen-Yu Tsai <wens@...e.org>
Cc:     Maxime Ripard <maxime.ripard@...e-electrons.com>,
        Rob Herring <robh+dt@...nel.org>,
        Linus Walleij <linus.walleij@...aro.org>,
        linux-doc@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-kernel@...r.kernel.org, devicetree@...r.kernel.org,
        linux-clk@...r.kernel.org, linux-gpio@...r.kernel.org
Subject: Re: [PATCH v3 08/10] clk: sunxi-ng: support R40 SoC

在 2017-05-29 15:34，Chen-Yu Tsai 写道：
> Hi,
> 
> On Sat, May 27, 2017 at 06:23:06PM +0800, Icenowy Zheng wrote:
>> Allwinner R40 SoC have a clock controller module in the style of the
>> SoCs beyond sun6i, however, it's more rich and complex.
>> 
>> Add support for it.
>> 
>> Signed-off-by: Icenowy Zheng <icenowy@...c.io>
>> ---
>> Changes in v3:
>> - Rebased on current linux-next.
>> Changes in v2:
>> - Fixes according to the SoC's user manual.
>> 
>>  drivers/clk/sunxi-ng/Kconfig              |   10 +
>>  drivers/clk/sunxi-ng/Makefile             |    1 +
>>  drivers/clk/sunxi-ng/ccu-sun8i-r40.c      | 1153 
>> +++++++++++++++++++++++++++++
>>  drivers/clk/sunxi-ng/ccu-sun8i-r40.h      |   68 ++
>>  include/dt-bindings/clock/sun8i-r40-ccu.h |  191 +++++
>>  include/dt-bindings/reset/sun8i-r40-ccu.h |  129 ++++
>>  6 files changed, 1552 insertions(+)
>>  create mode 100644 drivers/clk/sunxi-ng/ccu-sun8i-r40.c
>>  create mode 100644 drivers/clk/sunxi-ng/ccu-sun8i-r40.h
>>  create mode 100644 include/dt-bindings/clock/sun8i-r40-ccu.h
>>  create mode 100644 include/dt-bindings/reset/sun8i-r40-ccu.h
>> 
> ...
>> +static SUNXI_CCU_NM_WITH_GATE_LOCK(pll_ddr1_clk, "pll-ddr1",
>> +				   "osc24M", 0x04c,
>> +				   8, 7,	/* N */
> 
> N has minimum and maximum limits.

These constraints are never implemented in old SoCs.

>> --
>> 2.12.2
>>