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From: Chen-Yu Tsai <wens@csie.org>
Date: Mon, 18 May 2015 22:45:29 +0800
Message-ID: <CAGb2v64SQZ74E5zn3XwgLtBh_PN=24bQ8RJ4oj8C+Gy0qAgtHA@mail.gmail.com>
Subject: Re: [PATCH v2 03/10] clk: sunxi: Let divs clocks read the base factor
 clock name from devicetree
To: Jens Kuske <jenskuske@gmail.com>
Cc: Chen-Yu Tsai <wens@csie.org>, VishnuPatekar <vishnupatekar0510@gmail.com>,
        Rob Herring <robh+dt@kernel.org>,
        linux-kernel <linux-kernel@vger.kernel.org>,
        Mike Turquette <mturquette@linaro.org>,
        devicetree <devicetree@vger.kernel.org>,
        Hans de Goede <hdegoede@redhat.com>,
        Linus Walleij <linus.walleij@linaro.org>,
        Maxime Ripard <maxime.ripard@free-electrons.com>,
        linux-arm-kernel <linux-arm-kernel@lists.infradead.org>,
        linux-sunxi <linux-sunxi@googlegroups.com>,
        =?UTF-8?Q?Emilio_L=C3=B3pez?= <emilio@elopez.com.ar>
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On Mon, May 18, 2015 at 5:15 PM, Jens Kuske <jenskuske@gmail.com> wrote:
> Hi,
>
> On 05/16/15 04:10, Chen-Yu Tsai wrote:
>> 2015年5月16日 上午12:39於 "Jens Kuske" <jenskuske@gmail.com>寫道：
> [..]
>>> @@ -1141,6 +1133,7 @@ static void __init sunxi_divs_clk_setup(struct
>> device_node *node,
>>>         struct clk_gate *gate = NULL;
>>>         struct clk_fixed_factor *fix_factor;
>>>         struct clk_divider *divider;
>>> +       struct factors_data factors = *data->factors;
>
> Isn't this a copy?

You're right. Sorry for the noise.

>
>>>         void __iomem *reg;
>>>         int ndivs = SUNXI_DIVS_MAX_QTY, i = 0;
>>>         int flags, clkflags;
>>> @@ -1149,8 +1142,17 @@ static void __init sunxi_divs_clk_setup(struct
>> device_node *node,
>>>         if (data->ndivs)
>>>                 ndivs = data->ndivs;
>>>
>>> +       /* Try to find a name for base factor clock */
>>> +       for (i = 0; i < ndivs; i++) {
>>> +               if (data->div[i].self) {
>>> +                       of_property_read_string_index(node,
>> "clock-output-names",
>>> +                                                     i, &factors.name);
>>
>> Please excuse the bad formatting.
>> I'm at the airport without my laptop.
>>
>> This will not work. All the static factors_data structs are const.
>> You should make a copy of it, maybe on the stack,
>> update the .name field, and pass that to sunxi_factors_clk_setup().
>>
>
> If I didn't miss anything, or misunderstood what you want to copy, this
> should be working fine.
>
> Jens
>
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