linux-kernel - Re: [PATCH 1/2] clk: shmobile: add Renesas R-Car Gen3 CPG support

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Message-ID: <CAMuHMdXhroy4BVRyeeu2uEnPvVehXNjac09RKWr49LA=0Yk=0g@mail.gmail.com>
Date:	Wed, 26 Aug 2015 09:29:01 +0200
From:	Geert Uytterhoeven <geert@...ux-m68k.org>
To:	Stephen Boyd <sboyd@...eaurora.org>
Cc:	Kuninori Morimoto <kuninori.morimoto.gx@...esas.com>,
	Michael Turquette <mturquette@...libre.com>,
	Simon Horman <horms+renesas@...ge.net.au>,
	Magnus <magnus.damm@...il.com>,
	Linux-SH <linux-sh@...r.kernel.org>,
	Linux-Kernel <linux-kernel@...r.kernel.org>,
	Geert Uytterhoeven <geert+renesas@...der.be>,
	linux-clk@...r.kernel.org
Subject: Re: [PATCH 1/2] clk: shmobile: add Renesas R-Car Gen3 CPG support

Hi Stephen,

On Wed, Aug 26, 2015 at 12:46 AM, Stephen Boyd <sboyd@...eaurora.org> wrote:
>> --- /dev/null
>> +++ b/drivers/clk/shmobile/clk-rcar-gen3.c

>> +
>> +/*
>> + * Reset register definitions.
>> + */
>> +#define MODEMR 0xe6160060
>> +
>> +static u32 rcar_gen3_read_mode_pins(void)
>> +{
>> +     static u32 mode;
>> +     static bool mode_valid;
>> +
>> +     if (!mode_valid) {
>> +             void __iomem *modemr = ioremap_nocache(MODEMR, 4);
>> +
>> +             BUG_ON(!modemr);
>> +             mode = ioread32(modemr);
>> +             iounmap(modemr);
>> +             mode_valid = true;
>> +     }
>> +
>> +     return mode;
>> +}
>
> Perhaps this should be read using a syscon?

Like "[PATCH/RFC 00/11] ARM: shmobile: Let CPG use syscon for MD pin values"
(http://www.spinics.net/lists/linux-clk/msg01478.html)?

It wasn't so well received...

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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