linux-kernel - Re: [PATCH v6 00/41] ARM: davinci: convert to common clock framework

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Message-ID: <CAMRc=MesQTvkVtPLOGr2G7-KSR=k35y24SsO4s8rDbCv=2-G7A@mail.gmail.com>
Date:   Mon, 22 Jan 2018 14:29:17 +0100
From:   Bartosz Golaszewski <brgl@...ev.pl>
To:     David Lechner <david@...hnology.com>
Cc:     linux-clk@...r.kernel.org, devicetree <devicetree@...r.kernel.org>,
        linux-arm-kernel@...ts.infradead.org,
        Michael Turquette <mturquette@...libre.com>,
        Stephen Boyd <sboyd@...eaurora.org>,
        Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Sekhar Nori <nsekhar@...com>,
        Kevin Hilman <khilman@...nel.org>,
        Bartosz Golaszewski <bgolaszewski@...libre.com>,
        Adam Ford <aford173@...il.com>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v6 00/41] ARM: davinci: convert to common clock framework

2018-01-20 18:13 GMT+01:00 David Lechner <david@...hnology.com>:
> This series converts mach-davinci to use the common clock framework.
>
> The series works like this, the first 19 patches create new clock drivers
> using the common clock framework. There are basically 3 groups of clocks -
> PLL, PSC and CFGCHIP (syscon). There are six different SoCs that each have
> unique init data, which is the reason for so many patches.
>
> Then, starting with "ARM: da830: add new clock init using common clock",
> we get the mach code ready for the switch by adding the code needed for
> the new clock drivers and adding #ifndef CONFIG_COMMON_CLK around the
> legacy clocks so that we can switch easily between the old and the new.
>
> "ARM: davinci: switch to common clock framework" actually flips the switch
> to start using the new clock drivers. Then the next 8 patches remove all
> of the old clock code.
>
> The final three patches add device tree clock support to the one SoC that
> supports it.
>
> v6 changes (also see individual patches for details):
> - All of the device tree bindings are changed
> - All of the clock drivers are changed significantly
> - Fixed issues brought up during review of v5
> - "ARM: davinci: move davinci_clk_init() to init_time" is removed from this
>   series and submitted separately
>
> v5 changes:
> - Basically, this is an entirely new series
> - Patches are broken up into bite-sized pieces
> - Converted PSC clock driver to use regmap
> - Restored "force" flag for certain DA850 clocks
> - Added device tree bindings
> - Moved more of the clock init to drivers/clk
> - Fixed frequency scaling (maybe*)
>
> * I have frequency scaling using cpufreq-dt, so I know the clocks are doing
>   what they need to do to make this work, but I haven't figured out how to
>   test davinci-cpufreq driver yet. (Patches to make cpufreq-dt work will be
>   sent separately after this series has landed.)
>

This driver doesn't have DT support - I suppose it would be useful to
add it and also add the corresponding DT node to da850.dtsi. If you're
ok with it, I can start working on it. I also have a patch for the i2c
cpufreq issue and it would be nice to test it with it.

Thanks,
Bartosz