linux-kernel - Re: [PATCH v10 00/27] ARM: davinci: convert to common clock framework

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Date:   Sun, 13 May 2018 20:50:04 -0500
From:   David Lechner <david@...hnology.com>
To:     Adam Ford <aford173@...il.com>
Cc:     linux-clk@...r.kernel.org, devicetree <devicetree@...r.kernel.org>,
        arm-soc <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>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v10 00/27] ARM: davinci: convert to common clock framework

On 05/13/2018 07:40 PM, Adam Ford wrote:
> On Wed, May 9, 2018 at 12:25 PM, David Lechner <david@...hnology.com> wrote:
>> This series converts mach-davinci to use the common clock framework.
>>
>> The series works like this, the first 3 patches fix some issues with the clock
>> drivers that have already been accepted into the mainline kernel.
>>
>> Then, starting with "ARM: davinci: pass clock as parameter to
>> davinci_timer_init()", 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 four patches add device tree clock support to the one SoC that
>> supports it.
>>
>> This series has been tested on TI OMAP-L138 LCDK (both device tree and legacy
>> board file).
>>
> 
> I am not sure if I did something wrong, but I attempted to build and I
> wasn't able to boot the da850-evm.dtb your repo common-clk-v11,
> however the legacy board file boot was OK.
> 
> make davinci_all_defconfig ARCH=arm
> make zImage modules da850-evm.dtb ARCH=arm CROSS_COMPILE=arm-linux- -j8
> 
> 3140416 bytes read in 1464 ms (2 MiB/s)
> 20353 bytes read in 15 ms (1.3 MiB/s)
> ## Flattened Device Tree blob at c0600000
>     Booting using the fdt blob at 0xc0600000
>     Loading Device Tree to c7e57000, end c7e5ef80 ... OK
> 
> Starting kernel ...
> 
> Uncompressing Linux... done, booting the kernel.
> 
> (and hang)
> 
> If you have some suggestions, I am try them as I get time.
> 

As with each revision of this series, I have included debugging tips
in the cover letter, e.g. earlyprink and not disabling unused clocks.