linux-kernel - Re: [PATCH v4 0/8] ARM: davinci: complete the conversion to using the reset framework

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Date:   Fri, 23 Mar 2018 19:30:31 -0500
From:   Suman Anna <s-anna@...com>
To:     Bartosz Golaszewski <brgl@...ev.pl>,
        Stephen Boyd <sboyd@...nel.org>,
        Bjorn Andersson <bjorn.andersson@...aro.org>,
        Ohad Ben-Cohen <ohad@...ery.com>
CC:     David Lechner <david@...hnology.com>,
        Kevin Hilman <khilman@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Michael Turquette <mturquette@...libre.com>,
        Philipp Zabel <p.zabel@...gutronix.de>,
        Rob Herring <robh+dt@...nel.org>,
        Russell King <linux@...linux.org.uk>,
        Sekhar Nori <nsekhar@...com>,
        devicetree <devicetree@...r.kernel.org>,
        <linux-remoteproc@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Bartosz Golaszewski <bgolaszewski@...libre.com>,
        <linux-clk@...r.kernel.org>,
        Linux ARM <linux-arm-kernel@...ts.infradead.org>
Subject: Re: [PATCH v4 0/8] ARM: davinci: complete the conversion to using the
 reset framework

Hi Bart,

On 03/23/2018 12:16 PM, Bartosz Golaszewski wrote:
> 2018-03-23 18:08 GMT+01:00 Stephen Boyd <sboyd@...nel.org>:
>> Quoting Bartosz Golaszewski (2018-03-23 09:55:47)
>>> 2018-03-23 17:49 GMT+01:00 Stephen Boyd <sboyd@...nel.org>:
>>>> Quoting Bartosz Golaszewski (2018-03-23 06:04:47)
>>>>> From: Bartosz Golaszewski <bgolaszewski@...libre.com>
>>>>>
>>>>> This series converts the only user of the handcoded, mach-specific reset
>>>>> routines in the davinci platform to using the reset framework.
>>>>>
>>>>> Patch 1 modifies the way lookup entries are registered with the reset
>>>>> framework.
>>>>>
>>>>> Patches 2-4 add necessary lookups/DT-properties.
>>>>>
>>>>> Patches 5-7 convert the davinci-rproc driver to the reset framework.
>>>>>
>>>>> Patch 8 removes now dead code.
>>>>>
>>>>> Philipp: it turned out that it's indeed better to use the reset
>>>>> controller's device name for the entry lookup.
>>>>>
>>>>> Tested both in DT and legacy modes by booting the examples from
>>>>> ti-ipc-rtos recipe in meta-ti.
>>>>>
>>>>> This series applies on top of David Lechner's common-clk-v9 branch[1]
>>>>> with Philipp Zabel's reset/next branch[2] pulled in.
>>>>>
>>>>> It can be found in my github tree as well[3].
>>>>>
>>>>
>>>> What's the merge strategy for the rest of the patches? I should apply
>>>> the clk ones after the next -rc1?
>>>
>>> Or maybe Philipp can provide us with an immutable branch with the reset patches?
>>>
>>> The you could apply the driver patches and let Sekhar take all the
>>> platform code?
>>>
>>
>> Ok that could work too.
> 
> Ohad, Bjorn can you ack the remoteproc patches? Are you OK with
> Stephen taking them through the clock tree? Otherwise it would get
> complicated since they depend on the first clk patch and the last clk
> patch depends on them.

I will take a closer look and test on Mon. A quick glance of the
remoteproc changes seem to be fine. I will let Bjorn comment on the
patch flow.

The only reason I had to use the clock in the driver was for the reset
before, and hopefully this will allow me to actually switch to using
pm_runtime API like I do with the rest of the TI remoteproc drivers
(Keystone remoteproc driver also uses PSC for clock and reset but then
it goes through different set of drivers).

So, I see a mix of driver and dts patches in the series, are all the dts
patches coming through Sekhar?

regards
Suman

> 
> Thanks,
> Bart
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