linux-kernel - Re: [PATCH v2 0/8] omap*: Fixes/Cleanups for MMC devicetree node

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Message-ID: <CAPDyKFpBXbuzb0AELP74UFH2LmWZHXHkr5AAzcCCWMwJ8YUaGw@mail.gmail.com>
Date:   Fri, 9 Jun 2017 12:41:03 +0200
From:   Ulf Hansson <ulf.hansson@...aro.org>
To:     Kishon Vijay Abraham I <kishon@...com>
Cc:     Tony Lindgren <tony@...mide.com>, Rob Herring <robh+dt@...nel.org>,
        Sekhar Nori <nsekhar@...com>,
        Russell King <linux@...linux.org.uk>,
        linux-omap <linux-omap@...r.kernel.org>,
        "devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
        "linux-arm-kernel@...ts.infradead.org" 
        <linux-arm-kernel@...ts.infradead.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "linux-mmc@...r.kernel.org" <linux-mmc@...r.kernel.org>
Subject: Re: [PATCH v2 0/8] omap*: Fixes/Cleanups for MMC devicetree node

On 9 June 2017 at 10:05, Kishon Vijay Abraham I <kishon@...com> wrote:
> Hi,
>
> On Thursday 08 June 2017 12:50 PM, Ulf Hansson wrote:
>> On 7 June 2017 at 11:37, Kishon Vijay Abraham I <kishon@...com> wrote:
>>> There are the set of fixes that were sent initially as part
>>> of [1].
>>>
>>> These are mostly fixes w.r.t populating regulators in
>>> mmc dt node. It was working before because the regulators
>>> connecting to the IO lines are always on regulators. This will
>>> break once we add UHS support where voltage has to be changed
>>> dynamically.
>>>
>>> It also includes a patch to replace all vmmc_aux-supply
>>> with vqmmc-supply (In omap3-overo-base.dtsi remove the existing
>>> vqmmc-supply and then replace vmmc_aux-supply with vqmmc-supply).
>>> This will break old dt compatibility but not sure how better
>>> to handle this.
>>>
>>> Performed enumeration testing on dra72-evm-revc, dra72-evm,
>>> dra7-evm, am572x-evm, am571x-idk, am572x-idk, omap5-evm,
>>> pandaboard-es, am43xx-evm, am335x-evm, beagleboard etc.,
>>>
>>> This is a preparation series for adding UHS mode support in
>>> the above mentioned platforms.
>>>
>>> Changes from v1:
>>> *) Included a patch to replace deprecated "vmmc_aux" with
>>>    "vqmmc"
>>>
>>> [1] -> https://lkml.org/lkml/2017/5/19/196
>>>
>>> Kishon Vijay Abraham I (6):
>>>   ARM: dts: dra72-evm-common: Correct vmmc-supply for mmc2
>>>   ARM: dts: dra72-evm: Add vqmmc supply to mmc1
>>>   ARM: dts: dra72-evm-revc: Add vqmmc supply to mmc1
>>>   ARM: dts: am57xx-beagle-x15-revb1: Fix supply name used for MMC1 IO
>>>     lines
>>>   ARM: dts: dra7: Add "max-frequency" property to MMC dt nodes
>>>   ARM: dts: omap*: Replace deprecated "vmmc_aux" with "vqmmc"
>>>
>>> Ravikumar Kattekola (1):
>>>   ARM: dts: dra7-evm: Correct the vmmc-supply for mmc2
>>>
>>> Sekhar Nori (1):
>>>   ARM: OMAP2+: Add pdata-quirks for MMC/SD on DRA74x EVM
>>>
>>>  arch/arm/boot/dts/am572x-idk.dts               |  2 +-
>>>  arch/arm/boot/dts/am57xx-beagle-x15-revb1.dts  |  2 +-
>>>  arch/arm/boot/dts/dra7-evm.dts                 | 12 ++++++++--
>>>  arch/arm/boot/dts/dra7.dtsi                    |  5 +++++
>>>  arch/arm/boot/dts/dra71-evm.dts                | 16 ++++++++++++-
>>>  arch/arm/boot/dts/dra72-evm-common.dtsi        |  2 --
>>>  arch/arm/boot/dts/dra72-evm-revc.dts           | 18 +++++++++++++++
>>>  arch/arm/boot/dts/dra72-evm-tps65917.dtsi      |  2 +-
>>>  arch/arm/boot/dts/dra72-evm.dts                | 18 +++++++++++++++
>>>  arch/arm/boot/dts/omap3-beagle-xm.dts          |  2 +-
>>>  arch/arm/boot/dts/omap3-beagle.dts             |  2 +-
>>>  arch/arm/boot/dts/omap3-cm-t3517.dts           |  2 +-
>>>  arch/arm/boot/dts/omap3-cm-t3730.dts           |  2 +-
>>>  arch/arm/boot/dts/omap3-devkit8000-common.dtsi |  2 +-
>>>  arch/arm/boot/dts/omap3-evm-common.dtsi        |  2 +-
>>>  arch/arm/boot/dts/omap3-n900.dts               |  2 +-
>>>  arch/arm/boot/dts/omap3-overo-base.dtsi        |  3 +--
>>>  arch/arm/boot/dts/omap3-tao3530.dtsi           |  2 +-
>>>  arch/arm/boot/dts/omap3-zoom3.dts              |  2 +-
>>>  arch/arm/boot/dts/omap3430-sdp.dts             |  2 +-
>>>  arch/arm/mach-omap2/pdata-quirks.c             | 31 ++++++++++++++++++++++++++
>>>  include/linux/platform_data/hsmmc-omap.h       |  3 +++
>>>  22 files changed, 114 insertions(+), 20 deletions(-)
>>>
>>> --
>>> 2.11.0
>>>
>>
>> If it helps, I can host a branch with the updates on the omap_hsmmc
>> driver, such it can be pulled in from arm soc?
>>
>> I guess you need that as, the DT changes relies on the new vqmmc
>> binding. Or you thing it doesn't matter, because for the current
>> changes that regulator is always an always on regulator?
>
> Since there is fallback mechanism in omap_hsmmc driver (falls back to
> vmmc_aux), dt changes shouldn't rely on the omap_hsmmc driver.

Ahh, I get it.

So no immutable branch needed, although only the DTS changes is need
for me below.

>
> However I'll send a fix for omap3-overo-base which used vqmmc incorrectly (that
> should be merged before omap_hsmmc driver changes) so that git bisect does not
> break.

Great! Thanks for sorting this out!

>
> Thanks
> Kishon

Kind regards
Uffe