Date:   Sat, 15 Dec 2018 10:04:55 +0000
From:   Schrempf Frieder <frieder.schrempf@...tron.de>
To:     Shawn Guo <shawnguo@...nel.org>
CC:     Pengutronix Kernel Team <kernel@...gutronix.de>,
        Fabio Estevam <fabio.estevam@....com>,
        NXP Linux Team <linux-imx@....com>,
        "linux-arm-kernel@...ts.infradead.org" 
        <linux-arm-kernel@...ts.infradead.org>,
        "devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
        Sascha Hauer <s.hauer@...gutronix.de>,
        "boris.brezillon@...tlin.com" <boris.brezillon@...tlin.com>,
        "broonie@...nel.org" <broonie@...nel.org>,
        "linux-mtd@...ts.infradead.org" <linux-mtd@...ts.infradead.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "linux-spi@...r.kernel.org" <linux-spi@...r.kernel.org>
Subject: AW: [PATCH 0/5] Prepare devicetrees for the new FSL QSPI driver

>On Thu, Dec 13, 2018 at 09:45:04AM +0000, Schrempf Frieder wrote:
>> + Shawn, Sascha
>>
>> On 10.12.18 17:31, Schrempf Frieder wrote:
>> > Hi FSL/ARM maintainers,
>> >
>> > On 10.12.18 17:26, Schrempf Frieder wrote:
>> >> From: Frieder Schrempf <frieder.schrempf@...tron.de>
>> >>
>> >> We have prepared a new driver for the FSL QSPI controller that works under
>> >> the SPI framework. The current devicetrees are broken because they use an
>> >> inconsistent scheme for assigning the reg properties.
>> >>
>> >> As, in contrast to the current driver, the new driver will use the reg
>> >> properties to select the correct chip, we need to fix them.
>> >>
>> >> We also add spi-[tx/rx]-bus-width to make sure the full buswidth will be used
>> >> and while at it clean up and remove some unused properties.
>> >
>> > could you please consider these devicetree patches for v4.21?
>>
>> Any chance to get this merged? Otherwise we would need to postpone the
>> new driver even further.
>
>As it came up a little bit late (the same day I sent pull request for
>4.21), I was considering it as 4.22 material.  But as you mentioned that
>the series is non-intrusive, I can try to send it to arm-soc folk for
>4.21 merge window, and then that will be their call.  But before I do
>it, I need you to double confirm that the series will not break anything
>that is already working.

I can confirm, that the series does only remove or add properties to the
devicetree, that are currently not used by the driver. Therefore it won't break
anything.

Thanks,
Frieder

>
>Shawn
>
>>
>> All the changes to the devicetrees in this series are non-intrusive and
>> uncritical, anyway.
>>
>> Thanks,
>> Frieder
>>
>> >
>> > We have the new FSL QSPI driver under the SPI framework ([1]) ready, but
>> > we need some small fixes to the devicetrees that are currently broken.
>> >
>> > As the new driver depends on these changes (mainly the change to the reg
>> > properties) and it is not possible to add compatibility for the old
>> > bindings, it would be really nice to have them in v4.21, so we can queue
>> > the driver for v4.22 or whatever the next release will be called.
>> >
>> > Please also see [2] for some more explanation.
>> >
>> > Thanks,
>> > Frieder
>> >
>> > [1] https://patchwork.ozlabs.org/cover/1007641/
>> > [2] https://patchwork.ozlabs.org/patch/922817/#1925445
>> >
>> >>
>> >> Frieder Schrempf (5):
>> >>     arm64: dts: Remove unused properties from FSL QSPI driver nodes
>> >>     ARM: dts: Remove unused properties from FSL QSPI driver nodes
>> >>     ARM: dts: imx6sx-sdb: Fix the reg properties for the FSL QSPI nodes
>> >>     arm64: dts: Add spi-[tx/rx]-bus-width for the FSL QSPI controller
>> >>     ARM: dts: Add spi-[tx/rx]-bus-width for the FSL QSPI controller
>> >>
>> >>    arch/arm/boot/dts/imx6sx-sdb-reva.dts              | 8 ++++++--
>> >>    arch/arm/boot/dts/imx6sx-sdb.dts                   | 8 ++++++--
>> >>    arch/arm/boot/dts/imx6ul-14x14-evk.dtsi            | 2 ++
>> >>    arch/arm/boot/dts/ls1021a-moxa-uc-8410a.dts        | 5 ++---
>> >>    arch/arm64/boot/dts/freescale/fsl-ls1043a-qds.dts  | 3 ++-
>> >>    arch/arm64/boot/dts/freescale/fsl-ls1046a-qds.dts  | 4 ++--
>> >>    arch/arm64/boot/dts/freescale/fsl-ls1046a-rdb.dts  | 6 ++++--
>> >>    arch/arm64/boot/dts/freescale/fsl-ls208xa-qds.dtsi | 4 ++++
>> >>    8 files changed, 28 insertions(+), 12 deletions(-)
>> >>
>> > ______________________________________________________
>> > Linux MTD discussion mailing list
>> > http://lists.infradead.org/mailman/listinfo/linux-mtd/
>> >

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