linux-kernel - Re: [PATCH 0/5] Prepare devicetrees for the new FSL QSPI driver

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Date:   Fri, 14 Dec 2018 08:42:57 +0800
From:   Shawn Guo <shawnguo@...nel.org>
To:     Schrempf Frieder <frieder.schrempf@...tron.de>
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: Re: [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.

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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