linux-kernel - Re: [PATCH 1/2] dt-bindings: phy: Add Freescale i.MX8qm Mixel LVDS PHY binding

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Date:   Mon, 20 Jun 2022 20:08:30 +0800
From:   Liu Ying <victor.liu@....com>
To:     Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>,
        linux-phy@...ts.infradead.org, devicetree@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Cc:     kishon@...com, vkoul@...nel.org, robh+dt@...nel.org,
        krzysztof.kozlowski+dt@...aro.org, shawnguo@...nel.org,
        s.hauer@...gutronix.de, kernel@...gutronix.de, festevam@...il.com,
        linux-imx@....com
Subject: Re: [PATCH 1/2] dt-bindings: phy: Add Freescale i.MX8qm Mixel LVDS
 PHY binding

On Mon, 2022-06-20 at 12:38 +0200, Krzysztof Kozlowski wrote:
> On 20/06/2022 09:56, Liu Ying wrote:
> > On Mon, 2022-06-20 at 09:35 +0200, Krzysztof Kozlowski wrote:
> > > On 20/06/2022 05:06, Liu Ying wrote:
> > > > On Sun, 2022-06-19 at 14:11 +0200, Krzysztof Kozlowski wrote:
> > > > > On 18/06/2022 11:22, Liu Ying wrote:
> > > > > > This patch adds bindings for Mixel LVDS PHY found on
> > > > > > Freescale i.MX8qm SoC.
> > > > > > 
> > > > > > Signed-off-by: Liu Ying <victor.liu@....com>
> > > > > > ---
> > > > > >  .../bindings/phy/mixel,lvds-phy.yaml          | 64
> > > > > > +++++++++++++++++++
> > > > > >  1 file changed, 64 insertions(+)
> > > > > >  create mode 100644
> > > > > > Documentation/devicetree/bindings/phy/mixel,lvds-phy.yaml
> > > > > > diff --git
> > > > > > a/Documentation/devicetree/bindings/phy/mixel,lvds-
> > > > > > phy.yaml
> > > > > > b/Documentation/devicetree/bindings/phy/mixel,lvds-
> > > > > > phy.yaml
> > > > > > new file mode 100644
> > > > > > index 000000000000..de964ffb9356
> > > > > > --- /dev/null
> > > > > > +++ b/Documentation/devicetree/bindings/phy/mixel,lvds-
> > > > > > phy.yaml
> > > > > > @@ -0,0 +1,64 @@
> > > > > > +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> > > > > > +%YAML 1.2
> > > > > > +---
> > > > > > +$id: 
> > > > > > 
> > 
> > 
https://eur01.safelinks.protection.outlook.com/?url=http%3A%2F%2Fdevicetree.org%2Fschemas%2Fphy%2Fmixel%2Clvds-phy.yaml%23&amp;data=05%7C01%7Cvictor.liu%40nxp.com%7C968d5a1e2f5c4ccdd77908da52a9148d%7C686ea1d3bc2b4c6fa92cd99c5c301635%7C0%7C1%7C637913183390683087%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&amp;sdata=h8JmjvGBnTcMn2Uk3CVgq%2BB4%2BlbCBA5iDD7OhtFZyZo%3D&amp;reserved=0
> > > > > > +$schema: 
> > > > > > 
> > 
> > 
https://eur01.safelinks.protection.outlook.com/?url=http%3A%2F%2Fdevicetree.org%2Fmeta-schemas%2Fcore.yaml%23&amp;data=05%7C01%7Cvictor.liu%40nxp.com%7C968d5a1e2f5c4ccdd77908da52a9148d%7C686ea1d3bc2b4c6fa92cd99c5c301635%7C0%7C1%7C637913183390683087%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&amp;sdata=bLsmtGPC8tzZSHPqblHOhx0gnsgFHlKVu0P8dN6G15s%3D&amp;reserved=0
> > > > > > +
> > > > > > +title: Mixel LVDS PHY for Freescale i.MX8qm SoC
> > > > > 
> > > > > If Mixel is a vendor, it needs it's vendor prefix documented
> > > > > and
> > > > > used
> > > > > in
> > > > > compatible. Filename should match compatible. If it is not a
> > > > > vendor,
> > > > > then filename should be "fsl,imx8qm-lvds-phy.yaml"
> > > > 
> > > > Mixel is a vendor. I'll document the vendor prefix and set
> > > > 'fsl,imx8qm-lvds-phy' and 'mixel,lvds-phy' as compatible's
> > > > enum.
> > > > I'll keep the filename as-is.
> > > 
> > > mixel,lvds-phy is not a good compatible (and filename) because it
> > > is
> > > not
> > > specific about component version. Please use specific compatibles
> > > only
> > > thus also specific filename (filename should match first
> > > compatible).
> > 
> > All the information about component version I can find in the PHY
> > IP's
> > data sheet is '28FDSOI-LVDS-1250-8CH-TX-PLL'. '28FDSOI' looks like
> > the
> > technology name. Do you think the compatible name can be
> > 'mixel,lvds-1250-8ch-tx-pll'? Or, any better option?
> > 
> > If the compatible name is ok, does the below compabitle property
> > look
> > ok?
> > 
> > ===================8<==============
> >   compatible:
> >     enum:
> >       - mixel,lvds-1250-8ch-tx-pll
> >       - fsl,imx8qm-lvds-phy
> > ===================8<==============
> 
> 
https://eur01.safelinks.protection.outlook.com/?url=https%3A%2F%2Fmixel.com%2Fwp-content%2Fmixel%2Fpdf%2F2018%2FMXL-LVDS-1250-8CH-TX-PLL_SS_28FDSOI.pdf&amp;data=05%7C01%7Cvictor.liu%40nxp.com%7C968d5a1e2f5c4ccdd77908da52a9148d%7C686ea1d3bc2b4c6fa92cd99c5c301635%7C0%7C1%7C637913183390683087%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&amp;sdata=PWK82Pf%2FbBti6PXNq9wvFbjM6QmnZWcj7bWSh2FYAzA%3D&amp;reserved=0
> 
> mentions entire name as a device name, so with 28FDSOI, but your
> choice
> is also good.

Will use the entire name with 28FDSOI.

Thanks,
Liu Ying