diff mbox series

[v3,2/6] dt-binding: phy: Add iMX8MP PCIe PHY binding

Message ID 1660806153-29001-3-git-send-email-hongxing.zhu@nxp.com
State Superseded
Headers show
Series Add the iMX8MP PCIe support | expand

Commit Message

Hongxing Zhu Aug. 18, 2022, 7:02 a.m. UTC 
Add i.MX8MP PCIe PHY binding.

Signed-off-by: Richard Zhu <hongxing.zhu@nxp.com>
---
 .../bindings/phy/fsl,imx8-pcie-phy.yaml          | 16 +++++++++++++---
 1 file changed, 13 insertions(+), 3 deletions(-)

Comments

Rob Herring (Arm) Aug. 22, 2022, 6:07 p.m. UTC | #1 
On Thu, Aug 18, 2022 at 03:02:29PM +0800, Richard Zhu wrote:
> Add i.MX8MP PCIe PHY binding.

Explain the differences in h/w. The phy is connected to PERST#?

> 
> Signed-off-by: Richard Zhu <hongxing.zhu@nxp.com>
> ---
>  .../bindings/phy/fsl,imx8-pcie-phy.yaml          | 16 +++++++++++++---
>  1 file changed, 13 insertions(+), 3 deletions(-)
> 
> diff --git a/Documentation/devicetree/bindings/phy/fsl,imx8-pcie-phy.yaml b/Documentation/devicetree/bindings/phy/fsl,imx8-pcie-phy.yaml
> index b6421eedece3..692783c7fd69 100644
> --- a/Documentation/devicetree/bindings/phy/fsl,imx8-pcie-phy.yaml
> +++ b/Documentation/devicetree/bindings/phy/fsl,imx8-pcie-phy.yaml
> @@ -16,6 +16,7 @@ properties:
>    compatible:
>      enum:
>        - fsl,imx8mm-pcie-phy
> +      - fsl,imx8mp-pcie-phy
>  
>    reg:
>      maxItems: 1
> @@ -28,11 +29,16 @@ properties:
>        - const: ref
>  
>    resets:
> -    maxItems: 1
> +    minItems: 1
> +    maxItems: 2
>  
>    reset-names:
> -    items:
> -      - const: pciephy
> +    oneOf:
> +      - items:          # for iMX8MM
> +          - const: pciephy
> +      - items:          # for IMX8MP
> +          - const: pciephy
> +          - const: perst

This does the same thing:

minItems: 1
items:
  - const: pciephy
  - const: perst


>  
>    fsl,refclk-pad-mode:
>      description: |
> @@ -60,6 +66,10 @@ properties:
>      description: A boolean property indicating the CLKREQ# signal is
>        not supported in the board design (optional)
>  
> +  power-domains:
> +    description: PCIe PHY  power domain (optional).
> +    maxItems: 1
> +
>  required:
>    - "#phy-cells"
>    - compatible
> -- 
> 2.25.1
> 
>
Hongxing Zhu Aug. 23, 2022, 2:11 a.m. UTC | #2 
> -----Original Message-----
> From: Rob Herring <robh@kernel.org>
> Sent: 2022年8月23日 2:07
> To: Hongxing Zhu <hongxing.zhu@nxp.com>
> Cc: p.zabel@pengutronix.de; l.stach@pengutronix.de; bhelgaas@google.com;
> lorenzo.pieralisi@arm.com; shawnguo@kernel.org; vkoul@kernel.org;
> alexander.stein@ew.tq-group.com; marex@denx.de;
> linux-phy@lists.infradead.org; devicetree@vger.kernel.org;
> linux-pci@vger.kernel.org; linux-arm-kernel@lists.infradead.org;
> linux-kernel@vger.kernel.org; kernel@pengutronix.de; dl-linux-imx
> <linux-imx@nxp.com>
> Subject: Re: [PATCH v3 2/6] dt-binding: phy: Add iMX8MP PCIe PHY binding
> 
> On Thu, Aug 18, 2022 at 03:02:29PM +0800, Richard Zhu wrote:
> > Add i.MX8MP PCIe PHY binding.
> 
> Explain the differences in h/w. The phy is connected to PERST#?
> 
Hi Rob:
Thanks for your review comments.
Yes, it is. PERST# impacts PCIe PHY too.
The default value of this bit is 1b'1 on i.MX8MQ/i.MX8MM platforms. 
But i.MX8MP has one inversed default value 1b'0 of PERST bit.
The PERST bit should be kept 1b'1 after power and clocks are stable.
So add the PHY PERST explicitly for i.MX8MP PCIe PHY.

> >
> > Signed-off-by: Richard Zhu <hongxing.zhu@nxp.com>
> > ---
> >  .../bindings/phy/fsl,imx8-pcie-phy.yaml          | 16 +++++++++++++---
> >  1 file changed, 13 insertions(+), 3 deletions(-)
> >
> > diff --git a/Documentation/devicetree/bindings/phy/fsl,imx8-pcie-phy.yaml
> b/Documentation/devicetree/bindings/phy/fsl,imx8-pcie-phy.yaml
> > index b6421eedece3..692783c7fd69 100644
> > --- a/Documentation/devicetree/bindings/phy/fsl,imx8-pcie-phy.yaml
> > +++ b/Documentation/devicetree/bindings/phy/fsl,imx8-pcie-phy.yaml
> > @@ -16,6 +16,7 @@ properties:
> >    compatible:
> >      enum:
> >        - fsl,imx8mm-pcie-phy
> > +      - fsl,imx8mp-pcie-phy
> >
> >    reg:
> >      maxItems: 1
> > @@ -28,11 +29,16 @@ properties:
> >        - const: ref
> >
> >    resets:
> > -    maxItems: 1
> > +    minItems: 1
> > +    maxItems: 2
> >
> >    reset-names:
> > -    items:
> > -      - const: pciephy
> > +    oneOf:
> > +      - items:          # for iMX8MM
> > +          - const: pciephy
> > +      - items:          # for IMX8MP
> > +          - const: pciephy
> > +          - const: perst
> 
> This does the same thing:
> 
> minItems: 1
> items:
>   - const: pciephy
>   - const: perst
> 
Okay, thanks.

Best Regards
Richard Zhu
> 
> >
> >    fsl,refclk-pad-mode:
> >      description: |
> > @@ -60,6 +66,10 @@ properties:
> >      description: A boolean property indicating the CLKREQ# signal is
> >        not supported in the board design (optional)
> >
> > +  power-domains:
> > +    description: PCIe PHY  power domain (optional).
> > +    maxItems: 1
> > +
> >  required:
> >    - "#phy-cells"
> >    - compatible
> > --
> > 2.25.1
> >
> >
Hongxing Zhu Aug. 24, 2022, 9:15 a.m. UTC | #3 
> -----Original Message-----
> From: Hongxing Zhu
> Sent: 2022年8月23日 10:12
> To: Rob Herring <robh@kernel.org>
> Cc: p.zabel@pengutronix.de; l.stach@pengutronix.de; bhelgaas@google.com;
> lorenzo.pieralisi@arm.com; shawnguo@kernel.org; vkoul@kernel.org;
> alexander.stein@ew.tq-group.com; marex@denx.de;
> linux-phy@lists.infradead.org; devicetree@vger.kernel.org;
> linux-pci@vger.kernel.org; linux-arm-kernel@lists.infradead.org;
> linux-kernel@vger.kernel.org; kernel@pengutronix.de; dl-linux-imx
> <linux-imx@nxp.com>
> Subject: RE: [PATCH v3 2/6] dt-binding: phy: Add iMX8MP PCIe PHY binding
> 
> > -----Original Message-----
> > From: Rob Herring <robh@kernel.org>
> > Sent: 2022年8月23日 2:07
> > To: Hongxing Zhu <hongxing.zhu@nxp.com>
> > Cc: p.zabel@pengutronix.de; l.stach@pengutronix.de;
> > bhelgaas@google.com; lorenzo.pieralisi@arm.com; shawnguo@kernel.org;
> > vkoul@kernel.org; alexander.stein@ew.tq-group.com; marex@denx.de;
> > linux-phy@lists.infradead.org; devicetree@vger.kernel.org;
> > linux-pci@vger.kernel.org; linux-arm-kernel@lists.infradead.org;
> > linux-kernel@vger.kernel.org; kernel@pengutronix.de; dl-linux-imx
> > <linux-imx@nxp.com>
> > Subject: Re: [PATCH v3 2/6] dt-binding: phy: Add iMX8MP PCIe PHY
> > binding
> >
> > On Thu, Aug 18, 2022 at 03:02:29PM +0800, Richard Zhu wrote:
> > > Add i.MX8MP PCIe PHY binding.
> >
> > Explain the differences in h/w. The phy is connected to PERST#?
> >
> Hi Rob:
> Thanks for your review comments.
> Yes, it is. PERST# impacts PCIe PHY too.
> The default value of this bit is 1b'1 on i.MX8MQ/i.MX8MM platforms.
> But i.MX8MP has one inversed default value 1b'0 of PERST bit.
> The PERST bit should be kept 1b'1 after power and clocks are stable.
> So add the PHY PERST explicitly for i.MX8MP PCIe PHY.
> 
> > >
> > > Signed-off-by: Richard Zhu <hongxing.zhu@nxp.com>
> > > ---
> > >  .../bindings/phy/fsl,imx8-pcie-phy.yaml          | 16
> +++++++++++++---
> > >  1 file changed, 13 insertions(+), 3 deletions(-)
> > >
> > > diff --git
> > > a/Documentation/devicetree/bindings/phy/fsl,imx8-pcie-phy.yaml
> > b/Documentation/devicetree/bindings/phy/fsl,imx8-pcie-phy.yaml
> > > index b6421eedece3..692783c7fd69 100644
> > > --- a/Documentation/devicetree/bindings/phy/fsl,imx8-pcie-phy.yaml
> > > +++ b/Documentation/devicetree/bindings/phy/fsl,imx8-pcie-phy.yaml
> > > @@ -16,6 +16,7 @@ properties:
> > >    compatible:
> > >      enum:
> > >        - fsl,imx8mm-pcie-phy
> > > +      - fsl,imx8mp-pcie-phy
> > >
> > >    reg:
> > >      maxItems: 1
> > > @@ -28,11 +29,16 @@ properties:
> > >        - const: ref
> > >
> > >    resets:
> > > -    maxItems: 1
> > > +    minItems: 1
> > > +    maxItems: 2
> > >
> > >    reset-names:
> > > -    items:
> > > -      - const: pciephy
> > > +    oneOf:
> > > +      - items:          # for iMX8MM
> > > +          - const: pciephy
> > > +      - items:          # for IMX8MP
> > > +          - const: pciephy
> > > +          - const: perst
> >
> > This does the same thing:
> >
> > minItems: 1
> > items:
> >   - const: pciephy
> >   - const: perst
> >
> Okay, thanks.
> 
Hi Rob:
Do you mean the following definition of reset?
...
  resets:
    minItems: 1

  reset-names:
    minItems: 1
      - const: pciephy
      - const: perst
...
When do the dtbs_check later, it complains like below.
"
CHECK   arch/arm64/boot/dts/freescale/imx8mn-venice-gw7902.dtb
  DTC     arch/arm64/boot/dts/freescale/imx8mp-dhcom-pdk2.dtb
  CHECK   arch/arm64/boot/dts/freescale/imx8mp-dhcom-pdk2.dtb
/home/richard/work/linux-imx/arch/arm64/boot/dts/freescale/imx8mp-dhcom-pdk2.dtb: pcie-phy@32f00000: resets: [[83, 24], [83, 25]] is too long
	From schema: /home/richard/work/linux-imx/Documentation/devicetree/bindings/phy/fsl,imx8-pcie-phy.yaml
  DTC     arch/arm64/boot/dts/freescale/imx8mp-evk.dtb
  CHECK   arch/arm64/boot/dts/freescale/imx8mp-evk.dtb
/home/richard/work/linux-imx/arch/arm64/boot/dts/freescale/imx8mp-evk.dtb: pcie-phy@32f00000: resets: [[61, 24], [61, 25]] is too long
	From schema: /home/richard/work/linux-imx/Documentation/devicetree/bindings/phy/fsl,imx8-pcie-phy.yaml
"

Best Regards
Richard Zhu

> Best Regards
> Richard Zhu
> >
> > >
> > >    fsl,refclk-pad-mode:
> > >      description: |
> > > @@ -60,6 +66,10 @@ properties:
> > >      description: A boolean property indicating the CLKREQ# signal is
> > >        not supported in the board design (optional)
> > >
> > > +  power-domains:
> > > +    description: PCIe PHY  power domain (optional).
> > > +    maxItems: 1
> > > +
> > >  required:
> > >    - "#phy-cells"
> > >    - compatible
> > > --
> > > 2.25.1
> > >
> > >
diff mbox series

Patch

diff --git a/Documentation/devicetree/bindings/phy/fsl,imx8-pcie-phy.yaml b/Documentation/devicetree/bindings/phy/fsl,imx8-pcie-phy.yaml
index b6421eedece3..692783c7fd69 100644
--- a/Documentation/devicetree/bindings/phy/fsl,imx8-pcie-phy.yaml
+++ b/Documentation/devicetree/bindings/phy/fsl,imx8-pcie-phy.yaml
@@ -16,6 +16,7 @@  properties:
   compatible:
     enum:
       - fsl,imx8mm-pcie-phy
+      - fsl,imx8mp-pcie-phy
 
   reg:
     maxItems: 1
@@ -28,11 +29,16 @@  properties:
       - const: ref
 
   resets:
-    maxItems: 1
+    minItems: 1
+    maxItems: 2
 
   reset-names:
-    items:
-      - const: pciephy
+    oneOf:
+      - items:          # for iMX8MM
+          - const: pciephy
+      - items:          # for IMX8MP
+          - const: pciephy
+          - const: perst
 
   fsl,refclk-pad-mode:
     description: |
@@ -60,6 +66,10 @@  properties:
     description: A boolean property indicating the CLKREQ# signal is
       not supported in the board design (optional)
 
+  power-domains:
+    description: PCIe PHY  power domain (optional).
+    maxItems: 1
+
 required:
   - "#phy-cells"
   - compatible