linux-kernel - Re: [PATCH v3 4/5] dt-bindings: usb/ti,am62-usb.yaml: Add PHY2 register space

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Date: Thu, 1 Feb 2024 18:18:05 +0000
From: Conor Dooley <conor@...nel.org>
To: Roger Quadros <rogerq@...nel.org>
Cc: nm@...com, vigneshr@...com, afd@...com, kristo@...nel.org,
	robh+dt@...nel.org, krzysztof.kozlowski+dt@...aro.org,
	conor+dt@...nel.org, srk@...com, r-gunasekaran@...com, b-liu@...com,
	linux-arm-kernel@...ts.infradead.org, devicetree@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH v3 4/5] dt-bindings: usb/ti,am62-usb.yaml: Add PHY2
 register space

On Thu, Feb 01, 2024 at 06:15:20PM +0000, Conor Dooley wrote:
> On Thu, Feb 01, 2024 at 02:03:31PM +0200, Roger Quadros wrote:
> > So far this was not required but due to the newly identified
> > Errata i2409 [1] we need to poke this register space.
> > 
> > [1] https://www.ti.com/lit/er/sprz487d/sprz487d.pdf
> > 
> > Signed-off-by: Roger Quadros <rogerq@...nel.org>
> 
> Acked-by: Conor Dooley <conor.dooley@...rochip.com>

Actually, where is the user for this that actually pokes the register
space?
You're adding another register region, so I went to check how you were
handling that in drivers, but there's no driver patch.


> 
> > ---
> > 
> > Notes:
> >     Changelog:
> >     
> >     v3 - new patch
> > 
> >  Documentation/devicetree/bindings/usb/ti,am62-usb.yaml | 7 +++++--
> >  1 file changed, 5 insertions(+), 2 deletions(-)
> > 
> > diff --git a/Documentation/devicetree/bindings/usb/ti,am62-usb.yaml b/Documentation/devicetree/bindings/usb/ti,am62-usb.yaml
> > index fec5651f5602..c02d9d467d9c 100644
> > --- a/Documentation/devicetree/bindings/usb/ti,am62-usb.yaml
> > +++ b/Documentation/devicetree/bindings/usb/ti,am62-usb.yaml
> > @@ -14,7 +14,9 @@ properties:
> >      const: ti,am62-usb
> >  
> >    reg:
> > -    maxItems: 1
> > +    items:
> > +      - description: USB CFG register space
> > +      - description: USB PHY2 register space
> >  
> >    ranges: true
> >  
> > @@ -82,7 +84,8 @@ examples:
> >  
> >        usbss1: usb@...0000 {
> >          compatible = "ti,am62-usb";
> > -        reg = <0x00 0x0f910000 0x00 0x800>;
> > +        reg = <0x00 0x0f910000 0x00 0x800>,
> > +              <0x00 0x0f918000 0x00 0x400>;
> 
> Why the double zeros btw?
> 
> Cheers,
> Conor.
> 
> >          clocks = <&k3_clks 162 3>;
> >          clock-names = "ref";
> >          ti,syscon-phy-pll-refclk = <&wkup_conf 0x4018>;
> > -- 
> > 2.34.1
> > 



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