[v1,2/2] dt-bindings: usb: snps,dwc3: Add 'snps,fixed_dwc3_globals_regs_start' quirk

Add a new 'snps,fixed_dwc3_globals_regs_start' DT to dwc3 core to remap
the global register start address

The RTK DHC SoCs were designed the global register address offset at 0x8100.
The default address is at DWC3_GLOBALS_REGS_START (0xc100).
Therefore, add the property of device-tree to adjust this start address.

Signed-off-by: Stanley Chang <stanley_chang@realtek.com>
---
 Documentation/devicetree/bindings/usb/snps,dwc3.yaml | 7 +++++++
 1 file changed, 7 insertions(+)

On Fri, Apr 07, 2023, Stanley Chang wrote:
> Add a new 'snps,fixed_dwc3_globals_regs_start' DT to dwc3 core to remap
> the global register start address
> 
> The RTK DHC SoCs were designed the global register address offset at 0x8100.
> The default address is at DWC3_GLOBALS_REGS_START (0xc100).
> Therefore, add the property of device-tree to adjust this start address.
> 
> Signed-off-by: Stanley Chang <stanley_chang@realtek.com>
> ---
>  Documentation/devicetree/bindings/usb/snps,dwc3.yaml | 7 +++++++
>  1 file changed, 7 insertions(+)
> 
> diff --git a/Documentation/devicetree/bindings/usb/snps,dwc3.yaml b/Documentation/devicetree/bindings/usb/snps,dwc3.yaml
> index be36956af53b..a5599d977db6 100644
> --- a/Documentation/devicetree/bindings/usb/snps,dwc3.yaml
> +++ b/Documentation/devicetree/bindings/usb/snps,dwc3.yaml
> @@ -359,6 +359,13 @@ properties:
>      items:
>        enum: [1, 4, 8, 16, 32, 64, 128, 256]
>  
> +  snps,fixed_dwc3_globals_regs_start:
> +    description:
> +      value for remapping global register start address. For some dwc3
> +      controller, the dwc3 global register start address is not at
> +      default DWC3_GLOBALS_REGS_START (0xc100). This property is added to
> +      adjust the address.
> +
>    port:
>      $ref: /schemas/graph.yaml#/properties/port
>      description:
> -- 
> 2.34.1
> 

This isn't common. Can we check through compatible string instead?

Thanks,
Thinh

> > diff --git a/Documentation/devicetree/bindings/usb/snps,dwc3.yaml
> > b/Documentation/devicetree/bindings/usb/snps,dwc3.yaml
> > index be36956af53b..a5599d977db6 100644
> > --- a/Documentation/devicetree/bindings/usb/snps,dwc3.yaml
> > +++ b/Documentation/devicetree/bindings/usb/snps,dwc3.yaml
> > @@ -359,6 +359,13 @@ properties:
> >      items:
> >        enum: [1, 4, 8, 16, 32, 64, 128, 256]
> >
> > +  snps,fixed_dwc3_globals_regs_start:
> > +    description:
> > +      value for remapping global register start address. For some dwc3
> > +      controller, the dwc3 global register start address is not at
> > +      default DWC3_GLOBALS_REGS_START (0xc100). This property is
> added to
> > +      adjust the address.
> > +
> >    port:
> >      $ref: /schemas/graph.yaml#/properties/port
> >      description:
> > --
> > 2.34.1
> >
> 
> This isn't common. Can we check through compatible string instead?
> 
> Thanks,
> Thinh

I revise this string in next version.
Thanks,
Stanley