linux-kernel - Re: [PATCH V2 1/5] dt-bindings: usb: xhci-tegra: Add power-domain details

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Message-ID: <20181011164952.GC7393@ulmo>
Date:   Thu, 11 Oct 2018 18:49:52 +0200
From:   Thierry Reding <thierry.reding@...il.com>
To:     Jon Hunter <jonathanh@...dia.com>
Cc:     Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Mathias Nyman <mathias.nyman@...el.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-tegra@...r.kernel.org, Ulf Hansson <ulf.hansson@...aro.org>
Subject: Re: [PATCH V2 1/5] dt-bindings: usb: xhci-tegra: Add power-domain
 details

On Fri, Sep 28, 2018 at 03:11:46PM +0100, Jon Hunter wrote:
> Add details for power-domains to the Tegra xHCI bindings so that
> generic power-domains can be used for inconjunction with the xHCI
> driver.
> 
> Signed-off-by: Jon Hunter <jonathanh@...dia.com>
> ---
>  Documentation/devicetree/bindings/usb/nvidia,tegra124-xusb.txt | 8 ++++++++
>  1 file changed, 8 insertions(+)
> 
> diff --git a/Documentation/devicetree/bindings/usb/nvidia,tegra124-xusb.txt b/Documentation/devicetree/bindings/usb/nvidia,tegra124-xusb.txt
> index 3eee9e505400..4156c3e181c5 100644
> --- a/Documentation/devicetree/bindings/usb/nvidia,tegra124-xusb.txt
> +++ b/Documentation/devicetree/bindings/usb/nvidia,tegra124-xusb.txt
> @@ -59,6 +59,14 @@ For Tegra210:
>  - avdd-pll-uerefe-supply: PLLE reference PLL power supply. Must supply 1.05 V.
>  - dvdd-pex-pll-supply: PCIe/USB3 PLL power supply. Must supply 1.05 V.
>  - hvdd-pex-pll-e-supply: High-voltage PLLE power supply. Must supply 1.8 V.
> +- power-domains: A list of PM domain specifiers that reference each power-domain
> +  used by the xHCI controller. This list must comprise of a specifier for the
> +  XUSBA and XUSBC power-domains. See ../power/power_domain.txt and
> +  ../arm/tegra/nvidia,tegra20-pmc.txt for details.
> +- power-domain-names: A list of names that represent each of the specifiers in
> +  the 'power-domains' property. Must include 'xusb_ss' and 'xusb_host' which

Total bike-shed comment: maybe call these "superspeed" and "host" or
something. The xusb_ prefix is kind of redundent because of the context.
On the other hand, those are the names by which the power partitions are
referred to, so either way:

Acked-by: Thierry Reding <treding@...dia.com>

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