linux-kernel - Re: [PATCH v2 3/6] mfd: dt: Add bindings for the Aspeed LPC Host Controller (LPCHC)

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Message-ID: <20161118184535.GE19884@dell.home>
Date:   Fri, 18 Nov 2016 18:45:35 +0000
From:   Lee Jones <lee.jones@...aro.org>
To:     Andrew Jeffery <andrew@...id.au>, arnd@...db.de
Cc:     Linus Walleij <linus.walleij@...aro.org>,
        Joel Stanley <joel@....id.au>,
        Mark Rutland <mark.rutland@....com>,
        Rob Herring <robh+dt@...nel.org>, linux-gpio@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        devicetree@...r.kernel.org
Subject: Re: [PATCH v2 3/6] mfd: dt: Add bindings for the Aspeed LPC Host
 Controller (LPCHC)

[Sending Arnd this time!]

> Arnd,
> 
> Do you have a preference?
> 
> > The Aspeed LPC Host Controller is presented as a syscon device to
> > arbitrate access by LPC and pinmux drivers. LPC pinmux configuration on
> > fifth generation SoCs depends on bits in both the System Control Unit
> > and the LPC Host Controller.
> > 
> > Signed-off-by: Andrew Jeffery <andrew@...id.au>
> > ---
> >  Documentation/devicetree/bindings/mfd/aspeed-lpchc.txt | 17 +++++++++++++++++
> 
> Create a new directory in bindings/mfd called 'syscon'.
> 
> Or perhaps 'bindings/syscon'.
> 
> >  1 file changed, 17 insertions(+)
> >  create mode 100644 Documentation/devicetree/bindings/mfd/aspeed-lpchc.txt
> > 
> > diff --git a/Documentation/devicetree/bindings/mfd/aspeed-lpchc.txt b/Documentation/devicetree/bindings/mfd/aspeed-lpchc.txt
> > new file mode 100644
> > index 000000000000..792651488c3d
> > --- /dev/null
> > +++ b/Documentation/devicetree/bindings/mfd/aspeed-lpchc.txt
> > @@ -0,0 +1,17 @@
> > +* Device tree bindings for the Aspeed LPC Host Controller (LPCHC)
> > +
> > +The LPCHC registers configure LPC behaviour between the BMC and the host
> > +system. The LPCHC also participates in pinmux requests on g5 SoCs and is
> > +therefore considered a syscon device.
> > +
> > +Required properties:
> > +- compatible:		"aspeed,ast2500-lpchc", "syscon"
> > +- reg:			contains offset/length value of the LPCHC memory
> > +			region.
> 
> Why not just use a single tab, then you don't have to linewrap?
> 
> > +Example:
> > +
> > +lpchc: lpchc@...890a0 {
> > +	compatible = "aspeed,ast2500-lpchc", "syscon";
> > +	reg = <0x1e7890a0 0xc4>;
> > +};
> 

-- 
Lee Jones
Linaro STMicroelectronics Landing Team Lead
Linaro.org │ Open source software for ARM SoCs
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