linux-kernel - Re: [PATCH v10 8/8] dt-bindings: mmc: Add Cavium SOCs MMC bindings

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Message-ID: <20170109150517.GA2862@hardcore>
Date:   Mon, 9 Jan 2017 16:05:17 +0100
From:   Jan Glauber <jan.glauber@...iumnetworks.com>
To:     Rob Herring <robh@...nel.org>
CC:     Ulf Hansson <ulf.hansson@...aro.org>, <linux-mmc@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>,
        David Daney <ddaney@...iumnetworks.com>,
        "Steven J . Hill" <Steven.Hill@...ium.com>,
        Mark Rutland <mark.rutland@....com>,
        <devicetree@...r.kernel.org>
Subject: Re: [PATCH v10 8/8] dt-bindings: mmc: Add Cavium SOCs MMC bindings

On Thu, Dec 22, 2016 at 02:32:42PM -0600, Rob Herring wrote:
> On Mon, Dec 19, 2016 at 01:15:52PM +0100, Jan Glauber wrote:
> > Add description of Cavium Octeon and ThunderX SOC device tree bindings.
> > 
> > CC: Ulf Hansson <ulf.hansson@...aro.org>
> > CC: Rob Herring <robh+dt@...nel.org>
> > CC: Mark Rutland <mark.rutland@....com>
> > CC: devicetree@...r.kernel.org
> > 
> > Signed-off-by: Jan Glauber <jglauber@...ium.com>
> > ---
> >  .../devicetree/bindings/mmc/octeon-mmc.txt         | 59 ++++++++++++++++++++++
> 
> Perhaps cavium-mmc.txt would be more appropriate now.

Yes, forgot to rename it.

> >  1 file changed, 59 insertions(+)
> >  create mode 100644 Documentation/devicetree/bindings/mmc/octeon-mmc.txt
> > 
> > diff --git a/Documentation/devicetree/bindings/mmc/octeon-mmc.txt b/Documentation/devicetree/bindings/mmc/octeon-mmc.txt
> > new file mode 100644
> > index 0000000..aad02eb
> > --- /dev/null
> > +++ b/Documentation/devicetree/bindings/mmc/octeon-mmc.txt
> > @@ -0,0 +1,59 @@
> > +* Cavium Octeon & ThunderX MMC controller
> > +
> > +The highspeed MMC host controller on Caviums SoCs provides an interface
> > +for MMC and SD types of memory cards.
> > +
> > +Supported maximum speeds are the ones of the eMMC standard 4.41 as well
> > +as the speed of SD standard 4.0. Only 3.3 Volt is supported.
> > +
> > +Required properties:
> > + - compatible : should be one of:
> > +   * "cavium,octeon-6130-mmc"
> > +   * "cavium,octeon-6130-mmc-slot"
> > +   * "cavium,octeon-7890-mmc"
> > +   * "cavium,octeon-7890-mmc-slot"
> > +   * "cavium,thunder-8190-mmc"
> > +   * "cavium,thunder-8190-mmc-slot"
> > +   * "cavium,thunder-8390-mmc"
> > +   * "cavium,thunder-8390-mmc-slot"
> > + - reg : mmc controller base registers
> 
> Following PCI addressing?

Yes for the host controller, for the child nodes we use reg as the
physical slot number. Maybe I should describe the child node properties
separately?

> > + - clocks : phandle
> > +
> > +Optional properties:
> > + - for cd, bus-width and additional generic mmc parameters
> > +   please refer to mmc.txt within this directory
> > + - "cavium,cmd-clk-skew" : number of coprocessor clocks before sampling command
> > + - "cavium,dat-clk-skew" : number of coprocessor clocks before sampling data
> > +
> > +Deprecated properties:
> > +- spi-max-frequency : use max-frequency instead
> > +- "cavium,bus-max-width" : use bus-width instead
> 
> Drop the quotes.

OK, droped them also above.

> > +
> > +Examples:
> > +	- Within .dtsi:
> 
> Don't show the division between files in the example.

OK.

> > +	mmc_1_4: mmc@1,4 {
> > +		compatible = "cavium,thunder-8390-mmc";
> > +		reg = <0x0c00 0 0 0 0>;	/* DEVFN = 0x0c (1:4) */
> > +		#address-cells = <1>;
> > +		#size-cells = <0>;
> > +		clocks = <&sclk>;
> > +	};
> > +
> > +	- Within dts:
> > +	mmc-slot@0 {
> 
> Need to show this is a child node.

OK.

> > +		compatible = "cavium,thunder-8390-mmc-slot";
> > +		reg = <0>;
> > +		voltage-ranges = <3300 3300>;
> > +		max-frequency = <42000000>;
> > +		bus-width = <4>;
> > +		cap-sd-highspeed;
> > +	};
> > +	mmc-slot@1 {
> > +		compatible = "cavium,thunder-8390-mmc-slot";
> > +		reg = <1>;
> > +		voltage-ranges = <3300 3300>;
> > +		max-frequency = <42000000>;
> > +		bus-width = <8>;
> > +		cap-mmc-highspeed;
> > +		non-removable;
> > +	};
> > -- 
> > 2.9.0.rc0.21.g7777322
> >