netdev - Re: [PATCH net-next v5 09/10] Documentation: add Device tree bindings for Broadcom GENET

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Date:	Fri, 14 Feb 2014 10:19:42 +0000
From:	Mark Rutland <mark.rutland@....com>
To:	Florian Fainelli <f.fainelli@...il.com>
Cc:	"netdev@...r.kernel.org" <netdev@...r.kernel.org>,
	"davem@...emloft.net" <davem@...emloft.net>,
	"devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
	"cernekee@...il.com" <cernekee@...il.com>,
	"romieu@...zoreil.com" <romieu@...zoreil.com>
Subject: Re: [PATCH net-next v5 09/10] Documentation: add Device tree
 bindings for Broadcom GENET

On Fri, Feb 14, 2014 at 12:08:50AM +0000, Florian Fainelli wrote:
> This patch adds the Device Tree bindings for the Broadcom GENET Gigabit
> Ethernet controller. A bunch of examples are provided to illustrate the
> versatile aspect of the hardare.
> 
> Signed-off-by: Florian Fainelli <f.fainelli@...il.com>
> ---
> Changes in v5:
> - respin due to the CONFIG_OF dependency fix
> 
> Changes in v4:
> - respin due to the Kconfig dependency
> 
> Changes in v3
> - improve compatible property description to specify all compatible strings
>   supported
> - move MDIO bus node to a separate section, to separate from the properties
> - detail which exact phy-mode strings are supported and that this refers to
>   the ePAPR 'phy-connection-type' modes
> - fixed MDIO bus node compatible string to match what is really provided by
>   the bootloader and use the same details as for the GENET compatible string
> - add address-cells and size-cells required properties for the GENET device
>   tree node
> - add a better description for the 'fixed-link' property with reference to
>   existing binding documentation
> - add a reference to the Ethernet PHY device tree binding
> - add a description for the interrupts properties
> - add a documentation for the optional clocks properties
> - removed unused and deprecated device_type properties
> 
> Changes in v2:
> - rebased against net-next/master
> 
>  .../devicetree/bindings/net/broadcom-bcmgenet.txt  | 121 +++++++++++++++++++++
>  1 file changed, 121 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/net/broadcom-bcmgenet.txt
> 
> diff --git a/Documentation/devicetree/bindings/net/broadcom-bcmgenet.txt b/Documentation/devicetree/bindings/net/broadcom-bcmgenet.txt
> new file mode 100644
> index 0000000..afd31f9
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/net/broadcom-bcmgenet.txt
> @@ -0,0 +1,121 @@
> +* Broadcom BCM7xxx Ethernet Controller (GENET)
> +
> +Required properties:
> +- compatible: should contain one of "brcm,genet-v1", "brcm,genet-v2",
> +  "brcm,genet-v3", "brcm,genet-v4".
> +- reg: address and length of the register set for the device
> +- interrupts: must be two cells, the first cell is the general purpose
> +  interrupt line, while the second cell is the interrupt for the ring
> +  RX and TX queues operating in ring mode
> +- phy-mode: String, operation mode of the PHY interface. Supported values are
> +  "mii", "rgmii", "rgmii-txid", "rev-mii", "moca". Analogous to ePAPR
> +  "phy-connection-type" values
> +- address-cells: should be 1
> +- size-cells: should be 1
> +
> +Optional properties:
> +- clocks: When provided, must be two cells, first one is the main GENET clock
> +  and the second cell is the Genet Wake-on-LAN clock.

Clocks aren't just cells. They are referred to with phandle +
clock-specificer pairs.

This doesn't document the names that the driver requests the clocks by.
Just listing the clocks isn't sufficient, as any dts will have to add a
clock-names property to get those clocks probed.

Thanks,
Mark.
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