linux-kernel - Re: [PATCH v3 2/4] Documentation: Bindings: Add STM32 DWMAC glue

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Date:	Wed, 2 Mar 2016 12:33:09 -0600
From:	Rob Herring <robh@...nel.org>
To:	Alexandre TORGUE <alexandre.torgue@...il.com>
Cc:	Maxime Coquelin <mcoquelin.stm32@...il.com>,
	Giuseppe Cavallaro <peppe.cavallaro@...com>,
	netdev@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
	linux-kernel@...r.kernel.org, devicetree@...r.kernel.org
Subject: Re: [PATCH v3 2/4] Documentation: Bindings: Add STM32 DWMAC glue

On Fri, Feb 26, 2016 at 11:51:50AM +0100, Alexandre TORGUE wrote:
> Signed-off-by: Alexandre TORGUE <alexandre.torgue@...il.com>
> 
> diff --git a/Documentation/devicetree/bindings/net/stm32-dwmac.txt b/Documentation/devicetree/bindings/net/stm32-dwmac.txt
> new file mode 100644
> index 0000000..67fceda
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/net/stm32-dwmac.txt
> @@ -0,0 +1,40 @@
> +STMicroelectronics STM32 / MCU DWMAC glue layer controller
> +
> +This file documents platform glue layer for stmmac.
> +Please see stmmac.txt for the other unchanged properties.
> +
> +The device node has following properties.
> +
> +Required properties:
> +- compatible:  Should be "st,stm32-dwmac" to select glue, and
> +	       "snps,dwmac-3.50a" to select IP vesrion.
> +- clocks: Should contain the GMAC main clock, and tx clock
> +- compatible:  Should be "st,stm32-dwmac" to select glue and
> +	       "snps,dwmac-3.50a" to select IP version.
> +- clocks: Should contain the MAC main clock
> +- clock-names: Should contain the clock names "stmmaceth".
> +- st,syscon : Should be phandle/offset pair. The phandle to the syscon node which
> +	      encompases the glue register, and the offset of the control register.
> +
> +Optional properties:
> +- clocks: Could contain:
> +	- the tx clock,
> +	- the rx clock
> +- clock-names: Could contain the clock names "tx-clk", "rx-clk"

Either the IP block has 3 clocks or it has 1. If you have a case where 1 
clock feeds all 3 inputs, then list the clock 3 times.

Rob