netdev - Re: [PATCH] stmmac: Add device-tree support

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Message-ID: <4F61AC2B.30609@st.com>
Date:	Thu, 15 Mar 2012 09:45:31 +0100
From:	Giuseppe CAVALLARO <peppe.cavallaro@...com>
To:	Jean-Christophe PLAGNIOL-VILLARD <plagnioj@...osoft.com>
Cc:	Stefan Roese <sr@...x.de>, netdev@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org,
	devicetree-discuss@...abs.org, Viresh Kumar <viresh.kumar@...com>
Subject: Re: [PATCH] stmmac: Add device-tree support

On 3/14/2012 5:26 PM, Jean-Christophe PLAGNIOL-VILLARD wrote:
> On 12:38 Wed 14 Mar     , Giuseppe CAVALLARO wrote:
>> On 3/12/2012 3:38 PM, Jean-Christophe PLAGNIOL-VILLARD wrote:
>>> On 15:05 Mon 12 Mar     , Stefan Roese wrote:
>>>> This patch adds support to configure the STMMAC ethernet driver via
>>>> device-tree instead of platform_data.
>>>>
>>>> Currently, only the properties needed on SPEAr600 are provided. All
>>>> other properties should be added once needed on other platforms.
>>>>
>>>> Signed-off-by: Stefan Roese <sr@...x.de>
>>>> Cc: Giuseppe Cavallaro <peppe.cavallaro@...com>
>>>> Cc: Viresh Kumar <viresh.kumar@...com>
>>>> ---
>>>>  Documentation/devicetree/bindings/net/stmmac.txt   |   38 +++++++++++
>>>>  .../net/ethernet/stmicro/stmmac/stmmac_platform.c  |   66 +++++++++++++++++++-
>>>>  2 files changed, 103 insertions(+), 1 deletion(-)
>>>>  create mode 100644 Documentation/devicetree/bindings/net/stmmac.txt
>>>>
>>>> diff --git a/Documentation/devicetree/bindings/net/stmmac.txt b/Documentation/devicetree/bindings/net/stmmac.txt
>>>> new file mode 100644
>>>> index 0000000..386a47f
>>>> --- /dev/null
>>>> +++ b/Documentation/devicetree/bindings/net/stmmac.txt
>>>> @@ -0,0 +1,38 @@
>>>> +* STMicroelectronics 10/100/1000 Ethernet driver (GMAC)
>>>> +
>>>> +Required properties:
>>>> +- compatible: Should be "stm,gmac"
>>
>>> this IP have 2 version at least the GMAC for the second generation and mac for
>>> the first generation
>>
>> yes you are right. STMMAC supports two device generations I named:
>> dwma10/100 and dwmac1000 (gmac).
>>
>> Concerning the latter, we support several different versions of the
>> synopsys GMAC cores ... from 3.30 to 3.61a.
>>
>> For example, stx7108 and Stx7109 have the same GMAC core (also SPEAr600
>> IIRC).
> no PM the PM was only since 7108 IIRC

Sorry! you are right :-)

7109 has the mac10/100 (databook 1.91) and 7105/8 have the gmac databook
3.30.

peppe

> 
> 7109 use mac not gmac IIRC it's 7105 that start to use the GMAC with 300Mbps
> max
>> SPEAr13xx has 3.50a
>> New ST SoC Stxh415 has the 3.60a. etc.
>>
>>>> +- reg: Address and length of the register set for the device
>>>> +- interrupt-parent: Should be the phandle for the interrupt controller
>>>> +  that services interrupts for this device
>>>> +- interrupts: Should contain the STMMAC interrupts
>>>> +- interrupt-names: Should contain the interrupt names "macirq"
>>>> +  "eth_wake_irq" if this interrupt is supported in the "interrupts"
>>>> +  property
>>> optionnal
>>
>> yes
>>
>> note that there will be a new field for lpi IRQ as well
>>
>>>> +- phy-mode: String, operation mode of the PHY interface.
>>>> +  Supported values are: "mii", "rmii", "gmii", "rgmii".
>>>> +- phy-addr: MDIO address of the PHY
>>>> +
>>>> +Optional properties:
>>>> +- stm,prog-burst-len: Specify the burst length
>>>> +- stm,has-gmac: Indicates that the controller supports 1000Mbps
>>> this IP support more mode 10/100/300/1000
>>
>> has_gmac was used to understand on devices w/o the HW cap registers if
>> the core is a gmac... another useful parameter could be : enh_desc
> this need to manage via compatible
> 
> Best Regards,
> J.
> 

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