netdev - Re: [PATCH 2/2] sh_eth: remove 'register_type' field from 'struct sh_eth_plat

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Message-ID: <5213E92D.7070004@cogentembedded.com>
Date:	Wed, 21 Aug 2013 02:09:49 +0400
From:	Sergei Shtylyov <sergei.shtylyov@...entembedded.com>
To:	Laurent Pinchart <laurent.pinchart@...asonboard.com>
CC:	netdev@...r.kernel.org, davem@...emloft.net, lethal@...ux-sh.org,
	linux-sh@...r.kernel.org
Subject: Re: [PATCH 2/2] sh_eth: remove 'register_type' field from 'struct
 sh_eth_plat_data'

Hello.

On 08/20/2013 06:27 PM, Sergei Shtylyov wrote:

>>> Now that the 'register_type' field of the 'sh_eth' driver's platform data is
>>> not used by the driver anymore, it's time to remove it and  its
>>> initializers from the SH platform code. Also  move *enum* declaring values
>>> for this  field from <linux/sh_eth.h>  to  the  local driver's  header file
>>> as they're only needed by the driver itself  now...

>>> Signed-off-by: Sergei Shtylyov <sergei.shtylyov@...entembedded.com>
[...]

>>>   /* Driver's parameters */
>>>   #if defined(CONFIG_CPU_SH4) || defined(CONFIG_ARCH_SHMOBILE)
>>>   #define SH4_SKB_RX_ALIGN    32
>>> Index: net-next/include/linux/sh_eth.h
>>> ===================================================================
>>> --- net-next.orig/include/linux/sh_eth.h
>>> +++ net-next/include/linux/sh_eth.h
>>> @@ -5,17 +5,10 @@
>>>   #include <linux/if_ether.h>
>>>
>>>   enum {EDMAC_LITTLE_ENDIAN, EDMAC_BIG_ENDIAN};
>>> -enum {
>>> -    SH_ETH_REG_GIGABIT,
>>> -    SH_ETH_REG_FAST_RCAR,
>>> -    SH_ETH_REG_FAST_SH4,
>>> -    SH_ETH_REG_FAST_SH3_SH2
>>> -};
>>>
>>>   struct sh_eth_plat_data {
>>>       int phy;
>>>       int edmac_endian;

>> Wouldn't it make sense to move the edmac_endian field to sh_eth_cpu_data as
>> well ?

>     No, it depends on the SoC endianness which is determined by power-on pin
> strapping -- which is board specific.

    BTW, I don't think the driver works correctly in the BE case since it uses 
io{read|write}32() to access the registers and those functions assume LE 
ordering on MMIO.

WBR, Sergei

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