netdev - Re: [PATCH] net: sh-eth: Add flag to determine the type of TSU register

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Date:	Tue, 07 May 2013 11:36:49 +0900
From:	Nobuhiro Iwamatsu <nobuhiro.iwamatsu.yj@...esas.com>
To:	Sergei Shtylyov <sergei.shtylyov@...entembedded.com>
Cc:	netdev@...r.kernel.org, yoshihiro.shimoda.uh@...esas.com
Subject: Re: [PATCH] net: sh-eth: Add flag to determine the type of TSU register

(2013/04/18 23:48), Sergei Shtylyov wrote:
> Hello.
>
> On 18-04-2013 5:26, Nobuhiro Iwamatsu wrote:
>
>> Some sh-eth devices may have two ether devices in the inside.
>
> s/in the//

I will remove this.

>
>> And the function of TSU is accessed from each ether device.
>> In this case, sh-eth need to remap address using devm_ioremap(),
>> without using devm_ioremap_resource().
>
> Do you mean TSU region is shared between Ether devices?
>
>> acl_multi_reg
>
> You meant 'tsu_multi_reg'.
>
>> of sh_eth_cpu_data is used for this control.
>
> So, "multi" here means "shared"?
>

Yes, your comment is right.
I will change variable name from tsu_multi_reg to tsu_shared_reg.

>> Signed-off-by: Nobuhiro Iwamatsu <nobuhiro.iwamatsu.yj@...esas.com>
> [...]
>
>> diff --git a/drivers/net/ethernet/renesas/sh_eth.c b/drivers/net/ethernet/renesas/sh_eth.c
>> index a7499cb..d9458ae 100644
>> --- a/drivers/net/ethernet/renesas/sh_eth.c
>> +++ b/drivers/net/ethernet/renesas/sh_eth.c
> [...]
>> @@ -2743,7 +2747,12 @@ static int sh_eth_drv_probe(struct platform_device *pdev)
>> ret = -ENODEV;
>> goto out_release;
>> }
>> - mdp->tsu_addr = devm_ioremap_resource(&pdev->dev, rtsu);
>> +
>> + if (mdp->cd->tsu_multi_reg)
>> + mdp->tsu_addr = devm_ioremap(&pdev->dev, rtsu->start,
>> + resource_size(rtsu));
>> + else
>> + mdp->tsu_addr = devm_ioremap_resource(&pdev->dev, rtsu);
>> if (IS_ERR(mdp->tsu_addr)) {
>> ret = PTR_ERR(mdp->tsu_addr);
>> goto out_release;
>> diff --git a/drivers/net/ethernet/renesas/sh_eth.h b/drivers/net/ethernet/renesas/sh_eth.h
>> index 1ddc9f2..6f9a997 100644
>> --- a/drivers/net/ethernet/renesas/sh_eth.h
>> +++ b/drivers/net/ethernet/renesas/sh_eth.h
>> @@ -472,6 +472,7 @@ struct sh_eth_cpu_data {
>> unsigned tpauser:1; /* EtherC have TPAUSER */
>> unsigned bculr:1; /* EtherC have BCULR */
>> unsigned tsu:1; /* EtherC have TSU */
>> + unsigned tsu_multi_reg:1; /* EtherC have TSU multi register */
>
> Please indent the comment with tab(s) like all the others.

OK, I will fix.

Nobuhiro
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