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 for barebox@lists.infradead.org; Fri, 12 Jul 2019 06:40:32 +0000
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From: Benjamin Beckmeyer <beb@eks-engel.de>
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Date: Fri, 12 Jul 2019 08:40:13 +0200
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Subject: Re: MII command to read and write specific registers
To: Antony Pavlov <antonynpavlov@gmail.com>
Cc: barebox@lists.infradead.org

> On Thu, 11 Jul 2019 15:30:01 +0200
> Benjamin Beckmeyer <beb@eks-engel.de> wrote:
>
>> Hey all,
>> is there a possibility to read/write specific registers from/to different MII addresses?
>>
>> I know that there is miitool but it just can give me the first 16 registers of a PHY.
>> But I need write specific registers e.g. MII addr 2 register 0 and read MII addr 2 
>> register 1. I know uboot is having the mii command(exactly what I would need), and I 
>> have seen that there were parameters for address and register in miitool but they 
>> were deleted lastly.
>>
> Hi Benjamin!
>
> You can use /dev/mdio* devices for reading/writing MII registers.
> E.g.
>   md -s /dev/mdio0-phy00
>   mw -d /dev/mdio0-phy00 -w 0 0x12345678
>
> Just after barebox boot there is no /dev/mdio* devices.
> After network interface initialization (e.g. after ifup command) or
> after miitool command  the /dev/mdio* devices appear.

Hi Antony,

thanks for your reply. That will help me a lot.

Best regards,
Benjamin


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