linux-kernel - RE: [PATCH net-next v2 2/4] net: dsa: mv88e6060: setup random mac address

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Message-ID: <9235D6609DB808459E95D78E17F2E43D40B51650@CHN-SV-EXMX02.mchp-main.com>
Date:   Fri, 13 Oct 2017 17:59:00 +0000
From:   <Woojung.Huh@...rochip.com>
To:     <vivien.didelot@...oirfairelinux.com>, <David.Laight@...LAB.COM>,
        <netdev@...r.kernel.org>
CC:     <linux-kernel@...r.kernel.org>, <kernel@...oirfairelinux.com>,
        <davem@...emloft.net>, <f.fainelli@...il.com>, <andrew@...n.ch>
Subject: RE: [PATCH net-next v2 2/4] net: dsa: mv88e6060: setup random mac
 address

Hi Vivien,

> >> > +	REG_WRITE(REG_GLOBAL, GLOBAL_MAC_01, (addr[0] << 9) |
> >> addr[1]);
> >>
> >> Is that supposed to be 9 ?
> >
> > Looks like it.
> > Check
> http://www.marvell.com/switching/assets/marvell_linkstreet_88E6060_data
> sheet.pdf
> 
> Hum, David is correct, there is a bug in the driver which needs to be
> addressed first. MAC address bit 40 is addr[0] & 0x1, thus we must
> shift byte 0 by 8 and mask it against 0xfe.
> 
> I'll respin this serie including a fix for both net and net-next.

Yes, you are right. Missed description about bit 40.

Thanks.
Woojung