netdev - RE: [EXT] Re: [PATCH net 2/3] of_net: add property "nvmem-mac-address" for of_get_mac

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Date:   Mon, 13 May 2019 03:31:59 +0000
From:   Andy Duan <fugang.duan@....com>
To:     Andrew Lunn <andrew@...n.ch>
CC:     "davem@...emloft.net" <davem@...emloft.net>,
        "netdev@...r.kernel.org" <netdev@...r.kernel.org>,
        "ynezz@...e.cz" <ynezz@...e.cz>,
        "john@...ozen.org" <john@...ozen.org>,
        "bgolaszewski@...libre.com" <bgolaszewski@...libre.com>,
        Petr Štetiar <ynezz@...e.cz>,
        Maxime Ripard <maxime.ripard@...tlin.com>
Subject: RE: [EXT] Re: [PATCH net 2/3] of_net: add property
 "nvmem-mac-address" for of_get_mac_addr()

From: Andrew Lunn <andrew@...n.ch> Sent: Saturday, May 11, 2019 2:18 AM
> On Fri, May 10, 2019 at 08:24:03AM +0000, Andy Duan wrote:
> > If MAC address read from nvmem cell and it is valid mac address,
> > .of_get_mac_addr_nvmem() add new property "nvmem-mac-address" in
> > ethernet node. Once user call .of_get_mac_address() to get MAC address
> > again, it can read valid MAC address from device tree in directly.
> 
> I suspect putting the MAC address into OF will go away in a follow up patch. It
> is a bad idea.
> 
>        Andrew

I don't know the history why does of_get_mac_addr_nvmem() add the new property
"nvmem-mac-address" into OF. But if it already did that, so the patch add the property
check in . of_get_mac_address() to avoid multiple read nvmem cells in driver.

Andy