From: Andrew Lunn <andrew@lunn.ch>
To: Florian Fainelli <f.fainelli@gmail.com>
Cc: Heiner Kallweit <hkallweit1@gmail.com>,
Russell King - ARM Linux <linux@armlinux.org.uk>,
David Miller <davem@davemloft.net>,
"netdev@vger.kernel.org" <netdev@vger.kernel.org>
Subject: Re: [PATCH RFC] net: phy: add state PERM_FAIL
Date: Mon, 10 Jun 2019 23:27:43 +0200 [thread overview]
Message-ID: <20190610212743.GE2191@lunn.ch> (raw)
In-Reply-To: <68508be9-1a36-48ab-7428-bf6e7f71be59@gmail.com>
> Maybe the broader question is how do you, Heiner and Russell imagine a
> genuine case where the PHY does not have a firmware provided/loaded
> before Linux does take over (say, BoM cost savings dictate no flash can
> be used
I've not seen either of these PHY devices not have a FLASH. I also
wonder how long such a download to RAM takes. I suspect it is
slow. The boards i have, have a 4Mbit Flash, so, 256K 16bit words.
How long does 256K MDIO transfers take, given that they are typically
polled IO? Is that a reasonable design/cost trade off?
Andrew
next prev parent reply other threads:[~2019-06-10 21:27 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-06-10 17:37 [PATCH RFC] net: phy: add state PERM_FAIL Heiner Kallweit
2019-06-10 17:41 ` Florian Fainelli
2019-06-10 18:51 ` Andrew Lunn
2019-06-10 19:06 ` Florian Fainelli
2019-06-10 21:27 ` Andrew Lunn [this message]
2019-06-10 21:44 ` Florian Fainelli
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