linux-kernel - Re: [PATCH v3 net-next] net: stmmac: Add support for MDIO interrupts

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Message-ID: <20190906142446.GA29611@lunn.ch>
Date:   Fri, 6 Sep 2019 16:24:46 +0200
From:   Andrew Lunn <andrew@...n.ch>
To:     Jose Abreu <Jose.Abreu@...opsys.com>
Cc:     Voon Weifeng <weifeng.voon@...el.com>,
        "David S. Miller" <davem@...emloft.net>,
        Maxime Coquelin <mcoquelin.stm32@...il.com>,
        "netdev@...r.kernel.org" <netdev@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        Giuseppe Cavallaro <peppe.cavallaro@...com>,
        Alexandre Torgue <alexandre.torgue@...com>,
        Ong Boon Leong <boon.leong.ong@...el.com>
Subject: Re: [PATCH v3 net-next] net: stmmac: Add support for MDIO interrupts

On Fri, Sep 06, 2019 at 01:31:14PM +0000, Jose Abreu wrote:
> From: Voon Weifeng <weifeng.voon@...el.com>
> Date: Sep/05/2019, 13:05:30 (UTC+00:00)
> 
> > DW EQoS v5.xx controllers added capability for interrupt generation
> > when MDIO interface is done (GMII Busy bit is cleared).
> > This patch adds support for this interrupt on supported HW to avoid
> > polling on GMII Busy bit.
> 
> Better leave the enabling of this optional because the support for it is 
> also optional depending on the IP HW configuration.

Hi Jose

If there a register which indicates if this feature is part of the IP?

   Andrew