linux-kernel - Re: [PATCH 03/16] net: phy: adin: add support for interrupts

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Message-ID: <e73fe0a4fecaf9612ddef701220319fb018c27b7.camel@analog.com>
Date:   Tue, 6 Aug 2019 06:38:31 +0000
From:   "Ardelean, Alexandru" <alexandru.Ardelean@...log.com>
To:     "devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
        "hkallweit1@...il.com" <hkallweit1@...il.com>,
        "netdev@...r.kernel.org" <netdev@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
CC:     "f.fainelli@...il.com" <f.fainelli@...il.com>,
        "davem@...emloft.net" <davem@...emloft.net>,
        "mark.rutland@....com" <mark.rutland@....com>,
        "robh+dt@...nel.org" <robh+dt@...nel.org>,
        "andrew@...n.ch" <andrew@...n.ch>
Subject: Re: [PATCH 03/16] net: phy: adin: add support for interrupts

On Mon, 2019-08-05 at 23:02 +0200, Heiner Kallweit wrote:
> [External]
> 
> On 05.08.2019 18:54, Alexandru Ardelean wrote:
> > This change adds support for enabling PHY interrupts that can be used by
> > the PHY framework to get signal for link/speed/auto-negotiation changes.
> > 
> > Signed-off-by: Alexandru Ardelean <alexandru.ardelean@...log.com>
> > ---
> >  drivers/net/phy/adin.c | 44 ++++++++++++++++++++++++++++++++++++++++++
> >  1 file changed, 44 insertions(+)
> > 
> > diff --git a/drivers/net/phy/adin.c b/drivers/net/phy/adin.c
> > index c100a0dd95cd..b75c723bda79 100644
> > --- a/drivers/net/phy/adin.c
> > +++ b/drivers/net/phy/adin.c
> > @@ -14,6 +14,22 @@
> >  #define PHY_ID_ADIN1200				0x0283bc20
> >  #define PHY_ID_ADIN1300				0x0283bc30
> >  
> > +#define ADIN1300_INT_MASK_REG			0x0018
> > +#define   ADIN1300_INT_MDIO_SYNC_EN		BIT(9)
> > +#define   ADIN1300_INT_ANEG_STAT_CHNG_EN	BIT(8)
> > +#define   ADIN1300_INT_ANEG_PAGE_RX_EN		BIT(6)
> > +#define   ADIN1300_INT_IDLE_ERR_CNT_EN		BIT(5)
> > +#define   ADIN1300_INT_MAC_FIFO_OU_EN		BIT(4)
> > +#define   ADIN1300_INT_RX_STAT_CHNG_EN		BIT(3)
> > +#define   ADIN1300_INT_LINK_STAT_CHNG_EN	BIT(2)
> > +#define   ADIN1300_INT_SPEED_CHNG_EN		BIT(1)
> > +#define   ADIN1300_INT_HW_IRQ_EN		BIT(0)
> > +#define ADIN1300_INT_MASK_EN	\
> > +	(ADIN1300_INT_ANEG_STAT_CHNG_EN | ADIN1300_INT_ANEG_PAGE_RX_EN | \
> > +	 ADIN1300_INT_LINK_STAT_CHNG_EN | ADIN1300_INT_SPEED_CHNG_EN | \
> > +	 ADIN1300_INT_HW_IRQ_EN)
> > +#define ADIN1300_INT_STATUS_REG			0x0019
> > +
> >  static int adin_config_init(struct phy_device *phydev)
> >  {
> >  	int rc;
> > @@ -25,15 +41,40 @@ static int adin_config_init(struct phy_device *phydev)
> >  	return 0;
> >  }
> >  
> > +static int adin_phy_ack_intr(struct phy_device *phydev)
> > +{
> > +	int ret;
> > +
> > +	/* Clear pending interrupts.  */
> > +	ret = phy_read(phydev, ADIN1300_INT_STATUS_REG);
> > +	if (ret < 0)
> > +		return ret;
> > +
> > +	return 0;
> > +}
> > +
> > +static int adin_phy_config_intr(struct phy_device *phydev)
> > +{
> > +	if (phydev->interrupts == PHY_INTERRUPT_ENABLED)
> > +		return phy_set_bits(phydev, ADIN1300_INT_MASK_REG,
> > +				    ADIN1300_INT_MASK_EN);
> > +
> > +	return phy_clear_bits(phydev, ADIN1300_INT_MASK_REG,
> > +			      ADIN1300_INT_MASK_EN);
> > +}
> > +
> >  static struct phy_driver adin_driver[] = {
> >  	{
> >  		.phy_id		= PHY_ID_ADIN1200,
> >  		.name		= "ADIN1200",
> >  		.phy_id_mask	= 0xfffffff0,
> >  		.features	= PHY_BASIC_FEATURES,
> > +		.flags		= PHY_HAS_INTERRUPT,
> 
> This flag doesn't exist any longer. This indicates that you
> develop against an older kernel version. Please develop
> against net-next. Check up-to-date drivers like the one
> for Realtek PHY's for hints.

ack;

> 
> >  		.config_init	= adin_config_init,
> >  		.config_aneg	= genphy_config_aneg,
> >  		.read_status	= genphy_read_status,
> > +		.ack_interrupt	= adin_phy_ack_intr,
> > +		.config_intr	= adin_phy_config_intr,
> >  		.resume		= genphy_resume,
> >  		.suspend	= genphy_suspend,
> >  	},
> > @@ -42,9 +83,12 @@ static struct phy_driver adin_driver[] = {
> >  		.name		= "ADIN1300",
> >  		.phy_id_mask	= 0xfffffff0,
> >  		.features	= PHY_GBIT_FEATURES,
> > +		.flags		= PHY_HAS_INTERRUPT,
> >  		.config_init	= adin_config_init,
> >  		.config_aneg	= genphy_config_aneg,
> >  		.read_status	= genphy_read_status,
> > +		.ack_interrupt	= adin_phy_ack_intr,
> > +		.config_intr	= adin_phy_config_intr,
> >  		.resume		= genphy_resume,
> >  		.suspend	= genphy_suspend,
> >  	},
> >