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

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Date:   Mon, 5 Aug 2019 23:02:59 +0200
From:   Heiner Kallweit <hkallweit1@...il.com>
To:     Alexandru Ardelean <alexandru.ardelean@...log.com>,
        netdev@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org
Cc:     davem@...emloft.net, robh+dt@...nel.org, mark.rutland@....com,
        f.fainelli@...il.com, andrew@...n.ch
Subject: Re: [PATCH 03/16] net: phy: adin: add support for interrupts

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.

>  		.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,
>  	},
>