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SubjectRE: [PATCH] net: phy: marvell: clear wol event before setting it
Date
Hi,

> -----Original Message-----
> From: netdev-owner@vger.kernel.org <netdev-owner@vger.kernel.org> On
> Behalf Of Jisheng Zhang
> Sent: Thursday, April 19, 2018 1:33 PM
> To: Andrew Lunn <andrew@lunn.ch>; Florian Fainelli <f.fainelli@gmail.com>;
> David S. Miller <davem@davemloft.net>
> Cc: netdev@vger.kernel.org; linux-kernel@vger.kernel.org; Jingju Hou
> <Jingju.Hou@synaptics.com>
> Subject: [PATCH] net: phy: marvell: clear wol event before setting it
>
> From: Jingju Hou <Jingju.Hou@synaptics.com>
>
> If WOL event happened once, the LED[2] interrupt pin will not be cleared unless
> reading the CSISR register. So clear the WOL event before enabling it.
>
> Signed-off-by: Jingju Hou <Jingju.Hou@synaptics.com>
> Signed-off-by: Jisheng Zhang <Jisheng.Zhang@synaptics.com>
> ---
> drivers/net/phy/marvell.c | 9 +++++++++
> 1 file changed, 9 insertions(+)
>
> diff --git a/drivers/net/phy/marvell.c b/drivers/net/phy/marvell.c index
> c22e8e383247..b6abe1cbc84b 100644
> --- a/drivers/net/phy/marvell.c
> +++ b/drivers/net/phy/marvell.c
> @@ -115,6 +115,9 @@
> /* WOL Event Interrupt Enable */
> #define MII_88E1318S_PHY_CSIER_WOL_EIE BIT(7)
>
> +/* Copper Specific Interrupt Status Register */
> +#define MII_88E1318S_PHY_CSISR 0x13
> +

There is already macro to represent this register - MII_M1011_IEVENT. Do we need this macro ?

> /* LED Timer Control Register */
> #define MII_88E1318S_PHY_LED_TCR 0x12
> #define MII_88E1318S_PHY_LED_TCR_FORCE_INT BIT(15)
> @@ -1393,6 +1396,12 @@ static int m88e1318_set_wol(struct phy_device
> *phydev,
> if (err < 0)
> goto error;
>
> + /* If WOL event happened once, the LED[2] interrupt pin
> + * will not be cleared unless reading the CSISR register.
> + * So clear the WOL event first before enabling it.
> + */
> + phy_read(phydev, MII_88E1318S_PHY_CSISR);

This part of the operation already taken care by ack_interrupt and did_interrupt
[....]
.ack_interrupt = &marvell_ack_interrupt,
.did_interrupt = &m88e1121_did_interrupt,
[...]

If at all WOL event occurred marvell_ack_interrupt will take care of clearing the interrupt status register.
Am I missing anything here ?

> /* Enable the WOL interrupt */
> err = __phy_modify(phydev, MII_88E1318S_PHY_CSIER, 0,
> MII_88E1318S_PHY_CSIER_WOL_EIE);
> --
> 2.17.0

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