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net: phy: Add helper to convert MII ADV register to a linkmode

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The phy_mii_ioctl can be used to write a value into the MII_ADVERTISE
register in the PHY. Since this changes the state of the PHY, we need
to make the same change to phydev->advertising. Add a helper which can
convert the register value to a linkmode.

Signed-off-by: Andrew Lunn <andrew@lunn.ch>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Reviewed-by: Maxime Chevallier <maxime.chevallier@bootlin.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Andrew Lunn 2018-09-29 23:04:12 +02:00 committed by David S. Miller
parent c4fabb8b3c
commit edc7ccbbcf
1 changed files with 31 additions and 0 deletions
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31
include/linux/mii.h
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@ -303,6 +303,37 @@ static inline u32 mii_lpa_to_ethtool_lpa_x(u32 lpa)
return result | mii_adv_to_ethtool_adv_x(lpa);
}
/**
* mii_adv_to_linkmode_adv_t
* @advertising:pointer to destination link mode.
* @adv: value of the MII_ADVERTISE register
*
* A small helper function that translates MII_ADVERTISE bits
* to linkmode advertisement settings.
*/
static inline void mii_adv_to_linkmode_adv_t(unsigned long *advertising,
u32 adv)
{
linkmode_zero(advertising);
if (adv & ADVERTISE_10HALF)
linkmode_set_bit(ETHTOOL_LINK_MODE_10baseT_Half_BIT,
advertising);
if (adv & ADVERTISE_10FULL)
linkmode_set_bit(ETHTOOL_LINK_MODE_10baseT_Full_BIT,
advertising);
if (adv & ADVERTISE_100HALF)
linkmode_set_bit(ETHTOOL_LINK_MODE_100baseT_Half_BIT,
advertising);
if (adv & ADVERTISE_100FULL)
linkmode_set_bit(ETHTOOL_LINK_MODE_100baseT_Full_BIT,
advertising);
if (adv & ADVERTISE_PAUSE_CAP)
linkmode_set_bit(ETHTOOL_LINK_MODE_Pause_BIT, advertising);
if (adv & ADVERTISE_PAUSE_ASYM)
linkmode_set_bit(ETHTOOL_LINK_MODE_Asym_Pause_BIT, advertising);
}
/**
* mii_advertise_flowctrl - get flow control advertisement flags
* @cap: Flow control capabilities (FLOW_CTRL_RX, FLOW_CTRL_TX or both)