netdev - [PATCH net-next v2 1/2] net: phy: add helper mii_10gbt_stat_mod_linkmode_lpa

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Date:   Sat, 16 Feb 2019 17:26:05 +0100
From:   Heiner Kallweit <hkallweit1@...il.com>
To:     Andrew Lunn <andrew@...n.ch>,
        Florian Fainelli <f.fainelli@...il.com>,
        David Miller <davem@...emloft.net>
Cc:     "netdev@...r.kernel.org" <netdev@...r.kernel.org>
Subject: [PATCH net-next v2 1/2] net: phy: add helper
 mii_10gbt_stat_mod_linkmode_lpa_t

Similar to the existing helpers for the Clause 22 registers add helper
mii_10gbt_stat_mod_linkmode_lpa_t.

Note that this helper is defined in linux/mdio.h, not like the
Clause 22 helpers in linux/mii.h. Reason is that the Clause 45 register
constants are defined in uapi/linux/mdio.h. And uapi/linux/mdio.h
includes linux/mii.h before defining the C45 register constants.

v2:
- remove helpers that don't have users in this series

Signed-off-by: Heiner Kallweit <hkallweit1@...il.com>
---
 include/linux/mdio.h | 19 +++++++++++++++++++
 1 file changed, 19 insertions(+)

diff --git a/include/linux/mdio.h b/include/linux/mdio.h
index bfa711416..5b872c45f 100644
--- a/include/linux/mdio.h
+++ b/include/linux/mdio.h
@@ -261,6 +261,25 @@ static inline u16 ethtool_adv_to_mmd_eee_adv_t(u32 adv)
 	return reg;
 }
 
+/**
+ * mii_10gbt_stat_mod_linkmode_lpa_t
+ * @advertising: target the linkmode advertisement settings
+ * @adv: value of the C45 10GBASE-T AN STATUS register
+ *
+ * A small helper function that translates C45 10GBASE-T AN STATUS register bits
+ * to linkmode advertisement settings. Other bits in advertising aren't changed.
+ */
+static inline void mii_10gbt_stat_mod_linkmode_lpa_t(unsigned long *advertising,
+						     u32 lpa)
+{
+	linkmode_mod_bit(ETHTOOL_LINK_MODE_2500baseT_Full_BIT,
+			 advertising, lpa & MDIO_AN_10GBT_STAT_LP2_5G);
+	linkmode_mod_bit(ETHTOOL_LINK_MODE_5000baseT_Full_BIT,
+			 advertising, lpa & MDIO_AN_10GBT_STAT_LP5G);
+	linkmode_mod_bit(ETHTOOL_LINK_MODE_10000baseT_Full_BIT,
+			 advertising, lpa & MDIO_AN_10GBT_STAT_LP10G);
+}
+
 int __mdiobus_read(struct mii_bus *bus, int addr, u32 regnum);
 int __mdiobus_write(struct mii_bus *bus, int addr, u32 regnum, u16 val);
 
-- 
2.20.1