Add a MV88E6XXX_FLAG_EEE flag to describe switch models featuring Energy
Efficient Ethernet. Use it to conditionally support such access in the
common code.

Signed-off-by: Vivien Didelot <vivien.dide...@savoirfairelinux.com>
---
 drivers/net/dsa/mv88e6123.c |  2 ++
 drivers/net/dsa/mv88e6131.c |  2 ++
 drivers/net/dsa/mv88e6171.c |  2 ++
 drivers/net/dsa/mv88e6352.c | 18 ++++++++++++------
 drivers/net/dsa/mv88e6xxx.c |  6 ++++++
 drivers/net/dsa/mv88e6xxx.h |  5 +++++
 6 files changed, 29 insertions(+), 6 deletions(-)

diff --git a/drivers/net/dsa/mv88e6123.c b/drivers/net/dsa/mv88e6123.c
index 57a6d76..e5335c2 100644
--- a/drivers/net/dsa/mv88e6123.c
+++ b/drivers/net/dsa/mv88e6123.c
@@ -120,6 +120,8 @@ struct dsa_switch_driver mv88e6123_switch_driver = {
        .set_addr               = mv88e6xxx_set_addr,
        .phy_read               = mv88e6xxx_phy_read,
        .phy_write              = mv88e6xxx_phy_write,
+       .set_eee                = mv88e6xxx_set_eee,
+       .get_eee                = mv88e6xxx_get_eee,
        .get_strings            = mv88e6xxx_get_strings,
        .get_ethtool_stats      = mv88e6xxx_get_ethtool_stats,
        .get_sset_count         = mv88e6xxx_get_sset_count,
diff --git a/drivers/net/dsa/mv88e6131.c b/drivers/net/dsa/mv88e6131.c
index 519d1eb..73cf879 100644
--- a/drivers/net/dsa/mv88e6131.c
+++ b/drivers/net/dsa/mv88e6131.c
@@ -150,6 +150,8 @@ struct dsa_switch_driver mv88e6131_switch_driver = {
        .set_addr               = mv88e6xxx_set_addr,
        .phy_read               = mv88e6xxx_phy_read,
        .phy_write              = mv88e6xxx_phy_write,
+       .set_eee                = mv88e6xxx_set_eee,
+       .get_eee                = mv88e6xxx_get_eee,
        .get_strings            = mv88e6xxx_get_strings,
        .get_ethtool_stats      = mv88e6xxx_get_ethtool_stats,
        .get_sset_count         = mv88e6xxx_get_sset_count,
diff --git a/drivers/net/dsa/mv88e6171.c b/drivers/net/dsa/mv88e6171.c
index f947950..6953d12 100644
--- a/drivers/net/dsa/mv88e6171.c
+++ b/drivers/net/dsa/mv88e6171.c
@@ -134,6 +134,8 @@ struct dsa_switch_driver mv88e6171_switch_driver = {
        .set_addr               = mv88e6xxx_set_addr,
        .phy_read               = mv88e6xxx_phy_read,
        .phy_write              = mv88e6xxx_phy_write,
+       .set_eee                = mv88e6xxx_set_eee,
+       .get_eee                = mv88e6xxx_get_eee,
        .get_strings            = mv88e6xxx_get_strings,
        .get_ethtool_stats      = mv88e6xxx_get_ethtool_stats,
        .get_sset_count         = mv88e6xxx_get_sset_count,
diff --git a/drivers/net/dsa/mv88e6352.c b/drivers/net/dsa/mv88e6352.c
index 90732da..d4ebfb3 100644
--- a/drivers/net/dsa/mv88e6352.c
+++ b/drivers/net/dsa/mv88e6352.c
@@ -29,7 +29,8 @@ static const struct mv88e6xxx_info mv88e6352_table[] = {
                .name = "Marvell 88E6320",
                .num_databases = 4096,
                .num_ports = 7,
-               .flags = MV88E6XXX_FLAG_EEPROM |
+               .flags = MV88E6XXX_FLAG_EEE |
+                       MV88E6XXX_FLAG_EEPROM |
                        MV88E6XXX_FLAG_SMI_PHY |
                        MV88E6XXX_FLAG_SWITCH_MAC |
                        MV88E6XXX_FLAG_TEMP |
@@ -40,7 +41,8 @@ static const struct mv88e6xxx_info mv88e6352_table[] = {
                .name = "Marvell 88E6321",
                .num_databases = 4096,
                .num_ports = 7,
-               .flags = MV88E6XXX_FLAG_EEPROM |
+               .flags = MV88E6XXX_FLAG_EEE |
+                       MV88E6XXX_FLAG_EEPROM |
                        MV88E6XXX_FLAG_SMI_PHY |
                        MV88E6XXX_FLAG_SWITCH_MAC |
                        MV88E6XXX_FLAG_TEMP |
@@ -51,7 +53,8 @@ static const struct mv88e6xxx_info mv88e6352_table[] = {
                .name = "Marvell 88E6172",
                .num_databases = 4096,
                .num_ports = 7,
-               .flags = MV88E6XXX_FLAG_EEPROM |
+               .flags = MV88E6XXX_FLAG_EEE |
+                       MV88E6XXX_FLAG_EEPROM |
                        MV88E6XXX_FLAG_SMI_PHY |
                        MV88E6XXX_FLAG_SWITCH_MAC |
                        MV88E6XXX_FLAG_TEMP |
@@ -62,7 +65,8 @@ static const struct mv88e6xxx_info mv88e6352_table[] = {
                .name = "Marvell 88E6176",
                .num_databases = 4096,
                .num_ports = 7,
-               .flags = MV88E6XXX_FLAG_EEPROM |
+               .flags = MV88E6XXX_FLAG_EEE |
+                       MV88E6XXX_FLAG_EEPROM |
                        MV88E6XXX_FLAG_SMI_PHY |
                        MV88E6XXX_FLAG_SWITCH_MAC |
                        MV88E6XXX_FLAG_TEMP |
@@ -73,7 +77,8 @@ static const struct mv88e6xxx_info mv88e6352_table[] = {
                .name = "Marvell 88E6240",
                .num_databases = 4096,
                .num_ports = 7,
-               .flags = MV88E6XXX_FLAG_EEPROM |
+               .flags = MV88E6XXX_FLAG_EEE |
+                       MV88E6XXX_FLAG_EEPROM |
                        MV88E6XXX_FLAG_SMI_PHY |
                        MV88E6XXX_FLAG_SWITCH_MAC |
                        MV88E6XXX_FLAG_TEMP |
@@ -84,7 +89,8 @@ static const struct mv88e6xxx_info mv88e6352_table[] = {
                .name = "Marvell 88E6352",
                .num_databases = 4096,
                .num_ports = 7,
-               .flags = MV88E6XXX_FLAG_EEPROM |
+               .flags = MV88E6XXX_FLAG_EEE |
+                       MV88E6XXX_FLAG_EEPROM |
                        MV88E6XXX_FLAG_SMI_PHY |
                        MV88E6XXX_FLAG_SWITCH_MAC |
                        MV88E6XXX_FLAG_TEMP |
diff --git a/drivers/net/dsa/mv88e6xxx.c b/drivers/net/dsa/mv88e6xxx.c
index 5483e69..1fbd6d2 100644
--- a/drivers/net/dsa/mv88e6xxx.c
+++ b/drivers/net/dsa/mv88e6xxx.c
@@ -1032,6 +1032,9 @@ int mv88e6xxx_get_eee(struct dsa_switch *ds, int port, 
struct ethtool_eee *e)
        struct mv88e6xxx_priv_state *ps = ds_to_priv(ds);
        int reg;
 
+       if (!mv88e6xxx_has(ps, MV88E6XXX_FLAG_EEE))
+               return -EOPNOTSUPP;
+
        mutex_lock(&ps->smi_mutex);
 
        reg = _mv88e6xxx_phy_read_indirect(ps, port, 16);
@@ -1060,6 +1063,9 @@ int mv88e6xxx_set_eee(struct dsa_switch *ds, int port,
        int reg;
        int ret;
 
+       if (!mv88e6xxx_has(ps, MV88E6XXX_FLAG_EEE))
+               return -EOPNOTSUPP;
+
        mutex_lock(&ps->smi_mutex);
 
        ret = _mv88e6xxx_phy_read_indirect(ps, port, 16);
diff --git a/drivers/net/dsa/mv88e6xxx.h b/drivers/net/dsa/mv88e6xxx.h
index 72b563e..305bccf 100644
--- a/drivers/net/dsa/mv88e6xxx.h
+++ b/drivers/net/dsa/mv88e6xxx.h
@@ -351,6 +351,10 @@ enum mv88e6xxx_family {
 };
 
 enum mv88e6xxx_cap {
+       /* Energy Efficient Ethernet.
+        */
+       MV88E6XXX_CAP_EEE,
+
        /* EEPROM Command and Data registers.
         * See GLOBAL2_EEPROM_OP and GLOBAL2_EEPROM_DATA.
         */
@@ -382,6 +386,7 @@ enum mv88e6xxx_cap {
 };
 
 /* Bitmask of capabilities */
+#define MV88E6XXX_FLAG_EEE             BIT(MV88E6XXX_CAP_EEE)
 #define MV88E6XXX_FLAG_EEPROM          BIT(MV88E6XXX_CAP_EEPROM)
 #define MV88E6XXX_FLAG_PPU             BIT(MV88E6XXX_CAP_PPU)
 #define MV88E6XXX_FLAG_SMI_PHY         BIT(MV88E6XXX_CAP_SMI_PHY)
-- 
2.8.2

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