[TG3]: Skip phy power down on some devices

Some PHYs should not be powered down in tg3_set_power_state() because
of bugs or other hardware limitations.

Signed-off-by: Michael Chan <mchan@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 14 insertions, 2 deletions

diff --git a/drivers/net/tg3.c b/drivers/net/tg3.c
index cb687fcaae1f..f1d9a07bb888 100644
--- a/drivers/net/tg3.c
+++ b/drivers/net/tg3.c
@@ -1148,6 +1148,19 @@ static int tg3_halt_cpu(struct tg3 *, u32);
 static int tg3_nvram_lock(struct tg3 *);
 static void tg3_nvram_unlock(struct tg3 *);
 
+static void tg3_power_down_phy(struct tg3 *tp)
+{
+        /* The PHY should not be powered down on some chips because
+         * of bugs.
+         */
+        if (GET_ASIC_REV(tp->pci_chip_rev_id) == ASIC_REV_5700 ||
+            GET_ASIC_REV(tp->pci_chip_rev_id) == ASIC_REV_5704 ||
+            (GET_ASIC_REV(tp->pci_chip_rev_id) == ASIC_REV_5780 &&
+             (tp->tg3_flags2 & TG3_FLG2_MII_SERDES)))
+                return;
+        tg3_writephy(tp, MII_BMCR, BMCR_PDOWN);
+}
+
 static int tg3_set_power_state(struct tg3 *tp, pci_power_t state)
 {
         u32 misc_host_ctrl;
@@ -1327,8 +1340,7 @@ static int tg3_set_power_state(struct tg3 *tp, pci_power_t state)
                         tg3_writephy(tp, MII_TG3_EXT_CTRL,
                                      MII_TG3_EXT_CTRL_FORCE_LED_OFF);
                         tg3_writephy(tp, MII_TG3_AUX_CTRL, 0x01b2);
-                        if (GET_ASIC_REV(tp->pci_chip_rev_id) != ASIC_REV_5700)
-                                tg3_writephy(tp, MII_BMCR, BMCR_PDOWN);
+                        tg3_power_down_phy(tp);
                 }
         }