[TG3]: Add GPIO3 for 5752

Add bit definitions for the new GPIO3 in 5752. GPIO3 must be driven as
output when it is unused.

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

2 files changed, 13 insertions, 0 deletions

diff --git a/drivers/net/tg3.c b/drivers/net/tg3.c
index a4d0d61d6af0..a94631af21cd 100644
--- a/drivers/net/tg3.c
+++ b/drivers/net/tg3.c
@@ -5353,6 +5353,11 @@ static int tg3_reset_hw(struct tg3 *tp)
 
                 gpio_mask = GRC_LCLCTRL_GPIO_OE0 | GRC_LCLCTRL_GPIO_OE2 |
                             GRC_LCLCTRL_GPIO_OUTPUT0 | GRC_LCLCTRL_GPIO_OUTPUT2;
+
+                if (GET_ASIC_REV(tp->pci_chip_rev_id) == ASIC_REV_5752)
+                        gpio_mask |= GRC_LCLCTRL_GPIO_OE3 |
+                                     GRC_LCLCTRL_GPIO_OUTPUT3;
+
                 tp->grc_local_ctrl |= tr32(GRC_LOCAL_CTRL) & gpio_mask;
 
                 /* GPIO1 must be driven high for eeprom write protect */
@@ -8077,6 +8082,11 @@ static int __devinit tg3_get_invariants(struct tg3 *tp)
             (tp->tg3_flags & TG3_FLAG_EEPROM_WRITE_PROT))
                 tp->grc_local_ctrl |= (GRC_LCLCTRL_GPIO_OE1 |
                                        GRC_LCLCTRL_GPIO_OUTPUT1);
+        /* Unused GPIO3 must be driven as output on 5752 because there
+         * are no pull-up resistors on unused GPIO pins.
+         */
+        else if (GET_ASIC_REV(tp->pci_chip_rev_id) == ASIC_REV_5752)
+                tp->grc_local_ctrl |= GRC_LCLCTRL_GPIO_OE3;
 
         /* Force the chip into D0. */
         err = tg3_set_power_state(tp, 0);
diff --git a/drivers/net/tg3.h b/drivers/net/tg3.h
index 3f7cd6fb8891..548f469e9500 100644
--- a/drivers/net/tg3.h
+++ b/drivers/net/tg3.h
@@ -1311,6 +1311,9 @@
 #define  GRC_LCLCTRL_CLEARINT           0x00000002
 #define  GRC_LCLCTRL_SETINT             0x00000004
 #define  GRC_LCLCTRL_INT_ON_ATTN        0x00000008
+#define  GRC_LCLCTRL_GPIO_INPUT3        0x00000020
+#define  GRC_LCLCTRL_GPIO_OE3           0x00000040
+#define  GRC_LCLCTRL_GPIO_OUTPUT3       0x00000080
 #define  GRC_LCLCTRL_GPIO_INPUT0        0x00000100
 #define  GRC_LCLCTRL_GPIO_INPUT1        0x00000200
 #define  GRC_LCLCTRL_GPIO_INPUT2        0x00000400