smsc95xx: configure LED outputs

SMSC LAN9500 has dual purpose GPIO/LED pins, and by default at power-on
these are configured as GPIOs.  This means that if LEDs are fitted they
won't ever light.

This patch sets them to be LED outputs for speed, duplex and
link/activity.

Signed-off-by: Steve Glendinning <steve.glendinning@smsc.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

2 files changed, 13 insertions, 0 deletions

diff --git a/drivers/net/usb/smsc95xx.c b/drivers/net/usb/smsc95xx.c
index dc1665326592..0fd68a5f9d49 100644
--- a/drivers/net/usb/smsc95xx.c
+++ b/drivers/net/usb/smsc95xx.c
@@ -941,6 +941,16 @@ static int smsc95xx_reset(struct usbnet *dev)
         if (netif_msg_ifup(dev))
                 devdbg(dev, "ID_REV = 0x%08x", read_buf);
 
+        /* Configure GPIO pins as LED outputs */
+        write_buf = LED_GPIO_CFG_SPD_LED | LED_GPIO_CFG_LNK_LED |
+                LED_GPIO_CFG_FDX_LED;
+        ret = smsc95xx_write_reg(dev, LED_GPIO_CFG, write_buf);
+        if (ret < 0) {
+                devwarn(dev, "Failed to write LED_GPIO_CFG register, ret=%d",
+                        ret);
+                return ret;
+        }
+
         /* Init Tx */
         write_buf = 0;
         ret = smsc95xx_write_reg(dev, FLOW, write_buf);
diff --git a/drivers/net/usb/smsc95xx.h b/drivers/net/usb/smsc95xx.h
index 66b5c84f302e..86bc44977fbd 100644
--- a/drivers/net/usb/smsc95xx.h
+++ b/drivers/net/usb/smsc95xx.h
@@ -99,6 +99,9 @@
 #define PM_CTL_WUPS_MULTI_              (0x00000003)
 
 #define LED_GPIO_CFG                    (0x24)
+#define LED_GPIO_CFG_SPD_LED            (0x01000000)
+#define LED_GPIO_CFG_LNK_LED            (0x00100000)
+#define LED_GPIO_CFG_FDX_LED            (0x00010000)
 
 #define GPIO_CFG                        (0x28)