target/linux/bcm27xx/patches-5.4/950-0030-lan78xx-Enable-LEDs-and-auto-negotiation.patch

   1 From e91aa9302b0d3f9730983d0f1b168a081aab6236 Mon Sep 17 00:00:00 2001
   2 From: Phil Elwell <phil@raspberrypi.org>
   3 Date: Tue, 17 Oct 2017 15:04:29 +0100
   4 Subject: [PATCH] lan78xx: Enable LEDs and auto-negotiation
   5
   6 For applications of the LAN78xx that don't have valid programmed
   7 EEPROMs or OTPs, enabling both LEDs and auto-negotiation by default
   8 seems reasonable.
   9
  10 Signed-off-by: Phil Elwell <phil@raspberrypi.org>
  11 ---
  12  drivers/net/usb/lan78xx.c | 11 +++++++++++
  13  1 file changed, 11 insertions(+)
  14
  15 --- a/drivers/net/usb/lan78xx.c
  16 +++ b/drivers/net/usb/lan78xx.c
  17 @@ -2465,6 +2465,11 @@ static int lan78xx_reset(struct lan78xx_
  18         int ret = 0;
  19         unsigned long timeout;
  20         u8 sig;
  21 +       bool has_eeprom;
  22 +       bool has_otp;
  23 +
  24 +       has_eeprom = !lan78xx_read_eeprom(dev, 0, 0, NULL);
  25 +       has_otp = !lan78xx_read_otp(dev, 0, 0, NULL);
  26
  27         ret = lan78xx_read_reg(dev, HW_CFG, &buf);
  28         buf |= HW_CFG_LRST_;
  29 @@ -2518,6 +2523,9 @@ static int lan78xx_reset(struct lan78xx_
  30
  31         ret = lan78xx_read_reg(dev, HW_CFG, &buf);
  32         buf |= HW_CFG_MEF_;
  33 +       /* If no valid EEPROM and no valid OTP, enable the LEDs by default */
  34 +       if (!has_eeprom && !has_otp)
  35 +           buf |= HW_CFG_LED0_EN_ | HW_CFG_LED1_EN_;
  36         ret = lan78xx_write_reg(dev, HW_CFG, buf);
  37
  38         ret = lan78xx_read_reg(dev, USB_CFG0, &buf);
  39 @@ -2573,6 +2581,9 @@ static int lan78xx_reset(struct lan78xx_
  40                         buf |= MAC_CR_AUTO_DUPLEX_ | MAC_CR_AUTO_SPEED_;
  41                 }
  42         }
  43 +       /* If no valid EEPROM and no valid OTP, enable AUTO negotiation */
  44 +       if (!has_eeprom && !has_otp)
  45 +           buf |= MAC_CR_AUTO_DUPLEX_ | MAC_CR_AUTO_SPEED_;
  46         ret = lan78xx_write_reg(dev, MAC_CR, buf);
  47
  48         ret = lan78xx_read_reg(dev, MAC_TX, &buf);