target/linux/bcm27xx/patches-5.15/950-0055-lan78xx-Enable-LEDs-and-auto-negotiation.patch

   1 From ec6fe1f3510a68ea742758b1cd806a5a08fed7ae 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 | 12 ++++++++++++
  13  1 file changed, 12 insertions(+)
  14
  15 --- a/drivers/net/usb/lan78xx.c
  16 +++ b/drivers/net/usb/lan78xx.c
  17 @@ -2716,6 +2716,11 @@ static int lan78xx_reset(struct lan78xx_
  18         int ret;
  19         u32 buf;
  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         if (ret < 0)
  29 @@ -2797,6 +2802,10 @@ static int lan78xx_reset(struct lan78xx_
  30
  31         buf |= HW_CFG_MEF_;
  32
  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 +
  37         ret = lan78xx_write_reg(dev, HW_CFG, buf);
  38         if (ret < 0)
  39                 return ret;
  40 @@ -2895,6 +2904,9 @@ static int lan78xx_reset(struct lan78xx_
  41                         buf |= MAC_CR_AUTO_DUPLEX_ | MAC_CR_AUTO_SPEED_;
  42                 }
  43         }
  44 +       /* If no valid EEPROM and no valid OTP, enable AUTO negotiation */
  45 +       if (!has_eeprom && !has_otp)
  46 +           buf |= MAC_CR_AUTO_DUPLEX_ | MAC_CR_AUTO_SPEED_;
  47         ret = lan78xx_write_reg(dev, MAC_CR, buf);
  48         if (ret < 0)
  49                 return ret;