architecture/riscv64/package/u-boot/0008-board-sifive-unmatched-refine-GEMGXL-initialized-fun.patch

   1 From 5f26d71202f37d77ecf74da2ce7e4c3a3f4d48d3 Mon Sep 17 00:00:00 2001
   2 From: Vincent Chen <vincent.chen@sifive.com>
   3 Date: Thu, 8 Jul 2021 09:08:20 +0800
   4 Subject: [PATCH 08/16] board: sifive: unmatched: refine GEMGXL initialized
   5  function in SPL
   6
   7 Create a new function spl_reset_device_by_gpio to reset the device
   8 whose reset pin is connected to the GPIO. Then, using this function
   9 to initialize GEMGXL.
  10
  11 Signed-off-by: Vincent Chen <vincent.chen@sifive.com>
  12 ---
  13  board/sifive/unmatched/spl.c | 58 +++++++++++++++++++++++++++++---------------
  14  1 file changed, 39 insertions(+), 19 deletions(-)
  15
  16 diff --git a/board/sifive/unmatched/spl.c b/board/sifive/unmatched/spl.c
  17 index 5e1333b..b598f9f 100644
  18 --- a/board/sifive/unmatched/spl.c
  19 +++ b/board/sifive/unmatched/spl.c
  20 @@ -22,43 +22,63 @@
  21  #define MODE_SELECT_SD         0xb
  22  #define MODE_SELECT_MASK       GENMASK(3, 0)
  23
  24 -int spl_board_init_f(void)
  25 +static inline int spl_reset_device_by_gpio(const char *label, int pin, int low_width)
  26  {
  27         int ret;
  28
  29 -       ret = spl_soc_init();
  30 +       ret = gpio_request(pin, label);
  31         if (ret) {
  32 -               debug("HiFive Unmatched FU740 SPL init failed: %d\n", ret);
  33 +               debug("%s gpio request failed: %d\n", label, ret);
  34 +               return ret;
  35 +       }
  36 +
  37 +       ret = gpio_direction_output(pin, 1);
  38 +       if (ret) {
  39 +               debug("%s gpio direction set failed: %d\n", label, ret);
  40                 return ret;
  41         }
  42
  43 +       udelay(1);
  44 +
  45 +       gpio_set_value(pin, 0);
  46 +       udelay(low_width);
  47 +       gpio_set_value(pin, 1);
  48 +
  49 +       return ret;
  50 +}
  51 +
  52 +static inline int spl_gemgxl_init(void)
  53 +{
  54 +       int ret;
  55         /*
  56          * GEMGXL init VSC8541 PHY reset sequence;
  57          * leave pull-down active for 2ms
  58          */
  59         udelay(2000);
  60 -       ret = gpio_request(GEM_PHY_RESET, "gem_phy_reset");
  61 +       ret = spl_reset_device_by_gpio("gem_phy_reset", GEM_PHY_RESET, 1);
  62 +       mdelay(15);
  63 +
  64 +       return ret;
  65 +}
  66 +
  67 +int spl_board_init_f(void)
  68 +{
  69 +       int ret;
  70 +
  71 +       ret = spl_soc_init();
  72         if (ret) {
  73 -               debug("gem_phy_reset gpio request failed: %d\n", ret);
  74 -               return ret;
  75 +               debug("HiFive Unmatched FU740 SPL init failed: %d\n", ret);
  76 +               goto end;
  77         }
  78
  79 -       /* Set GPIO 12 (PHY NRESET) */
  80 -       ret = gpio_direction_output(GEM_PHY_RESET, 1);
  81 +       ret = spl_gemgxl_init();
  82         if (ret) {
  83 -               debug("gem_phy_reset gpio direction set failed: %d\n", ret);
  84 -               return ret;
  85 +               debug("Gigabit ethernet PHY (VSC8541) init failed: %d\n", ret);
  86 +               goto end;
  87         }
  88
  89 -       udelay(1);
  90 -
  91 -       /* Reset PHY again to enter unmanaged mode */
  92 -       gpio_set_value(GEM_PHY_RESET, 0);
  93 -       udelay(1);
  94 -       gpio_set_value(GEM_PHY_RESET, 1);
  95 -       mdelay(15);
  96 -
  97 -       return 0;
  98 +end:
  99 +       return ret;
 100  }
 101
 102  u32 spl_boot_device(void)
 103 --
 104 2.7.4
 105