drivers/serial/serial_omap.c

   1 /*
   2  * Copyright (c) 2014 Google, Inc
   3  *
   4  * SPDX-License-Identifier:     GPL-2.0+
   5  */
   6
   7 #include <common.h>
   8 #include <dm.h>
   9 #include <fdtdec.h>
  10 #include <ns16550.h>
  11 #include <serial.h>
  12
  13 DECLARE_GLOBAL_DATA_PTR;
  14
  15 #define DEFAULT_CLK_SPEED 48000000 /* 48Mhz */
  16
  17 #if CONFIG_IS_ENABLED(OF_CONTROL)
  18 static const struct udevice_id omap_serial_ids[] = {
  19         { .compatible = "ti,omap3-uart" },
  20         { .compatible = "ti,omap4-uart" },
  21         { }
  22 };
  23
  24 static int omap_serial_ofdata_to_platdata(struct udevice *dev)
  25 {
  26         struct ns16550_platdata *plat = dev_get_platdata(dev);
  27         int ret;
  28
  29         ret = ns16550_serial_ofdata_to_platdata(dev);
  30         if (ret)
  31                 return ret;
  32         plat->clock = fdtdec_get_int(gd->fdt_blob, dev->of_offset,
  33                                      "clock-frequency", DEFAULT_CLK_SPEED);
  34         plat->reg_shift = 2;
  35
  36         return 0;
  37 }
  38 #endif
  39
  40 U_BOOT_DRIVER(serial_omap_ns16550) = {
  41         .name   = "serial_omap",
  42         .id     = UCLASS_SERIAL,
  43         .of_match = of_match_ptr(omap_serial_ids),
  44         .ofdata_to_platdata = of_match_ptr(omap_serial_ofdata_to_platdata),
  45         .platdata_auto_alloc_size = sizeof(struct ns16550_platdata),
  46         .priv_auto_alloc_size = sizeof(struct NS16550),
  47         .probe = ns16550_serial_probe,
  48         .ops    = &ns16550_serial_ops,
  49         .flags  = DM_FLAG_PRE_RELOC,
  50 };