drivers/clk/at91/pmc.c

   1 /*
   2  * Copyright (C) 2016 Atmel Corporation
   3  *               Wenyou.Yang <wenyou.yang@atmel.com>
   4  *
   5  * SPDX-License-Identifier:     GPL-2.0+
   6  */
   7
   8 #include <common.h>
   9 #include <clk-uclass.h>
  10 #include <dm/device.h>
  11 #include <dm/lists.h>
  12 #include <dm/root.h>
  13 #include "pmc.h"
  14
  15 DECLARE_GLOBAL_DATA_PTR;
  16
  17 static int at91_pmc_bind(struct udevice *dev)
  18 {
  19         return dm_scan_fdt_node(dev, gd->fdt_blob, dev->of_offset, false);
  20 }
  21
  22 static const struct udevice_id at91_pmc_match[] = {
  23         { .compatible = "atmel,sama5d2-pmc" },
  24         {}
  25 };
  26
  27 U_BOOT_DRIVER(at91_pmc) = {
  28         .name = "at91-pmc-core",
  29         .id = UCLASS_CLK,
  30         .of_match = at91_pmc_match,
  31         .bind = at91_pmc_bind,
  32 };
  33
  34 int at91_pmc_core_probe(struct udevice *dev)
  35 {
  36         struct pmc_platdata *plat = dev_get_platdata(dev);
  37
  38         dev = dev_get_parent(dev);
  39
  40         plat->reg_base = (struct at91_pmc *)dev_get_addr_ptr(dev);
  41
  42         return 0;
  43 }
  44
  45 int at91_pmc_clk_node_bind(struct udevice *dev)
  46 {
  47         const void *fdt = gd->fdt_blob;
  48         int offset = dev->of_offset;
  49         const char *name;
  50         int ret;
  51
  52         for (offset = fdt_first_subnode(fdt, offset);
  53              offset > 0;
  54              offset = fdt_next_subnode(fdt, offset)) {
  55                 name = fdt_get_name(fdt, offset, NULL);
  56                 if (!name)
  57                         return -EINVAL;
  58
  59                 ret = device_bind_driver_to_node(dev, "clk", name,
  60                                                  offset, NULL);
  61                 if (ret)
  62                         return ret;
  63         }
  64
  65         return 0;
  66 }
  67
  68 U_BOOT_DRIVER(clk_generic) = {
  69         .id     = UCLASS_CLK,
  70         .name   = "clk",
  71 };