drivers/sysreset/sysreset_rockchip.c

   1 /*
   2  * (C) Copyright 2017 Rockchip Electronics Co., Ltd
   3  *
   4  * SPDX-License-Identifier:     GPL-2.0
   5  */
   6
   7 #include <common.h>
   8 #include <dm.h>
   9 #include <errno.h>
  10 #include <sysreset.h>
  11 #include <asm/io.h>
  12 #include <asm/arch/clock.h>
  13 #include <asm/arch/cru_rk3328.h>
  14 #include <asm/arch/hardware.h>
  15 #include <linux/err.h>
  16
  17 int rockchip_sysreset_request(struct udevice *dev, enum sysreset_t type)
  18 {
  19         struct sysreset_reg *offset = dev_get_priv(dev);
  20         unsigned long cru_base = (unsigned long)rockchip_get_cru();
  21
  22         if (IS_ERR_VALUE(cru_base))
  23                 return (int)cru_base;
  24
  25         switch (type) {
  26         case SYSRESET_WARM:
  27                 writel(0xeca8, cru_base + offset->glb_srst_snd_value);
  28                 break;
  29         case SYSRESET_COLD:
  30                 writel(0xfdb9, cru_base + offset->glb_srst_fst_value);
  31                 break;
  32         default:
  33                 return -EPROTONOSUPPORT;
  34         }
  35
  36         return -EINPROGRESS;
  37 }
  38
  39 static struct sysreset_ops rockchip_sysreset = {
  40         .request        = rockchip_sysreset_request,
  41 };
  42
  43 U_BOOT_DRIVER(sysreset_rockchip) = {
  44         .name   = "rockchip_sysreset",
  45         .id     = UCLASS_SYSRESET,
  46         .ops    = &rockchip_sysreset,
  47 };