drivers/sysreset/sysreset_rv1108.c

   1 /*
   2  * (C) Copyright 2015 Rockchip Electronics Co., Ltd
   3  * Author: Andy Yan <andy.yan@rock-chips.com>
   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_rv1108.h>
  14 #include <asm/arch/hardware.h>
  15 #include <linux/err.h>
  16
  17 int rv1108_sysreset_request(struct udevice *dev, enum sysreset_t type)
  18 {
  19         struct rv1108_cru *cru = rockchip_get_cru();
  20
  21         if (IS_ERR(cru))
  22                 return PTR_ERR(cru);
  23
  24         switch (type) {
  25         case SYSRESET_WARM:
  26                 writel(0xeca8, &cru->glb_srst_snd_val);
  27                 break;
  28         case SYSRESET_COLD:
  29                 writel(0xfdb9, &cru->glb_srst_fst_val);
  30                 break;
  31         default:
  32                 return -EPROTONOSUPPORT;
  33         }
  34
  35         return -EINPROGRESS;
  36 }
  37
  38 static struct sysreset_ops rv1108_sysreset = {
  39         .request        = rv1108_sysreset_request,
  40 };
  41
  42 U_BOOT_DRIVER(sysreset_rv1108) = {
  43         .name   = "rv1108_sysreset",
  44         .id     = UCLASS_SYSRESET,
  45         .ops    = &rv1108_sysreset,
  46 };