arch/arm/mach-rockchip/rk3288/reset_rk3288.c

   1 /*
   2  * (C) Copyright 2015 Google, Inc
   3  *
   4  * SPDX-License-Identifier:     GPL-2.0
   5  */
   6
   7 #include <common.h>
   8 #include <dm.h>
   9 #include <errno.h>
  10 #include <reset.h>
  11 #include <asm/io.h>
  12 #include <asm/arch/clock.h>
  13 #include <asm/arch/cru_rk3288.h>
  14 #include <asm/arch/hardware.h>
  15 #include <linux/err.h>
  16
  17 int rk3288_reset_request(struct udevice *dev, enum reset_t type)
  18 {
  19         struct rk3288_cru *cru = rockchip_get_cru();
  20
  21         if (IS_ERR(cru))
  22                 return PTR_ERR(cru);
  23         switch (type) {
  24         case RESET_WARM:
  25                 rk_clrreg(&cru->cru_mode_con, 0xffff);
  26                 writel(0xeca8, &cru->cru_glb_srst_snd_value);
  27                 break;
  28         case RESET_COLD:
  29                 rk_clrreg(&cru->cru_mode_con, 0xffff);
  30                 writel(0xfdb9, &cru->cru_glb_srst_fst_value);
  31                 break;
  32         default:
  33                 return -EPROTONOSUPPORT;
  34         }
  35
  36         return -EINPROGRESS;
  37 }
  38
  39 static struct reset_ops rk3288_reset = {
  40         .request        = rk3288_reset_request,
  41 };
  42
  43 U_BOOT_DRIVER(reset_rk3288) = {
  44         .name   = "rk3288_reset",
  45         .id     = UCLASS_RESET,
  46         .ops    = &rk3288_reset,
  47 };