arch/arm/mach-snapdragon/reset.c

   1 /*
   2  * Qualcomm APQ8016 reset controller driver
   3  *
   4  * (C) Copyright 2015 Mateusz Kulikowski <mateusz.kulikowski@gmail.com>
   5  *
   6  * SPDX-License-Identifier:     GPL-2.0+
   7  */
   8
   9 #include <common.h>
  10 #include <dm.h>
  11 #include <errno.h>
  12 #include <sysreset.h>
  13 #include <asm/io.h>
  14
  15 DECLARE_GLOBAL_DATA_PTR;
  16
  17 static int msm_sysreset_request(struct udevice *dev, enum sysreset_t type)
  18 {
  19         phys_addr_t addr = dev_get_addr(dev);
  20         if (!addr)
  21                 return -EINVAL;
  22         writel(0, addr);
  23         return -EINPROGRESS;
  24 }
  25
  26 static struct sysreset_ops msm_sysreset_ops = {
  27         .request        = msm_sysreset_request,
  28 };
  29
  30 static const struct udevice_id msm_sysreset_ids[] = {
  31         { .compatible = "qcom,pshold" },
  32         { }
  33 };
  34
  35 U_BOOT_DRIVER(msm_reset) = {
  36         .name           = "msm_sysreset",
  37         .id             = UCLASS_SYSRESET,
  38         .of_match       = msm_sysreset_ids,
  39         .ops            = &msm_sysreset_ops,
  40 };