LXR uboot/drivers/sysreset/sysreset

   1// SPDX-License-Identifier: GPL-2.0
   2/*
   3 * (C) Copyright 2016 Google, Inc
   4 */
   5
   6#include <common.h>
   7#include <dm.h>
   8#include <errno.h>
   9#include <log.h>
  10#include <sysreset.h>
  11#include <wdt.h>
  12#include <asm/io.h>
  13#include <asm/arch/wdt.h>
  14#include <linux/err.h>
  15#include <hang.h>
  16
  17static int ast_sysreset_request(struct udevice *dev, enum sysreset_t type)
  18{
  19        struct udevice *wdt;
  20        u32 reset_mode;
  21        int ret = uclass_first_device(UCLASS_WDT, &wdt);
  22
  23        if (ret)
  24                return ret;
  25
  26        switch (type) {
  27        case SYSRESET_WARM:
  28                reset_mode = WDT_CTRL_RESET_CPU;
  29                break;
  30        case SYSRESET_COLD:
  31                reset_mode = WDT_CTRL_RESET_CHIP;
  32                break;
  33        default:
  34                return -EPROTONOSUPPORT;
  35        }
  36
  37#if !defined(CONFIG_SPL_BUILD)
  38        ret = wdt_expire_now(wdt, reset_mode);
  39        if (ret) {
  40                debug("Sysreset failed: %d", ret);
  41                return ret;
  42        }
  43#else
  44        hang();
  45#endif
  46
  47        return -EINPROGRESS;
  48}
  49
  50static struct sysreset_ops ast_sysreset = {
  51        .request        = ast_sysreset_request,
  52};
  53
  54U_BOOT_DRIVER(sysreset_ast) = {
  55        .name   = "ast_sysreset",
  56        .id     = UCLASS_SYSRESET,
  57        .ops    = &ast_sysreset,
  58};
  59