sysreset_socfpga.c 1.2 KB

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  1. // SPDX-License-Identifier: GPL-2.0
  2. /*
  3. * Copyright (C) 2019 Pepperl+Fuchs
  4. * Simon Goldschmidt <simon.k.r.goldschmidt@gmail.com>
  5. */
  6. #include <common.h>
  7. #include <dm.h>
  8. #include <errno.h>
  9. #include <sysreset.h>
  10. #include <asm/io.h>
  11. #include <asm/arch/reset_manager.h>
  12. struct socfpga_sysreset_data {
  13. void __iomem *rstmgr_base;
  14. };
  15. static int socfpga_sysreset_request(struct udevice *dev,
  16. enum sysreset_t type)
  17. {
  18. struct socfpga_sysreset_data *data = dev_get_priv(dev);
  19. switch (type) {
  20. case SYSRESET_WARM:
  21. writel(BIT(RSTMGR_CTRL_SWWARMRSTREQ_LSB),
  22. data->rstmgr_base + RSTMGR_CTRL);
  23. break;
  24. case SYSRESET_COLD:
  25. writel(BIT(RSTMGR_CTRL_SWCOLDRSTREQ_LSB),
  26. data->rstmgr_base + RSTMGR_CTRL);
  27. break;
  28. default:
  29. return -EPROTONOSUPPORT;
  30. }
  31. return -EINPROGRESS;
  32. }
  33. static int socfpga_sysreset_probe(struct udevice *dev)
  34. {
  35. struct socfpga_sysreset_data *data = dev_get_priv(dev);
  36. data->rstmgr_base = devfdt_get_addr_ptr(dev);
  37. return 0;
  38. }
  39. static struct sysreset_ops socfpga_sysreset = {
  40. .request = socfpga_sysreset_request,
  41. };
  42. U_BOOT_DRIVER(sysreset_socfpga) = {
  43. .id = UCLASS_SYSRESET,
  44. .name = "socfpga_sysreset",
  45. .priv_auto_alloc_size = sizeof(struct socfpga_sysreset_data),
  46. .ops = &socfpga_sysreset,
  47. .probe = socfpga_sysreset_probe,
  48. };