sysreset_socfpga.c 1.3 KB

123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657
  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. #include <linux/bitops.h>
  13. struct socfpga_sysreset_data {
  14. void __iomem *rstmgr_base;
  15. };
  16. static int socfpga_sysreset_request(struct udevice *dev,
  17. enum sysreset_t type)
  18. {
  19. struct socfpga_sysreset_data *data = dev_get_priv(dev);
  20. switch (type) {
  21. case SYSRESET_WARM:
  22. writel(BIT(RSTMGR_CTRL_SWWARMRSTREQ_LSB),
  23. data->rstmgr_base + RSTMGR_CTRL);
  24. break;
  25. case SYSRESET_COLD:
  26. writel(BIT(RSTMGR_CTRL_SWCOLDRSTREQ_LSB),
  27. data->rstmgr_base + RSTMGR_CTRL);
  28. break;
  29. default:
  30. return -EPROTONOSUPPORT;
  31. }
  32. return -EINPROGRESS;
  33. }
  34. static int socfpga_sysreset_probe(struct udevice *dev)
  35. {
  36. struct socfpga_sysreset_data *data = dev_get_priv(dev);
  37. data->rstmgr_base = dev_read_addr_ptr(dev);
  38. return 0;
  39. }
  40. static struct sysreset_ops socfpga_sysreset = {
  41. .request = socfpga_sysreset_request,
  42. };
  43. U_BOOT_DRIVER(sysreset_socfpga) = {
  44. .id = UCLASS_SYSRESET,
  45. .name = "socfpga_sysreset",
  46. .priv_auto = sizeof(struct socfpga_sysreset_data),
  47. .ops = &socfpga_sysreset,
  48. .probe = socfpga_sysreset_probe,
  49. };