clk_bcm6345.c 1.4 KB

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  1. // SPDX-License-Identifier: GPL-2.0+
  2. /*
  3. * Copyright (C) 2017 Álvaro Fernández Rojas <noltari@gmail.com>
  4. *
  5. * Derived from linux/arch/mips/bcm63xx/clk.c:
  6. * Copyright (C) 2008 Maxime Bizon <mbizon@freebox.fr>
  7. */
  8. #include <common.h>
  9. #include <clk-uclass.h>
  10. #include <dm.h>
  11. #include <errno.h>
  12. #include <asm/io.h>
  13. #include <linux/bitops.h>
  14. #define MAX_CLKS 32
  15. struct bcm6345_clk_priv {
  16. void __iomem *regs;
  17. };
  18. static int bcm6345_clk_enable(struct clk *clk)
  19. {
  20. struct bcm6345_clk_priv *priv = dev_get_priv(clk->dev);
  21. if (clk->id >= MAX_CLKS)
  22. return -EINVAL;
  23. setbits_be32(priv->regs, BIT(clk->id));
  24. return 0;
  25. }
  26. static int bcm6345_clk_disable(struct clk *clk)
  27. {
  28. struct bcm6345_clk_priv *priv = dev_get_priv(clk->dev);
  29. if (clk->id >= MAX_CLKS)
  30. return -EINVAL;
  31. clrbits_be32(priv->regs, BIT(clk->id));
  32. return 0;
  33. }
  34. static struct clk_ops bcm6345_clk_ops = {
  35. .disable = bcm6345_clk_disable,
  36. .enable = bcm6345_clk_enable,
  37. };
  38. static const struct udevice_id bcm6345_clk_ids[] = {
  39. { .compatible = "brcm,bcm6345-clk" },
  40. { /* sentinel */ }
  41. };
  42. static int bcm63xx_clk_probe(struct udevice *dev)
  43. {
  44. struct bcm6345_clk_priv *priv = dev_get_priv(dev);
  45. priv->regs = dev_remap_addr(dev);
  46. if (!priv->regs)
  47. return -EINVAL;
  48. return 0;
  49. }
  50. U_BOOT_DRIVER(clk_bcm6345) = {
  51. .name = "clk_bcm6345",
  52. .id = UCLASS_CLK,
  53. .of_match = bcm6345_clk_ids,
  54. .ops = &bcm6345_clk_ops,
  55. .probe = bcm63xx_clk_probe,
  56. .priv_auto_alloc_size = sizeof(struct bcm6345_clk_priv),
  57. };