clkgen.h 1.2 KB

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  1. /* SPDX-License-Identifier: GPL-2.0 */
  2. /************************************************************************
  3. File : Clock H/w specific Information
  4. Author: Pankaj Dev <pankaj.dev@st.com>
  5. Copyright (C) 2014 STMicroelectronics
  6. ************************************************************************/
  7. #ifndef __CLKGEN_INFO_H
  8. #define __CLKGEN_INFO_H
  9. extern spinlock_t clkgen_a9_lock;
  10. struct clkgen_field {
  11. unsigned int offset;
  12. unsigned int mask;
  13. unsigned int shift;
  14. };
  15. static inline unsigned long clkgen_read(void __iomem *base,
  16. struct clkgen_field *field)
  17. {
  18. return (readl(base + field->offset) >> field->shift) & field->mask;
  19. }
  20. static inline void clkgen_write(void __iomem *base, struct clkgen_field *field,
  21. unsigned long val)
  22. {
  23. writel((readl(base + field->offset) &
  24. ~(field->mask << field->shift)) | (val << field->shift),
  25. base + field->offset);
  26. return;
  27. }
  28. #define CLKGEN_FIELD(_offset, _mask, _shift) { \
  29. .offset = _offset, \
  30. .mask = _mask, \
  31. .shift = _shift, \
  32. }
  33. #define CLKGEN_READ(pll, field) clkgen_read(pll->regs_base, \
  34. &pll->data->field)
  35. #define CLKGEN_WRITE(pll, field, val) clkgen_write(pll->regs_base, \
  36. &pll->data->field, val)
  37. #endif /*__CLKGEN_INFO_H*/