drivers/clk/st/clkgen.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 /************************************************************************
   3 File  : Clock H/w specific Information
   4
   5 Author: Pankaj Dev <pankaj.dev@st.com>
   6
   7 Copyright (C) 2014 STMicroelectronics
   8 ************************************************************************/
   9
  10 #ifndef __CLKGEN_INFO_H
  11 #define __CLKGEN_INFO_H
  12
  13 extern spinlock_t clkgen_a9_lock;
  14
  15 struct clkgen_field {
  16         unsigned int offset;
  17         unsigned int mask;
  18         unsigned int shift;
  19 };
  20
  21 static inline unsigned long clkgen_read(void __iomem    *base,
  22                                           struct clkgen_field *field)
  23 {
  24         return (readl(base + field->offset) >> field->shift) & field->mask;
  25 }
  26
  27
  28 static inline void clkgen_write(void __iomem *base, struct clkgen_field *field,
  29                                   unsigned long val)
  30 {
  31         writel((readl(base + field->offset) &
  32                ~(field->mask << field->shift)) | (val << field->shift),
  33                base + field->offset);
  34
  35         return;
  36 }
  37
  38 #define CLKGEN_FIELD(_offset, _mask, _shift) {          \
  39                                 .offset = _offset,      \
  40                                 .mask   = _mask,        \
  41                                 .shift  = _shift,       \
  42                                 }
  43
  44 #define CLKGEN_READ(pll, field) clkgen_read(pll->regs_base, \
  45                 &pll->data->field)
  46
  47 #define CLKGEN_WRITE(pll, field, val) clkgen_write(pll->regs_base, \
  48                 &pll->data->field, val)
  49
  50 #endif /*__CLKGEN_INFO_H*/
  51