kernel/drivers/clk/st/clkgen.h

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