drivers/clk/at91/pmc.h

   1 /*
   2  * drivers/clk/at91/pmc.h
   3  *
   4  *  Copyright (C) 2013 Boris BREZILLON <b.brezillon@overkiz.com>
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation; either version 2 of the License, or
   9  * (at your option) any later version.
  10  */
  11
  12 #ifndef __PMC_H_
  13 #define __PMC_H_
  14
  15 #include <linux/io.h>
  16 #include <linux/irqdomain.h>
  17 #include <linux/spinlock.h>
  18
  19 struct clk_range {
  20         unsigned long min;
  21         unsigned long max;
  22 };
  23
  24 #define CLK_RANGE(MIN, MAX) {.min = MIN, .max = MAX,}
  25
  26 struct at91_pmc_caps {
  27         u32 available_irqs;
  28 };
  29
  30 struct at91_pmc {
  31         void __iomem *regbase;
  32         int virq;
  33         spinlock_t lock;
  34         const struct at91_pmc_caps *caps;
  35         struct irq_domain *irqdomain;
  36 };
  37
  38 static inline void pmc_lock(struct at91_pmc *pmc)
  39 {
  40         spin_lock(&pmc->lock);
  41 }
  42
  43 static inline void pmc_unlock(struct at91_pmc *pmc)
  44 {
  45         spin_unlock(&pmc->lock);
  46 }
  47
  48 static inline u32 pmc_read(struct at91_pmc *pmc, int offset)
  49 {
  50         return readl(pmc->regbase + offset);
  51 }
  52
  53 static inline void pmc_write(struct at91_pmc *pmc, int offset, u32 value)
  54 {
  55         writel(value, pmc->regbase + offset);
  56 }
  57
  58 int of_at91_get_clk_range(struct device_node *np, const char *propname,
  59                           struct clk_range *range);
  60
  61 #endif /* __PMC_H_ */