drivers/clk/at91/pmc.c

   1 /*
   2  *  Copyright (C) 2013 Boris BREZILLON <b.brezillon@overkiz.com>
   3  *
   4  * This program is free software; you can redistribute it and/or modify
   5  * it under the terms of the GNU General Public License as published by
   6  * the Free Software Foundation; either version 2 of the License, or
   7  * (at your option) any later version.
   8  *
   9  */
  10
  11 #include <linux/clk-provider.h>
  12 #include <linux/clkdev.h>
  13 #include <linux/clk/at91_pmc.h>
  14 #include <linux/of.h>
  15 #include <linux/mfd/syscon.h>
  16 #include <linux/regmap.h>
  17
  18 #include <asm/proc-fns.h>
  19
  20 #include "pmc.h"
  21
  22 int of_at91_get_clk_range(struct device_node *np, const char *propname,
  23                           struct clk_range *range)
  24 {
  25         u32 min, max;
  26         int ret;
  27
  28         ret = of_property_read_u32_index(np, propname, 0, &min);
  29         if (ret)
  30                 return ret;
  31
  32         ret = of_property_read_u32_index(np, propname, 1, &max);
  33         if (ret)
  34                 return ret;
  35
  36         if (range) {
  37                 range->min = min;
  38                 range->max = max;
  39         }
  40
  41         return 0;
  42 }
  43 EXPORT_SYMBOL_GPL(of_at91_get_clk_range);