arch/arm/mach-omap1/flash.c

   1 /*
   2  * Flash support for OMAP1
   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 version 2 as
   6  * published by the Free Software Foundation.
   7  */
   8
   9 #include <linux/mtd/mtd.h>
  10 #include <linux/mtd/map.h>
  11
  12 #include <plat/io.h>
  13 #include <plat/tc.h>
  14 #include <plat/flash.h>
  15
  16 void omap1_set_vpp(struct map_info *map, int enable)
  17 {
  18         static int count;
  19         u32 l;
  20
  21         if (enable) {
  22                 if (count++ == 0) {
  23                         l = omap_readl(EMIFS_CONFIG);
  24                         l |= OMAP_EMIFS_CONFIG_WP;
  25                         omap_writel(l, EMIFS_CONFIG);
  26                 }
  27         } else {
  28                 if (count && (--count == 0)) {
  29                         l = omap_readl(EMIFS_CONFIG);
  30                         l &= ~OMAP_EMIFS_CONFIG_WP;
  31                         omap_writel(l, EMIFS_CONFIG);
  32                 }
  33         }
  34 }