LXR linux/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
  16void omap1_set_vpp(struct platform_device *pdev, 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}
  35