org.handhelds.familiar/packages/linux/openslug-kernel-2.6.11.2/mtd-shutdown.patch

   1 # Ensure that the MTD is shut down on halt/reboot, otherwise the
   2 # hardware reset hangs
   3
   4 --- linux-2.6.12.2/drivers/mtd/maps/ixp4xx.c.orig       2005-07-17 15:07:47.790388300 -0700
   5 +++ linux-2.6.12.2/drivers/mtd/maps/ixp4xx.c    2005-07-17 17:00:08.082672710 -0700
   6 @@ -144,6 +144,52 @@
   7         return 0;
   8  }
   9
  10 +static void ixp4xx_flash_shutdown(struct device *_dev)
  11 +{
  12 +       struct platform_device *dev = to_platform_device(_dev);
  13 +       struct flash_platform_data *plat = dev->dev.platform_data;
  14 +       struct ixp4xx_flash_info *info = dev_get_drvdata(&dev->dev);
  15 +       map_word d;
  16 +
  17 +       dev_set_drvdata(&dev->dev, NULL);
  18 +
  19 +       if(!info)
  20 +               return;
  21 +
  22 +       /*
  23 +        * This is required for a soft reboot to work.
  24 +        */
  25 +       d.x[0] = 0xff;
  26 +       ixp4xx_write16(&info->map, d, 0x55 * 0x2);
  27 +
  28 +#if 0
  29 +       /* This is commented out because it seems to cause a kernel
  30 +        * panic (at least if it isn't commented out the kernel fails
  31 +        * to shut down).  Should be investigated.
  32 +        */
  33 +       if (info->mtd) {
  34 +               del_mtd_partitions(info->mtd);
  35 +               map_destroy(info->mtd);
  36 +       }
  37 +#endif
  38 +       if (info->map.map_priv_1)
  39 +               iounmap((void *) info->map.map_priv_1);
  40 +
  41 +       if (info->partitions)
  42 +               kfree(info->partitions);
  43 +
  44 +       if (info->res) {
  45 +               release_resource(info->res);
  46 +               kfree(info->res);
  47 +       }
  48 +
  49 +       if (plat->exit)
  50 +               plat->exit();
  51 +
  52 +       /* Disable flash write */
  53 +       *IXP4XX_EXP_CS0 &= ~IXP4XX_FLASH_WRITABLE;
  54 +}
  55 +
  56  static int ixp4xx_flash_probe(struct device *_dev)
  57  {
  58         struct platform_device *dev = to_platform_device(_dev);
  59 @@ -243,6 +289,7 @@
  60         .bus            = &platform_bus_type,
  61         .probe          = ixp4xx_flash_probe,
  62         .remove         = ixp4xx_flash_remove,
  63 +       .shutdown       = ixp4xx_flash_shutdown,
  64  };
  65
  66  static int __init ixp4xx_flash_init(void)