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# Ensure that the MTD is shut down on halt/reboot, otherwise the
# hardware reset hangs
--- linux-2.6.12.2/drivers/mtd/maps/ixp4xx.c.orig 2005-07-17 15:07:47.790388300 -0700
+++ linux-2.6.12.2/drivers/mtd/maps/ixp4xx.c 2005-07-17 17:00:08.082672710 -0700
@@ -144,6 +144,52 @@
return 0;
}
+static void ixp4xx_flash_shutdown(struct device *_dev)
+{
+ struct platform_device *dev = to_platform_device(_dev);
+ struct flash_platform_data *plat = dev->dev.platform_data;
+ struct ixp4xx_flash_info *info = dev_get_drvdata(&dev->dev);
+ map_word d;
+
+ dev_set_drvdata(&dev->dev, NULL);
+
+ if(!info)
+ return;
+
+ /*
+ * This is required for a soft reboot to work.
+ */
+ d.x[0] = 0xff;
+ ixp4xx_write16(&info->map, d, 0x55 * 0x2);
+
+#if 0
+ /* This is commented out because it seems to cause a kernel
+ * panic (at least if it isn't commented out the kernel fails
+ * to shut down). Should be investigated.
+ */
+ if (info->mtd) {
+ del_mtd_partitions(info->mtd);
+ map_destroy(info->mtd);
+ }
+#endif
+ if (info->map.map_priv_1)
+ iounmap((void *) info->map.map_priv_1);
+
+ if (info->partitions)
+ kfree(info->partitions);
+
+ if (info->res) {
+ release_resource(info->res);
+ kfree(info->res);
+ }
+
+ if (plat->exit)
+ plat->exit();
+
+ /* Disable flash write */
+ *IXP4XX_EXP_CS0 &= ~IXP4XX_FLASH_WRITABLE;
+}
+
static int ixp4xx_flash_probe(struct device *_dev)
{
struct platform_device *dev = to_platform_device(_dev);
@@ -243,6 +289,7 @@
.bus = &platform_bus_type,
.probe = ixp4xx_flash_probe,
.remove = ixp4xx_flash_remove,
+ .shutdown = ixp4xx_flash_shutdown,
};
static int __init ixp4xx_flash_init(void)
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