diff options
Diffstat (limited to 'packages/linux/nslu2-kernel/2.6/40-mtd-shutdown.patch')
| -rw-r--r-- | packages/linux/nslu2-kernel/2.6/40-mtd-shutdown.patch | 66 |
1 files changed, 66 insertions, 0 deletions
diff --git a/packages/linux/nslu2-kernel/2.6/40-mtd-shutdown.patch b/packages/linux/nslu2-kernel/2.6/40-mtd-shutdown.patch new file mode 100644 index 0000000000..e7cce4ebc0 --- /dev/null +++ b/packages/linux/nslu2-kernel/2.6/40-mtd-shutdown.patch @@ -0,0 +1,66 @@ +# 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) |