Chromium: arm: tegra: Add NAND support

drivers/mtd/nand/nand_base.c

 /*
  *  drivers/mtd/nand.c
  *
  *  Overview:
  *   This is the generic MTD driver for NAND flash devices. It should be
  *   capable of working with almost all NAND chips currently available.
  *   Basic support for AG-AND chips is provided.
  *
  *      Additional technical information is available on
  *      http://www.linux-mtd.infradead.org/doc/nand.html
@@ skipping 2929 matching lines @@
                 chip->ecc.write_page = nand_write_page_swecc;
                 chip->ecc.read_page_raw = nand_read_page_raw;
                 chip->ecc.write_page_raw = nand_write_page_raw;
                 chip->ecc.read_oob = nand_read_oob_std;
                 chip->ecc.write_oob = nand_write_oob_std;
                 chip->ecc.size = 256;
                 chip->ecc.bytes = 3;
                 break;
 
         case NAND_ECC_NONE:
+#ifndef CONFIG_NAND_TEGRA2 

[Tom Warren, 2011/03/08 20:43:08]

Are we using NAND_ECC_NONE? If so, why, if it's not recommended?

                 printk(KERN_WARNING "NAND_ECC_NONE selected by board driver. "
                        "This is not recommended !!\n");
+#endif
                 chip->ecc.read_page = nand_read_page_raw;
                 chip->ecc.write_page = nand_write_page_raw;
                 chip->ecc.read_oob = nand_read_oob_std;
                 chip->ecc.read_page_raw = nand_read_page_raw;
                 chip->ecc.write_page_raw = nand_write_page_raw;
                 chip->ecc.write_oob = nand_write_oob_std;
                 chip->ecc.size = mtd->writesize;
                 chip->ecc.bytes = 0;
                 break;
 
@@ skipping 164 matching lines @@
         led_trigger_unregister_simple(nand_led_trigger);
 }
 
 module_init(nand_base_init);
 module_exit(nand_base_exit);
 
 MODULE_LICENSE("GPL");
 MODULE_AUTHOR("Steven J. Hill <sjhill@realitydiluted.com>, Thomas Gleixner <tglx@linutronix.de>");
 MODULE_DESCRIPTION("Generic NAND flash driver code");
 #endif