[kernel] add a chip_fixup function to the plat_nand driver

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@11375 3c298f89-4303-0410-b956-a3cf2f4a3e73

target/linux/generic-2.6/patches-2.6.24/080-mtd_plat_nand_chip_fixup.patch

+--- a/include/linux/mtd/nand.h
++++ b/include/linux/mtd/nand.h
+@@ -573,6 +573,7 @@
+ 	int			chip_delay;
+ 	unsigned int		options;
+ 	const char		**part_probe_types;
++	int			(*chip_fixup)(struct mtd_info *mtd);
+ 	void			*priv;
+ };
+ 
+--- a/drivers/mtd/nand/plat_nand.c
++++ b/drivers/mtd/nand/plat_nand.c
+@@ -70,7 +70,18 @@
+ 	platform_set_drvdata(pdev, data);
+ 
+ 	/* Scan to find existance of the device */
+-	if (nand_scan(&data->mtd, 1)) {
++	if (nand_scan_ident(&data->mtd, 1)) {
++		res = -ENXIO;
++		goto out;
++	}
++
++	if (pdata->chip.chip_fixup) {
++		res = pdata->chip.chip_fixup(&data->mtd);
++		if (res)
++			goto out;
++	}
++
++	if (nand_scan_tail(&data->mtd)) {
+ 		res = -ENXIO;
+ 		goto out;
+ 	}

target/linux/generic-2.6/patches-2.6.25/080-mtd_plat_nand_chip_fixup.patch

+--- a/include/linux/mtd/nand.h
++++ b/include/linux/mtd/nand.h
+@@ -573,6 +573,7 @@
+ 	int			chip_delay;
+ 	unsigned int		options;
+ 	const char		**part_probe_types;
++	int			(*chip_fixup)(struct mtd_info *mtd);
+ 	void			*priv;
+ };
+ 
+--- a/drivers/mtd/nand/plat_nand.c
++++ b/drivers/mtd/nand/plat_nand.c
+@@ -70,7 +70,18 @@
+ 	platform_set_drvdata(pdev, data);
+ 
+ 	/* Scan to find existance of the device */
+-	if (nand_scan(&data->mtd, 1)) {
++	if (nand_scan_ident(&data->mtd, 1)) {
++		res = -ENXIO;
++		goto out;
++	}
++
++	if (pdata->chip.chip_fixup) {
++		res = pdata->chip.chip_fixup(&data->mtd);
++		if (res)
++			goto out;
++	}
++
++	if (nand_scan_tail(&data->mtd)) {
+ 		res = -ENXIO;
+ 		goto out;
+ 	}