From: Huang Shijie <shijie8@gmail.com>
Date: Fri, 17 May 2013 03:17:28 +0000 (+0800)
Subject: mtd: add a helper to get the supported features for ONFI nand
X-Git-Tag: next-20130822~69^2~51
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=c5aeb3ffc15df976af51e7cb2a28364fe9d46c0e;p=karo-tx-linux.git

mtd: add a helper to get the supported features for ONFI nand

add a helper to get the supported features for ONFI nand.
Also add the neccessary macros.

Signed-off-by: Huang Shijie <b32955@freescale.com>
Reviewed-and-tested-by: Brian Norris <computersforpeace@gmail.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
---

diff --git a/include/linux/mtd/nand.h b/include/linux/mtd/nand.h
index 01a7f3c71bd0..bf4c566f0647 100644
--- a/include/linux/mtd/nand.h
+++ b/include/linux/mtd/nand.h
@@ -202,6 +202,10 @@ typedef enum {
 /* Keep gcc happy */
 struct nand_chip;
 
+/* ONFI features */
+#define ONFI_FEATURE_16_BIT_BUS		(1 << 0)
+#define ONFI_FEATURE_EXT_PARAM_PAGE	(1 << 7)
+
 /* ONFI timing mode, used in both asynchronous and synchronous mode */
 #define ONFI_TIMING_MODE_0		(1 << 0)
 #define ONFI_TIMING_MODE_1		(1 << 1)
@@ -756,6 +760,12 @@ struct platform_nand_chip *get_platform_nandchip(struct mtd_info *mtd)
 	return chip->priv;
 }
 
+/* return the supported features. */
+static inline int onfi_feature(struct nand_chip *chip)
+{
+	return chip->onfi_version ? le16_to_cpu(chip->onfi_params.features) : 0;
+}
+
 /* return the supported asynchronous timing mode. */
 static inline int onfi_get_async_timing_mode(struct nand_chip *chip)
 {