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[v5,05/11] mtd: add a helper to get the supported features for ONFI nand

Message ID 1368607232-2210-6-git-send-email-b32955@freescale.com
State New, archived
Headers show

Commit Message

Huang Shijie May 15, 2013, 8:40 a.m. UTC 
From: Huang Shijie <shijie8@gmail.com>

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

Signed-off-by: Huang Shijie <b32955@freescale.com>
---
 include/linux/mtd/nand.h |   10 ++++++++++
 1 files changed, 10 insertions(+), 0 deletions(-)
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Patch

diff --git a/include/linux/mtd/nand.h b/include/linux/mtd/nand.h
index 8b8fd93..c503850 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)
@@ -753,6 +757,12 @@  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)
 {