[PATCH V4 3/9] mtd: add a helper to get the supported features for ONFI nand

Huang Shijie
2013-04-26T09:22:48Z

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(-)

diff --git a/include/linux/mtd/nand.h b/include/linux/mtd/nand.h
index 9bad296..9b28739 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)
{
--
1.7.1