linux-kernel - [PATCH 2/2] mtd: add helpers to get the supportted ONFI timing mode

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Date:	Mon, 10 Sep 2012 14:01:11 +0800
From:	Huang Shijie <b32955@...escale.com>
To:	<dwmw2@...radead.org>
CC:	<dedekind1@...il.com>, <computersforpeace@...il.com>,
	<shmulik.ladkani@...il.com>, <mikedunn@...sguy.com>,
	<linux-mtd@...ts.infradead.org>, <linux-kernel@...r.kernel.org>,
	Huang Shijie <b32955@...escale.com>
Subject: [PATCH 2/2] mtd: add helpers to get the supportted ONFI timing mode

add onfi_get_async_timing_mode() to get the supportted asynchronous
timing mode.

add onfi_get_sync_timing_mode() to get the supportted synchronous
timing mode.

Also add the neccessary macros : the timing modes.

Signed-off-by: Huang Shijie <b32955@...escale.com>
---
 include/linux/mtd/nand.h |   20 ++++++++++++++++++++
 1 files changed, 20 insertions(+), 0 deletions(-)

diff --git a/include/linux/mtd/nand.h b/include/linux/mtd/nand.h
index 641794c..83b85a1 100644
--- a/include/linux/mtd/nand.h
+++ b/include/linux/mtd/nand.h
@@ -231,6 +231,14 @@ typedef enum {
 /* Keep gcc happy */
 struct nand_chip;
 
+/* ONFI timing mode, used in both asynchronous and synchronous mode */
+#define ONFI_TIMING_MODE_0	(1 << 0)
+#define ONFI_TIMING_MODE_1	(1 << 1)
+#define ONFI_TIMING_MODE_2	(1 << 2)
+#define ONFI_TIMING_MODE_3	(1 << 3)
+#define ONFI_TIMING_MODE_4	(1 << 4)
+#define ONFI_TIMING_MODE_5	(1 << 5)
+
 /* ONFI feature address */
 #define ONFI_FEATURE_ADDR_TIMING_MODE	0x1
 
@@ -682,4 +690,16 @@ struct platform_nand_chip *get_platform_nandchip(struct mtd_info *mtd)
 	return chip->priv;
 }
 
+/* return the supported asynchronous timing mode. */
+static inline int onfi_get_async_timing_mode(struct nand_chip *chip)
+{
+	return le16_to_cpu(chip->onfi_params.async_timing_mode);
+}
+
+/* return the supported synchronous timing mode. */
+static inline int onfi_get_sync_timing_mode(struct nand_chip *chip)
+{
+	return le16_to_cpu(chip->onfi_params.src_sync_timing_mode);
+}
+
 #endif /* __LINUX_MTD_NAND_H */
-- 
1.7.0.4


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