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From: Huang Shijie <b32955@freescale.com>
To: <dwmw2@infradead.org>
Cc: Huang Shijie <b32955@freescale.com>,
	computersforpeace@gmail.com, linux-mtd@lists.infradead.org
Subject: [PATCH v2 3/5] mtd: nand: add a helper to get the supported features for JEDEC
Date: Sat, 8 Feb 2014 14:03:59 +0800	[thread overview]
Message-ID: <1391839441-21006-4-git-send-email-b32955@freescale.com> (raw)
In-Reply-To: <1391839441-21006-1-git-send-email-b32955@freescale.com>

Add a helper to get the supported features for JEDEC compliant nand.
Also add a macro JEDEC_FEATURE_16_BIT_BUS.

Signed-off-by: Huang Shijie <b32955@freescale.com>
---
 include/linux/mtd/nand.h |    9 +++++++++
 1 files changed, 9 insertions(+), 0 deletions(-)

diff --git a/include/linux/mtd/nand.h b/include/linux/mtd/nand.h
index 9686390..84cca61 100644
--- a/include/linux/mtd/nand.h
+++ b/include/linux/mtd/nand.h
@@ -350,6 +350,9 @@ struct jedec_ecc_info {
 	u8 reserved[2];
 } __packed;
 
+/* JEDEC features */
+#define JEDEC_FEATURE_16_BIT_BUS	(1 << 0)
+
 struct nand_jedec_params {
 	/* rev info and features block */
 	/* 'J' 'E' 'S' 'D'  */
@@ -921,4 +924,10 @@ static inline int nand_opcode_8bits(unsigned int command)
 	return command == NAND_CMD_READID;
 }
 
+/* return the supported JEDEC features. */
+static inline int jedec_feature(struct nand_chip *chip)
+{
+	return chip->jedec_version ? le16_to_cpu(chip->jedec_params.features)
+		: 0;
+}
 #endif /* __LINUX_MTD_NAND_H */
-- 
1.7.2.rc3

  parent reply	other threads:[~2014-02-08  6:45 UTC|newest]

Thread overview: 12+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2014-02-08  6:03 [PATCH v2 0/5] mtd: nand: support the JEDEC compliant nand Huang Shijie
2014-02-08  6:03 ` [PATCH v2 1/5] mtd: nand: add the data structures for JEDEC parameter page Huang Shijie
2014-02-08  6:03 ` [PATCH v2 2/5] mtd: nand: add fields for JEDEC in nand_chip Huang Shijie
2014-02-11 20:36   ` Brian Norris
2014-02-08  6:03 ` Huang Shijie [this message]
2014-02-08  6:04 ` [PATCH v2 4/5] mtd: nand: parse out the JEDEC compliant nand Huang Shijie
2014-02-11 20:32   ` Brian Norris
2014-02-14  7:08     ` Huang Shijie
2014-02-20  8:00       ` Brian Norris
2014-02-08  6:04 ` [PATCH v2 5/5] mtd: nand: print out the right information for " Huang Shijie
2014-02-11 20:43 ` [PATCH v2 0/5] mtd: nand: support the " Brian Norris
2014-02-14  6:47   ` Huang Shijie

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