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From: Huang Shijie <b32955@freescale.com>
To: <dwmw2@infradead.org>
Cc: Huang Shijie <b32955@freescale.com>,
	linux-mtd@lists.infradead.org,
	linux-arm-kernel@lists.infradead.org, dedekind1@gmail.com
Subject: [PATCH 3/4] mtd: gpmi: scan two nand chips
Date: Fri, 14 Jun 2013 16:06:24 +0800	[thread overview]
Message-ID: <1371197185-27491-4-git-send-email-b32955@freescale.com> (raw)
In-Reply-To: <1371197185-27491-1-git-send-email-b32955@freescale.com>

Some nand chip has two DIEs in a single chip, such as Micron MT29F32G08QAA.
Each die has its own chip select pin, so this chip acts as two nand
chips.

If we only scan one chip, we may find that we only get 2G for this chip,
but in actually, this chip's size is 4G.

So scan two chips by default.

Signed-off-by: Huang Shijie <b32955@freescale.com>
---
 drivers/mtd/nand/gpmi-nand/gpmi-nand.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/drivers/mtd/nand/gpmi-nand/gpmi-nand.c b/drivers/mtd/nand/gpmi-nand/gpmi-nand.c
index 036e5e4..bb8af93 100644
--- a/drivers/mtd/nand/gpmi-nand/gpmi-nand.c
+++ b/drivers/mtd/nand/gpmi-nand/gpmi-nand.c
@@ -1551,7 +1551,7 @@ static int gpmi_nfc_init(struct gpmi_nand_data *this)
 	if (ret)
 		goto err_out;
 
-	ret = nand_scan(mtd, 1);
+	ret = nand_scan(mtd, 2);
 	if (ret) {
 		pr_err("Chip scan failed\n");
 		goto err_out;
-- 
1.7.1

WARNING: multiple messages have this Message-ID (diff)
From: b32955@freescale.com (Huang Shijie)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH 3/4] mtd: gpmi: scan two nand chips
Date: Fri, 14 Jun 2013 16:06:24 +0800	[thread overview]
Message-ID: <1371197185-27491-4-git-send-email-b32955@freescale.com> (raw)
In-Reply-To: <1371197185-27491-1-git-send-email-b32955@freescale.com>

Some nand chip has two DIEs in a single chip, such as Micron MT29F32G08QAA.
Each die has its own chip select pin, so this chip acts as two nand
chips.

If we only scan one chip, we may find that we only get 2G for this chip,
but in actually, this chip's size is 4G.

So scan two chips by default.

Signed-off-by: Huang Shijie <b32955@freescale.com>
---
 drivers/mtd/nand/gpmi-nand/gpmi-nand.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/drivers/mtd/nand/gpmi-nand/gpmi-nand.c b/drivers/mtd/nand/gpmi-nand/gpmi-nand.c
index 036e5e4..bb8af93 100644
--- a/drivers/mtd/nand/gpmi-nand/gpmi-nand.c
+++ b/drivers/mtd/nand/gpmi-nand/gpmi-nand.c
@@ -1551,7 +1551,7 @@ static int gpmi_nfc_init(struct gpmi_nand_data *this)
 	if (ret)
 		goto err_out;
 
-	ret = nand_scan(mtd, 1);
+	ret = nand_scan(mtd, 2);
 	if (ret) {
 		pr_err("Chip scan failed\n");
 		goto err_out;
-- 
1.7.1

  parent reply	other threads:[~2013-06-14  8:06 UTC|newest]

Thread overview: 14+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2013-06-14  8:06 [PATCH 0/4] mtd: gpmi: support two nand chips at most Huang Shijie
2013-06-14  8:06 ` Huang Shijie
2013-06-14  8:06 ` [PATCH 1/4] mtd: gpmi: decouple the chip select from the DMA channel Huang Shijie
2013-06-14  8:06   ` Huang Shijie
2013-06-14  8:06 ` [PATCH 2/4] mtd: gpmi: use DMA channel 0 for all the nand chips Huang Shijie
2013-06-14  8:06   ` Huang Shijie
2013-06-14  8:06 ` Huang Shijie [this message]
2013-06-14  8:06   ` [PATCH 3/4] mtd: gpmi: scan two " Huang Shijie
2013-06-14  8:06 ` [PATCH 4/4] mtd: gpmi: imx6: fix the wrong method for checking ready/busy Huang Shijie
2013-06-14  8:06   ` Huang Shijie
2013-08-11  6:09 ` [PATCH 0/4] mtd: gpmi: support two nand chips at most Brian Norris
2013-08-11  6:09   ` Brian Norris
2013-08-11 19:52   ` Huang Shijie
2013-08-11 19:52     ` Huang Shijie

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