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From: Sascha Hauer <s.hauer@pengutronix.de>
To: barebox@lists.infradead.org
Subject: [PATCH 04/13] imx nand: remove unnecessary register write
Date: Wed, 10 Nov 2010 15:53:50 +0100	[thread overview]
Message-ID: <1289400839-5937-5-git-send-email-s.hauer@pengutronix.de> (raw)
In-Reply-To: <1289400839-5937-1-git-send-email-s.hauer@pengutronix.de>

NFC_SP_EN is cleared in probe and never set again, so we do not
need to clear it in other functions again.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
---
 drivers/mtd/nand/nand_imx.c |   13 +------------
 1 files changed, 1 insertions(+), 12 deletions(-)

diff --git a/drivers/mtd/nand/nand_imx.c b/drivers/mtd/nand/nand_imx.c
index b49b7db..4b74974 100644
--- a/drivers/mtd/nand/nand_imx.c
+++ b/drivers/mtd/nand/nand_imx.c
@@ -321,16 +321,10 @@ static void send_page(struct imx_nand_host *host,
 static void send_read_id(struct imx_nand_host *host)
 {
 	struct nand_chip *this = &host->nand;
-	u16 tmp;
 
 	/* NANDFC buffer 0 is used for device ID output */
 	writew(0x0, host->regs + NFC_BUF_ADDR);
 
-	/* Read ID into main buffer */
-	tmp = readw(host->regs + NFC_CONFIG1);
-	tmp &= ~NFC_SP_EN;
-	writew(tmp, host->regs + NFC_CONFIG1);
-
 	writew(NFC_ID, host->regs + NFC_CONFIG2);
 
 	/* Wait for operation to complete */
@@ -362,7 +356,7 @@ static u16 get_dev_status(struct imx_nand_host *host)
 {
 	void *main_buf = host->main_area0;
 	u32 store;
-	u16 ret, tmp;
+	u16 ret;
 
 	writew(0x0, host->regs + NFC_BUF_ADDR);
 
@@ -373,11 +367,6 @@ static u16 get_dev_status(struct imx_nand_host *host)
 	 */
 	store = readl(main_buf);
 
-	/* Read status into main buffer */
-	tmp = readw(host->regs + NFC_CONFIG1);
-	tmp &= ~NFC_SP_EN;
-	writew(tmp, host->regs + NFC_CONFIG1);
-
 	writew(NFC_STATUS, host->regs + NFC_CONFIG2);
 
 	/* Wait for operation to complete */
-- 
1.7.2.3


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  parent reply	other threads:[~2010-11-10 14:54 UTC|newest]

Thread overview: 19+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2010-11-10 14:53 add i.MX51 Nand support Sascha Hauer
2010-11-10 14:53 ` [PATCH 01/13] NAND: reset chips before usage like the kernel does Sascha Hauer
2010-11-10 14:53 ` [PATCH 02/13] imx_nand: remove 0xe00 offset from registers Sascha Hauer
2010-11-10 14:53 ` [PATCH 03/13] imx_nand: rework get_dev_status Sascha Hauer
2010-11-10 14:53 ` Sascha Hauer [this message]
2010-11-10 14:53 ` [PATCH 05/13] imx_nand: make some internally used functions overwriteable Sascha Hauer
2010-11-10 14:53 ` [PATCH 06/13] imx nand: do not read-modify-write SPAS register Sascha Hauer
2010-11-10 14:53 ` [PATCH 07/13] imx nand: add V1_V2 namespace to registers Sascha Hauer
2010-11-10 14:53 ` [PATCH 08/13] mxc_nand: fix correct_data function Sascha Hauer
2010-11-11  5:25   ` Baruch Siach
2010-11-11 10:32     ` Sascha Hauer
2010-11-15 12:08       ` [PATCH] " Baruch Siach
2010-11-10 14:53 ` [PATCH 09/13] imx nand: move initialization to preset function Sascha Hauer
2010-11-10 14:53 ` [PATCH 10/13] imx nand: introduce overwritable check_int function Sascha Hauer
2010-11-10 14:53 ` [PATCH 11/13] imx nand: Add v3 (i.MX51) support Sascha Hauer
2010-11-10 14:53 ` [PATCH 12/13] fb: set id for framebuffer device correctly Sascha Hauer
2010-11-10 14:55   ` Sascha Hauer
2010-11-10 14:53 ` [PATCH 13/13] ARM i.MX51: Add nand device Sascha Hauer
2010-11-11  5:26 ` add i.MX51 Nand support Jean-Christophe PLAGNIOL-VILLARD

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