Patchwork [16/19] mxc_nand: disable sp_en bit only once

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Submitter Sascha Hauer
Date Oct. 21, 2009, 2:13 p.m.
Message ID <1256134406-25251-17-git-send-email-s.hauer@pengutronix.de>
Download mbox | patch
Permalink /patch/36569/
State New
Headers show

Comments

Sascha Hauer - Oct. 21, 2009, 2:13 p.m.
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
---
 drivers/mtd/nand/mxc_nand.c |   15 +++------------
 1 files changed, 3 insertions(+), 12 deletions(-)

Patch

diff --git a/drivers/mtd/nand/mxc_nand.c b/drivers/mtd/nand/mxc_nand.c
index f2297eb..199a5f2 100644
--- a/drivers/mtd/nand/mxc_nand.c
+++ b/drivers/mtd/nand/mxc_nand.c
@@ -274,16 +274,10 @@  static void send_page(struct mtd_info *mtd, unsigned int ops)
 static void send_read_id(struct mxc_nand_host *host)
 {
 	struct nand_chip *this = &host->nand;
-	uint16_t 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 */
@@ -307,7 +301,7 @@  static uint16_t get_dev_status(struct mxc_nand_host *host)
 {
 	void __iomem *main_buf = host->main_area1;
 	uint32_t store;
-	uint16_t ret, tmp;
+	uint16_t ret;
 	/* Issue status request to NAND device */
 
 	/* store the main area1 first word, later do recovery */
@@ -316,11 +310,6 @@  static uint16_t get_dev_status(struct mxc_nand_host *host)
 	 * corruption of read/write buffer on status requests. */
 	writew(1, host->regs + NFC_BUF_ADDR);
 
-	/* 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 */
@@ -739,8 +728,10 @@  static int __init mxcnd_probe(struct platform_device *pdev)
 	} else
 		BUG();
 
+	/* disable interrupt and spare enable */
 	tmp = readw(host->regs + NFC_CONFIG1);
 	tmp |= NFC_INT_MSK;
+	tmp &= ~NFC_SP_EN;
 	writew(tmp, host->regs + NFC_CONFIG1);
 
 	init_waitqueue_head(&host->irq_waitq);