linux-kernel - [PATCH v2 06/22] mtd: nand: omap2: Switch to using GPMC-NAND ops for writebuffer empty check

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Message-ID: <1438938752-31010-7-git-send-email-rogerq@ti.com>
Date:	Fri, 7 Aug 2015 12:12:16 +0300
From:	Roger Quadros <rogerq@...com>
To:	<tony@...mide.com>
CC:	<dwmw2@...radead.org>, <computersforpeace@...il.com>,
	<ezequiel@...guardiasur.com.ar>, <javier@...hile0.org>,
	<fcooper@...com>, <nsekhar@...com>,
	<linux-mtd@...ts.infradead.org>, <linux-omap@...r.kernel.org>,
	<devicetree@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
	Roger Quadros <rogerq@...com>
Subject: [PATCH v2 06/22] mtd: nand: omap2: Switch to using GPMC-NAND ops for writebuffer empty check

Instead of accessing the gpmc_status register directly start
using the gpmc_nand_ops->nand_writebuffer_empty() helper
to check write buffer empty status.

Signed-off-by: Roger Quadros <rogerq@...com>
---
 drivers/mtd/nand/omap2.c | 12 ++----------
 1 file changed, 2 insertions(+), 10 deletions(-)

diff --git a/drivers/mtd/nand/omap2.c b/drivers/mtd/nand/omap2.c
index f214fe2..5c2f6df 100644
--- a/drivers/mtd/nand/omap2.c
+++ b/drivers/mtd/nand/omap2.c
@@ -289,15 +289,11 @@ static void omap_write_buf8(struct mtd_info *mtd, const u_char *buf, int len)
 	struct omap_nand_info *info = container_of(mtd,
 						struct omap_nand_info, mtd);
 	u_char *p = (u_char *)buf;
-	u32	status = 0;
 
 	while (len--) {
 		iowrite8(*p++, info->nand.IO_ADDR_W);
 		/* wait until buffer is available for write */
-		do {
-			status = readl(info->reg.gpmc_status) &
-					STATUS_BUFF_EMPTY;
-		} while (!status);
+		while (info->ops->nand_writebuffer_empty());
 	}
 }
 
@@ -325,17 +321,13 @@ static void omap_write_buf16(struct mtd_info *mtd, const u_char * buf, int len)
 	struct omap_nand_info *info = container_of(mtd,
 						struct omap_nand_info, mtd);
 	u16 *p = (u16 *) buf;
-	u32	status = 0;
 	/* FIXME try bursts of writesw() or DMA ... */
 	len >>= 1;
 
 	while (len--) {
 		iowrite16(*p++, info->nand.IO_ADDR_W);
 		/* wait until buffer is available for write */
-		do {
-			status = readl(info->reg.gpmc_status) &
-					STATUS_BUFF_EMPTY;
-		} while (!status);
+		while (info->ops->nand_writebuffer_empty());
 	}
 }
 
-- 
2.1.4

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