mtd: nand: minor davinci_nand cleanup

[Linux-MTD Mailing List]

Gitweb:     http://git.infradead.org/?p=mtd-2.6.git;a=commit;h=533a0149148ccaa0199a1ee6492cd860e3c8b456
Commit:     533a0149148ccaa0199a1ee6492cd860e3c8b456
Parent:     81d19b04a865f9fcc0ca01b20be806169ff9efb3
Author:     David Brownell <dbrownell at users.sourceforge.net>
AuthorDate: Tue Apr 21 19:51:31 2009 -0700
Committer:  David Woodhouse <David.Woodhouse at intel.com>
CommitDate: Fri Jun 5 17:39:22 2009 +0100

    mtd: nand: minor davinci_nand cleanup
    
    Make the DaVinci NAND driver require platform_data with
    board-specific configuration.  We can't actually do any
    kind of sane job of configuring it otherwise.
    
    Also fix the comment about picking the "best" ECC mode.
    
    We can't do those any more; that relied on knowing what kind
    of CPU we're using (they don't all support 4-bit ECC), and
    current policy is that drivers not have cpu_is_*() checks.
    
    Signed-off-by: David Brownell <dbrownell at users.sourceforge.net>
    Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy at nokia.com>
    Signed-off-by: David Woodhouse <David.Woodhouse at intel.com>
---
 drivers/mtd/nand/davinci_nand.c |   27 +++++++++++----------------
 1 files changed, 11 insertions(+), 16 deletions(-)

diff --git a/drivers/mtd/nand/davinci_nand.c b/drivers/mtd/nand/davinci_nand.c
index 0119220..68b7475 100644
--- a/drivers/mtd/nand/davinci_nand.c
+++ b/drivers/mtd/nand/davinci_nand.c
@@ -306,6 +306,10 @@ static int __init nand_davinci_probe(struct platform_device *pdev)
 	uint32_t			val;
 	nand_ecc_modes_t		ecc_mode;
 
+	/* insist on board-specific configuration */
+	if (!pdata)
+		return -ENODEV;
+
 	/* which external chipselect will we be managing? */
 	if (pdev->id < 0 || pdev->id > 3)
 		return -ENODEV;
@@ -351,7 +355,7 @@ static int __init nand_davinci_probe(struct platform_device *pdev)
 	info->chip.select_chip	= nand_davinci_select_chip;
 
 	/* options such as NAND_USE_FLASH_BBT or 16-bit widths */
-	info->chip.options	= pdata ? pdata->options : 0;
+	info->chip.options	= pdata->options;
 
 	info->ioaddr		= (uint32_t __force) vaddr;
 
@@ -360,14 +364,8 @@ static int __init nand_davinci_probe(struct platform_device *pdev)
 	info->mask_chipsel	= pdata->mask_chipsel;
 
 	/* use nandboot-capable ALE/CLE masks by default */
-	if (pdata && pdata->mask_ale)
-		info->mask_ale	= pdata->mask_cle;
-	else
-		info->mask_ale	= MASK_ALE;
-	if (pdata && pdata->mask_cle)
-		info->mask_cle	= pdata->mask_cle;
-	else
-		info->mask_cle	= MASK_CLE;
+	info->mask_ale		= pdata->mask_cle ? : MASK_ALE;
+	info->mask_cle		= pdata->mask_cle ? : MASK_CLE;
 
 	/* Set address of hardware control function */
 	info->chip.cmd_ctrl	= nand_davinci_hwcontrol;
@@ -377,11 +375,8 @@ static int __init nand_davinci_probe(struct platform_device *pdev)
 	info->chip.read_buf     = nand_davinci_read_buf;
 	info->chip.write_buf    = nand_davinci_write_buf;
 
-	/* use board-specific ECC config; else, the best available */
-	if (pdata)
-		ecc_mode = pdata->ecc_mode;
-	else
-		ecc_mode = NAND_ECC_HW;
+	/* Use board-specific ECC config */
+	ecc_mode		= pdata->ecc_mode;
 
 	switch (ecc_mode) {
 	case NAND_ECC_NONE:
@@ -469,7 +464,7 @@ static int __init nand_davinci_probe(struct platform_device *pdev)
 			info->mtd.name = master_name;
 		}
 
-		if (mtd_parts_nb <= 0 && pdata) {
+		if (mtd_parts_nb <= 0) {
 			mtd_parts = pdata->parts;
 			mtd_parts_nb = pdata->nr_parts;
 		}
@@ -482,7 +477,7 @@ static int __init nand_davinci_probe(struct platform_device *pdev)
 				info->partitioned = true;
 		}
 
-	} else if (pdata && pdata->nr_parts) {
+	} else if (pdata->nr_parts) {
 		dev_warn(&pdev->dev, "ignoring %d default partitions on %s\n",
 				pdata->nr_parts, info->mtd.name);
 	}