mtd: onenand: make onenand/generic.c more generic
Remove the ARM dependency from the generic "onenand" platform device
driver. This change makes the driver useful for other architectures as
well. Needed for the SuperH kfr2r09 board.
Apart from the obvious Kconfig bits, the most important change is the move
away from ARM specific includes and platform data. Together with this
change the only in-tree board code gets an update, and the driver name is
also changed gracefully break potential out of tree drivers.
The driver is also updated to allow NULL as platform data together with a
few changes to make use of resource_size() and dev_name().
Signed-off-by: Magnus Damm <damm@igel.co.jp>
Cc: Paul Mundt <lethal@linux-sh.org>
Cc: Tony Lindgren <tony@atomide.com>
Cc: Kyungmin Park <kmpark@infradead.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
diff --git a/drivers/mtd/onenand/generic.c b/drivers/mtd/onenand/generic.c
index 3a496c3..e789149 100644
--- a/drivers/mtd/onenand/generic.c
+++ b/drivers/mtd/onenand/generic.c
@@ -19,12 +19,16 @@
#include <linux/mtd/mtd.h>
#include <linux/mtd/onenand.h>
#include <linux/mtd/partitions.h>
-
#include <asm/io.h>
-#include <asm/mach/flash.h>
-#define DRIVER_NAME "onenand"
-
+/*
+ * Note: Driver name and platform data format have been updated!
+ *
+ * This version of the driver is named "onenand-flash" and takes struct
+ * onenand_platform_data as platform data. The old ARM-specific version
+ * with the name "onenand" used to take struct flash_platform_data.
+ */
+#define DRIVER_NAME "onenand-flash"
#ifdef CONFIG_MTD_PARTITIONS
static const char *part_probes[] = { "cmdlinepart", NULL, };
@@ -39,16 +43,16 @@
static int __devinit generic_onenand_probe(struct platform_device *pdev)
{
struct onenand_info *info;
- struct flash_platform_data *pdata = pdev->dev.platform_data;
+ struct onenand_platform_data *pdata = pdev->dev.platform_data;
struct resource *res = pdev->resource;
- unsigned long size = res->end - res->start + 1;
+ unsigned long size = resource_size(res);
int err;
info = kzalloc(sizeof(struct onenand_info), GFP_KERNEL);
if (!info)
return -ENOMEM;
- if (!request_mem_region(res->start, size, pdev->dev.driver->name)) {
+ if (!request_mem_region(res->start, size, dev_name(&pdev->dev))) {
err = -EBUSY;
goto out_free_info;
}
@@ -59,7 +63,7 @@
goto out_release_mem_region;
}
- info->onenand.mmcontrol = pdata->mmcontrol;
+ info->onenand.mmcontrol = pdata ? pdata->mmcontrol : 0;
info->onenand.irq = platform_get_irq(pdev, 0);
info->mtd.name = dev_name(&pdev->dev);
@@ -75,7 +79,7 @@
err = parse_mtd_partitions(&info->mtd, part_probes, &info->parts, 0);
if (err > 0)
add_mtd_partitions(&info->mtd, info->parts, err);
- else if (err <= 0 && pdata->parts)
+ else if (err <= 0 && pdata && pdata->parts)
add_mtd_partitions(&info->mtd, pdata->parts, pdata->nr_parts);
else
#endif
@@ -99,7 +103,7 @@
{
struct onenand_info *info = platform_get_drvdata(pdev);
struct resource *res = pdev->resource;
- unsigned long size = res->end - res->start + 1;
+ unsigned long size = resource_size(res);
platform_set_drvdata(pdev, NULL);