Commit 778dbcc1 authored by Magnus Damm's avatar Magnus Damm Committed by David Woodhouse
Browse files

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: default avatarMagnus 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: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarDavid Woodhouse <David.Woodhouse@intel.com>
parent f33dabbe

arch/arm/mach-omap2/board-apollon.c

+2 −2
Original line number Diff line number Diff line
@@ -87,7 +87,7 @@ static struct mtd_partition apollon_partitions[] = { 
	},

};



static struct flash_platform_data apollon_flash_data = {

static struct onenand_platform_data apollon_flash_data = {

	.parts		= apollon_partitions,

	.nr_parts	= ARRAY_SIZE(apollon_partitions),

};
@@ -99,7 +99,7 @@ static struct resource apollon_flash_resource[] = { 
};



static struct platform_device apollon_onenand_device = {

	.name		= "onenand",

	.name		= "onenand-flash",

	.id		= -1,

	.dev		= {

		.platform_data	= &apollon_flash_data,

drivers/mtd/onenand/Kconfig

+0 −1
Original line number Diff line number Diff line
@@ -24,7 +24,6 @@ config MTD_ONENAND_VERIFY_WRITE 


config MTD_ONENAND_GENERIC

	tristate "OneNAND Flash device via platform device driver"

	depends on ARM

	help

	  Support for OneNAND flash via platform device driver.

drivers/mtd/onenand/generic.c

+14 −10
Original line number Diff line number Diff line
@@ -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 @@ struct onenand_info { 
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 @@ static int __devinit generic_onenand_probe(struct platform_device *pdev) 
		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 @@ static int __devinit generic_onenand_probe(struct platform_device *pdev) 
	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 @@ static int __devexit generic_onenand_remove(struct platform_device *pdev) 
{

	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);

include/linux/mtd/onenand.h

+8 −0
Original line number Diff line number Diff line
@@ -214,4 +214,12 @@ unsigned onenand_block(struct onenand_chip *this, loff_t addr); 
loff_t onenand_addr(struct onenand_chip *this, int block);

int flexonenand_region(struct mtd_info *mtd, loff_t addr);



struct mtd_partition;



struct onenand_platform_data {

	void		(*mmcontrol)(struct mtd_info *mtd, int sync_read);

	struct mtd_partition *parts;

	unsigned int	nr_parts;

};



#endif	/* __LINUX_MTD_ONENAND_H */

CRA Git | Maintained and supported by SUSTech CRA and CCSE