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[MTD] [MAPS] Extend plat-ram to support a supplied probe type 

This enhances plat-ram to take a map_probes argument in
the platform_data structure which allow plat-ram to support
any direct-mapped device that MTD supports (jedec, cfi, amd ..)

A few items are also fixed:
- Don't panic if probes is 0
- Actually use the partition list that is passed in

Signed-off-by: Florian Fainelli <florian.fainelli@telecomint.eu>
Signed-off-by: Jason Gunthorpe <jgunthorpe@obsidianresearch.com>
Signed-off-by: David Woodhouse <dwmw2@infradead.org>
This commit is contained in:
Florian Fainelli 2008-03-03 18:30:24 +01:00 committed by David Woodhouse
parent ca5c23c3b8
commit 757570063a
2 changed files with 35 additions and 17 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

47
drivers/mtd/maps/plat-ram.c
View File

@ -47,6 +47,7 @@ struct platram_info {
struct mtd_info *mtd;
struct map_info map;
struct mtd_partition *partitions;
bool free_partitions;
struct resource *area;
struct platdata_mtd_ram *pdata;
};
@ -98,7 +99,8 @@ static int platram_remove(struct platform_device *pdev)
#ifdef CONFIG_MTD_PARTITIONS
if (info->partitions) {
del_mtd_partitions(info->mtd);
kfree(info->partitions);
if (info->free_partitions)
kfree(info->partitions);
}
#endif
del_mtd_device(info->mtd);
@ -176,7 +178,8 @@ static int platram_probe(struct platform_device *pdev)
info->map.phys = res->start;
info->map.size = (res->end - res->start) + 1;
info->map.name = pdata->mapname != NULL ? pdata->mapname : (char *)pdev->name;
info->map.name = pdata->mapname != NULL ?
(char *)pdata->mapname : (char *)pdev->name;
info->map.bankwidth = pdata->bankwidth;
/* register our usage of the memory area */
@ -203,9 +206,19 @@ static int platram_probe(struct platform_device *pdev)
dev_dbg(&pdev->dev, "initialised map, probing for mtd\n");
/* probe for the right mtd map driver */
/* probe for the right mtd map driver
* supplied by the platform_data struct */
if (pdata->map_probes != 0) {
const char **map_probes = pdata->map_probes;
for ( ; !info->mtd && *map_probes; map_probes++)
info->mtd = do_map_probe(*map_probes , &info->map);
}
/* fallback to map_ram */
else
info->mtd = do_map_probe("map_ram", &info->map);
info->mtd = do_map_probe("map_ram" , &info->map);
if (info->mtd == NULL) {
dev_err(&pdev->dev, "failed to probe for map_ram\n");
err = -ENOMEM;
@ -220,19 +233,21 @@ static int platram_probe(struct platform_device *pdev)
* to add this device whole */
#ifdef CONFIG_MTD_PARTITIONS
if (pdata->nr_partitions > 0) {
const char **probes = { NULL };
if (pdata->probes)
probes = (const char **)pdata->probes;
err = parse_mtd_partitions(info->mtd, probes,
if (!pdata->nr_partitions) {
/* try to probe using the supplied probe type */
if (pdata->probes) {
err = parse_mtd_partitions(info->mtd, pdata->probes,
&info->partitions, 0);
if (err > 0) {
err = add_mtd_partitions(info->mtd, info->partitions,
err);
info->free_partitions = 1;
if (err > 0)
err = add_mtd_partitions(info->mtd,
info->partitions, err);
}
}
/* use the static mapping */
else
err = add_mtd_partitions(info->mtd, pdata->partitions,
pdata->nr_partitions);
#endif /* CONFIG_MTD_PARTITIONS */
if (add_mtd_device(info->mtd)) {
@ -240,7 +255,9 @@ static int platram_probe(struct platform_device *pdev)
err = -ENOMEM;
}
dev_info(&pdev->dev, "registered mtd device\n");
if (!err)
dev_info(&pdev->dev, "registered mtd device\n");
return err;
exit_free:

5
include/linux/mtd/plat-ram.h
View File

@ -21,8 +21,9 @@
#define PLATRAM_RW (1)
struct platdata_mtd_ram {
char *mapname;
char **probes;
const char *mapname;
const char **map_probes;
const char **probes;
struct mtd_partition *partitions;
int nr_partitions;
int bankwidth;