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MTD: MIPS: lantiq: implement OF support

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Adds bindings for OF and make use of module_platform_driver for lantiq
based socs.

Signed-off-by: John Crispin <blogic@openwrt.org>
Acked-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
Cc: linux-mtd@lists.infradead.org
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/3811/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
This commit is contained in:
John Crispin 2012-04-13 09:36:46 +02:00 committed by Ralf Baechle
parent cdb8612147
commit 02fa961fbf
1 changed files with 25 additions and 44 deletions
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69
drivers/mtd/maps/lantiq-flash.c
View File

@ -21,7 +21,6 @@
#include <linux/mtd/physmap.h> #include <linux/mtd/physmap.h>
#include <lantiq_soc.h> #include <lantiq_soc.h>
#include <lantiq_platform.h>
/* /*
* The NOR flash is connected to the same external bus unit (EBU) as PCI. * The NOR flash is connected to the same external bus unit (EBU) as PCI.
@ -44,8 +43,9 @@ struct ltq_mtd {
struct map_info *map; struct map_info *map;
}; };
static char ltq_map_name[] = "ltq_nor"; static const char ltq_map_name[] = "ltq_nor";
static const char *ltq_probe_types[] __devinitconst = { "cmdlinepart", NULL }; static const char *ltq_probe_types[] __devinitconst = {
"cmdlinepart", "ofpart", NULL };
static map_word static map_word
ltq_read16(struct map_info *map, unsigned long adr) ltq_read16(struct map_info *map, unsigned long adr)
@ -108,12 +108,11 @@ ltq_copy_to(struct map_info *map, unsigned long to,
spin_unlock_irqrestore(&ebu_lock, flags); spin_unlock_irqrestore(&ebu_lock, flags);
} }
static int __init static int __devinit
ltq_mtd_probe(struct platform_device *pdev) ltq_mtd_probe(struct platform_device *pdev)
{ {
struct physmap_flash_data *ltq_mtd_data = dev_get_platdata(&pdev->dev); struct mtd_part_parser_data ppdata;
struct ltq_mtd *ltq_mtd; struct ltq_mtd *ltq_mtd;
struct resource *res;
struct cfi_private *cfi; struct cfi_private *cfi;
int err; int err;
@ -122,30 +121,21 @@ ltq_mtd_probe(struct platform_device *pdev)
ltq_mtd->res = platform_get_resource(pdev, IORESOURCE_MEM, 0); ltq_mtd->res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
if (!ltq_mtd->res) { if (!ltq_mtd->res) {
dev_err(&pdev->dev, "failed to get memory resource"); dev_err(&pdev->dev, "failed to get memory resource\n");
err = -ENOENT; err = -ENOENT;
goto err_out; goto err_out;
} }
res = devm_request_mem_region(&pdev->dev, ltq_mtd->res->start, ltq_mtd->map = kzalloc(sizeof(struct map_info), GFP_KERNEL);
resource_size(ltq_mtd->res), dev_name(&pdev->dev)); ltq_mtd->map->phys = ltq_mtd->res->start;
if (!ltq_mtd->res) { ltq_mtd->map->size = resource_size(ltq_mtd->res);
dev_err(&pdev->dev, "failed to request mem resource"); ltq_mtd->map->virt = devm_request_and_ioremap(&pdev->dev, ltq_mtd->res);
if (!ltq_mtd->map->virt) {
dev_err(&pdev->dev, "failed to remap mem resource\n");
err = -EBUSY; err = -EBUSY;
goto err_out; goto err_out;
} }
ltq_mtd->map = kzalloc(sizeof(struct map_info), GFP_KERNEL);
ltq_mtd->map->phys = res->start;
ltq_mtd->map->size = resource_size(res);
ltq_mtd->map->virt = devm_ioremap_nocache(&pdev->dev,
ltq_mtd->map->phys, ltq_mtd->map->size);
if (!ltq_mtd->map->virt) {
dev_err(&pdev->dev, "failed to ioremap!\n");
err = -ENOMEM;
goto err_free;
}
ltq_mtd->map->name = ltq_map_name; ltq_mtd->map->name = ltq_map_name;
ltq_mtd->map->bankwidth = 2; ltq_mtd->map->bankwidth = 2;
ltq_mtd->map->read = ltq_read16; ltq_mtd->map->read = ltq_read16;
@ -169,9 +159,9 @@ ltq_mtd_probe(struct platform_device *pdev)
cfi->addr_unlock1 ^= 1; cfi->addr_unlock1 ^= 1;
cfi->addr_unlock2 ^= 1; cfi->addr_unlock2 ^= 1;
err = mtd_device_parse_register(ltq_mtd->mtd, ltq_probe_types, NULL, ppdata.of_node = pdev->dev.of_node;
ltq_mtd_data->parts, err = mtd_device_parse_register(ltq_mtd->mtd, ltq_probe_types,
ltq_mtd_data->nr_parts); &ppdata, NULL, 0);
if (err) { if (err) {
dev_err(&pdev->dev, "failed to add partitions\n"); dev_err(&pdev->dev, "failed to add partitions\n");
goto err_destroy; goto err_destroy;
@ -204,32 +194,23 @@ ltq_mtd_remove(struct platform_device *pdev)
return 0; return 0;
} }
static const struct of_device_id ltq_mtd_match[] = {
{ .compatible = "lantiq,nor" },
{},
};
MODULE_DEVICE_TABLE(of, ltq_mtd_match);
static struct platform_driver ltq_mtd_driver = { static struct platform_driver ltq_mtd_driver = {
.probe = ltq_mtd_probe,
.remove = __devexit_p(ltq_mtd_remove), .remove = __devexit_p(ltq_mtd_remove),
.driver = { .driver = {
.name = "ltq_nor", .name = "ltq-nor",
.owner = THIS_MODULE, .owner = THIS_MODULE,
.of_match_table = ltq_mtd_match,
}, },
}; };
static int __init module_platform_driver(ltq_mtd_driver);
init_ltq_mtd(void)
{
int ret = platform_driver_probe(&ltq_mtd_driver, ltq_mtd_probe);
if (ret)
pr_err("ltq_nor: error registering platform driver");
return ret;
}
static void __exit
exit_ltq_mtd(void)
{
platform_driver_unregister(&ltq_mtd_driver);
}
module_init(init_ltq_mtd);
module_exit(exit_ltq_mtd);
MODULE_LICENSE("GPL"); MODULE_LICENSE("GPL");
MODULE_AUTHOR("John Crispin <blogic@openwrt.org>"); MODULE_AUTHOR("John Crispin <blogic@openwrt.org>");