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MIPS: TXx9: Add mtd support

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Add helper routines to register physmap-flash platform devices for NOR
flashes.

Signed-off-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
This commit is contained in:
Atsushi Nemoto
2008-08-19 22:55:11 +09:00
committed by Ralf Baechle
parent c7b95bcb38
commit 51f607c76e
11 changed files with 150 additions and 0 deletions
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41
arch/mips/txx9/generic/setup.c
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@@ -22,6 +22,7 @@
#include <linux/gpio.h>
#include <linux/platform_device.h>
#include <linux/serial_core.h>
#include <linux/mtd/physmap.h>
#include <asm/bootinfo.h>
#include <asm/time.h>
#include <asm/reboot.h>
@@ -593,3 +594,43 @@ static unsigned long __swizzle_addr_none(unsigned long port)
unsigned long (*__swizzle_addr_b)(unsigned long port) = __swizzle_addr_none;
EXPORT_SYMBOL(__swizzle_addr_b);
#endif
void __init txx9_physmap_flash_init(int no, unsigned long addr,
unsigned long size,
const struct physmap_flash_data *pdata)
{
#if defined(CONFIG_MTD_PHYSMAP) || defined(CONFIG_MTD_PHYSMAP_MODULE)
struct resource res = {
.start = addr,
.end = addr + size - 1,
.flags = IORESOURCE_MEM,
};
struct platform_device *pdev;
#ifdef CONFIG_MTD_PARTITIONS
static struct mtd_partition parts[2];
struct physmap_flash_data pdata_part;
/* If this area contained boot area, make separate partition */
if (pdata->nr_parts == 0 && !pdata->parts &&
addr < 0x1fc00000 && addr + size > 0x1fc00000 &&
!parts[0].name) {
parts[0].name = "boot";
parts[0].offset = 0x1fc00000 - addr;
parts[0].size = addr + size - 0x1fc00000;
parts[1].name = "user";
parts[1].offset = 0;
parts[1].size = 0x1fc00000 - addr;
pdata_part = *pdata;
pdata_part.nr_parts = ARRAY_SIZE(parts);
pdata_part.parts = parts;
pdata = &pdata_part;
}
#endif
pdev = platform_device_alloc("physmap-flash", no);
if (!pdev ||
platform_device_add_resources(pdev, &res, 1) ||
platform_device_add_data(pdev, pdata, sizeof(*pdata)) ||
platform_device_add(pdev))
platform_device_put(pdev);
#endif
}