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bcma: detect and register NAND flash device

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Signed-off-by: Rafał Miłecki <zajec5@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Rafał Miłecki 2012-08-12 13:08:05 +02:00 committed by John W. Linville
parent d57ef3a6a2
commit 371a00448f
5 changed files with 48 additions and 4 deletions
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2
drivers/bcma/Kconfig
View File

@ -53,7 +53,7 @@ config BCMA_SFLASH
config BCMA_NFLASH
bool
depends on BCMA_DRIVER_MIPS && BROKEN
depends on BCMA_DRIVER_MIPS
default y
config BCMA_DRIVER_GMAC_CMN

1
drivers/bcma/bcma_private.h
View File

@ -66,6 +66,7 @@ static inline int bcma_sflash_init(struct bcma_drv_cc *cc)
#ifdef CONFIG_BCMA_NFLASH
/* driver_chipcommon_nflash.c */
int bcma_nflash_init(struct bcma_drv_cc *cc);
extern struct platform_device bcma_nflash_dev;
#else
static inline int bcma_nflash_init(struct bcma_drv_cc *cc)
{

28
drivers/bcma/driver_chipcommon_nflash.c
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@ -5,15 +5,37 @@
* Licensed under the GNU/GPL. See COPYING for details.
*/
#include <linux/platform_device.h>
#include <linux/bcma/bcma.h>
#include <linux/bcma/bcma_driver_chipcommon.h>
#include <linux/delay.h>
#include "bcma_private.h"
struct platform_device bcma_nflash_dev = {
.name = "bcma_nflash",
.num_resources = 0,
};
/* Initialize NAND flash access */
int bcma_nflash_init(struct bcma_drv_cc *cc)
{
bcma_err(cc->core->bus, "NAND flash support is broken\n");
struct bcma_bus *bus = cc->core->bus;
if (bus->chipinfo.id != BCMA_CHIP_ID_BCM4706 &&
cc->core->id.rev != 0x38) {
bcma_err(bus, "NAND flash on unsupported board!\n");
return -ENOTSUPP;
}
if (!(cc->capabilities & BCMA_CC_CAP_NFLASH)) {
bcma_err(bus, "NAND flash not present according to ChipCommon\n");
return -ENODEV;
}
cc->nflash.present = true;
/* Prepare platform device, but don't register it yet. It's too early,
* malloc (required by device_private_init) is not available yet. */
bcma_nflash_dev.dev.platform_data = &cc->nflash;
return 0;
}

8
drivers/bcma/main.c
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@ -145,6 +145,14 @@ static int bcma_register_cores(struct bcma_bus *bus)
}
#endif
#ifdef CONFIG_BCMA_NFLASH
if (bus->drv_cc.nflash.present) {
err = platform_device_register(&bcma_nflash_dev);
if (err)
bcma_err(bus, "Error registering NAND flash\n");
}
#endif
return 0;
}

13
include/linux/bcma/bcma_driver_chipcommon.h
View File

@ -519,6 +519,16 @@ struct bcma_sflash {
};
#endif
#ifdef CONFIG_BCMA_NFLASH
struct mtd_info;
struct bcma_nflash {
bool present;
struct mtd_info *mtd;
};
#endif
struct bcma_serial_port {
void *regs;
unsigned long clockspeed;
@ -542,6 +552,9 @@ struct bcma_drv_cc {
#ifdef CONFIG_BCMA_SFLASH
struct bcma_sflash sflash;
#endif
#ifdef CONFIG_BCMA_NFLASH
struct bcma_nflash nflash;
#endif
int nr_serial_ports;
struct bcma_serial_port serial_ports[4];