diff options
Diffstat (limited to 'drivers/mtd/devices')
| -rw-r--r-- | drivers/mtd/devices/m25p80.c | 33 |
1 files changed, 17 insertions, 16 deletions
diff --git a/drivers/mtd/devices/m25p80.c b/drivers/mtd/devices/m25p80.c index 78c2511ae9e..7eaa61862a0 100644 --- a/drivers/mtd/devices/m25p80.c +++ b/drivers/mtd/devices/m25p80.c @@ -19,16 +19,17 @@ #include <linux/module.h> #include <linux/device.h> #include <linux/interrupt.h> -#include <linux/interrupt.h> +#include <linux/mutex.h> + #include <linux/mtd/mtd.h> #include <linux/mtd/partitions.h> + #include <linux/spi/spi.h> #include <linux/spi/flash.h> -#include <asm/semaphore.h> - /* NOTE: AT 25F and SST 25LF series are very similar, + * as are other newer Atmel dataflash chips (AT26), * but commands for sector erase and chip id differ... */ @@ -65,7 +66,7 @@ struct m25p { struct spi_device *spi; - struct semaphore lock; + struct mutex lock; struct mtd_info mtd; unsigned partitioned; u8 command[4]; @@ -201,13 +202,13 @@ static int m25p80_erase(struct mtd_info *mtd, struct erase_info *instr) addr = instr->addr; len = instr->len; - down(&flash->lock); + mutex_lock(&flash->lock); /* now erase those sectors */ while (len) { if (erase_sector(flash, addr)) { instr->state = MTD_ERASE_FAILED; - up(&flash->lock); + mutex_unlock(&flash->lock); return -EIO; } @@ -215,7 +216,7 @@ static int m25p80_erase(struct mtd_info *mtd, struct erase_info *instr) len -= mtd->erasesize; } - up(&flash->lock); + mutex_unlock(&flash->lock); instr->state = MTD_ERASE_DONE; mtd_erase_callback(instr); @@ -260,12 +261,12 @@ static int m25p80_read(struct mtd_info *mtd, loff_t from, size_t len, if (retlen) *retlen = 0; - down(&flash->lock); + mutex_lock(&flash->lock); /* Wait till previous write/erase is done. */ if (wait_till_ready(flash)) { /* REVISIT status return?? */ - up(&flash->lock); + mutex_unlock(&flash->lock); return 1; } @@ -281,7 +282,7 @@ static int m25p80_read(struct mtd_info *mtd, loff_t from, size_t len, *retlen = m.actual_length - sizeof(flash->command); - up(&flash->lock); + mutex_unlock(&flash->lock); return 0; } @@ -323,7 +324,7 @@ static int m25p80_write(struct mtd_info *mtd, loff_t to, size_t len, t[1].tx_buf = buf; spi_message_add_tail(&t[1], &m); - down(&flash->lock); + mutex_lock(&flash->lock); /* Wait until finished previous write command. */ if (wait_till_ready(flash)) @@ -381,10 +382,10 @@ static int m25p80_write(struct mtd_info *mtd, loff_t to, size_t len, if (retlen) *retlen += m.actual_length - sizeof(flash->command); - } - } + } + } - up(&flash->lock); + mutex_unlock(&flash->lock); return 0; } @@ -405,7 +406,7 @@ struct flash_info { }; static struct flash_info __devinitdata m25p_data [] = { - /* REVISIT: fill in JEDEC ids, for parts that have them */ + /* JEDEC id zero means "has no ID" */ { "m25p05", 0x05, 0x2010, 32 * 1024, 2 }, { "m25p10", 0x10, 0x2011, 32 * 1024, 4 }, { "m25p20", 0x11, 0x2012, 64 * 1024, 4 }, @@ -456,7 +457,7 @@ static int __devinit m25p_probe(struct spi_device *spi) return -ENOMEM; flash->spi = spi; - init_MUTEX(&flash->lock); + mutex_init(&flash->lock); dev_set_drvdata(&spi->dev, flash); if (data->name) |