diff options
| -rw-r--r-- | drivers/mtd/mtdchar.c | 7 | ||||
| -rw-r--r-- | drivers/mtd/mtdcore.c | 12 | ||||
| -rw-r--r-- | include/linux/mtd/mtd.h | 3 | ||||
| -rw-r--r-- | include/uapi/mtd/mtd-abi.h | 2 |
4 files changed, 23 insertions, 1 deletions
diff --git a/drivers/mtd/mtdchar.c b/drivers/mtd/mtdchar.c index 870f7a19ad9d..155e991d9d75 100644 --- a/drivers/mtd/mtdchar.c +++ b/drivers/mtd/mtdchar.c @@ -666,6 +666,7 @@ static int mtdchar_ioctl(struct file *file, u_int cmd, u_long arg) case MEMWRITEOOB64: case MEMWRITE: case OTPLOCK: + case OTPERASE: if (!(file->f_mode & FMODE_WRITE)) return -EPERM; break; @@ -930,6 +931,7 @@ static int mtdchar_ioctl(struct file *file, u_int cmd, u_long arg) } case OTPLOCK: + case OTPERASE: { struct otp_info oinfo; @@ -937,7 +939,10 @@ static int mtdchar_ioctl(struct file *file, u_int cmd, u_long arg) return -EINVAL; if (copy_from_user(&oinfo, argp, sizeof(oinfo))) return -EFAULT; - ret = mtd_lock_user_prot_reg(mtd, oinfo.start, oinfo.length); + if (cmd == OTPLOCK) + ret = mtd_lock_user_prot_reg(mtd, oinfo.start, oinfo.length); + else + ret = mtd_erase_user_prot_reg(mtd, oinfo.start, oinfo.length); break; } diff --git a/drivers/mtd/mtdcore.c b/drivers/mtd/mtdcore.c index 38782ceea1f6..aea58366a94e 100644 --- a/drivers/mtd/mtdcore.c +++ b/drivers/mtd/mtdcore.c @@ -1919,6 +1919,18 @@ int mtd_lock_user_prot_reg(struct mtd_info *mtd, loff_t from, size_t len) } EXPORT_SYMBOL_GPL(mtd_lock_user_prot_reg); +int mtd_erase_user_prot_reg(struct mtd_info *mtd, loff_t from, size_t len) +{ + struct mtd_info *master = mtd_get_master(mtd); + + if (!master->_erase_user_prot_reg) + return -EOPNOTSUPP; + if (!len) + return 0; + return master->_erase_user_prot_reg(master, from, len); +} +EXPORT_SYMBOL_GPL(mtd_erase_user_prot_reg); + /* Chip-supported device locking */ int mtd_lock(struct mtd_info *mtd, loff_t ofs, uint64_t len) { diff --git a/include/linux/mtd/mtd.h b/include/linux/mtd/mtd.h index ceabc2cae8a4..4aac200ca8b5 100644 --- a/include/linux/mtd/mtd.h +++ b/include/linux/mtd/mtd.h @@ -337,6 +337,8 @@ struct mtd_info { size_t len, size_t *retlen, u_char *buf); int (*_lock_user_prot_reg) (struct mtd_info *mtd, loff_t from, size_t len); + int (*_erase_user_prot_reg) (struct mtd_info *mtd, loff_t from, + size_t len); int (*_writev) (struct mtd_info *mtd, const struct kvec *vecs, unsigned long count, loff_t to, size_t *retlen); void (*_sync) (struct mtd_info *mtd); @@ -518,6 +520,7 @@ int mtd_read_user_prot_reg(struct mtd_info *mtd, loff_t from, size_t len, int mtd_write_user_prot_reg(struct mtd_info *mtd, loff_t to, size_t len, size_t *retlen, u_char *buf); int mtd_lock_user_prot_reg(struct mtd_info *mtd, loff_t from, size_t len); +int mtd_erase_user_prot_reg(struct mtd_info *mtd, loff_t from, size_t len); int mtd_writev(struct mtd_info *mtd, const struct kvec *vecs, unsigned long count, loff_t to, size_t *retlen); diff --git a/include/uapi/mtd/mtd-abi.h b/include/uapi/mtd/mtd-abi.h index 65b9db936557..b869990c2db2 100644 --- a/include/uapi/mtd/mtd-abi.h +++ b/include/uapi/mtd/mtd-abi.h @@ -205,6 +205,8 @@ struct otp_info { * without OOB, e.g., NOR flash. */ #define MEMWRITE _IOWR('M', 24, struct mtd_write_req) +/* Erase a given range of user data (must be in mode %MTD_FILE_MODE_OTP_USER) */ +#define OTPERASE _IOW('M', 25, struct otp_info) /* * Obsolete legacy interface. Keep it in order not to break userspace |