diff options
Diffstat (limited to 'drivers/w1')
-rw-r--r-- | drivers/w1/w1.c | 69 | ||||
-rw-r--r-- | drivers/w1/w1.h | 2 |
2 files changed, 69 insertions, 2 deletions
diff --git a/drivers/w1/w1.c b/drivers/w1/w1.c index a698b51..c9486c1 100644 --- a/drivers/w1/w1.c +++ b/drivers/w1/w1.c @@ -139,7 +139,74 @@ static struct bin_attribute w1_slave_attr_bin_id = { }; /* Default family */ -static struct w1_family w1_default_family; + +static ssize_t w1_default_write(struct kobject *kobj, char *buf, loff_t off, size_t count) +{ + struct w1_slave *sl = kobj_to_w1_slave(kobj); + + if (down_interruptible(&sl->master->mutex)) { + count = 0; + goto out; + } + + if (w1_reset_select_slave(sl)) { + count = 0; + goto out_up; + } + + w1_write_block(sl->master, buf, count); + +out_up: + up(&sl->master->mutex); +out: + return count; +} + +static ssize_t w1_default_read(struct kobject *kobj, char *buf, loff_t off, size_t count) +{ + struct w1_slave *sl = kobj_to_w1_slave(kobj); + + if (down_interruptible(&sl->master->mutex)) { + count = 0; + goto out; + } + + w1_read_block(sl->master, buf, count); + + up(&sl->master->mutex); +out: + return count; +} + +static struct bin_attribute w1_default_attr = { + .attr = { + .name = "rw", + .mode = S_IRUGO | S_IWUSR, + .owner = THIS_MODULE, + }, + .size = PAGE_SIZE, + .read = w1_default_read, + .write = w1_default_write, +}; + +static int w1_default_add_slave(struct w1_slave *sl) +{ + return sysfs_create_bin_file(&sl->dev.kobj, &w1_default_attr); +} + +static void w1_default_remove_slave(struct w1_slave *sl) +{ + sysfs_remove_bin_file(&sl->dev.kobj, &w1_default_attr); +} + +static struct w1_family_ops w1_default_fops = { + .add_slave = w1_default_add_slave, + .remove_slave = w1_default_remove_slave, +}; + +static struct w1_family w1_default_family = { + .fops = &w1_default_fops, +}; static int w1_uevent(struct device *dev, char **envp, int num_envp, char *buffer, int buffer_size); diff --git a/drivers/w1/w1.h b/drivers/w1/w1.h index 5698050..02e8cad 100644 --- a/drivers/w1/w1.h +++ b/drivers/w1/w1.h @@ -60,7 +60,7 @@ struct w1_reg_num #define W1_READ_PSUPPLY 0xB4 #define W1_MATCH_ROM 0x55 -#define W1_SLAVE_ACTIVE (1<<0) +#define W1_SLAVE_ACTIVE 0 struct w1_slave { |