diff options
Diffstat (limited to 'drivers/w1/slaves/w1_therm.c')
| -rw-r--r-- | drivers/w1/slaves/w1_therm.c | 21 |
1 files changed, 19 insertions, 2 deletions
diff --git a/drivers/w1/slaves/w1_therm.c b/drivers/w1/slaves/w1_therm.c index 8b5ff33f72cf..1f11a20a8ab9 100644 --- a/drivers/w1/slaves/w1_therm.c +++ b/drivers/w1/slaves/w1_therm.c @@ -27,6 +27,7 @@ #include <linux/sched.h> #include <linux/device.h> #include <linux/types.h> +#include <linux/slab.h> #include <linux/delay.h> #include "../w1.h" @@ -58,6 +59,19 @@ MODULE_ALIAS("w1-family-" __stringify(W1_THERM_DS28EA00)); static int w1_strong_pullup = 1; module_param_named(strong_pullup, w1_strong_pullup, int, 0); +static int w1_therm_add_slave(struct w1_slave *sl) +{ + sl->family_data = kzalloc(9, GFP_KERNEL); + if (!sl->family_data) + return -ENOMEM; + return 0; +} + +static void w1_therm_remove_slave(struct w1_slave *sl) +{ + kfree(sl->family_data); + sl->family_data = NULL; +} static ssize_t w1_slave_show(struct device *device, struct device_attribute *attr, char *buf); @@ -71,6 +85,8 @@ static struct attribute *w1_therm_attrs[] = { ATTRIBUTE_GROUPS(w1_therm); static struct w1_family_ops w1_therm_fops = { + .add_slave = w1_therm_add_slave, + .remove_slave = w1_therm_remove_slave, .groups = w1_therm_groups, }; @@ -253,12 +269,13 @@ static ssize_t w1_slave_show(struct device *device, c -= snprintf(buf + PAGE_SIZE - c, c, ": crc=%02x %s\n", crc, (verdict) ? "YES" : "NO"); if (verdict) - memcpy(sl->rom, rom, sizeof(sl->rom)); + memcpy(sl->family_data, rom, sizeof(rom)); else dev_warn(device, "Read failed CRC check\n"); for (i = 0; i < 9; ++i) - c -= snprintf(buf + PAGE_SIZE - c, c, "%02x ", sl->rom[i]); + c -= snprintf(buf + PAGE_SIZE - c, c, "%02x ", + ((u8 *)sl->family_data)[i]); c -= snprintf(buf + PAGE_SIZE - c, c, "t=%d\n", w1_convert_temp(rom, sl->family->fid)); |