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authorDaniel Mack <daniel@caiaq.de>2009-04-28 04:55:01 -0400
committerAnton Vorontsov <cbouatmailru@gmail.com>2009-06-08 15:25:17 -0400
commit0b47b5703b1cc6c3aa89663ac70e28dadedf6ccc (patch)
tree5228eb4071c4f4774c8197b8615dc001e9626665
parentae9fb6e814ecede683bcd404910085cea3ab1260 (diff)
w1: ds2760: add support for EEPROM read and write
In order to modify the DS2762's status registers and to add support for sleep mode, there is need for functions to write the internal EEPROM. Signed-off-by: Daniel Mack <daniel@caiaq.de> Acked-by: Matt Reimer <mreimer@vpop.net> Acked-by: Szabolcs Gyurko <szabolcs.gyurko@tlt.hu> Acked-by: Evgeniy Polyakov <zbr@ioremap.net> Signed-off-by: Anton Vorontsov <cbouatmailru@gmail.com>
-rw-r--r--drivers/w1/slaves/w1_ds2760.c30
-rw-r--r--drivers/w1/slaves/w1_ds2760.h2
2 files changed, 32 insertions, 0 deletions
diff --git a/drivers/w1/slaves/w1_ds2760.c b/drivers/w1/slaves/w1_ds2760.c
index 1f09d4e4144c..59f708efe25f 100644
--- a/drivers/w1/slaves/w1_ds2760.c
+++ b/drivers/w1/slaves/w1_ds2760.c
@@ -68,6 +68,34 @@ int w1_ds2760_write(struct device *dev, char *buf, int addr, size_t count)
68 return w1_ds2760_io(dev, buf, addr, count, 1); 68 return w1_ds2760_io(dev, buf, addr, count, 1);
69} 69}
70 70
71static int w1_ds2760_eeprom_cmd(struct device *dev, int addr, int cmd)
72{
73 struct w1_slave *sl = container_of(dev, struct w1_slave, dev);
74
75 if (!dev)
76 return -EINVAL;
77
78 mutex_lock(&sl->master->mutex);
79
80 if (w1_reset_select_slave(sl) == 0) {
81 w1_write_8(sl->master, cmd);
82 w1_write_8(sl->master, addr);
83 }
84
85 mutex_unlock(&sl->master->mutex);
86 return 0;
87}
88
89int w1_ds2760_store_eeprom(struct device *dev, int addr)
90{
91 return w1_ds2760_eeprom_cmd(dev, addr, W1_DS2760_COPY_DATA);
92}
93
94int w1_ds2760_recall_eeprom(struct device *dev, int addr)
95{
96 return w1_ds2760_eeprom_cmd(dev, addr, W1_DS2760_RECALL_DATA);
97}
98
71static ssize_t w1_ds2760_read_bin(struct kobject *kobj, 99static ssize_t w1_ds2760_read_bin(struct kobject *kobj,
72 struct bin_attribute *bin_attr, 100 struct bin_attribute *bin_attr,
73 char *buf, loff_t off, size_t count) 101 char *buf, loff_t off, size_t count)
@@ -200,6 +228,8 @@ static void __exit w1_ds2760_exit(void)
200 228
201EXPORT_SYMBOL(w1_ds2760_read); 229EXPORT_SYMBOL(w1_ds2760_read);
202EXPORT_SYMBOL(w1_ds2760_write); 230EXPORT_SYMBOL(w1_ds2760_write);
231EXPORT_SYMBOL(w1_ds2760_store_eeprom);
232EXPORT_SYMBOL(w1_ds2760_recall_eeprom);
203 233
204module_init(w1_ds2760_init); 234module_init(w1_ds2760_init);
205module_exit(w1_ds2760_exit); 235module_exit(w1_ds2760_exit);
diff --git a/drivers/w1/slaves/w1_ds2760.h b/drivers/w1/slaves/w1_ds2760.h
index f1302429cb02..ea39419172a6 100644
--- a/drivers/w1/slaves/w1_ds2760.h
+++ b/drivers/w1/slaves/w1_ds2760.h
@@ -46,5 +46,7 @@ extern int w1_ds2760_read(struct device *dev, char *buf, int addr,
46 size_t count); 46 size_t count);
47extern int w1_ds2760_write(struct device *dev, char *buf, int addr, 47extern int w1_ds2760_write(struct device *dev, char *buf, int addr,
48 size_t count); 48 size_t count);
49extern int w1_ds2760_store_eeprom(struct device *dev, int addr);
50extern int w1_ds2760_recall_eeprom(struct device *dev, int addr);
49 51
50#endif /* !__w1_ds2760_h__ */ 52#endif /* !__w1_ds2760_h__ */