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authorGuenter Roeck <linux@roeck-us.net>2013-01-26 15:15:37 -0800
committerGuenter Roeck <linux@roeck-us.net>2013-02-06 09:58:04 -0800
commitce603b18f30aea1216a00673a33805d4f5a5e16b (patch)
treed96326369050cf4e63388a07125bd0a9884d3846 /drivers/hwmon/pmbus
parentaebcbbfc4955929286a15a04592a2281d3e527db (diff)
downloadlinux-ce603b18f30aea1216a00673a33805d4f5a5e16b.tar.bz2
hwmon: (pmbus) Add function to clear sensor cache
For PMBus chips, modifying one limit register may affect other limits. Since limits are all cached in the PMBus core driver, related changes are not reflected in reported limits. Introduce function to clear the attribute cache. After calling this function, the core pmbus driver re-reads all cached values. Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Diffstat (limited to 'drivers/hwmon/pmbus')
-rw-r--r--drivers/hwmon/pmbus/pmbus.h1
-rw-r--r--drivers/hwmon/pmbus/pmbus_core.c8
2 files changed, 9 insertions, 0 deletions
diff --git a/drivers/hwmon/pmbus/pmbus.h b/drivers/hwmon/pmbus/pmbus.h
index 164d17706486..fa9beb3eb60c 100644
--- a/drivers/hwmon/pmbus/pmbus.h
+++ b/drivers/hwmon/pmbus/pmbus.h
@@ -369,6 +369,7 @@ struct pmbus_driver_info {
/* Function declarations */
+void pmbus_clear_cache(struct i2c_client *client);
int pmbus_set_page(struct i2c_client *client, u8 page);
int pmbus_read_word_data(struct i2c_client *client, u8 page, u8 reg);
int pmbus_write_word_data(struct i2c_client *client, u8 page, u8 reg, u16 word);
diff --git a/drivers/hwmon/pmbus/pmbus_core.c b/drivers/hwmon/pmbus/pmbus_core.c
index 3b5c24dd0b75..32f4530cd1e8 100644
--- a/drivers/hwmon/pmbus/pmbus_core.c
+++ b/drivers/hwmon/pmbus/pmbus_core.c
@@ -113,6 +113,14 @@ struct pmbus_data {
u8 currpage;
};
+void pmbus_clear_cache(struct i2c_client *client)
+{
+ struct pmbus_data *data = i2c_get_clientdata(client);
+
+ data->valid = false;
+}
+EXPORT_SYMBOL_GPL(pmbus_clear_cache);
+
int pmbus_set_page(struct i2c_client *client, u8 page)
{
struct pmbus_data *data = i2c_get_clientdata(client);