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hwmon: (pmbus) Add function to clear sensor cache

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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>
This commit is contained in:
Guenter Roeck 2013-01-26 15:15:37 -08:00
parent aebcbbfc49
commit ce603b18f3
2 changed files with 9 additions and 0 deletions
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1
drivers/hwmon/pmbus/pmbus.h
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@ -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);

8
drivers/hwmon/pmbus/pmbus_core.c
View file

@ -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);