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hwmon: (pmbus) Virtualize pmbus_write_byte 

With virtual pages and to be able to handle more chips, it is necessary to
virtualise pmbus_write_byte().

Signed-off-by: Guenter Roeck <guenter.roeck@ericsson.com>
Reviewed-by: Robert Coulson <robert.coulson@ericsson.com>
hifive-unleashed-5.1
Guenter Roeck 2011-07-29 22:08:07 -07:00
parent 322a8b0340
commit 044cd3a574
2 changed files with 20 additions and 1 deletions
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1
drivers/hwmon/pmbus/pmbus.h
View File

@ -325,6 +325,7 @@ struct pmbus_driver_info {
int (*read_word_data)(struct i2c_client *client, int page, int reg);
int (*write_word_data)(struct i2c_client *client, int page, int reg,
u16 word);
int (*write_byte)(struct i2c_client *client, int page, u8 value);
/*
* The identify function determines supported PMBus functionality.
* This function is only necessary if a chip driver supports multiple

20
drivers/hwmon/pmbus/pmbus_core.c
View File

@ -182,6 +182,24 @@ int pmbus_write_byte(struct i2c_client *client, int page, u8 value)
}
EXPORT_SYMBOL_GPL(pmbus_write_byte);
/*
* _pmbus_write_byte() is similar to pmbus_write_byte(), but checks if
* a device specific mapping funcion exists and calls it if necessary.
*/
static int _pmbus_write_byte(struct i2c_client *client, int page, u8 value)
{
struct pmbus_data *data = i2c_get_clientdata(client);
const struct pmbus_driver_info *info = data->info;
int status;
if (info->write_byte) {
status = info->write_byte(client, page, value);
if (status != -ENODATA)
return status;
}
return pmbus_write_byte(client, page, value);
}
int pmbus_write_word_data(struct i2c_client *client, u8 page, u8 reg, u16 word)
{
int rv;
@ -281,7 +299,7 @@ static int _pmbus_read_byte_data(struct i2c_client *client, int page, int reg)
static void pmbus_clear_fault_page(struct i2c_client *client, int page)
{
pmbus_write_byte(client, page, PMBUS_CLEAR_FAULTS);
_pmbus_write_byte(client, page, PMBUS_CLEAR_FAULTS);
}
void pmbus_clear_faults(struct i2c_client *client)