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>
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@ -325,6 +325,7 @@ struct pmbus_driver_info {
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int (*read_word_data)(struct i2c_client *client, int page, int reg);
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int (*write_word_data)(struct i2c_client *client, int page, int reg,
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u16 word);
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int (*write_byte)(struct i2c_client *client, int page, u8 value);
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/*
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* The identify function determines supported PMBus functionality.
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* This function is only necessary if a chip driver supports multiple
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@ -182,6 +182,24 @@ int pmbus_write_byte(struct i2c_client *client, int page, u8 value)
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}
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EXPORT_SYMBOL_GPL(pmbus_write_byte);
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/*
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* _pmbus_write_byte() is similar to pmbus_write_byte(), but checks if
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* a device specific mapping funcion exists and calls it if necessary.
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*/
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static int _pmbus_write_byte(struct i2c_client *client, int page, u8 value)
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{
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struct pmbus_data *data = i2c_get_clientdata(client);
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const struct pmbus_driver_info *info = data->info;
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int status;
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if (info->write_byte) {
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status = info->write_byte(client, page, value);
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if (status != -ENODATA)
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return status;
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}
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return pmbus_write_byte(client, page, value);
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}
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int pmbus_write_word_data(struct i2c_client *client, u8 page, u8 reg, u16 word)
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{
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int rv;
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@ -281,7 +299,7 @@ static int _pmbus_read_byte_data(struct i2c_client *client, int page, int reg)
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static void pmbus_clear_fault_page(struct i2c_client *client, int page)
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{
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pmbus_write_byte(client, page, PMBUS_CLEAR_FAULTS);
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_pmbus_write_byte(client, page, PMBUS_CLEAR_FAULTS);
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}
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void pmbus_clear_faults(struct i2c_client *client)
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