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Commit 044cd3a5 authored by Guenter Roeck's avatar Guenter Roeck
Browse files

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: default avatarGuenter Roeck <guenter.roeck@ericsson.com>
Reviewed-by: default avatarRobert Coulson <robert.coulson@ericsson.com>
parent 322a8b03

drivers/hwmon/pmbus/pmbus.h

+1 −0
Original line number Diff line number Diff line
@@ -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

drivers/hwmon/pmbus/pmbus_core.c

+19 −1
Original line number Diff line number Diff line
@@ -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)