The chip's programming interface is quite similar to LTC3880
and supports the same set of sensors.
Reviewed-by: NRobert Coulson <rob.coulson@gmail.com>
Signed-off-by: NGuenter Roeck <linux@roeck-us.net>

LTC2974 datasheet revision C lists the chip ID for LTC2974 as 0x0213.
Reviewed-by: NRobert Coulson <rob.coulson@gmail.com>
Signed-off-by: NGuenter Roeck <linux@roeck-us.net>

Detect LTC2978A chip ID. Treat it as LC2978.
Signed-off-by: NGuenter Roeck <linux@roeck-us.net>

LTC2977 is a pin compatible replacement for LTC2978.
Signed-off-by: NGuenter Roeck <linux@roeck-us.net>

Signed-off-by: NGuenter Roeck <linux@roeck-us.net>

Use u16 instead of int to store cached limit attributes.
This reduces allocated data size per driver instance by 48 bytes.
Use defines for the number of pages supported by individual chips.
Use ARRAY_SIZE for loops to initialize array variables, and
initialize all variables in the same code block.
Signed-off-by: NGuenter Roeck <linux@roeck-us.net>

On LTC2978, only READ_TEMPERATURE is supported. It reports
the internal junction temperature. This register is unpaged.

On LTC3880, READ_TEMPERATURE and READ_TEMPERATURE2 are supported.
READ_TEMPERATURE is paged and reports external temperatures.
READ_TEMPERATURE2 is unpaged and reports the internal junction
temperature.
Signed-off-by: NGuenter Roeck <linux@roeck-us.net>
Cc: stable@vger.kernel.org # 3.2+
Acked-by: NJean Delvare <khali@linux-fr.org>

We read the chip ID from the chip, use it to determine if the chip ID provided
to the driver is correct, and report it if wrong. We should also use the
correct chip ID to select supported functionality.
Signed-off-by: NGuenter Roeck <linux@roeck-us.net>
Cc: stable@vger.kernel.org # 3.2+
Acked-by: NJean Delvare <khali@linux-fr.org>

Peak attributes were not initialized and cleared correctly.
Also, temp2_max is only supported on page 0 and thus does not need to be
an array.
Signed-off-by: NGuenter Roeck <linux@roeck-us.net>
Cc: stable@vger.kernel.org # 3.2+
Acked-by: NJean Delvare <khali@linux-fr.org>

Since devm_kzalloc() is now used to allocate driver memory, the client
driver remove function has no purpose other than to call pmbus_do_remove().
This means we can get rid of it by redefining pmbus_do_remove() to use the
same prototype, and pointing to it directly.
Signed-off-by: NGuenter Roeck <linux@roeck-us.net>

Marginally less code and eliminate the possibility of memory leaks.
Signed-off-by: NGuenter Roeck <linux@roeck-us.net>

This patch converts the drivers in drivers/hwmon/* to use the
module_i2c_driver() macro which makes the code smaller and a bit simpler.
Signed-off-by: NAxel Lin <axel.lin@gmail.com>
Cc: Corentin Labbe <corentin.labbe@geomatys.fr>
Cc: Dirk Eibach <eibach@gdsys.de>
Cc: "Mark M. Hoffman" <mhoffman@lightlink.com>
Cc: Steve Glendinning <steve.glendinning@smsc.com>
Cc: Riku Voipio <riku.voipio@iki.fi>
Cc: Guillaume Ligneul <guillaume.ligneul@gmail.com>
Cc: David George <david.george@ska.ac.za>
Cc: "Hans J. Koch" <hjk@hansjkoch.de>
Cc: Marc Hulsman <m.hulsman@tudelft.nl>
Cc: Rudolf Marek <r.marek@assembler.cz>
Signed-off-by: NGuenter Roeck <guenter.roeck@ericsson.com>

The LTC3880 PMBus command set is comparable to LTC2978. Add support for it
to the LTC2978 driver.
Signed-off-by: NGuenter Roeck <guenter.roeck@ericsson.com>
Reviewed-by: NRobert Coulson <robert.coulson@ericsson.com>

Provide explicit driver for LTC2978 to enable support for minimum and peak
attributes. Remove ltc2978 chip id from generic pmbus driver.
Signed-off-by: NGuenter Roeck <guenter.roeck@ericsson.com>
Reviewed-by: NRobert Coulson <robert.coulson@ericsson.com>