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hwmon: pmbus: mpq8785: Add support for MPM3695 family 

Add support for the Monolithic Power Systems MPM3695 family.
It contains four devices with suffixes: -10, -20, -25 and -100.
The device is PMBus compliant and shares characteristics with the
MPM82504.

MPM3695-25 has different VOLTAGE_SCALE_LOOP register size [11:0]
and therefore needs to have a separate compatible entry.

Tested with device tree based matching (MPM3695-10).

Signed-off-by: Pawel Dembicki <paweldembicki@gmail.com>
Link: https://lore.kernel.org/r/20250511035701.2607947-6-paweldembicki@gmail.com
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
This commit is contained in:
Pawel Dembicki 2025-05-11 05:55:48 +02:00 committed by Guenter Roeck
parent c27291468e
commit 8fcefe7812
2 changed files with 18 additions and 5 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

13
Documentation/hwmon/mpq8785.rst
View File

@ -5,6 +5,7 @@ Kernel driver mpq8785
Supported chips:
* MPS MPM3695 family
* MPS MPM82504
* MPS MPQ8785
@ -15,6 +16,14 @@ Author: Charles Hsu <ythsu0511@gmail.com>
Description
-----------
The MPM3695 family is a scalable, ultra-thin, fully integrated power module with
a PMBus interface. It offers a complete power solution that achieves up to
10A (-10 variant), 20A (-25 variant), 25A (-20 variant), 100A (-100 variant)
of output current with excellent load and line regulation across a wide input
voltage range. It operates at high efficiency over a wide load range, and can
be parallled to deliver higher current. Variants -10,-20 and -100 have different
voltage scale configuration register range (10 bits) than -25 version (11 bits).
The MPM82504 is a quad 25A, scalable, fully integrated power module with a PMBus
interface. The device offers a complete power solution that achieves up to 25A
per output channel. The MPM82504 has four output channels that can be paralleled
@ -42,10 +51,6 @@ Fully integrated protection features include over-current protection (OCP),
over-voltage protection (OVP), under-voltage protection (UVP), and
over-temperature protection (OTP).
All supported modules require a minimal number of readily available, standard
external components. The MPM82504 is available in a BGA (15mmx30mmx5.18mm)
package and the MPQ8785 is available in a TLGA (5mmx6mm) package.
Device compliant with:
- PMBus rev 1.3 interface.

10
drivers/hwmon/pmbus/mpq8785.c
View File

@ -12,9 +12,11 @@
#define MPM82504_READ_TEMPERATURE_1_SIGN_POS 9
enum chips { mpm82504, mpq8785 };
enum chips { mpm3695, mpm3695_25, mpm82504, mpq8785 };
static u16 voltage_scale_loop_max_val[] = {
[mpm3695] = GENMASK(9, 0),
[mpm3695_25] = GENMASK(11, 0),
[mpm82504] = GENMASK(9, 0),
[mpq8785] = GENMASK(10, 0),
};
@ -81,6 +83,8 @@ static struct pmbus_driver_info mpq8785_info = {
};
static const struct i2c_device_id mpq8785_id[] = {
{ "mpm3695", mpm3695 },
{ "mpm3695-25", mpm3695_25 },
{ "mpm82504", mpm82504 },
{ "mpq8785", mpq8785 },
{ },
@ -88,6 +92,8 @@ static const struct i2c_device_id mpq8785_id[] = {
MODULE_DEVICE_TABLE(i2c, mpq8785_id);
static const struct of_device_id __maybe_unused mpq8785_of_match[] = {
{ .compatible = "mps,mpm3695", .data = (void *)mpm3695 },
{ .compatible = "mps,mpm3695-25", .data = (void *)mpm3695_25 },
{ .compatible = "mps,mpm82504", .data = (void *)mpm82504 },
{ .compatible = "mps,mpq8785", .data = (void *)mpq8785 },
{}
@ -112,6 +118,8 @@ static int mpq8785_probe(struct i2c_client *client)
chip_id = (kernel_ulong_t)i2c_get_match_data(client);
switch (chip_id) {
case mpm3695:
case mpm3695_25:
case mpm82504:
info->format[PSC_VOLTAGE_OUT] = direct;
info->m[PSC_VOLTAGE_OUT] = 8;