Commit d0cd9785 authored by Marcello Sylvester Bauer's avatar Marcello Sylvester Bauer Committed by Guenter Roeck
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hwmon: (pmbus) Add support for pli1209bc 



PLI1209BC is a Digital Supervisor from Vicor Corporation.

Signed-off-by: default avatarMarcello Sylvester Bauer <sylv@sylv.io>
Link: https://lore.kernel.org/r/4e016e66275bc46c90974aec18b150c874e64787.1645435888.git.sylv@sylv.io


Signed-off-by: default avatarGuenter Roeck <linux@roeck-us.net>
parent b7b94f15

Documentation/hwmon/index.rst

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@@ -161,6 +161,7 @@ Hardware Monitoring Kernel Drivers 
   pc87427

   pcf8591

   pim4328

   pli1209bc

   pm6764tr

   pmbus

   powr1220

Documentation/hwmon/pli1209bc.rst

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.. SPDX-License-Identifier: GPL-2.0



Kernel driver pli1209bc

=======================



Supported chips:



  * Digital Supervisor PLI1209BC



    Prefix: 'pli1209bc'



    Addresses scanned: 0x50 - 0x5F



    Datasheet: https://www.vicorpower.com/documents/datasheets/ds-PLI1209BCxyzz-VICOR.pdf



Authors:

    - Marcello Sylvester Bauer <sylv@sylv.io>



Description

-----------



The Vicor PLI1209BC is an isolated digital power system supervisor that provides

a communication interface between a host processor and one Bus Converter Module

(BCM). The PLI communicates with a system controller via a PMBus compatible

interface over an isolated UART interface. Through the PLI, the host processor

can configure, set protection limits, and monitor the BCM.



Sysfs entries

-------------



======================= ========================================================

in1_label		"vin2"

in1_input		Input voltage.

in1_rated_min		Minimum rated input voltage.

in1_rated_max		Maximum rated input voltage.

in1_max			Maximum input voltage.

in1_max_alarm		Input voltage high alarm.

in1_crit		Critical input voltage.

in1_crit_alarm		Input voltage critical alarm.



in2_label		"vout2"

in2_input		Output voltage.

in2_rated_min		Minimum rated output voltage.

in2_rated_max		Maximum rated output voltage.

in2_alarm		Output voltage alarm



curr1_label		"iin2"

curr1_input		Input current.

curr1_max		Maximum input current.

curr1_max_alarm		Maximum input current high alarm.

curr1_crit		Critical input current.

curr1_crit_alarm	Input current critical alarm.



curr2_label		"iout2"

curr2_input		Output current.

curr2_crit		Critical output current.

curr2_crit_alarm	Output current critical alarm.

curr2_max		Maximum output current.

curr2_max_alarm		Output current high alarm.



power1_label		"pin2"

power1_input		Input power.

power1_alarm		Input power alarm.



power2_label		"pout2"

power2_input		Output power.

power2_rated_max	Maximum rated output power.



temp1_input		Die temperature.

temp1_alarm		Die temperature alarm.

temp1_max		Maximum die temperature.

temp1_max_alarm		Die temperature high alarm.

temp1_crit		Critical die temperature.

temp1_crit_alarm	Die temperature critical alarm.

======================= ========================================================

drivers/hwmon/pmbus/Kconfig

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@@ -317,6 +317,15 @@ config SENSORS_PIM4328 
	  This driver can also be built as a module. If so, the module will

	  be called pim4328.



config SENSORS_PLI1209BC

	tristate "Vicor PLI1209BC"

	help

	  If you say yes here you get hardware monitoring support for Vicor

	  PLI1209BC Digital Supervisor.



	  This driver can also be built as a module. If so, the module will

	  be called pli1209bc.



config SENSORS_PM6764TR

	tristate "ST PM6764TR"

	help

drivers/hwmon/pmbus/Makefile

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@@ -33,6 +33,7 @@ obj-$(CONFIG_SENSORS_MAX8688) += max8688.o 
obj-$(CONFIG_SENSORS_MP2888)	+= mp2888.o

obj-$(CONFIG_SENSORS_MP2975)	+= mp2975.o

obj-$(CONFIG_SENSORS_MP5023)	+= mp5023.o

obj-$(CONFIG_SENSORS_PLI1209BC)	+= pli1209bc.o

obj-$(CONFIG_SENSORS_PM6764TR)	+= pm6764tr.o

obj-$(CONFIG_SENSORS_PXE1610)	+= pxe1610.o

obj-$(CONFIG_SENSORS_Q54SJ108A2)	+= q54sj108a2.o

drivers/hwmon/pmbus/pli1209bc.c

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// SPDX-License-Identifier: GPL-2.0+

/*

 * Hardware monitoring driver for Vicor PLI1209BC Digital Supervisor

 *

 * Copyright (c) 2022 9elements GmbH

 */



#include <linux/i2c.h>

#include <linux/module.h>

#include <linux/pmbus.h>

#include "pmbus.h"



/*

 * The capability command is only supported at page 0. Probing the device while

 * the page register is set to 1 will falsely enable PEC support. Disable

 * capability probing accordingly, since the PLI1209BC does not have any

 * additional capabilities.

 */

static struct pmbus_platform_data pli1209bc_plat_data = {

	.flags = PMBUS_NO_CAPABILITY,

};



static int pli1209bc_read_word_data(struct i2c_client *client, int page,

				    int phase, int reg)

{

	int data;



	switch (reg) {

	/* PMBUS_READ_POUT uses a direct format with R=0 */

	case PMBUS_READ_POUT:

		data = pmbus_read_word_data(client, page, phase, reg);

		if (data < 0)

			return data;

		data = sign_extend32(data, 15) * 10;

		return clamp_val(data, -32768, 32767) & 0xffff;

	default:

		return -ENODATA;

	}

}



static struct pmbus_driver_info pli1209bc_info = {

	.pages = 2,

	.format[PSC_VOLTAGE_IN] = direct,

	.format[PSC_VOLTAGE_OUT] = direct,

	.format[PSC_CURRENT_IN] = direct,

	.format[PSC_CURRENT_OUT] = direct,

	.format[PSC_POWER] = direct,

	.format[PSC_TEMPERATURE] = direct,

	.m[PSC_VOLTAGE_IN] = 1,

	.b[PSC_VOLTAGE_IN] = 0,

	.R[PSC_VOLTAGE_IN] = 1,

	.m[PSC_VOLTAGE_OUT] = 1,

	.b[PSC_VOLTAGE_OUT] = 0,

	.R[PSC_VOLTAGE_OUT] = 1,

	.m[PSC_CURRENT_IN] = 1,

	.b[PSC_CURRENT_IN] = 0,

	.R[PSC_CURRENT_IN] = 3,

	.m[PSC_CURRENT_OUT] = 1,

	.b[PSC_CURRENT_OUT] = 0,

	.R[PSC_CURRENT_OUT] = 2,

	.m[PSC_POWER] = 1,

	.b[PSC_POWER] = 0,

	.R[PSC_POWER] = 1,

	.m[PSC_TEMPERATURE] = 1,

	.b[PSC_TEMPERATURE] = 0,

	.R[PSC_TEMPERATURE] = 0,

	/*

	 * Page 0 sums up all attributes except voltage readings.

	 * The pli1209 digital supervisor only contains a single BCM, making

	 * page 0 redundant.

	 */

	.func[1] = PMBUS_HAVE_VIN | PMBUS_HAVE_VOUT

	    | PMBUS_HAVE_IIN | PMBUS_HAVE_IOUT

	    | PMBUS_HAVE_PIN | PMBUS_HAVE_POUT

	    | PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP

	    | PMBUS_HAVE_STATUS_IOUT | PMBUS_HAVE_STATUS_INPUT,

	.read_word_data = pli1209bc_read_word_data,

};



static int pli1209bc_probe(struct i2c_client *client)

{

	client->dev.platform_data = &pli1209bc_plat_data;

	return pmbus_do_probe(client, &pli1209bc_info);

}



static const struct i2c_device_id pli1209bc_id[] = {

	{"pli1209bc", 0},

	{}

};



MODULE_DEVICE_TABLE(i2c, pli1209bc_id);



#ifdef CONFIG_OF

static const struct of_device_id pli1209bc_of_match[] = {

	{ .compatible = "vicor,pli1209bc" },

	{ },

};

MODULE_DEVICE_TABLE(of, pli1209bc_of_match);

#endif



static struct i2c_driver pli1209bc_driver = {

	.driver = {

		   .name = "pli1209bc",

		   .of_match_table = of_match_ptr(pli1209bc_of_match),

		   },

	.probe_new = pli1209bc_probe,

	.id_table = pli1209bc_id,

};



module_i2c_driver(pli1209bc_driver);



MODULE_AUTHOR("Marcello Sylvester Bauer <sylv@sylv.io>");

MODULE_DESCRIPTION("PMBus driver for Vicor PLI1209BC");

MODULE_LICENSE("GPL");

MODULE_IMPORT_NS(PMBUS);