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Commit 4ff0ce22 authored by Guenter Roeck's avatar Guenter Roeck
Browse files

hwmon: (pmbus/adm1275) Add support for ADM1272 



The chip is quite similar to other chips in the series,
but as usual it comes with its own quirks.

Signed-off-by: default avatarGuenter Roeck <linux@roeck-us.net>
parent 05993e22

Documentation/hwmon/adm1275

+12 −8
Original line number Diff line number Diff line
@@ -6,6 +6,10 @@ Supported chips: 
    Prefix: 'adm1075'

    Addresses scanned: -

    Datasheet: www.analog.com/static/imported-files/data_sheets/ADM1075.pdf

  * Analog Devices ADM1272

    Prefix: 'adm1272'

    Addresses scanned: -

    Datasheet: www.analog.com/static/imported-files/data_sheets/ADM1272.pdf

  * Analog Devices ADM1275

    Prefix: 'adm1275'

    Addresses scanned: -
@@ -29,11 +33,11 @@ Author: Guenter Roeck <linux@roeck-us.net> 
Description

-----------



This driver supports hardware monitoring for Analog Devices ADM1075, ADM1275,

ADM1276, ADM1278, ADM1293, and ADM1294 Hot-Swap Controller and Digital

Power Monitors.

This driver supports hardware monitoring for Analog Devices ADM1075, ADM1272,

ADM1275, ADM1276, ADM1278, ADM1293, and ADM1294 Hot-Swap Controller and

Digital Power Monitors.



ADM1075, ADM1275, ADM1276, ADM1278, ADM1293, and ADM1294 are hot-swap

ADM1075, ADM1272, ADM1275, ADM1276, ADM1278, ADM1293, and ADM1294 are hot-swap

controllers that allow a circuit board to be removed from or inserted into

a live backplane. They also feature current and voltage readback via an

integrated 12 bit analog-to-digital converter (ADC), accessed using a
@@ -100,11 +104,10 @@ power1_input_lowest Lowest observed input power. ADM1293 and ADM1294 only. 
power1_input_highest	Highest observed input power.

power1_reset_history	Write any value to reset history.



			Power attributes are supported on ADM1075, ADM1276,

			ADM1293, and ADM1294.

			Power attributes are supported on ADM1075, ADM1272,

			ADM1276, ADM1293, and ADM1294.



temp1_input		Chip temperature.

			Temperature attributes are only available on ADM1278.

temp1_max		Maximum chip temperature.

temp1_max_alarm		Temperature alarm.

temp1_crit		Critical chip temperature.
@@ -112,4 +115,5 @@ temp1_crit_alarm Critical temperature high alarm. 
temp1_highest		Highest observed temperature.

temp1_reset_history	Write any value to reset history.



			Temperature attributes are supported on ADM1278.
 
			Temperature attributes are supported on ADM1272 and

			ADM1278.

drivers/hwmon/pmbus/Kconfig

+2 −2
Original line number Diff line number Diff line
@@ -31,8 +31,8 @@ config SENSORS_ADM1275 
	default n

	help

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

	  Devices ADM1075, ADM1275, ADM1276, ADM1278, ADM1293, and ADM1294

	  Hot-Swap Controller and Digital Power Monitors.

	  Devices ADM1075, ADM1272, ADM1275, ADM1276, ADM1278, ADM1293,

	  and ADM1294 Hot-Swap Controller and Digital Power Monitors.



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

	  be called adm1275.

drivers/hwmon/pmbus/adm1275.c

+66 −1
Original line number Diff line number Diff line
@@ -3,6 +3,7 @@ 
 * and Digital Power Monitor

 *

 * Copyright (c) 2011 Ericsson AB.

 * Copyright (c) 2018 Guenter Roeck

 *

 * This program is free software; you can redistribute it and/or modify

 * it under the terms of the GNU General Public License as published by
@@ -24,7 +25,7 @@ 
#include <linux/bitops.h>

#include "pmbus.h"



enum chips { adm1075, adm1275, adm1276, adm1278, adm1293, adm1294 };

enum chips { adm1075, adm1272, adm1275, adm1276, adm1278, adm1293, adm1294 };



#define ADM1275_MFR_STATUS_IOUT_WARN2	BIT(0)

#define ADM1293_MFR_STATUS_VAUX_UV_WARN	BIT(5)
@@ -41,6 +42,8 @@ enum chips { adm1075, adm1275, adm1276, adm1278, adm1293, adm1294 }; 
#define ADM1075_IRANGE_25		BIT(3)

#define ADM1075_IRANGE_MASK		(BIT(3) | BIT(4))



#define ADM1272_IRANGE			BIT(0)



#define ADM1278_TEMP1_EN		BIT(3)

#define ADM1278_VIN_EN			BIT(2)

#define ADM1278_VOUT_EN			BIT(1)
@@ -105,6 +108,19 @@ static const struct coefficients adm1075_coefficients[] = { 
	[4] = { 4279, 0, -1 },		/* power, irange50 */

};



static const struct coefficients adm1272_coefficients[] = {

	[0] = { 6770, 0, -2 },		/* voltage, vrange 60V */

	[1] = { 4062, 0, -2 },		/* voltage, vrange 100V */

	[2] = { 1326, 20480, -1 },	/* current, vsense range 15mV */

	[3] = { 663, 20480, -1 },	/* current, vsense range 30mV */

	[4] = { 3512, 0, -2 },		/* power, vrange 60V, irange 15mV */

	[5] = { 21071, 0, -3 },		/* power, vrange 100V, irange 15mV */

	[6] = { 17561, 0, -3 },		/* power, vrange 60V, irange 30mV */

	[7] = { 10535, 0, -3 },		/* power, vrange 100V, irange 30mV */

	[8] = { 42, 31871, -1 },	/* temperature */



};



static const struct coefficients adm1275_coefficients[] = {

	[0] = { 19199, 0, -2 },		/* voltage, vrange set */

	[1] = { 6720, 0, -1 },		/* voltage, vrange not set */
@@ -335,6 +351,7 @@ static int adm1275_read_byte_data(struct i2c_client *client, int page, int reg) 


static const struct i2c_device_id adm1275_id[] = {

	{ "adm1075", adm1075 },

	{ "adm1272", adm1272 },

	{ "adm1275", adm1275 },

	{ "adm1276", adm1276 },

	{ "adm1278", adm1278 },
@@ -451,6 +468,54 @@ static int adm1275_probe(struct i2c_client *client, 
			info->func[0] |=

			  PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT;

		break;

	case adm1272:

		data->have_vout = true;

		data->have_pin_max = true;

		data->have_temp_max = true;



		coefficients = adm1272_coefficients;

		vindex = (config & ADM1275_VRANGE) ? 1 : 0;

		cindex = (config & ADM1272_IRANGE) ? 3 : 2;

		/* pindex depends on the combination of the above */

		switch (config & (ADM1275_VRANGE | ADM1272_IRANGE)) {

		case 0:

		default:

			pindex = 4;

			break;

		case ADM1275_VRANGE:

			pindex = 5;

			break;

		case ADM1272_IRANGE:

			pindex = 6;

			break;

		case ADM1275_VRANGE | ADM1272_IRANGE:

			pindex = 7;

			break;

		}

		tindex = 8;



		info->func[0] |= PMBUS_HAVE_PIN | PMBUS_HAVE_STATUS_INPUT |

			PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT;



		/* Enable VOUT if not enabled (it is disabled by default) */

		if (!(config & ADM1278_VOUT_EN)) {

			config |= ADM1278_VOUT_EN;

			ret = i2c_smbus_write_byte_data(client,

							ADM1275_PMON_CONFIG,

							config);

			if (ret < 0) {

				dev_err(&client->dev,

					"Failed to enable VOUT monitoring\n");

				return -ENODEV;

			}

		}



		if (config & ADM1278_TEMP1_EN)

			info->func[0] |=

				PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP;

		if (config & ADM1278_VIN_EN)

			info->func[0] |= PMBUS_HAVE_VIN;

		break;

	case adm1275:

		if (device_config & ADM1275_IOUT_WARN2_SELECT)

			data->have_oc_fault = true;