Commit d387d88e authored by Zev Weiss's avatar Zev Weiss Committed by Guenter Roeck
Browse files

hwmon: (pmbus) Add Delta AHE-50DC fan control module driver 



This device is an integrated module of the Delta AHE-50DC Open19 power
shelf.  I haven't been able to procure any proper documentation for
it, but it seems to be a (somewhat minimally) PMBus-compliant device.
It provides four fan speeds, four temperatures (three standard and one
manufacturer-specific via a virtual second page), and a vin reading.

Signed-off-by: default avatarZev Weiss <zev@bewilderbeest.net>
Link: https://lore.kernel.org/r/20211208213703.2577-2-zev@bewilderbeest.net


Signed-off-by: default avatarGuenter Roeck <linux@roeck-us.net>
parent 130d1688

MAINTAINERS

+6 −0
Original line number Diff line number Diff line
@@ -5436,6 +5436,12 @@ W: https://linuxtv.org 
T:	git git://linuxtv.org/media_tree.git

F:	drivers/media/platform/sti/delta









DELTA AHE-50DC FAN CONTROL MODULE DRIVER









M:	Zev Weiss <zev@bewilderbeest.net>









L:	linux-hwmon@vger.kernel.org









S:	Maintained









F:	drivers/hwmon/pmbus/delta-ahe50dc-fan.c

















DELTA DPS920AB PSU DRIVER









M:	Robert Marko <robert.marko@sartura.hr>









L:	linux-hwmon@vger.kernel.org
































drivers/hwmon/pmbus/Kconfig



+10
−0






























Original line number
Diff line number
Diff line







@@ -66,6 +66,16 @@ config SENSORS_BPA_RS600







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









	  be called bpa-rs600.



















config SENSORS_DELTA_AHE50DC_FAN









	tristate "Delta AHE-50DC fan control module"









	help









	  If you say yes here you get hardware monitoring support for









	  the integrated fan control module of the Delta AHE-50DC









	  Open19 power shelf.



















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









	  will be called delta-ahe50dc-fan.



















config SENSORS_FSP_3Y









	tristate "FSP/3Y-Power power supplies"









	help
































drivers/hwmon/pmbus/Makefile



+1
−0






























Original line number
Diff line number
Diff line







@@ -9,6 +9,7 @@ obj-$(CONFIG_SENSORS_ADM1266)	+= adm1266.o







obj-$(CONFIG_SENSORS_ADM1275)	+= adm1275.o









obj-$(CONFIG_SENSORS_BEL_PFE)	+= bel-pfe.o









obj-$(CONFIG_SENSORS_BPA_RS600)	+= bpa-rs600.o









obj-$(CONFIG_SENSORS_DELTA_AHE50DC_FAN) += delta-ahe50dc-fan.o









obj-$(CONFIG_SENSORS_FSP_3Y)	+= fsp-3y.o









obj-$(CONFIG_SENSORS_IBM_CFFPS)	+= ibm-cffps.o









obj-$(CONFIG_SENSORS_DPS920AB)	+= dps920ab.o
































drivers/hwmon/pmbus/delta-ahe50dc-fan.c
0 → 100644



+114
−0






























Original line number
Diff line number
Diff line









// SPDX-License-Identifier: GPL-2.0









/*









 * Delta AHE-50DC power shelf fan control module driver









 *









 * Copyright 2021 Zev Weiss <zev@bewilderbeest.net>









 */



















#include <linux/i2c.h>









#include <linux/kernel.h>









#include <linux/module.h>









#include <linux/pmbus.h>



















#include "pmbus.h"



















#define AHE50DC_PMBUS_READ_TEMP4 0xd0



















static int ahe50dc_fan_read_word_data(struct i2c_client *client, int page, int phase, int reg)









{









	/* temp1 in (virtual) page 1 is remapped to mfr-specific temp4 */









	if (page == 1) {









		if (reg == PMBUS_READ_TEMPERATURE_1)









			return i2c_smbus_read_word_data(client, AHE50DC_PMBUS_READ_TEMP4);









		return -EOPNOTSUPP;









	}



















	/*









	 * There's a fairly limited set of commands this device actually









	 * supports, so here we block attempts to read anything else (which









	 * return 0xffff and would cause confusion elsewhere).









	 */









	switch (reg) {









	case PMBUS_STATUS_WORD:









	case PMBUS_FAN_COMMAND_1:









	case PMBUS_FAN_COMMAND_2:









	case PMBUS_FAN_COMMAND_3:









	case PMBUS_FAN_COMMAND_4:









	case PMBUS_STATUS_FAN_12:









	case PMBUS_STATUS_FAN_34:









	case PMBUS_READ_VIN:









	case PMBUS_READ_TEMPERATURE_1:









	case PMBUS_READ_TEMPERATURE_2:









	case PMBUS_READ_TEMPERATURE_3:









	case PMBUS_READ_FAN_SPEED_1:









	case PMBUS_READ_FAN_SPEED_2:









	case PMBUS_READ_FAN_SPEED_3:









	case PMBUS_READ_FAN_SPEED_4:









		return -ENODATA;









	default:









		return -EOPNOTSUPP;









	}









}



















static struct pmbus_driver_info ahe50dc_fan_info = {









	.pages = 2,









	.format[PSC_FAN] = direct,









	.format[PSC_TEMPERATURE] = direct,









	.format[PSC_VOLTAGE_IN] = direct,









	.m[PSC_FAN] = 1,









	.b[PSC_FAN] = 0,









	.R[PSC_FAN] = 0,









	.m[PSC_TEMPERATURE] = 1,









	.b[PSC_TEMPERATURE] = 0,









	.R[PSC_TEMPERATURE] = 1,









	.m[PSC_VOLTAGE_IN] = 1,









	.b[PSC_VOLTAGE_IN] = 0,









	.R[PSC_VOLTAGE_IN] = 3,









	.func[0] = PMBUS_HAVE_TEMP | PMBUS_HAVE_TEMP2 | PMBUS_HAVE_TEMP3 |









		PMBUS_HAVE_VIN | PMBUS_HAVE_FAN12 | PMBUS_HAVE_FAN34 |









		PMBUS_HAVE_STATUS_FAN12 | PMBUS_HAVE_STATUS_FAN34 | PMBUS_PAGE_VIRTUAL,









	.func[1] = PMBUS_HAVE_TEMP | PMBUS_PAGE_VIRTUAL,









	.read_word_data = ahe50dc_fan_read_word_data,









};



















/*









 * CAPABILITY returns 0xff, which appears to be this device's way indicating









 * it doesn't support something (and if we enable I2C_CLIENT_PEC on seeing bit









 * 7 being set it generates bad PECs, so let's not go there).









 */









static struct pmbus_platform_data ahe50dc_fan_data = {









	.flags = PMBUS_NO_CAPABILITY,









};



















static int ahe50dc_fan_probe(struct i2c_client *client)









{









	client->dev.platform_data = &ahe50dc_fan_data;









	return pmbus_do_probe(client, &ahe50dc_fan_info);









}



















static const struct i2c_device_id ahe50dc_fan_id[] = {









	{ "ahe50dc_fan" },









	{ }









};









MODULE_DEVICE_TABLE(i2c, ahe50dc_fan_id);



















static const struct of_device_id __maybe_unused ahe50dc_fan_of_match[] = {









	{ .compatible = "delta,ahe50dc-fan" },









	{ }









};









MODULE_DEVICE_TABLE(of, ahe50dc_fan_of_match);



















static struct i2c_driver ahe50dc_fan_driver = {









	.driver = {









		   .name = "ahe50dc_fan",









		   .of_match_table = of_match_ptr(ahe50dc_fan_of_match),









	},









	.probe_new = ahe50dc_fan_probe,









	.id_table = ahe50dc_fan_id,









};









module_i2c_driver(ahe50dc_fan_driver);



















MODULE_AUTHOR("Zev Weiss <zev@bewilderbeest.net>");









MODULE_DESCRIPTION("Driver for Delta AHE-50DC power shelf fan control module");









MODULE_LICENSE("GPL");









MODULE_IMPORT_NS(PMBUS);