Commit 0012125a authored by Linus Torvalds's avatar Linus Torvalds
Browse files

Merge branch 'hwmon-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jdelvare/staging 

Pull hwmon update from Jean Delvare:
 "This contains a single thing: a new driver for the temperature sensor
  embedded in the Intel 5500/5520/X58 chipsets.

  Sorry for the late request, it's been so long since I last sent a pull
  request and I've been so busy with other tasks meanwhile that I simply
  forgot about these patches.  But given that this is a new driver, it
  can't introduce any regression so I thought it could still be OK.

  This has been in linux-next for months now"

* 'hwmon-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jdelvare/staging:
  hwmon: (i5500_temp) Convert to use ATTRIBUTE_GROUPS macro
  hwmon: (i5500_temp) Convert to module_pci_driver
  hwmon: (i5500_temp) Don't bind to disabled sensors
  hwmon: (i5500_temp) Convert to devm_hwmon_device_register_with_groups
  hwmon: (i5500_temp) New driver for the Intel 5500/5520/X58 chipsets
parents af469b37 86c725e3

drivers/hwmon/Kconfig

+10 −0
Original line number Diff line number Diff line
@@ -574,6 +574,16 @@ config SENSORS_IIO_HWMON 
	  for those channels specified in the map.  This map can be provided

	  either via platform data or the device tree bindings.



config SENSORS_I5500

	tristate "Intel 5500/5520/X58 temperature sensor"

	depends on X86 && PCI

	help

	  If you say yes here you get support for the temperature

	  sensor inside the Intel 5500, 5520 and X58 chipsets.



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

	  will be called i5500_temp.



config SENSORS_CORETEMP

	tristate "Intel Core/Core2/Atom temperature sensor"

	depends on X86

drivers/hwmon/Makefile

+1 −0
Original line number Diff line number Diff line
@@ -68,6 +68,7 @@ obj-$(CONFIG_SENSORS_GPIO_FAN) += gpio-fan.o 
obj-$(CONFIG_SENSORS_HIH6130)	+= hih6130.o

obj-$(CONFIG_SENSORS_HTU21)	+= htu21.o

obj-$(CONFIG_SENSORS_ULTRA45)	+= ultra45_env.o

obj-$(CONFIG_SENSORS_I5500)	+= i5500_temp.o

obj-$(CONFIG_SENSORS_I5K_AMB)	+= i5k_amb.o

obj-$(CONFIG_SENSORS_IBMAEM)	+= ibmaem.o

obj-$(CONFIG_SENSORS_IBMPEX)	+= ibmpex.o

drivers/hwmon/i5500_temp.c

0 → 100644
+149 −0
Original line number Diff line number Diff line 
/*

 * i5500_temp - Driver for Intel 5500/5520/X58 chipset thermal sensor

 *

 * Copyright (C) 2012, 2014 Jean Delvare <jdelvare@suse.de>

 *

 * 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

 * the Free Software Foundation; either version 2 of the License, or

 * (at your option) any later version.

 *

 * This program is distributed in the hope that it will be useful,

 * but WITHOUT ANY WARRANTY; without even the implied warranty of

 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

 * GNU General Public License for more details.

 */



#include <linux/module.h>

#include <linux/init.h>

#include <linux/slab.h>

#include <linux/jiffies.h>

#include <linux/device.h>

#include <linux/pci.h>

#include <linux/hwmon.h>

#include <linux/hwmon-sysfs.h>

#include <linux/err.h>

#include <linux/mutex.h>



/* Register definitions from datasheet */

#define REG_TSTHRCATA	0xE2

#define REG_TSCTRL	0xE8

#define REG_TSTHRRPEX	0xEB

#define REG_TSTHRLO	0xEC

#define REG_TSTHRHI	0xEE

#define REG_CTHINT	0xF0

#define REG_TSFSC	0xF3

#define REG_CTSTS	0xF4

#define REG_TSTHRRQPI	0xF5

#define REG_CTCTRL	0xF7

#define REG_TSTIMER	0xF8



/*

 * Sysfs stuff

 */



/* Sensor resolution : 0.5 degree C */

static ssize_t show_temp(struct device *dev,

			 struct device_attribute *devattr, char *buf)

{

	struct pci_dev *pdev = to_pci_dev(dev->parent);

	long temp;

	u16 tsthrhi;

	s8 tsfsc;



	pci_read_config_word(pdev, REG_TSTHRHI, &tsthrhi);

	pci_read_config_byte(pdev, REG_TSFSC, &tsfsc);

	temp = ((long)tsthrhi - tsfsc) * 500;



	return sprintf(buf, "%ld\n", temp);

}



static ssize_t show_thresh(struct device *dev,

			   struct device_attribute *devattr, char *buf)

{

	struct pci_dev *pdev = to_pci_dev(dev->parent);

	int reg = to_sensor_dev_attr(devattr)->index;

	long temp;

	u16 tsthr;



	pci_read_config_word(pdev, reg, &tsthr);

	temp = tsthr * 500;



	return sprintf(buf, "%ld\n", temp);

}



static ssize_t show_alarm(struct device *dev,

			  struct device_attribute *devattr, char *buf)

{

	struct pci_dev *pdev = to_pci_dev(dev->parent);

	int nr = to_sensor_dev_attr(devattr)->index;

	u8 ctsts;



	pci_read_config_byte(pdev, REG_CTSTS, &ctsts);

	return sprintf(buf, "%u\n", (unsigned int)ctsts & (1 << nr));

}



static DEVICE_ATTR(temp1_input, S_IRUGO, show_temp, NULL);

static SENSOR_DEVICE_ATTR(temp1_crit, S_IRUGO, show_thresh, NULL, 0xE2);

static SENSOR_DEVICE_ATTR(temp1_max_hyst, S_IRUGO, show_thresh, NULL, 0xEC);

static SENSOR_DEVICE_ATTR(temp1_max, S_IRUGO, show_thresh, NULL, 0xEE);

static SENSOR_DEVICE_ATTR(temp1_crit_alarm, S_IRUGO, show_alarm, NULL, 0);

static SENSOR_DEVICE_ATTR(temp1_max_alarm, S_IRUGO, show_alarm, NULL, 1);



static struct attribute *i5500_temp_attrs[] = {

	&dev_attr_temp1_input.attr,

	&sensor_dev_attr_temp1_crit.dev_attr.attr,

	&sensor_dev_attr_temp1_max_hyst.dev_attr.attr,

	&sensor_dev_attr_temp1_max.dev_attr.attr,

	&sensor_dev_attr_temp1_crit_alarm.dev_attr.attr,

	&sensor_dev_attr_temp1_max_alarm.dev_attr.attr,

	NULL

};



ATTRIBUTE_GROUPS(i5500_temp);



static const struct pci_device_id i5500_temp_ids[] = {

	{ PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x3438) },

	{ 0 },

};



MODULE_DEVICE_TABLE(pci, i5500_temp_ids);



static int i5500_temp_probe(struct pci_dev *pdev,

			    const struct pci_device_id *id)

{

	int err;

	struct device *hwmon_dev;

	u32 tstimer;

	s8 tsfsc;



	err = pci_enable_device(pdev);

	if (err) {

		dev_err(&pdev->dev, "Failed to enable device\n");

		return err;

	}



	pci_read_config_byte(pdev, REG_TSFSC, &tsfsc);

	pci_read_config_dword(pdev, REG_TSTIMER, &tstimer);

	if (tsfsc == 0x7F && tstimer == 0x07D30D40) {

		dev_notice(&pdev->dev, "Sensor seems to be disabled\n");

		return -ENODEV;

	}



	hwmon_dev = devm_hwmon_device_register_with_groups(&pdev->dev,

							   "intel5500", NULL,

							   i5500_temp_groups);

	return PTR_ERR_OR_ZERO(hwmon_dev);

}



static struct pci_driver i5500_temp_driver = {

	.name = "i5500_temp",

	.id_table = i5500_temp_ids,

	.probe = i5500_temp_probe,

};



module_pci_driver(i5500_temp_driver);



MODULE_AUTHOR("Jean Delvare <jdelvare@suse.de>");

MODULE_DESCRIPTION("Intel 5500/5520/X58 chipset thermal sensor driver");

MODULE_LICENSE("GPL");

CRA Git | Maintained and supported by SUSTech CRA and CCSE