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

Merge branch 'hwmon-for-linus' of git://

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://
  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
......@@ -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
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.
tristate "Intel Core/Core2/Atom temperature sensor"
depends on X86
......@@ -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
* i5500_temp - Driver for Intel 5500/5520/X58 chipset thermal sensor
* Copyright (C) 2012, 2014 Jean Delvare <>
* 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
* 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_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[] = {
static const struct pci_device_id i5500_temp_ids[] = {
{ 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,
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_AUTHOR("Jean Delvare <>");
MODULE_DESCRIPTION("Intel 5500/5520/X58 chipset thermal sensor driver");
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