Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / drivers / hwmon / i5500_temp.c

diff --git a/kernel/drivers/hwmon/i5500_temp.c b/kernel/drivers/hwmon/i5500_temp.c
new file mode 100644 (file)
index 0000000..3e3ccbf
--- /dev/null
+++ b/kernel/drivers/hwmon/i5500_temp.c
@@ -0,0 +1,149 @@
+/*
+ * 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");