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3eb52cfdf5
Use DEVICE_ATTR_RO for read-only attributes. This simplifies the source code, improves readbility, and reduces the chance of inconsistencies. The conversion was done automatically using coccinelle. It was validated by compiling both the old and the new source code and comparing its text, data, and bss size. Signed-off-by: Julia Lawall <Julia.Lawall@lip6.fr> [groeck: Updated description] Signed-off-by: Guenter Roeck <linux@roeck-us.net>
150 lines
4.1 KiB
C
150 lines
4.1 KiB
C
/*
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* i5500_temp - Driver for Intel 5500/5520/X58 chipset thermal sensor
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*
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* Copyright (C) 2012, 2014 Jean Delvare <jdelvare@suse.de>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*/
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#include <linux/module.h>
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#include <linux/init.h>
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#include <linux/slab.h>
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#include <linux/jiffies.h>
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#include <linux/device.h>
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#include <linux/pci.h>
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#include <linux/hwmon.h>
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#include <linux/hwmon-sysfs.h>
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#include <linux/err.h>
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#include <linux/mutex.h>
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/* Register definitions from datasheet */
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#define REG_TSTHRCATA 0xE2
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#define REG_TSCTRL 0xE8
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#define REG_TSTHRRPEX 0xEB
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#define REG_TSTHRLO 0xEC
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#define REG_TSTHRHI 0xEE
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#define REG_CTHINT 0xF0
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#define REG_TSFSC 0xF3
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#define REG_CTSTS 0xF4
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#define REG_TSTHRRQPI 0xF5
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#define REG_CTCTRL 0xF7
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#define REG_TSTIMER 0xF8
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/*
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* Sysfs stuff
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*/
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/* Sensor resolution : 0.5 degree C */
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static ssize_t temp1_input_show(struct device *dev,
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struct device_attribute *devattr, char *buf)
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{
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struct pci_dev *pdev = to_pci_dev(dev->parent);
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long temp;
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u16 tsthrhi;
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s8 tsfsc;
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pci_read_config_word(pdev, REG_TSTHRHI, &tsthrhi);
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pci_read_config_byte(pdev, REG_TSFSC, &tsfsc);
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temp = ((long)tsthrhi - tsfsc) * 500;
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return sprintf(buf, "%ld\n", temp);
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}
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static ssize_t show_thresh(struct device *dev,
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struct device_attribute *devattr, char *buf)
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{
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struct pci_dev *pdev = to_pci_dev(dev->parent);
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int reg = to_sensor_dev_attr(devattr)->index;
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long temp;
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u16 tsthr;
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pci_read_config_word(pdev, reg, &tsthr);
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temp = tsthr * 500;
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return sprintf(buf, "%ld\n", temp);
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}
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static ssize_t show_alarm(struct device *dev,
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struct device_attribute *devattr, char *buf)
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{
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struct pci_dev *pdev = to_pci_dev(dev->parent);
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int nr = to_sensor_dev_attr(devattr)->index;
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u8 ctsts;
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pci_read_config_byte(pdev, REG_CTSTS, &ctsts);
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return sprintf(buf, "%u\n", (unsigned int)ctsts & (1 << nr));
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}
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static DEVICE_ATTR_RO(temp1_input);
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static SENSOR_DEVICE_ATTR(temp1_crit, S_IRUGO, show_thresh, NULL, 0xE2);
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static SENSOR_DEVICE_ATTR(temp1_max_hyst, S_IRUGO, show_thresh, NULL, 0xEC);
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static SENSOR_DEVICE_ATTR(temp1_max, S_IRUGO, show_thresh, NULL, 0xEE);
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static SENSOR_DEVICE_ATTR(temp1_crit_alarm, S_IRUGO, show_alarm, NULL, 0);
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static SENSOR_DEVICE_ATTR(temp1_max_alarm, S_IRUGO, show_alarm, NULL, 1);
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static struct attribute *i5500_temp_attrs[] = {
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&dev_attr_temp1_input.attr,
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&sensor_dev_attr_temp1_crit.dev_attr.attr,
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&sensor_dev_attr_temp1_max_hyst.dev_attr.attr,
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&sensor_dev_attr_temp1_max.dev_attr.attr,
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&sensor_dev_attr_temp1_crit_alarm.dev_attr.attr,
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&sensor_dev_attr_temp1_max_alarm.dev_attr.attr,
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NULL
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};
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ATTRIBUTE_GROUPS(i5500_temp);
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static const struct pci_device_id i5500_temp_ids[] = {
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{ PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x3438) },
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{ 0 },
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};
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MODULE_DEVICE_TABLE(pci, i5500_temp_ids);
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static int i5500_temp_probe(struct pci_dev *pdev,
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const struct pci_device_id *id)
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{
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int err;
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struct device *hwmon_dev;
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u32 tstimer;
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s8 tsfsc;
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err = pci_enable_device(pdev);
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if (err) {
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dev_err(&pdev->dev, "Failed to enable device\n");
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return err;
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}
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pci_read_config_byte(pdev, REG_TSFSC, &tsfsc);
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pci_read_config_dword(pdev, REG_TSTIMER, &tstimer);
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if (tsfsc == 0x7F && tstimer == 0x07D30D40) {
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dev_notice(&pdev->dev, "Sensor seems to be disabled\n");
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return -ENODEV;
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}
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hwmon_dev = devm_hwmon_device_register_with_groups(&pdev->dev,
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"intel5500", NULL,
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i5500_temp_groups);
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return PTR_ERR_OR_ZERO(hwmon_dev);
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}
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static struct pci_driver i5500_temp_driver = {
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.name = "i5500_temp",
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.id_table = i5500_temp_ids,
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.probe = i5500_temp_probe,
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};
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module_pci_driver(i5500_temp_driver);
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MODULE_AUTHOR("Jean Delvare <jdelvare@suse.de>");
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MODULE_DESCRIPTION("Intel 5500/5520/X58 chipset thermal sensor driver");
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MODULE_LICENSE("GPL");
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