diff options
Diffstat (limited to 'drivers/hwmon/smsc47b397.c')
| -rw-r--r-- | drivers/hwmon/smsc47b397.c | 56 |
1 files changed, 26 insertions, 30 deletions
diff --git a/drivers/hwmon/smsc47b397.c b/drivers/hwmon/smsc47b397.c index 6bd200756560..c26d6eae0e4e 100644 --- a/drivers/hwmon/smsc47b397.c +++ b/drivers/hwmon/smsc47b397.c @@ -1,3 +1,4 @@ +// SPDX-License-Identifier: GPL-2.0-or-later /* * smsc47b397.c - Part of lm_sensors, Linux kernel modules * for hardware monitoring @@ -10,20 +11,6 @@ * derived in part from smsc47m1.c: * Copyright (C) 2002 Mark D. Studebaker <mdsxyz123@yahoo.com> * Copyright (C) 2004 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. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */ #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt @@ -72,14 +59,19 @@ static inline void superio_select(int ld) superio_outb(0x07, ld); } -static inline void superio_enter(void) +static inline int superio_enter(void) { + if (!request_muxed_region(REG, 2, DRVNAME)) + return -EBUSY; + outb(0x55, REG); + return 0; } static inline void superio_exit(void) { outb(0xAA, REG); + release_region(REG, 2); } #define SUPERIO_REG_DEVID 0x20 @@ -104,7 +96,7 @@ struct smsc47b397_data { struct mutex update_lock; unsigned long last_updated; /* in jiffies */ - int valid; + bool valid; /* register values */ u16 fan[4]; @@ -145,7 +137,7 @@ static struct smsc47b397_data *smsc47b397_update_device(struct device *dev) } data->last_updated = jiffies; - data->valid = 1; + data->valid = true; dev_dbg(dev, "... device update complete\n"); } @@ -164,18 +156,18 @@ static int temp_from_reg(u8 reg) return (s8)reg * 1000; } -static ssize_t show_temp(struct device *dev, struct device_attribute - *devattr, char *buf) +static ssize_t temp_show(struct device *dev, struct device_attribute *devattr, + char *buf) { struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); struct smsc47b397_data *data = smsc47b397_update_device(dev); return sprintf(buf, "%d\n", temp_from_reg(data->temp[attr->index])); } -static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO, show_temp, NULL, 0); -static SENSOR_DEVICE_ATTR(temp2_input, S_IRUGO, show_temp, NULL, 1); -static SENSOR_DEVICE_ATTR(temp3_input, S_IRUGO, show_temp, NULL, 2); -static SENSOR_DEVICE_ATTR(temp4_input, S_IRUGO, show_temp, NULL, 3); +static SENSOR_DEVICE_ATTR_RO(temp1_input, temp, 0); +static SENSOR_DEVICE_ATTR_RO(temp2_input, temp, 1); +static SENSOR_DEVICE_ATTR_RO(temp3_input, temp, 2); +static SENSOR_DEVICE_ATTR_RO(temp4_input, temp, 3); /* * FAN: 1 RPM/bit @@ -188,17 +180,17 @@ static int fan_from_reg(u16 reg) return 90000 * 60 / reg; } -static ssize_t show_fan(struct device *dev, struct device_attribute - *devattr, char *buf) +static ssize_t fan_show(struct device *dev, struct device_attribute *devattr, + char *buf) { struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); struct smsc47b397_data *data = smsc47b397_update_device(dev); return sprintf(buf, "%d\n", fan_from_reg(data->fan[attr->index])); } -static SENSOR_DEVICE_ATTR(fan1_input, S_IRUGO, show_fan, NULL, 0); -static SENSOR_DEVICE_ATTR(fan2_input, S_IRUGO, show_fan, NULL, 1); -static SENSOR_DEVICE_ATTR(fan3_input, S_IRUGO, show_fan, NULL, 2); -static SENSOR_DEVICE_ATTR(fan4_input, S_IRUGO, show_fan, NULL, 3); +static SENSOR_DEVICE_ATTR_RO(fan1_input, fan, 0); +static SENSOR_DEVICE_ATTR_RO(fan2_input, fan, 1); +static SENSOR_DEVICE_ATTR_RO(fan3_input, fan, 2); +static SENSOR_DEVICE_ATTR_RO(fan4_input, fan, 3); static struct attribute *smsc47b397_attrs[] = { &sensor_dev_attr_temp1_input.dev_attr.attr, @@ -300,8 +292,12 @@ static int __init smsc47b397_find(void) u8 id, rev; char *name; unsigned short addr; + int err; + + err = superio_enter(); + if (err) + return err; - superio_enter(); id = force_id ? force_id : superio_inb(SUPERIO_REG_DEVID); switch (id) { |