diff options
Diffstat (limited to 'drivers/hwmon/pc87427.c')
| -rw-r--r-- | drivers/hwmon/pc87427.c | 24 |
1 files changed, 14 insertions, 10 deletions
diff --git a/drivers/hwmon/pc87427.c b/drivers/hwmon/pc87427.c index d1a3f2040c00..eaab83d879fb 100644 --- a/drivers/hwmon/pc87427.c +++ b/drivers/hwmon/pc87427.c @@ -1,17 +1,9 @@ +// SPDX-License-Identifier: GPL-2.0-only /* * pc87427.c - hardware monitoring driver for the * National Semiconductor PC87427 Super-I/O chip * Copyright (C) 2006, 2008, 2010 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 version 2 as - * published by the Free Software Foundation. - * - * 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. - * * Supports the following chips: * * Chip #vin #fan #pwm #temp devid @@ -106,6 +98,13 @@ static const char *logdev_str[2] = { DRVNAME " FMC", DRVNAME " HMC" }; #define LD_IN 1 #define LD_TEMP 1 +static inline int superio_enter(int sioaddr) +{ + if (!request_muxed_region(sioaddr, 2, DRVNAME)) + return -EBUSY; + return 0; +} + static inline void superio_outb(int sioaddr, int reg, int val) { outb(reg, sioaddr); @@ -122,6 +121,7 @@ static inline void superio_exit(int sioaddr) { outb(0x02, sioaddr); outb(0x02, sioaddr + 1); + release_region(sioaddr, 2); } /* @@ -1195,7 +1195,11 @@ static int __init pc87427_find(int sioaddr, struct pc87427_sio_data *sio_data) { u16 val; u8 cfg, cfg_b; - int i, err = 0; + int i, err; + + err = superio_enter(sioaddr); + if (err) + return err; /* Identify device */ val = force_id ? force_id : superio_inb(sioaddr, SIOREG_DEVID); |