+// 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
#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);
{
outb(0x02, sioaddr);
outb(0x02, sioaddr + 1);
+ release_region(sioaddr, 2);
}
/*
{
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);