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Mark M. Hoffman
c277761d15
This patch replaces the I2C bus enumeration (through sysfs) in lib/proc.c with a new function in lib/sysfs (using libsysfs). The patch also updates the init code accordingly. git-svn-id: http://lm-sensors.org/svn/lm-sensors/trunk@3094 7894878c-1315-0410-8ee3-d5d059ff63e0
97 lines
2.6 KiB
C
97 lines
2.6 KiB
C
/*
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sysfs.c - Part of libsensors, a library for reading Linux sensor data
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Copyright (c) 2005 Mark M. Hoffman <mhoffman@lightlink.com>
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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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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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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#include <string.h>
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#include <limits.h>
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#include <sysfs/libsysfs.h>
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#include "data.h"
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#include "error.h"
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#include "access.h"
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#include "general.h"
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#include "sysfs.h"
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int sensors_found_sysfs = 0;
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char sensors_sysfs_mount[NAME_MAX];
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/* returns !0 if sysfs filesystem was found, 0 otherwise */
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int sensors_init_sysfs(void)
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{
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if (sysfs_get_mnt_path(sensors_sysfs_mount, NAME_MAX) == 0)
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sensors_found_sysfs = 1;
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return sensors_found_sysfs;
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}
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/* returns 0 if successful, !0 otherwise */
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int sensors_read_sysfs_bus(void)
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{
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struct sysfs_class *cls;
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struct dlist *clsdevs;
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struct sysfs_class_device *clsdev;
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sensors_bus entry;
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int ret = 0;
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if (!(cls = sysfs_open_class("i2c-adapter"))) {
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ret = -SENSORS_ERR_PROC;
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goto exit0;
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}
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if (!(clsdevs = sysfs_get_class_devices(cls))) {
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ret = -SENSORS_ERR_PROC;
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goto exit1;
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}
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dlist_for_each_data(clsdevs, clsdev, struct sysfs_class_device) {
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struct sysfs_device *dev;
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struct sysfs_attribute *attr;
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if (!(dev = sysfs_get_classdev_device(clsdev)))
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continue;
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if (!(attr = sysfs_get_device_attr(dev, "name")))
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continue;
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entry.adapter = strdup(attr->value);
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if (!entry.adapter)
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sensors_fatal_error(__FUNCTION__, "out of memory");
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if (!strncmp(entry.adapter, "ISA ", 4)) {
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entry.number = SENSORS_CHIP_NAME_BUS_ISA;
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entry.algorithm = strdup("ISA bus algorithm");
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} else if (sscanf(clsdev->name, "i2c-%d", &entry.number) != 1) {
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entry.number = SENSORS_CHIP_NAME_BUS_DUMMY;
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entry.algorithm = strdup("Dummy bus algorithm");
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} else
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entry.algorithm = strdup("Unavailable from sysfs");
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if (!entry.algorithm)
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sensors_fatal_error(__FUNCTION__, "out of memory");
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sensors_add_proc_bus(&entry);
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}
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exit1:
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/* this frees *cls _and_ *clsdevs */
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sysfs_close_class(cls);
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exit0:
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return ret;
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}
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