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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-11-30 01:56:42 +07:00
3dda4e373c
Using the class device pointer returned by tty_register_device() with part 1 of the patch, attach the Gigaset drivers' "cidmode" sysfs entry to its tty class device, where it can be found more easily by users who do not know nor care which USB port the device is attached to. Signed-off-by: Hansjoerg Lipp <hjlipp@web.de> Signed-off-by: Tilman Schmidt <tilman@imap.cc> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
88 lines
2.2 KiB
C
88 lines
2.2 KiB
C
/*
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* Stuff used by all variants of the driver
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*
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* Copyright (c) 2001 by Stefan Eilers,
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* Hansjoerg Lipp <hjlipp@web.de>,
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* Tilman Schmidt <tilman@imap.cc>.
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*
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* =====================================================================
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of
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* the License, or (at your option) any later version.
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* =====================================================================
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*/
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#include "gigaset.h"
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#include <linux/ctype.h>
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static ssize_t show_cidmode(struct class_device *class, char *buf)
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{
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int ret;
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unsigned long flags;
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struct cardstate *cs = class_get_devdata(class);
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spin_lock_irqsave(&cs->lock, flags);
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ret = sprintf(buf, "%u\n", cs->cidmode);
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spin_unlock_irqrestore(&cs->lock, flags);
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return ret;
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}
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static ssize_t set_cidmode(struct class_device *class,
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const char *buf, size_t count)
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{
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struct cardstate *cs = class_get_devdata(class);
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long int value;
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char *end;
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value = simple_strtol(buf, &end, 0);
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while (*end)
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if (!isspace(*end++))
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return -EINVAL;
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if (value < 0 || value > 1)
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return -EINVAL;
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if (mutex_lock_interruptible(&cs->mutex))
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return -ERESTARTSYS; // FIXME -EINTR?
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cs->waiting = 1;
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if (!gigaset_add_event(cs, &cs->at_state, EV_PROC_CIDMODE,
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NULL, value, NULL)) {
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cs->waiting = 0;
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mutex_unlock(&cs->mutex);
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return -ENOMEM;
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}
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gig_dbg(DEBUG_CMD, "scheduling PROC_CIDMODE");
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gigaset_schedule_event(cs);
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wait_event(cs->waitqueue, !cs->waiting);
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mutex_unlock(&cs->mutex);
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return count;
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}
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static CLASS_DEVICE_ATTR(cidmode, S_IRUGO|S_IWUSR, show_cidmode, set_cidmode);
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/* free sysfs for device */
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void gigaset_free_dev_sysfs(struct cardstate *cs)
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{
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if (!cs->class)
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return;
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gig_dbg(DEBUG_INIT, "removing sysfs entries");
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class_device_remove_file(cs->class, &class_device_attr_cidmode);
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}
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/* initialize sysfs for device */
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void gigaset_init_dev_sysfs(struct cardstate *cs)
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{
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if (!cs->class)
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return;
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gig_dbg(DEBUG_INIT, "setting up sysfs");
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class_device_create_file(cs->class, &class_device_attr_cidmode);
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}
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