63 lines
1.1 KiB
C
63 lines
1.1 KiB
C
// SPDX-License-Identifier: GPL-2.0
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#include <linux/proc_fs.h>
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#include "fb_internal.h"
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static struct proc_dir_entry *fb_proc_dir_entry;
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static void *fb_seq_start(struct seq_file *m, loff_t *pos)
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{
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mutex_lock(®istration_lock);
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return (*pos < FB_MAX) ? pos : NULL;
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}
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static void fb_seq_stop(struct seq_file *m, void *v)
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{
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mutex_unlock(®istration_lock);
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}
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static void *fb_seq_next(struct seq_file *m, void *v, loff_t *pos)
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{
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(*pos)++;
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return (*pos < FB_MAX) ? pos : NULL;
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}
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static int fb_seq_show(struct seq_file *m, void *v)
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{
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int i = *(loff_t *)v;
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struct fb_info *fi = registered_fb[i];
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if (fi)
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seq_printf(m, "%d %s\n", fi->node, fi->fix.id);
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return 0;
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}
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static const struct seq_operations __maybe_unused fb_proc_seq_ops = {
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.start = fb_seq_start,
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.stop = fb_seq_stop,
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.next = fb_seq_next,
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.show = fb_seq_show,
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};
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int fb_init_procfs(void)
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{
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struct proc_dir_entry *proc;
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proc = proc_create_seq("fb", 0, NULL, &fb_proc_seq_ops);
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if (!proc)
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return -ENOMEM;
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fb_proc_dir_entry = proc;
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return 0;
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}
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void fb_cleanup_procfs(void)
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{
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proc_remove(fb_proc_dir_entry);
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}
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