mirror of https://gitee.com/openkylin/linux.git
131 lines
3.0 KiB
C
131 lines
3.0 KiB
C
/*
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* Copyright (C) 2007 Google, Inc.
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* Copyright (c) 2007-2010, Code Aurora Forum. All rights reserved.
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*
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* This software is licensed under the terms of the GNU General Public
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* License version 2, as published by the Free Software Foundation, and
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* may be copied, distributed, and modified under those terms.
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*
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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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*
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*/
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/ctype.h>
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#include <linux/debugfs.h>
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#include <linux/clk.h>
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#include "clock.h"
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static int clock_debug_rate_set(void *data, u64 val)
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{
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struct clk *clock = data;
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int ret;
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/* Only increases to max rate will succeed, but that's actually good
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* for debugging purposes so we don't check for error. */
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if (clock->flags & CLK_MAX)
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clk_set_max_rate(clock, val);
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if (clock->flags & CLK_MIN)
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ret = clk_set_min_rate(clock, val);
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else
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ret = clk_set_rate(clock, val);
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if (ret != 0)
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printk(KERN_ERR "clk_set%s_rate failed (%d)\n",
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(clock->flags & CLK_MIN) ? "_min" : "", ret);
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return ret;
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}
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static int clock_debug_rate_get(void *data, u64 *val)
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{
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struct clk *clock = data;
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*val = clk_get_rate(clock);
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return 0;
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}
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DEFINE_SIMPLE_ATTRIBUTE(clock_rate_fops, clock_debug_rate_get,
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clock_debug_rate_set, "%llu\n");
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static int clock_debug_enable_set(void *data, u64 val)
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{
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struct clk *clock = data;
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int rc = 0;
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if (val)
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rc = clock->ops->enable(clock->id);
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else
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clock->ops->disable(clock->id);
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return rc;
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}
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static int clock_debug_enable_get(void *data, u64 *val)
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{
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struct clk *clock = data;
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*val = clock->ops->is_enabled(clock->id);
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return 0;
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}
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DEFINE_SIMPLE_ATTRIBUTE(clock_enable_fops, clock_debug_enable_get,
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clock_debug_enable_set, "%llu\n");
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static int clock_debug_local_get(void *data, u64 *val)
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{
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struct clk *clock = data;
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*val = clock->ops->is_local(clock->id);
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return 0;
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}
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DEFINE_SIMPLE_ATTRIBUTE(clock_local_fops, clock_debug_local_get,
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NULL, "%llu\n");
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static struct dentry *debugfs_base;
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int __init clock_debug_init(void)
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{
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debugfs_base = debugfs_create_dir("clk", NULL);
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if (!debugfs_base)
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return -ENOMEM;
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return 0;
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}
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int __init clock_debug_add(struct clk *clock)
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{
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char temp[50], *ptr;
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struct dentry *clk_dir;
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if (!debugfs_base)
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return -ENOMEM;
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strncpy(temp, clock->dbg_name, ARRAY_SIZE(temp)-1);
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for (ptr = temp; *ptr; ptr++)
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*ptr = tolower(*ptr);
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clk_dir = debugfs_create_dir(temp, debugfs_base);
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if (!clk_dir)
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return -ENOMEM;
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if (!debugfs_create_file("rate", S_IRUGO | S_IWUSR, clk_dir,
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clock, &clock_rate_fops))
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goto error;
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if (!debugfs_create_file("enable", S_IRUGO | S_IWUSR, clk_dir,
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clock, &clock_enable_fops))
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goto error;
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if (!debugfs_create_file("is_local", S_IRUGO, clk_dir, clock,
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&clock_local_fops))
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goto error;
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return 0;
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error:
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debugfs_remove_recursive(clk_dir);
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return -ENOMEM;
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}
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