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