forked from mirrors/linux
2a52220c89
Not all devices use proc_comm and determining if a clock is local vs. remote is fragile when done by comparing clk_ops pointers. Instead, implement an is_local() function for all clk_ops to determine if the clock is local. Doing this allows us to remove the last references to clk_ops_pcom from clock.c and compile it for targets with CONFIG_MSM_PROC_COMM=n. We don't need to set the clk_ops at runtime until 7x30 local clock detection comes in. Right now it's just complicating things so just set the ops pointer statically. Signed-off-by: Stephen Boyd <sboyd@codeaurora.org> Signed-off-by: David Brown <davidb@codeaurora.org>
130 lines
3 KiB
C
130 lines
3 KiB
C
/*
|
|
* 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"
|
|
|
|
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->is_local(clock->id);
|
|
|
|
return 0;
|
|
}
|
|
|
|
DEFINE_SIMPLE_ATTRIBUTE(clock_local_fops, clock_debug_local_get,
|
|
NULL, "%llu\n");
|
|
|
|
static struct dentry *debugfs_base;
|
|
|
|
int __init clock_debug_init(void)
|
|
{
|
|
debugfs_base = debugfs_create_dir("clk", NULL);
|
|
if (!debugfs_base)
|
|
return -ENOMEM;
|
|
return 0;
|
|
}
|
|
|
|
int __init clock_debug_add(struct clk *clock)
|
|
{
|
|
char temp[50], *ptr;
|
|
struct dentry *clk_dir;
|
|
|
|
if (!debugfs_base)
|
|
return -ENOMEM;
|
|
|
|
strncpy(temp, clock->dbg_name, ARRAY_SIZE(temp)-1);
|
|
for (ptr = temp; *ptr; ptr++)
|
|
*ptr = tolower(*ptr);
|
|
|
|
clk_dir = debugfs_create_dir(temp, debugfs_base);
|
|
if (!clk_dir)
|
|
return -ENOMEM;
|
|
|
|
if (!debugfs_create_file("rate", S_IRUGO | S_IWUSR, clk_dir,
|
|
clock, &clock_rate_fops))
|
|
goto error;
|
|
|
|
if (!debugfs_create_file("enable", S_IRUGO | S_IWUSR, clk_dir,
|
|
clock, &clock_enable_fops))
|
|
goto error;
|
|
|
|
if (!debugfs_create_file("is_local", S_IRUGO, clk_dir, clock,
|
|
&clock_local_fops))
|
|
goto error;
|
|
return 0;
|
|
error:
|
|
debugfs_remove_recursive(clk_dir);
|
|
return -ENOMEM;
|
|
}
|