mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-29 23:53:55 +08:00
c6b7b9f290
Fix checkpatch warning: WARNING: debugfs_remove(NULL) is safe this check is probably not required Signed-off-by: Fabian Frederick <fabf@skynet.be> Acked-by: Lars-Peter Clausen <lars@metafoo.de> Cc: Ralf Baechle <ralf@linux-mips.org> Cc: linux-mips@linux-mips.org Cc: linux-kernel@vger.kernel.org Patchwork: https://patchwork.linux-mips.org/patch/7225/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
109 lines
2.6 KiB
C
109 lines
2.6 KiB
C
/*
|
|
* Copyright (C) 2010, Lars-Peter Clausen <lars@metafoo.de>
|
|
* JZ4740 SoC clock support debugfs entries
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify it
|
|
* under the terms of the GNU General Public License as published by the
|
|
* Free Software Foundation; either version 2 of the License, or (at your
|
|
* option) any later version.
|
|
*
|
|
* You should have received a copy of the GNU General Public License along
|
|
* with this program; if not, write to the Free Software Foundation, Inc.,
|
|
* 675 Mass Ave, Cambridge, MA 02139, USA.
|
|
*
|
|
*/
|
|
|
|
#include <linux/kernel.h>
|
|
#include <linux/module.h>
|
|
#include <linux/clk.h>
|
|
#include <linux/err.h>
|
|
|
|
#include <linux/debugfs.h>
|
|
#include <linux/uaccess.h>
|
|
|
|
#include <asm/mach-jz4740/clock.h>
|
|
#include "clock.h"
|
|
|
|
static struct dentry *jz4740_clock_debugfs;
|
|
|
|
static int jz4740_clock_debugfs_show_enabled(void *data, uint64_t *value)
|
|
{
|
|
struct clk *clk = data;
|
|
*value = clk_is_enabled(clk);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int jz4740_clock_debugfs_set_enabled(void *data, uint64_t value)
|
|
{
|
|
struct clk *clk = data;
|
|
|
|
if (value)
|
|
return clk_enable(clk);
|
|
else
|
|
clk_disable(clk);
|
|
|
|
return 0;
|
|
}
|
|
|
|
DEFINE_SIMPLE_ATTRIBUTE(jz4740_clock_debugfs_ops_enabled,
|
|
jz4740_clock_debugfs_show_enabled,
|
|
jz4740_clock_debugfs_set_enabled,
|
|
"%llu\n");
|
|
|
|
static int jz4740_clock_debugfs_show_rate(void *data, uint64_t *value)
|
|
{
|
|
struct clk *clk = data;
|
|
*value = clk_get_rate(clk);
|
|
|
|
return 0;
|
|
}
|
|
|
|
DEFINE_SIMPLE_ATTRIBUTE(jz4740_clock_debugfs_ops_rate,
|
|
jz4740_clock_debugfs_show_rate,
|
|
NULL,
|
|
"%llu\n");
|
|
|
|
void jz4740_clock_debugfs_add_clk(struct clk *clk)
|
|
{
|
|
if (!jz4740_clock_debugfs)
|
|
return;
|
|
|
|
clk->debugfs_entry = debugfs_create_dir(clk->name, jz4740_clock_debugfs);
|
|
debugfs_create_file("rate", S_IWUGO | S_IRUGO, clk->debugfs_entry, clk,
|
|
&jz4740_clock_debugfs_ops_rate);
|
|
debugfs_create_file("enabled", S_IRUGO, clk->debugfs_entry, clk,
|
|
&jz4740_clock_debugfs_ops_enabled);
|
|
|
|
if (clk->parent) {
|
|
char parent_path[100];
|
|
snprintf(parent_path, 100, "../%s", clk->parent->name);
|
|
clk->debugfs_parent_entry = debugfs_create_symlink("parent",
|
|
clk->debugfs_entry,
|
|
parent_path);
|
|
}
|
|
}
|
|
|
|
/* TODO: Locking */
|
|
void jz4740_clock_debugfs_update_parent(struct clk *clk)
|
|
{
|
|
debugfs_remove(clk->debugfs_parent_entry);
|
|
|
|
if (clk->parent) {
|
|
char parent_path[100];
|
|
snprintf(parent_path, 100, "../%s", clk->parent->name);
|
|
clk->debugfs_parent_entry = debugfs_create_symlink("parent",
|
|
clk->debugfs_entry,
|
|
parent_path);
|
|
} else {
|
|
clk->debugfs_parent_entry = NULL;
|
|
}
|
|
}
|
|
|
|
void jz4740_clock_debugfs_init(void)
|
|
{
|
|
jz4740_clock_debugfs = debugfs_create_dir("jz4740-clock", NULL);
|
|
if (IS_ERR(jz4740_clock_debugfs))
|
|
jz4740_clock_debugfs = NULL;
|
|
}
|