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arch/mips/jz4740/clock-debugfs.c
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570a0bb82 MIPS: JZ4740: Add... |
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/* * 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 "); 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 "); 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) { if (clk->debugfs_parent_entry) 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; } |