diff options
author | Len Brown <len.brown@intel.com> | 2010-08-15 01:06:31 -0400 |
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committer | Len Brown <len.brown@intel.com> | 2010-08-15 01:06:31 -0400 |
commit | 95ee46aa8698f2000647dfb362400fadbb5807cf (patch) | |
tree | e5a05c7297f997e191c73091934e42e3195c0e40 /arch/mips/jz4740/clock-debugfs.c | |
parent | cfa806f059801dbe7e435745eb2e187c8bfe1e7f (diff) | |
parent | 92fa5bd9a946b6e7aab6764e7312e4e3d9bed295 (diff) |
Merge branch 'linus' into release
Conflicts:
drivers/acpi/debug.c
Signed-off-by: Len Brown <len.brown@intel.com>
Diffstat (limited to 'arch/mips/jz4740/clock-debugfs.c')
-rw-r--r-- | arch/mips/jz4740/clock-debugfs.c | 109 |
1 files changed, 109 insertions, 0 deletions
diff --git a/arch/mips/jz4740/clock-debugfs.c b/arch/mips/jz4740/clock-debugfs.c new file mode 100644 index 00000000000..330a0f2bf17 --- /dev/null +++ b/arch/mips/jz4740/clock-debugfs.c @@ -0,0 +1,109 @@ +/* + * 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) +{ + 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; +} |