clk: Remove forward declared function prototypes
Move the code around so that we don't need to declare function prototypes at the start of the file. Simplify clk_core_is_prepared() and clk_core_is_enabled() too to make the diff easier to read. Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
This commit is contained in:
Stephen Boyd
Родитель
1f3e198342
Коммит
4dff95dc94
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@ -37,13 +37,6 @@ static HLIST_HEAD(clk_root_list);
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static HLIST_HEAD(clk_orphan_list);
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static LIST_HEAD(clk_notifier_list);
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static long clk_core_get_accuracy(struct clk_core *core);
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static unsigned long clk_core_get_rate(struct clk_core *core);
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static int clk_core_get_phase(struct clk_core *core);
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static bool clk_core_is_prepared(struct clk_core *core);
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static bool clk_core_is_enabled(struct clk_core *core);
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static struct clk_core *clk_core_lookup(const char *name);
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/*** private data structures ***/
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struct clk_core {
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@ -145,339 +138,30 @@ static void clk_enable_unlock(unsigned long flags)
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spin_unlock_irqrestore(&enable_lock, flags);
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}
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/*** debugfs support ***/
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#ifdef CONFIG_DEBUG_FS
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#include <linux/debugfs.h>
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static struct dentry *rootdir;
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static int inited = 0;
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static DEFINE_MUTEX(clk_debug_lock);
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static HLIST_HEAD(clk_debug_list);
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static struct hlist_head *all_lists[] = {
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&clk_root_list,
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&clk_orphan_list,
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NULL,
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};
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static struct hlist_head *orphan_list[] = {
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&clk_orphan_list,
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NULL,
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};
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static void clk_summary_show_one(struct seq_file *s, struct clk_core *c,
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int level)
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static bool clk_core_is_prepared(struct clk_core *core)
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{
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if (!c)
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return;
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/*
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* .is_prepared is optional for clocks that can prepare
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* fall back to software usage counter if it is missing
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*/
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if (!core->ops->is_prepared)
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return core->prepare_count;
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seq_printf(s, "%*s%-*s %11d %12d %11lu %10lu %-3d\n",
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level * 3 + 1, "",
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30 - level * 3, c->name,
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c->enable_count, c->prepare_count, clk_core_get_rate(c),
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clk_core_get_accuracy(c), clk_core_get_phase(c));
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return core->ops->is_prepared(core->hw);
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}
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static void clk_summary_show_subtree(struct seq_file *s, struct clk_core *c,
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int level)
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static bool clk_core_is_enabled(struct clk_core *core)
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{
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struct clk_core *child;
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/*
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* .is_enabled is only mandatory for clocks that gate
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* fall back to software usage counter if .is_enabled is missing
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*/
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if (!core->ops->is_enabled)
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return core->enable_count;
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if (!c)
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return;
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clk_summary_show_one(s, c, level);
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hlist_for_each_entry(child, &c->children, child_node)
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clk_summary_show_subtree(s, child, level + 1);
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return core->ops->is_enabled(core->hw);
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}
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static int clk_summary_show(struct seq_file *s, void *data)
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{
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struct clk_core *c;
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struct hlist_head **lists = (struct hlist_head **)s->private;
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seq_puts(s, " clock enable_cnt prepare_cnt rate accuracy phase\n");
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seq_puts(s, "----------------------------------------------------------------------------------------\n");
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clk_prepare_lock();
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for (; *lists; lists++)
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hlist_for_each_entry(c, *lists, child_node)
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clk_summary_show_subtree(s, c, 0);
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clk_prepare_unlock();
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return 0;
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}
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static int clk_summary_open(struct inode *inode, struct file *file)
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{
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return single_open(file, clk_summary_show, inode->i_private);
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}
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static const struct file_operations clk_summary_fops = {
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.open = clk_summary_open,
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.read = seq_read,
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.llseek = seq_lseek,
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.release = single_release,
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};
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static void clk_dump_one(struct seq_file *s, struct clk_core *c, int level)
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{
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if (!c)
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return;
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seq_printf(s, "\"%s\": { ", c->name);
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seq_printf(s, "\"enable_count\": %d,", c->enable_count);
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seq_printf(s, "\"prepare_count\": %d,", c->prepare_count);
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seq_printf(s, "\"rate\": %lu", clk_core_get_rate(c));
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seq_printf(s, "\"accuracy\": %lu", clk_core_get_accuracy(c));
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seq_printf(s, "\"phase\": %d", clk_core_get_phase(c));
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}
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static void clk_dump_subtree(struct seq_file *s, struct clk_core *c, int level)
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{
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struct clk_core *child;
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if (!c)
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return;
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clk_dump_one(s, c, level);
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hlist_for_each_entry(child, &c->children, child_node) {
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seq_printf(s, ",");
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clk_dump_subtree(s, child, level + 1);
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}
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seq_printf(s, "}");
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}
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static int clk_dump(struct seq_file *s, void *data)
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{
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struct clk_core *c;
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bool first_node = true;
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struct hlist_head **lists = (struct hlist_head **)s->private;
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seq_printf(s, "{");
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clk_prepare_lock();
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for (; *lists; lists++) {
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hlist_for_each_entry(c, *lists, child_node) {
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if (!first_node)
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seq_puts(s, ",");
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first_node = false;
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clk_dump_subtree(s, c, 0);
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}
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}
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clk_prepare_unlock();
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seq_printf(s, "}");
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return 0;
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}
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static int clk_dump_open(struct inode *inode, struct file *file)
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{
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return single_open(file, clk_dump, inode->i_private);
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}
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static const struct file_operations clk_dump_fops = {
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.open = clk_dump_open,
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.read = seq_read,
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.llseek = seq_lseek,
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.release = single_release,
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};
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static int clk_debug_create_one(struct clk_core *core, struct dentry *pdentry)
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{
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struct dentry *d;
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int ret = -ENOMEM;
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if (!core || !pdentry) {
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ret = -EINVAL;
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goto out;
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}
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d = debugfs_create_dir(core->name, pdentry);
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if (!d)
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goto out;
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core->dentry = d;
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d = debugfs_create_u32("clk_rate", S_IRUGO, core->dentry,
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(u32 *)&core->rate);
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if (!d)
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goto err_out;
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d = debugfs_create_u32("clk_accuracy", S_IRUGO, core->dentry,
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(u32 *)&core->accuracy);
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if (!d)
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goto err_out;
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d = debugfs_create_u32("clk_phase", S_IRUGO, core->dentry,
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(u32 *)&core->phase);
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if (!d)
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goto err_out;
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d = debugfs_create_x32("clk_flags", S_IRUGO, core->dentry,
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(u32 *)&core->flags);
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if (!d)
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goto err_out;
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d = debugfs_create_u32("clk_prepare_count", S_IRUGO, core->dentry,
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(u32 *)&core->prepare_count);
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if (!d)
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goto err_out;
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d = debugfs_create_u32("clk_enable_count", S_IRUGO, core->dentry,
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(u32 *)&core->enable_count);
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if (!d)
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goto err_out;
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d = debugfs_create_u32("clk_notifier_count", S_IRUGO, core->dentry,
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(u32 *)&core->notifier_count);
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if (!d)
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goto err_out;
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if (core->ops->debug_init) {
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ret = core->ops->debug_init(core->hw, core->dentry);
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if (ret)
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goto err_out;
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}
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ret = 0;
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goto out;
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err_out:
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debugfs_remove_recursive(core->dentry);
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core->dentry = NULL;
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out:
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return ret;
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}
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/**
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* clk_debug_register - add a clk node to the debugfs clk tree
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* @core: the clk being added to the debugfs clk tree
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*
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* Dynamically adds a clk to the debugfs clk tree if debugfs has been
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* initialized. Otherwise it bails out early since the debugfs clk tree
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* will be created lazily by clk_debug_init as part of a late_initcall.
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*/
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static int clk_debug_register(struct clk_core *core)
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{
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int ret = 0;
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mutex_lock(&clk_debug_lock);
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hlist_add_head(&core->debug_node, &clk_debug_list);
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if (!inited)
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goto unlock;
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ret = clk_debug_create_one(core, rootdir);
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unlock:
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mutex_unlock(&clk_debug_lock);
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return ret;
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}
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/**
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* clk_debug_unregister - remove a clk node from the debugfs clk tree
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* @core: the clk being removed from the debugfs clk tree
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*
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* Dynamically removes a clk and all it's children clk nodes from the
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* debugfs clk tree if clk->dentry points to debugfs created by
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* clk_debug_register in __clk_init.
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*/
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static void clk_debug_unregister(struct clk_core *core)
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{
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mutex_lock(&clk_debug_lock);
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hlist_del_init(&core->debug_node);
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debugfs_remove_recursive(core->dentry);
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core->dentry = NULL;
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mutex_unlock(&clk_debug_lock);
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}
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struct dentry *clk_debugfs_add_file(struct clk_hw *hw, char *name, umode_t mode,
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void *data, const struct file_operations *fops)
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{
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struct dentry *d = NULL;
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if (hw->core->dentry)
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d = debugfs_create_file(name, mode, hw->core->dentry, data,
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fops);
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return d;
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}
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EXPORT_SYMBOL_GPL(clk_debugfs_add_file);
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/**
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* clk_debug_init - lazily create the debugfs clk tree visualization
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*
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* clks are often initialized very early during boot before memory can
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* be dynamically allocated and well before debugfs is setup.
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* clk_debug_init walks the clk tree hierarchy while holding
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* prepare_lock and creates the topology as part of a late_initcall,
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* thus insuring that clks initialized very early will still be
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* represented in the debugfs clk tree. This function should only be
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* called once at boot-time, and all other clks added dynamically will
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* be done so with clk_debug_register.
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*/
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static int __init clk_debug_init(void)
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{
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struct clk_core *core;
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struct dentry *d;
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rootdir = debugfs_create_dir("clk", NULL);
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if (!rootdir)
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return -ENOMEM;
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d = debugfs_create_file("clk_summary", S_IRUGO, rootdir, &all_lists,
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&clk_summary_fops);
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if (!d)
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return -ENOMEM;
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d = debugfs_create_file("clk_dump", S_IRUGO, rootdir, &all_lists,
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&clk_dump_fops);
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if (!d)
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return -ENOMEM;
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d = debugfs_create_file("clk_orphan_summary", S_IRUGO, rootdir,
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&orphan_list, &clk_summary_fops);
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if (!d)
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return -ENOMEM;
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d = debugfs_create_file("clk_orphan_dump", S_IRUGO, rootdir,
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&orphan_list, &clk_dump_fops);
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if (!d)
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return -ENOMEM;
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mutex_lock(&clk_debug_lock);
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hlist_for_each_entry(core, &clk_debug_list, debug_node)
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clk_debug_create_one(core, rootdir);
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inited = 1;
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mutex_unlock(&clk_debug_lock);
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return 0;
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}
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late_initcall(clk_debug_init);
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#else
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static inline int clk_debug_register(struct clk_core *core) { return 0; }
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static inline void clk_debug_reparent(struct clk_core *core,
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struct clk_core *new_parent)
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{
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}
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static inline void clk_debug_unregister(struct clk_core *core)
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{
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}
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#endif
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/* caller must hold prepare_lock */
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static void clk_unprepare_unused_subtree(struct clk_core *core)
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{
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@ -608,6 +292,49 @@ struct clk *__clk_get_parent(struct clk *clk)
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}
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EXPORT_SYMBOL_GPL(__clk_get_parent);
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static struct clk_core *__clk_lookup_subtree(const char *name,
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struct clk_core *core)
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{
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struct clk_core *child;
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struct clk_core *ret;
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if (!strcmp(core->name, name))
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return core;
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hlist_for_each_entry(child, &core->children, child_node) {
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ret = __clk_lookup_subtree(name, child);
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if (ret)
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return ret;
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}
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return NULL;
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}
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static struct clk_core *clk_core_lookup(const char *name)
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{
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struct clk_core *root_clk;
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struct clk_core *ret;
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if (!name)
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return NULL;
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/* search the 'proper' clk tree first */
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hlist_for_each_entry(root_clk, &clk_root_list, child_node) {
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ret = __clk_lookup_subtree(name, root_clk);
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if (ret)
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return ret;
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}
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/* if not found, then search the orphan tree */
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hlist_for_each_entry(root_clk, &clk_orphan_list, child_node) {
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ret = __clk_lookup_subtree(name, root_clk);
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if (ret)
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return ret;
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}
|
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|
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return NULL;
|
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}
|
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|
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static struct clk_core *clk_core_get_parent_by_index(struct clk_core *core,
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u8 index)
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{
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|
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@ -684,27 +411,6 @@ unsigned long __clk_get_flags(struct clk *clk)
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}
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EXPORT_SYMBOL_GPL(__clk_get_flags);
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static bool clk_core_is_prepared(struct clk_core *core)
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{
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int ret;
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|
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if (!core)
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return false;
|
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|
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/*
|
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* .is_prepared is optional for clocks that can prepare
|
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* fall back to software usage counter if it is missing
|
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*/
|
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if (!core->ops->is_prepared) {
|
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ret = core->prepare_count ? 1 : 0;
|
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goto out;
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||||
}
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||||
|
||||
ret = core->ops->is_prepared(core->hw);
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||||
out:
|
||||
return !!ret;
|
||||
}
|
||||
|
||||
bool __clk_is_prepared(struct clk *clk)
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||||
{
|
||||
if (!clk)
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||||
|
|
@ -713,27 +419,6 @@ bool __clk_is_prepared(struct clk *clk)
|
|||
return clk_core_is_prepared(clk->core);
|
||||
}
|
||||
|
||||
static bool clk_core_is_enabled(struct clk_core *core)
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||||
{
|
||||
int ret;
|
||||
|
||||
if (!core)
|
||||
return false;
|
||||
|
||||
/*
|
||||
* .is_enabled is only mandatory for clocks that gate
|
||||
* fall back to software usage counter if .is_enabled is missing
|
||||
*/
|
||||
if (!core->ops->is_enabled) {
|
||||
ret = core->enable_count ? 1 : 0;
|
||||
goto out;
|
||||
}
|
||||
|
||||
ret = core->ops->is_enabled(core->hw);
|
||||
out:
|
||||
return !!ret;
|
||||
}
|
||||
|
||||
bool __clk_is_enabled(struct clk *clk)
|
||||
{
|
||||
if (!clk)
|
||||
|
|
@ -743,49 +428,6 @@ bool __clk_is_enabled(struct clk *clk)
|
|||
}
|
||||
EXPORT_SYMBOL_GPL(__clk_is_enabled);
|
||||
|
||||
static struct clk_core *__clk_lookup_subtree(const char *name,
|
||||
struct clk_core *core)
|
||||
{
|
||||
struct clk_core *child;
|
||||
struct clk_core *ret;
|
||||
|
||||
if (!strcmp(core->name, name))
|
||||
return core;
|
||||
|
||||
hlist_for_each_entry(child, &core->children, child_node) {
|
||||
ret = __clk_lookup_subtree(name, child);
|
||||
if (ret)
|
||||
return ret;
|
||||
}
|
||||
|
||||
return NULL;
|
||||
}
|
||||
|
||||
static struct clk_core *clk_core_lookup(const char *name)
|
||||
{
|
||||
struct clk_core *root_clk;
|
||||
struct clk_core *ret;
|
||||
|
||||
if (!name)
|
||||
return NULL;
|
||||
|
||||
/* search the 'proper' clk tree first */
|
||||
hlist_for_each_entry(root_clk, &clk_root_list, child_node) {
|
||||
ret = __clk_lookup_subtree(name, root_clk);
|
||||
if (ret)
|
||||
return ret;
|
||||
}
|
||||
|
||||
/* if not found, then search the orphan tree */
|
||||
hlist_for_each_entry(root_clk, &clk_orphan_list, child_node) {
|
||||
ret = __clk_lookup_subtree(name, root_clk);
|
||||
if (ret)
|
||||
return ret;
|
||||
}
|
||||
|
||||
return NULL;
|
||||
}
|
||||
|
||||
static bool mux_is_better_rate(unsigned long rate, unsigned long now,
|
||||
unsigned long best, unsigned long flags)
|
||||
{
|
||||
|
|
@ -2190,7 +1832,6 @@ static int clk_core_get_phase(struct clk_core *core)
|
|||
|
||||
return ret;
|
||||
}
|
||||
EXPORT_SYMBOL_GPL(clk_get_phase);
|
||||
|
||||
/**
|
||||
* clk_get_phase - return the phase shift of a clock signal
|
||||
|
|
@ -2206,6 +1847,7 @@ int clk_get_phase(struct clk *clk)
|
|||
|
||||
return clk_core_get_phase(clk->core);
|
||||
}
|
||||
EXPORT_SYMBOL_GPL(clk_get_phase);
|
||||
|
||||
/**
|
||||
* clk_is_match - check if two clk's point to the same hardware clock
|
||||
|
|
@ -2233,6 +1875,339 @@ bool clk_is_match(const struct clk *p, const struct clk *q)
|
|||
}
|
||||
EXPORT_SYMBOL_GPL(clk_is_match);
|
||||
|
||||
/*** debugfs support ***/
|
||||
|
||||
#ifdef CONFIG_DEBUG_FS
|
||||
#include <linux/debugfs.h>
|
||||
|
||||
static struct dentry *rootdir;
|
||||
static int inited = 0;
|
||||
static DEFINE_MUTEX(clk_debug_lock);
|
||||
static HLIST_HEAD(clk_debug_list);
|
||||
|
||||
static struct hlist_head *all_lists[] = {
|
||||
&clk_root_list,
|
||||
&clk_orphan_list,
|
||||
NULL,
|
||||
};
|
||||
|
||||
static struct hlist_head *orphan_list[] = {
|
||||
&clk_orphan_list,
|
||||
NULL,
|
||||
};
|
||||
|
||||
static void clk_summary_show_one(struct seq_file *s, struct clk_core *c,
|
||||
int level)
|
||||
{
|
||||
if (!c)
|
||||
return;
|
||||
|
||||
seq_printf(s, "%*s%-*s %11d %12d %11lu %10lu %-3d\n",
|
||||
level * 3 + 1, "",
|
||||
30 - level * 3, c->name,
|
||||
c->enable_count, c->prepare_count, clk_core_get_rate(c),
|
||||
clk_core_get_accuracy(c), clk_core_get_phase(c));
|
||||
}
|
||||
|
||||
static void clk_summary_show_subtree(struct seq_file *s, struct clk_core *c,
|
||||
int level)
|
||||
{
|
||||
struct clk_core *child;
|
||||
|
||||
if (!c)
|
||||
return;
|
||||
|
||||
clk_summary_show_one(s, c, level);
|
||||
|
||||
hlist_for_each_entry(child, &c->children, child_node)
|
||||
clk_summary_show_subtree(s, child, level + 1);
|
||||
}
|
||||
|
||||
static int clk_summary_show(struct seq_file *s, void *data)
|
||||
{
|
||||
struct clk_core *c;
|
||||
struct hlist_head **lists = (struct hlist_head **)s->private;
|
||||
|
||||
seq_puts(s, " clock enable_cnt prepare_cnt rate accuracy phase\n");
|
||||
seq_puts(s, "----------------------------------------------------------------------------------------\n");
|
||||
|
||||
clk_prepare_lock();
|
||||
|
||||
for (; *lists; lists++)
|
||||
hlist_for_each_entry(c, *lists, child_node)
|
||||
clk_summary_show_subtree(s, c, 0);
|
||||
|
||||
clk_prepare_unlock();
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
|
||||
static int clk_summary_open(struct inode *inode, struct file *file)
|
||||
{
|
||||
return single_open(file, clk_summary_show, inode->i_private);
|
||||
}
|
||||
|
||||
static const struct file_operations clk_summary_fops = {
|
||||
.open = clk_summary_open,
|
||||
.read = seq_read,
|
||||
.llseek = seq_lseek,
|
||||
.release = single_release,
|
||||
};
|
||||
|
||||
static void clk_dump_one(struct seq_file *s, struct clk_core *c, int level)
|
||||
{
|
||||
if (!c)
|
||||
return;
|
||||
|
||||
seq_printf(s, "\"%s\": { ", c->name);
|
||||
seq_printf(s, "\"enable_count\": %d,", c->enable_count);
|
||||
seq_printf(s, "\"prepare_count\": %d,", c->prepare_count);
|
||||
seq_printf(s, "\"rate\": %lu", clk_core_get_rate(c));
|
||||
seq_printf(s, "\"accuracy\": %lu", clk_core_get_accuracy(c));
|
||||
seq_printf(s, "\"phase\": %d", clk_core_get_phase(c));
|
||||
}
|
||||
|
||||
static void clk_dump_subtree(struct seq_file *s, struct clk_core *c, int level)
|
||||
{
|
||||
struct clk_core *child;
|
||||
|
||||
if (!c)
|
||||
return;
|
||||
|
||||
clk_dump_one(s, c, level);
|
||||
|
||||
hlist_for_each_entry(child, &c->children, child_node) {
|
||||
seq_printf(s, ",");
|
||||
clk_dump_subtree(s, child, level + 1);
|
||||
}
|
||||
|
||||
seq_printf(s, "}");
|
||||
}
|
||||
|
||||
static int clk_dump(struct seq_file *s, void *data)
|
||||
{
|
||||
struct clk_core *c;
|
||||
bool first_node = true;
|
||||
struct hlist_head **lists = (struct hlist_head **)s->private;
|
||||
|
||||
seq_printf(s, "{");
|
||||
|
||||
clk_prepare_lock();
|
||||
|
||||
for (; *lists; lists++) {
|
||||
hlist_for_each_entry(c, *lists, child_node) {
|
||||
if (!first_node)
|
||||
seq_puts(s, ",");
|
||||
first_node = false;
|
||||
clk_dump_subtree(s, c, 0);
|
||||
}
|
||||
}
|
||||
|
||||
clk_prepare_unlock();
|
||||
|
||||
seq_printf(s, "}");
|
||||
return 0;
|
||||
}
|
||||
|
||||
|
||||
static int clk_dump_open(struct inode *inode, struct file *file)
|
||||
{
|
||||
return single_open(file, clk_dump, inode->i_private);
|
||||
}
|
||||
|
||||
static const struct file_operations clk_dump_fops = {
|
||||
.open = clk_dump_open,
|
||||
.read = seq_read,
|
||||
.llseek = seq_lseek,
|
||||
.release = single_release,
|
||||
};
|
||||
|
||||
static int clk_debug_create_one(struct clk_core *core, struct dentry *pdentry)
|
||||
{
|
||||
struct dentry *d;
|
||||
int ret = -ENOMEM;
|
||||
|
||||
if (!core || !pdentry) {
|
||||
ret = -EINVAL;
|
||||
goto out;
|
||||
}
|
||||
|
||||
d = debugfs_create_dir(core->name, pdentry);
|
||||
if (!d)
|
||||
goto out;
|
||||
|
||||
core->dentry = d;
|
||||
|
||||
d = debugfs_create_u32("clk_rate", S_IRUGO, core->dentry,
|
||||
(u32 *)&core->rate);
|
||||
if (!d)
|
||||
goto err_out;
|
||||
|
||||
d = debugfs_create_u32("clk_accuracy", S_IRUGO, core->dentry,
|
||||
(u32 *)&core->accuracy);
|
||||
if (!d)
|
||||
goto err_out;
|
||||
|
||||
d = debugfs_create_u32("clk_phase", S_IRUGO, core->dentry,
|
||||
(u32 *)&core->phase);
|
||||
if (!d)
|
||||
goto err_out;
|
||||
|
||||
d = debugfs_create_x32("clk_flags", S_IRUGO, core->dentry,
|
||||
(u32 *)&core->flags);
|
||||
if (!d)
|
||||
goto err_out;
|
||||
|
||||
d = debugfs_create_u32("clk_prepare_count", S_IRUGO, core->dentry,
|
||||
(u32 *)&core->prepare_count);
|
||||
if (!d)
|
||||
goto err_out;
|
||||
|
||||
d = debugfs_create_u32("clk_enable_count", S_IRUGO, core->dentry,
|
||||
(u32 *)&core->enable_count);
|
||||
if (!d)
|
||||
goto err_out;
|
||||
|
||||
d = debugfs_create_u32("clk_notifier_count", S_IRUGO, core->dentry,
|
||||
(u32 *)&core->notifier_count);
|
||||
if (!d)
|
||||
goto err_out;
|
||||
|
||||
if (core->ops->debug_init) {
|
||||
ret = core->ops->debug_init(core->hw, core->dentry);
|
||||
if (ret)
|
||||
goto err_out;
|
||||
}
|
||||
|
||||
ret = 0;
|
||||
goto out;
|
||||
|
||||
err_out:
|
||||
debugfs_remove_recursive(core->dentry);
|
||||
core->dentry = NULL;
|
||||
out:
|
||||
return ret;
|
||||
}
|
||||
|
||||
/**
|
||||
* clk_debug_register - add a clk node to the debugfs clk tree
|
||||
* @core: the clk being added to the debugfs clk tree
|
||||
*
|
||||
* Dynamically adds a clk to the debugfs clk tree if debugfs has been
|
||||
* initialized. Otherwise it bails out early since the debugfs clk tree
|
||||
* will be created lazily by clk_debug_init as part of a late_initcall.
|
||||
*/
|
||||
static int clk_debug_register(struct clk_core *core)
|
||||
{
|
||||
int ret = 0;
|
||||
|
||||
mutex_lock(&clk_debug_lock);
|
||||
hlist_add_head(&core->debug_node, &clk_debug_list);
|
||||
|
||||
if (!inited)
|
||||
goto unlock;
|
||||
|
||||
ret = clk_debug_create_one(core, rootdir);
|
||||
unlock:
|
||||
mutex_unlock(&clk_debug_lock);
|
||||
|
||||
return ret;
|
||||
}
|
||||
|
||||
/**
|
||||
* clk_debug_unregister - remove a clk node from the debugfs clk tree
|
||||
* @core: the clk being removed from the debugfs clk tree
|
||||
*
|
||||
* Dynamically removes a clk and all it's children clk nodes from the
|
||||
* debugfs clk tree if clk->dentry points to debugfs created by
|
||||
* clk_debug_register in __clk_init.
|
||||
*/
|
||||
static void clk_debug_unregister(struct clk_core *core)
|
||||
{
|
||||
mutex_lock(&clk_debug_lock);
|
||||
hlist_del_init(&core->debug_node);
|
||||
debugfs_remove_recursive(core->dentry);
|
||||
core->dentry = NULL;
|
||||
mutex_unlock(&clk_debug_lock);
|
||||
}
|
||||
|
||||
struct dentry *clk_debugfs_add_file(struct clk_hw *hw, char *name, umode_t mode,
|
||||
void *data, const struct file_operations *fops)
|
||||
{
|
||||
struct dentry *d = NULL;
|
||||
|
||||
if (hw->core->dentry)
|
||||
d = debugfs_create_file(name, mode, hw->core->dentry, data,
|
||||
fops);
|
||||
|
||||
return d;
|
||||
}
|
||||
EXPORT_SYMBOL_GPL(clk_debugfs_add_file);
|
||||
|
||||
/**
|
||||
* clk_debug_init - lazily create the debugfs clk tree visualization
|
||||
*
|
||||
* clks are often initialized very early during boot before memory can
|
||||
* be dynamically allocated and well before debugfs is setup.
|
||||
* clk_debug_init walks the clk tree hierarchy while holding
|
||||
* prepare_lock and creates the topology as part of a late_initcall,
|
||||
* thus insuring that clks initialized very early will still be
|
||||
* represented in the debugfs clk tree. This function should only be
|
||||
* called once at boot-time, and all other clks added dynamically will
|
||||
* be done so with clk_debug_register.
|
||||
*/
|
||||
static int __init clk_debug_init(void)
|
||||
{
|
||||
struct clk_core *core;
|
||||
struct dentry *d;
|
||||
|
||||
rootdir = debugfs_create_dir("clk", NULL);
|
||||
|
||||
if (!rootdir)
|
||||
return -ENOMEM;
|
||||
|
||||
d = debugfs_create_file("clk_summary", S_IRUGO, rootdir, &all_lists,
|
||||
&clk_summary_fops);
|
||||
if (!d)
|
||||
return -ENOMEM;
|
||||
|
||||
d = debugfs_create_file("clk_dump", S_IRUGO, rootdir, &all_lists,
|
||||
&clk_dump_fops);
|
||||
if (!d)
|
||||
return -ENOMEM;
|
||||
|
||||
d = debugfs_create_file("clk_orphan_summary", S_IRUGO, rootdir,
|
||||
&orphan_list, &clk_summary_fops);
|
||||
if (!d)
|
||||
return -ENOMEM;
|
||||
|
||||
d = debugfs_create_file("clk_orphan_dump", S_IRUGO, rootdir,
|
||||
&orphan_list, &clk_dump_fops);
|
||||
if (!d)
|
||||
return -ENOMEM;
|
||||
|
||||
mutex_lock(&clk_debug_lock);
|
||||
hlist_for_each_entry(core, &clk_debug_list, debug_node)
|
||||
clk_debug_create_one(core, rootdir);
|
||||
|
||||
inited = 1;
|
||||
mutex_unlock(&clk_debug_lock);
|
||||
|
||||
return 0;
|
||||
}
|
||||
late_initcall(clk_debug_init);
|
||||
#else
|
||||
static inline int clk_debug_register(struct clk_core *core) { return 0; }
|
||||
static inline void clk_debug_reparent(struct clk_core *core,
|
||||
struct clk_core *new_parent)
|
||||
{
|
||||
}
|
||||
static inline void clk_debug_unregister(struct clk_core *core)
|
||||
{
|
||||
}
|
||||
#endif
|
||||
|
||||
/**
|
||||
* __clk_init - initialize the data structures in a struct clk
|
||||
* @dev: device initializing this clk, placeholder for now
|
||||
|
|
|
|||
Загрузка…
Ссылка в новой задаче