mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-05 08:36:47 +07:00
clk: flatten clk tree in debugfs
This patch flattens the clk tree in CCF debugfs. Instead of representing the clocks and their hierarchy as a directory structure under /sys/kernel/debug/clk, each clock gets a single directory directly under /sys/kernel/debug/clk. The orphans directory is replaced by a file called clk_orphan_summary. Signed-off-by: Peter De Schrijver <pdeschrijver@nvidia.com> Signed-off-by: Mike Turquette <mturquette@linaro.org>
This commit is contained in:
Peter De Schrijver
Mike Turquette
parent
d8e53c3deb
commit
27b8d5f723
@ -36,6 +36,17 @@ 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 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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/*** locking ***/
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static void clk_prepare_lock(void)
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{
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@ -98,7 +109,6 @@ static void clk_enable_unlock(unsigned long flags)
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#include <linux/debugfs.h>
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static struct dentry *rootdir;
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static struct dentry *orphandir;
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static int inited = 0;
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static void clk_summary_show_one(struct seq_file *s, struct clk *c, int level)
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@ -130,17 +140,16 @@ static void clk_summary_show_subtree(struct seq_file *s, struct clk *c,
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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 *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\n");
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seq_puts(s, "--------------------------------------------------------------------------------\n");
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clk_prepare_lock();
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hlist_for_each_entry(c, &clk_root_list, child_node)
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clk_summary_show_subtree(s, c, 0);
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hlist_for_each_entry(c, &clk_orphan_list, child_node)
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clk_summary_show_subtree(s, c, 0);
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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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@ -193,21 +202,19 @@ static int clk_dump(struct seq_file *s, void *data)
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{
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struct clk *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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hlist_for_each_entry(c, &clk_root_list, child_node) {
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if (!first_node)
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seq_printf(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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hlist_for_each_entry(c, &clk_orphan_list, child_node) {
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seq_printf(s, ",");
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clk_dump_subtree(s, c, 0);
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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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@ -305,7 +312,7 @@ static int clk_debug_create_subtree(struct clk *clk, struct dentry *pdentry)
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goto out;
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hlist_for_each_entry(child, &clk->children, child_node)
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clk_debug_create_subtree(child, clk->dentry);
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clk_debug_create_subtree(child, pdentry);
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ret = 0;
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out:
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@ -325,31 +332,12 @@ static int clk_debug_create_subtree(struct clk *clk, struct dentry *pdentry)
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*/
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static int clk_debug_register(struct clk *clk)
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{
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struct clk *parent;
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struct dentry *pdentry;
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int ret = 0;
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if (!inited)
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goto out;
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parent = clk->parent;
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/*
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* Check to see if a clk is a root clk. Also check that it is
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* safe to add this clk to debugfs
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*/
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if (!parent)
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if (clk->flags & CLK_IS_ROOT)
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pdentry = rootdir;
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else
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pdentry = orphandir;
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else
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if (parent->dentry)
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pdentry = parent->dentry;
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else
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goto out;
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ret = clk_debug_create_subtree(clk, pdentry);
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ret = clk_debug_create_subtree(clk, rootdir);
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out:
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return ret;
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@ -370,39 +358,6 @@ static void clk_debug_unregister(struct clk *clk)
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debugfs_remove_recursive(clk->dentry);
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}
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/**
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* clk_debug_reparent - reparent clk node in the debugfs clk tree
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* @clk: the clk being reparented
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* @new_parent: the new clk parent, may be NULL
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*
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* Rename clk entry in 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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* Caller must hold prepare_lock.
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*/
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static void clk_debug_reparent(struct clk *clk, struct clk *new_parent)
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{
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struct dentry *d;
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struct dentry *new_parent_d;
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if (!inited)
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return;
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if (new_parent)
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new_parent_d = new_parent->dentry;
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else
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new_parent_d = orphandir;
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d = debugfs_rename(clk->dentry->d_parent, clk->dentry,
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new_parent_d, clk->name);
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if (d)
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clk->dentry = d;
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else
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pr_debug("%s: failed to rename debugfs entry for %s\n",
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__func__, clk->name);
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}
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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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@ -425,19 +380,24 @@ static int __init clk_debug_init(void)
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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, NULL,
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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, NULL,
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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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orphandir = debugfs_create_dir("orphans", rootdir);
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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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if (!orphandir)
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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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clk_prepare_lock();
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@ -446,7 +406,7 @@ static int __init clk_debug_init(void)
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clk_debug_create_subtree(clk, rootdir);
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hlist_for_each_entry(clk, &clk_orphan_list, child_node)
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clk_debug_create_subtree(clk, orphandir);
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clk_debug_create_subtree(clk, rootdir);
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inited = 1;
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@ -1284,9 +1244,6 @@ static void __clk_set_parent_after(struct clk *clk, struct clk *parent,
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clk_disable(old_parent);
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__clk_unprepare(old_parent);
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}
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/* update debugfs with new clk tree topology */
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clk_debug_reparent(clk, parent);
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}
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static int __clk_set_parent(struct clk *clk, struct clk *parent, u8 p_index)
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@ -1683,7 +1640,6 @@ static struct clk *__clk_init_parent(struct clk *clk)
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void __clk_reparent(struct clk *clk, struct clk *new_parent)
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{
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clk_reparent(clk, new_parent);
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clk_debug_reparent(clk, new_parent);
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__clk_recalc_accuracies(clk);
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__clk_recalc_rates(clk, POST_RATE_CHANGE);
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}
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