Merge "clk: Add support to dump state of all clocks into ftrace" (52f8817d) · Commits · e / devices / android_kernel_sony_msm8998

drivers/clk/clk.c

+55 −0

Original line number	Diff line number	Diff line
		@@ -2326,6 +2326,56 @@ static struct hlist_head *orphan_list[] = {
		NULL,
		};

		static void clk_state_subtree(struct clk_core *c)
		{
		int vdd_level = 0;
		struct clk_core *child;

		if (!c)
		return;

		if (c->vdd_class) {
		vdd_level = clk_find_vdd_level(c, c->rate);
		if (vdd_level < 0)
		vdd_level = 0;
		}

		trace_clk_state(c->name, c->prepare_count, c->enable_count,
		c->rate, vdd_level);

		hlist_for_each_entry(child, &c->children, child_node)
		clk_state_subtree(child);
		}

		static int clk_state_show(struct seq_file s, void data)
		{
		struct clk_core *c;
		struct hlist_head lists = (struct hlist_head )s->private;

		clk_prepare_lock();

		for (; *lists; lists++)
		hlist_for_each_entry(c, *lists, child_node)
		clk_state_subtree(c);

		clk_prepare_unlock();

		return 0;
		}


		static int clk_state_open(struct inode inode, struct file file)
		{
		return single_open(file, clk_state_show, inode->i_private);
		}

		static const struct file_operations clk_state_fops = {
		.open = clk_state_open,
		.read = seq_read,
		.llseek = seq_lseek,
		.release = single_release,
		};

		static void clk_summary_show_one(struct seq_file s, struct clk_core c,
		int level)
		{
		@@ -3002,6 +3052,11 @@ static int __init clk_debug_init(void)
		if (!d)
		return -ENOMEM;

		d = debugfs_create_file("trace_clocks", S_IRUGO, rootdir, &all_lists,
		&clk_state_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);

+37 −1

Original line number	Diff line number	Diff line
		/*
		* Copyright (c) 2014-2015, The Linux Foundation. All rights reserved.
		* Copyright (c) 2014-2015, 2017, The Linux Foundation. All rights reserved.
		*
		* This software is licensed under the terms of the GNU General Public
		* License version 2, as published by the Free Software Foundation, and
		@@ -192,6 +192,42 @@ DEFINE_EVENT(clk_phase, clk_set_phase_complete,
		TP_ARGS(core, phase)
		);

		DECLARE_EVENT_CLASS(clk_state_dump,

		TP_PROTO(const char *name, unsigned int prepare_count,
		unsigned int enable_count, unsigned long rate, unsigned int vdd_level),

		TP_ARGS(name, prepare_count, enable_count, rate, vdd_level),

		TP_STRUCT__entry(
		__string(name, name)
		__field(unsigned int, prepare_count)
		__field(unsigned int, enable_count)
		__field(unsigned long, rate)
		__field(unsigned int, vdd_level)
		),

		TP_fast_assign(
		__assign_str(name, name);
		__entry->prepare_count = prepare_count;
		__entry->enable_count = enable_count;
		__entry->rate = rate;
		__entry->vdd_level = vdd_level;
		),

		TP_printk("%s\tprepare:enable cnt [%u:%u]\trate: vdd_level [%lu:%u]",
		__get_str(name), __entry->prepare_count, __entry->enable_count,
		__entry->rate, __entry->vdd_level)
		);

		DEFINE_EVENT(clk_state_dump, clk_state,

		TP_PROTO(const char *name, unsigned int prepare_count,
		unsigned int enable_count, unsigned long rate, unsigned int vdd_level),

		TP_ARGS(name, prepare_count, enable_count, rate, vdd_level)
		);

		#endif /* _TRACE_CLK_H */

		/* This part must be outside protection */