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clk: add/modify debugfs support for clocks

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Update clock debugfs to support the below functionalities.
 - Allow enabling/disabling a clock.
 - Allow calling set_rate on a clock.
 - Display the list of enabled_clocks along with prepare_count,
   enable_count and rate.
 - Add a trace_clocks node to dump the current state of all clocks
   in the ftrace logs.

Change-Id: Ib67b3a3409c9e7d8adb710bb524f54f543abf712
Signed-off-by: Taniya Das <tdas@codeaurora.org>
Signed-off-by: David Dai <daidavid1@codeaurora.org>
Signed-off-by: Mike Tipton <mdtipton@codeaurora.org>
This commit is contained in:
Taniya Das 2016-11-14 11:26:02 +05:30 • committed by Mike Tipton
commit fd4adb4c8c
5 changed files with 289 additions and 3 deletions
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38
include/trace/events/clk.h
View file

@ -1,6 +1,6 @@
/* SPDX-License-Identifier: GPL-2.0-only */
/*
* Copyright (c) 2014-2015, The Linux Foundation. All rights reserved.
* Copyright (c) 2014-2016, The Linux Foundation. All rights reserved.
*/
#undef TRACE_SYSTEM
#define TRACE_SYSTEM clk
@ -220,6 +220,42 @@ DEFINE_EVENT(clk_duty_cycle, clk_set_duty_cycle_complete,
TP_ARGS(core, duty)
);
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 */