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d1e9710b63
Add an lx-clk-summary command which prints a subset of /sys/kernel/debug/clk/clk_summary. This can be used to examine hangs caused by clk not being enabled. Link: http://lkml.kernel.org/r/Message-ID: Signed-off-by: Leonard Crestez <leonard.crestez@nxp.com> Cc: Jan Kiszka <jan.kiszka@siemens.com> Cc: Jason Wessel <jason.wessel@windriver.com> Cc: Kieran Bingham <kbingham@kernel.org> Cc: Stephen Boyd <swboyd@chromium.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
46 lines
1.4 KiB
Python
46 lines
1.4 KiB
Python
# SPDX-License-Identifier: GPL-2.0
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#
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# Copyright (c) NXP 2019
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import gdb
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import sys
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from linux import utils, lists
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clk_core_type = utils.CachedType("struct clk_core")
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def clk_core_for_each_child(hlist_head):
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return lists.hlist_for_each_entry(hlist_head,
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clk_core_type.get_type().pointer(), "child_node")
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class LxClkSummary(gdb.Command):
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"""Print Linux kernel log buffer."""
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def __init__(self):
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super(LxClkSummary, self).__init__("lx-clk-summary", gdb.COMMAND_DATA)
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def show_subtree(self, clk, level):
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gdb.write("%*s%-*s %7d %8d %8d\n" % (
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level * 3 + 1, "",
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30 - level * 3,
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clk['name'].string(),
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clk['enable_count'],
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clk['prepare_count'],
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clk['protect_count']))
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for child in clk_core_for_each_child(clk['children']):
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self.show_subtree(child, level + 1)
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def invoke(self, arg, from_tty):
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gdb.write(" enable prepare protect\n")
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gdb.write(" clock count count count\n")
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gdb.write("---------------------------------------------------------\n")
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for clk in clk_core_for_each_child(gdb.parse_and_eval("clk_root_list")):
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self.show_subtree(clk, 0)
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for clk in clk_core_for_each_child(gdb.parse_and_eval("clk_orphan_list")):
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self.show_subtree(clk, 0)
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LxClkSummary()
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