The patch titled
Subject: scripts/gdb: initial clk support: lx-clk-summary
has been added to the -mm tree. Its filename is
scripts-gdb-initial-clk-support-lx-clk-summary.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/scripts-gdb-initial-clk-support-lx-clk-summary.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/scripts-gdb-initial-clk-support-lx-clk-summary.patch
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------------------------------------------------------
From: Leonard Crestez <leonard.crestez@xxxxxxx>
Subject: scripts/gdb: initial clk support: lx-clk-summary
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@xxxxxxx>
Cc: Jan Kiszka <jan.kiszka@xxxxxxxxxxx>
Cc: Jason Wessel <jason.wessel@xxxxxxxxxxxxx>
Cc: Kieran Bingham <kbingham@xxxxxxxxxx>
Cc: Stephen Boyd <swboyd@xxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
scripts/gdb/linux/clk.py | 46 +++++++++++++++++++++++++++++++++++
scripts/gdb/vmlinux-gdb.py | 1
2 files changed, 47 insertions(+)
--- /dev/null
+++ a/scripts/gdb/linux/clk.py
@@ -0,0 +1,46 @@
+# SPDX-License-Identifier: GPL-2.0
+#
+# Copyright (c) NXP 2019
+
+import gdb
+import sys
+
+from linux import utils, lists
+
+clk_core_type = utils.CachedType("struct clk_core")
+
+
+def clk_core_for_each_child(hlist_head):
+ return lists.hlist_for_each_entry(hlist_head,
+ clk_core_type.get_type().pointer(), "child_node")
+
+
+class LxClkSummary(gdb.Command):
+ """Print Linux kernel log buffer."""
+
+ def __init__(self):
+ super(LxClkSummary, self).__init__("lx-clk-summary", gdb.COMMAND_DATA)
+
+ def show_subtree(self, clk, level):
+ gdb.write("%*s%-*s %7d %8d %8d\n" % (
+ level * 3 + 1, "",
+ 30 - level * 3,
+ clk['name'].string(),
+ clk['enable_count'],
+ clk['prepare_count'],
+ clk['protect_count']))
+
+ for child in clk_core_for_each_child(clk['children']):
+ self.show_subtree(child, level + 1)
+
+ def invoke(self, arg, from_tty):
+ gdb.write(" enable prepare protect\n")
+ gdb.write(" clock count count count\n")
+ gdb.write("---------------------------------------------------------\n")
+ for clk in clk_core_for_each_child(gdb.parse_and_eval("clk_root_list")):
+ self.show_subtree(clk, 0)
+ for clk in clk_core_for_each_child(gdb.parse_and_eval("clk_orphan_list")):
+ self.show_subtree(clk, 0)
+
+
+LxClkSummary()
--- a/scripts/gdb/vmlinux-gdb.py~scripts-gdb-initial-clk-support-lx-clk-summary
+++ a/scripts/gdb/vmlinux-gdb.py
@@ -34,3 +34,4 @@ else:
import linux.proc
import linux.constants
import linux.timerlist
+ import linux.clk
_
Patches currently in -mm which might be from leonard.crestez@xxxxxxx are
scripts-gdb-add-hlist-utilities.patch
scripts-gdb-initial-clk-support-lx-clk-summary.patch
scripts-gdb-add-lx_clk_core_lookup-function.patch
