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. Signed-off-by: Leonard Crestez <[email protected]> --- scripts/gdb/linux/clk.py | 46 ++++++++++++++++++++++++++++++++++++++ scripts/gdb/vmlinux-gdb.py | 1 + 2 files changed, 47 insertions(+) create mode 100644 scripts/gdb/linux/clk.py diff --git a/scripts/gdb/linux/clk.py b/scripts/gdb/linux/clk.py new file mode 100644 index 000000000000..a9129d865c5d --- /dev/null +++ b/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() diff --git a/scripts/gdb/vmlinux-gdb.py b/scripts/gdb/vmlinux-gdb.py index 033578cc4cd7..eff5a48ac026 100644 --- a/scripts/gdb/vmlinux-gdb.py +++ b/scripts/gdb/vmlinux-gdb.py @@ -32,5 +32,6 @@ else: import linux.lists import linux.rbtree import linux.proc import linux.constants import linux.timerlist + import linux.clk -- 2.17.1
