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scripts/gdb: print cached rate in lx-clk-summary

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The clk rate is always stored in clk_core but might be out of date and
require calls to update from hardware.

Deal with that case by printing a (c) suffix.

Link: http://lkml.kernel.org/r/1a474318982a5f0125f2360c4161029b17f56bd1.1556881728.git.leonard.crestez@nxp.com
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>
This commit is contained in:
Leonard Crestez 2019-05-14 15:46:17 -07:00 committed by Linus Torvalds
parent 66d5c7c60a
commit e7e6f462c1
2 changed files with 18 additions and 7 deletions
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21
scripts/gdb/linux/clk.py
View File

@ -5,7 +5,7 @@
import gdb
import sys
from linux import utils, lists
from linux import utils, lists, constants
clk_core_type = utils.CachedType("struct clk_core")
@ -16,27 +16,34 @@ def clk_core_for_each_child(hlist_head):
class LxClkSummary(gdb.Command):
"""Print Linux kernel log buffer."""
"""Print clk tree summary
Output is a subset of /sys/kernel/debug/clk/clk_summary
No calls are made during printing, instead a (c) if printed after values which
are cached and potentially out of date"""
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" % (
gdb.write("%*s%-*s %7d %8d %8d %11lu%s\n" % (
level * 3 + 1, "",
30 - level * 3,
clk['name'].string(),
clk['enable_count'],
clk['prepare_count'],
clk['protect_count']))
clk['protect_count'],
clk['rate'],
'(c)' if clk['flags'] & constants.LX_CLK_GET_RATE_NOCACHE else ' '))
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")
gdb.write(" enable prepare protect \n")
gdb.write(" clock count count count rate \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")):

4
scripts/gdb/linux/constants.py.in
View File

@ -12,6 +12,7 @@
*
*/
#include <linux/clk-provider.h>
#include <linux/fs.h>
#include <linux/hrtimer.h>
#include <linux/mount.h>
@ -38,6 +39,9 @@
import gdb
/* linux/clk-provider.h */
LX_GDBPARSED(CLK_GET_RATE_NOCACHE)
/* linux/fs.h */
LX_VALUE(SB_RDONLY)
LX_VALUE(SB_SYNCHRONOUS)