scripts/gdb: print cached rate in lx-clk-summary
The clk rate is always stored in clk_core but might be out of date and require calls to update from hardware.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>
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@ -5,7 +5,7 @@
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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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from linux import utils, lists, constants
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clk_core_type = utils.CachedType("struct clk_core")
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@ -16,27 +16,34 @@ def clk_core_for_each_child(hlist_head):
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class LxClkSummary(gdb.Command):
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"""Print Linux kernel log buffer."""
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"""Print clk tree summary
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Output is a subset of /sys/kernel/debug/clk/clk_summary
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No calls are made during printing, instead a (c) if printed after values which
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are cached and potentially out of date"""
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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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gdb.write("%*s%-*s %7d %8d %8d %11lu%s\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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clk['protect_count'],
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clk['rate'],
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'(c)' if clk['flags'] & constants.LX_CLK_GET_RATE_NOCACHE else ' '))
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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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gdb.write(" enable prepare protect \n")
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gdb.write(" clock count count count rate \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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@ -12,6 +12,7 @@
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*
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*/
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#include <linux/clk-provider.h>
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#include <linux/fs.h>
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#include <linux/hrtimer.h>
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#include <linux/mount.h>
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@ -38,6 +39,9 @@
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import gdb
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/* linux/clk-provider.h */
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LX_GDBPARSED(CLK_GET_RATE_NOCACHE)
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/* linux/fs.h */
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LX_VALUE(SB_RDONLY)
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LX_VALUE(SB_SYNCHRONOUS)
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