linux-kernel - [PATCH 3/3] scripts/gdb: Add $lx_clk_core

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Message-ID: <ebda22b2d3f7e35db5809bf21f4f9ee3ac38f5d9.1555921081.git.leonard.crestez@nxp.com>
Date:   Mon, 22 Apr 2019 08:26:57 +0000
From:   Leonard Crestez <leonard.crestez@....com>
To:     Stephen Boyd <sboyd@...nel.org>,
        Jan Kiszka <jan.kiszka@...mens.com>,
        Kieran Bingham <kbingham@...nel.org>
CC:     Andrew Morton <akpm@...ux-foundation.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: [PATCH 3/3] scripts/gdb: Add $lx_clk_core_lookup function

Finding an individual clk_core requires walking the tree which can be
quite complicated so add a helper for easy access.

(gdb) print *(struct clk_scu*)$lx_clk_core_lookup("uart0_clk")->hw

Signed-off-by: Leonard Crestez <leonard.crestez@....com>
---
 scripts/gdb/linux/clk.py | 23 +++++++++++++++++++++++
 1 file changed, 23 insertions(+)

diff --git a/scripts/gdb/linux/clk.py b/scripts/gdb/linux/clk.py
index a9129d865c5d..6bf71976b55d 100644
--- a/scripts/gdb/linux/clk.py
+++ b/scripts/gdb/linux/clk.py
@@ -42,5 +42,28 @@ class LxClkSummary(gdb.Command):
         for clk in clk_core_for_each_child(gdb.parse_and_eval("clk_orphan_list")):
             self.show_subtree(clk, 0)
 
 
 LxClkSummary()
+
+
+class LxClkCoreLookup(gdb.Function):
+    """Find struct clk_core by name"""
+
+    def __init__(self):
+        super(LxClkCoreLookup, self).__init__("lx_clk_core_lookup")
+
+    def lookup_hlist(self, hlist_head, name):
+        for child in clk_core_for_each_child(hlist_head):
+            if child['name'].string() == name:
+                return child
+            result = self.lookup_hlist(child['children'], name)
+            if result:
+                return result
+
+    def invoke(self, name):
+        name = name.string()
+        return (self.lookup_hlist(gdb.parse_and_eval("clk_root_list"), name) or
+                self.lookup_hlist(gdb.parse_and_eval("clk_orphan_list"), name))
+
+
+LxClkCoreLookup()
-- 
2.17.1