[PATCH 5.4 158/344] clk: actually call the clock init before any other callback of the clock

Greg Kroah-Hartman
2020-02-21T08:08:05Z

From: Jerome Brunet <jbrunet@baylibre.com>

[ Upstream commit f6fa75ca912be6021335de63a32aa4d295f3c524 ]

__clk_init_parent() will call the .get_parent() callback of the clock
so .init() must run before.

Fixes: 541debae0adf ("clk: call the clock init() callback before any other ops callback")
Signed-off-by: Jerome Brunet <jbrunet@baylibre.com>
Link: https://lkml.kernel.org/r/20190924123954.31561-2-jbrunet@baylibre.com
Signed-off-by: Stephen Boyd <sboyd@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/clk/clk.c | 26 +++++++++++++++-----------
1 file changed, 15 insertions(+), 11 deletions(-)

diff --git a/drivers/clk/clk.c b/drivers/clk/clk.c
index 67f592fa083ab..b0344a1a03704 100644
--- a/drivers/clk/clk.c
+++ b/drivers/clk/clk.c
@@ -3320,6 +3320,21 @@ static int __clk_core_init(struct clk_core *core)
goto out;
}

+ /*
+ * optional platform-specific magic
+ *
+ * The .init callback is not used by any of the basic clock types, but
+ * exists for weird hardware that must perform initialization magic.
+ * Please consider other ways of solving initialization problems before
+ * using this callback, as its use is discouraged.
+ *
+ * If it exist, this callback should called before any other callback of
+ * the clock
+ */
+ if (core->ops->init)
+ core->ops->init(core->hw);
+
+
core->parent = __clk_init_parent(core);

/*
@@ -3344,17 +3359,6 @@ static int __clk_core_init(struct clk_core *core)
core->orphan = true;
}

- /*
- * optional platform-specific magic
- *
- * The .init callback is not used by any of the basic clock types, but
- * exists for weird hardware that must perform initialization magic.
- * Please consider other ways of solving initialization problems before
- * using this callback, as its use is discouraged.
- */
- if (core->ops->init)
- core->ops->init(core->hw);
-
/*
* Set clk's accuracy. The preferred method is to use
* .recalc_accuracy. For simple clocks and lazy developers the default
--
2.20.1