[PATCH 04/13] clk: print debug message if parent change is ignored
From: Benjamin Bara <hidden>
Date: 2023-09-17 22:41:27
Also in:
linux-clk, linux-devicetree, lkml
Subsystem:
common clk framework, the rest · Maintainers:
Michael Turquette, Stephen Boyd, Linus Torvalds
From: Benjamin Bara <redacted> Print a debug message if the determination of the best clock rate suggests a re-config of the parent (which means the actual driver considers doing so), but the clock is not configured with CLK_SET_PARENT_RATE. This should give a good hint for clock config improvement potential. Signed-off-by: Benjamin Bara <redacted> --- drivers/clk/clk.c | 11 ++++++++--- 1 file changed, 8 insertions(+), 3 deletions(-)
diff --git a/drivers/clk/clk.c b/drivers/clk/clk.c
index 3e222802b712..4954d31899ce 100644
--- a/drivers/clk/clk.c
+++ b/drivers/clk/clk.c@@ -2241,9 +2241,14 @@ static struct clk_core *clk_calc_new_rates(struct clk_core *core, } } - if ((core->flags & CLK_SET_RATE_PARENT) && parent && - best_parent_rate != parent->rate) - top = clk_calc_new_rates(parent, best_parent_rate); + if (parent && best_parent_rate != parent->rate) { + if (core->flags & CLK_SET_RATE_PARENT) + top = clk_calc_new_rates(parent, best_parent_rate); + else + pr_debug("%s: ignore parent %s re-config from %lu to %lu\n", + core->name, parent->name, parent->rate, + best_parent_rate); + } out: clk_calc_subtree(core, new_rate, parent, p_index);
--
2.34.1
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