diff mbox series

[04/13] clk: print debug message if parent change is ignored

Message ID 20230918-imx8mp-dtsi-v1-4-1d008b3237c0@skidata.com (mailing list archive)
State New, archived
Headers show
Series imx8mp: first clock propagation attempt (for LVDS) | expand

Commit Message

Benjamin Bara Sept. 17, 2023, 10:40 p.m. UTC 
From: Benjamin Bara <benjamin.bara@skidata.com>

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 <benjamin.bara@skidata.com>
---
 drivers/clk/clk.c | 11 ++++++++---
 1 file changed, 8 insertions(+), 3 deletions(-)
diff mbox series

Patch

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);