regcache: Demote defaults readback from HW to debug print

Since commit 632e04739c8f ("clk: rs9: Fix suspend/resume"), the
clk-renesas-pcie-9series driver produces the following print in
kernel log on boot:
"
clk-renesas-pcie-9series 8-0068: No cache defaults, reading back from HW
"
This is caused by the presence of .num_reg_defaults_raw in its struct
regmap_config, without a matching .reg_defaults_raw table of built-in
register default values.

This configuration is valid, and causes the regcache code to read the
default register settings from the hardware, which is a valid behavior
for this particular chip. In fact, this configuration is more common
than configuration with .reg_defaults_raw built-in register defaults.

Do not warn about the read of default values being read from hardware,
as that is too strong and seems unnecessary, turn the warning into a
debug print.

Suggested-by: Geert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: Marek Vasut <marek.vasut+renesas@mailbox.org>
Link: https://patch.msgid.link/20260121234309.178391-1-marek.vasut+renesas@mailbox.org
Signed-off-by: Mark Brown <broonie@kernel.org>

diff --git a/drivers/base/regmap/regcache.c b/drivers/base/regmap/regcache.c
index 319c342bf5a064b1a5069ff83b602bb262fbb8d4..a4e8983a5c6f746a99549b885af401cebac51b2c 100644 (file)
--- a/drivers/base/regmap/regcache.c
+++ b/drivers/base/regmap/regcache.c
@@ -73,7 +73,7 @@ static int regcache_hw_init(struct regmap *map)
 
        if (!map->reg_defaults_raw) {
                bool cache_bypass = map->cache_bypass;
-               dev_warn(map->dev, "No cache defaults, reading back from HW\n");
+               dev_dbg(map->dev, "No cache defaults, reading back from HW\n");
 
                /* Bypass the cache access till data read from HW */
                map->cache_bypass = true;