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>
---
Cc: "Rafael J. Wysocki" <rafael@kernel.org>
Cc: Danilo Krummrich <dakr@kernel.org>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Mark Brown <broonie@kernel.org>
Cc: linux-kernel@vger.kernel.org
Cc: linux-renesas-soc@vger.kernel.org
---
 drivers/base/regmap/regcache.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/base/regmap/regcache.c b/drivers/base/regmap/regcache.c
index 319c342bf5a06..a4e8983a5c6f7 100644
--- 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;
-- 
2.51.0

On Thu, 22 Jan 2026 00:42:58 +0100, Marek Vasut wrote:
> 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.
> 
> [...]

Applied to

   https://git.kernel.org/pub/scm/linux/kernel/git/broonie/regmap.git for-next

Thanks!

[1/1] regcache: Demote defaults readback from HW to debug print
      commit: 6ffdc7eb48bd2268c37c2accad454c043b9cc987

All being well this means that it will be integrated into the linux-next
tree (usually sometime in the next 24 hours) and sent to Linus during
the next merge window (or sooner if it is a bug fix), however if
problems are discovered then the patch may be dropped or reverted.

You may get further e-mails resulting from automated or manual testing
and review of the tree, please engage with people reporting problems and
send followup patches addressing any issues that are reported if needed.

If any updates are required or you are submitting further changes they
should be sent as incremental updates against current git, existing
patches will not be replaced.

Please add any relevant lists and maintainers to the CCs when replying
to this mail.

Thanks,
Mark