[PATCH] regcache: Demote defaults readback from HW to debug print

[Marek Vasut]

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@xxxxxxxxxxxxxx>
Signed-off-by: Marek Vasut <marek.vasut+renesas@xxxxxxxxxxx>
---
Cc: "Rafael J. Wysocki" <rafael@xxxxxxxxxx>
Cc: Danilo Krummrich <dakr@xxxxxxxxxx>
Cc: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
Cc: Mark Brown <broonie@xxxxxxxxxx>
Cc: linux-kernel@xxxxxxxxxxxxxxx
Cc: linux-renesas-soc@xxxxxxxxxxxxxxx
---
 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