The maple tree register cache is based on a much more modern data structure than the rbtree cache and makes optimisation choices which are probably more appropriate for modern systems than those made by the rbtree cache. Signed-off-by: Mark Brown <broonie@xxxxxxxxxx> --- drivers/gpio/gpio-pca953x.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/gpio/gpio-pca953x.c b/drivers/gpio/gpio-pca953x.c index bdd50a78e414..528ccb59b52a 100644 --- a/drivers/gpio/gpio-pca953x.c +++ b/drivers/gpio/gpio-pca953x.c @@ -414,7 +414,7 @@ static const struct regmap_config pca953x_i2c_regmap = { .volatile_reg = pca953x_volatile_register, .disable_locking = true, - .cache_type = REGCACHE_RBTREE, + .cache_type = REGCACHE_MAPLE, .max_register = 0x7f, }; @@ -430,7 +430,7 @@ static const struct regmap_config pca953x_ai_i2c_regmap = { .volatile_reg = pca953x_volatile_register, .disable_locking = true, - .cache_type = REGCACHE_RBTREE, + .cache_type = REGCACHE_MAPLE, .max_register = 0x7f, }; --- base-commit: 6465e260f48790807eef06b583b38ca9789b6072 change-id: 20230929-gpio-pca953x-maple-b39b99cd90db Best regards, -- Mark Brown <broonie@xxxxxxxxxx>