From 7ef47a12a62e8fcf1b66a401cd6f3fc055581da0 Mon Sep 17 00:00:00 2001 From: Mark Brown Date: Tue, 25 Apr 2023 19:03:33 +0100 Subject: [PATCH] mfd: wm831x: Use maple tree register cache regmap has introduced a maple tree based register cache which makes use of this more advanced data structure which has been added to the kernel recently. Maple trees are much flatter than rbtrees, meaning that they do not grow to such depths when the register map is sparse which makes access a bit more efficient. The maple tree cache type is still a bit of a work in progress but should be effective for some devices already. The wm831x devices have a pretty sparse register map and being always on devices never do cache syncs so don't hit the major current disadvantage so they should be good candiates for using the maple tree cache. Update to do so, there should be little if any visible difference at runtime. Signed-off-by: Mark Brown Reviewed-by: Charles Keepax Signed-off-by: Lee Jones Link: https://lore.kernel.org/r/20230419-mfd-wm831x-maple-v1-1-e03e39d7bb0b@kernel.org --- drivers/mfd/wm831x-core.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/mfd/wm831x-core.c b/drivers/mfd/wm831x-core.c index d2f444d2ae78f..e86b6a4896a68 100644 --- a/drivers/mfd/wm831x-core.c +++ b/drivers/mfd/wm831x-core.c @@ -1430,7 +1430,7 @@ struct regmap_config wm831x_regmap_config = { .reg_bits = 16, .val_bits = 16, - .cache_type = REGCACHE_RBTREE, + .cache_type = REGCACHE_MAPLE, .max_register = WM831X_DBE_CHECK_DATA, .readable_reg = wm831x_reg_readable, -- 2.30.2