linux-kernel - [PATCH v2] mfd: wcd934x: Update to use maple tree register cache

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Message-Id: <20230912-mfd-wcd934x-maple-v2-1-292a154113e3@kernel.org>
Date:   Tue, 12 Sep 2023 12:36:46 +0100
From:   Mark Brown <broonie@...nel.org>
To:     Lee Jones <lee@...nel.org>
Cc:     Srinivas Kandagatla <srinivas.kandagatla@...aro.org>,
        linux-kernel@...r.kernel.org, Mark Brown <broonie@...nel.org>
Subject: [PATCH v2] mfd: wcd934x: Update to use maple tree register cache

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. In
v6.5 it has also acquired the ability to generate multi-register writes in
sync operations, bringing performance up to parity with the rbtree cache
there.

Update the wcd934x to use the more modern data structure.

Signed-off-by: Mark Brown <broonie@...nel.org>
---


Signed-off-by: Mark
---
Changes in v2:
- Rebase onto v6.6-rc1.
- Link to v1: https://lore.kernel.org/r/20230712-mfd-wcd934x-maple-v1-1-0d7aba4b0077@kernel.org
---
 drivers/mfd/wcd934x.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/mfd/wcd934x.c b/drivers/mfd/wcd934x.c
index 6b942d5270c1..7b9873b72c37 100644
--- a/drivers/mfd/wcd934x.c
+++ b/drivers/mfd/wcd934x.c
@@ -112,7 +112,7 @@ static const struct regmap_range_cfg wcd934x_ranges[] = {
 static struct regmap_config wcd934x_regmap_config = {
 	.reg_bits = 16,
 	.val_bits = 8,
-	.cache_type = REGCACHE_RBTREE,
+	.cache_type = REGCACHE_MAPLE,
 	.max_register = 0xffff,
 	.can_multi_write = true,
 	.ranges = wcd934x_ranges,

---
base-commit: 0bb80ecc33a8fb5a682236443c1e740d5c917d1d
change-id: 20230623-mfd-wcd934x-maple-852535e3b2c6

Best regards,
-- 
Mark Brown <broonie@...nel.org>