linux-kernel - [PATCH] net: dsa: ar9331: Use maple tree register cache

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Message-Id: <20230713-net-ar9331-regmap-maple-v1-1-bffed9f09da7@kernel.org>
Date:   Thu, 13 Jul 2023 00:45:58 +0100
From:   Mark Brown <broonie@...nel.org>
To:     Andrew Lunn <andrew@...n.ch>,
        Florian Fainelli <f.fainelli@...il.com>,
        Vladimir Oltean <olteanv@...il.com>,
        "David S. Miller" <davem@...emloft.net>,
        Eric Dumazet <edumazet@...gle.com>,
        Jakub Kicinski <kuba@...nel.org>,
        Paolo Abeni <pabeni@...hat.com>
Cc:     netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
        Mark Brown <broonie@...nel.org>
Subject: [PATCH] net: dsa: ar9331: Use maple tree register cache

We now have a regmap cache which uses a maple tree to store the register
state, this is a more modern data structure and the regmap level code
using it makes a number of assumptions better tuned for modern hardware
than those made by the rbtree cache type that the at9331 driver uses.
Switch the ar9331 driver to use the more modern data structure.

This should have minimal practical impact, it's mainly code
modernisation.

Signed-off-by: Mark Brown <broonie@...nel.org>
---
 drivers/net/dsa/qca/ar9331.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/net/dsa/qca/ar9331.c b/drivers/net/dsa/qca/ar9331.c
index b2bf78ac485e..72730dcc9ca9 100644
--- a/drivers/net/dsa/qca/ar9331.c
+++ b/drivers/net/dsa/qca/ar9331.c
@@ -1010,7 +1010,7 @@ static const struct regmap_config ar9331_mdio_regmap_config = {
 	.wr_table = &ar9331_register_set,
 	.rd_table = &ar9331_register_set,
 
-	.cache_type = REGCACHE_RBTREE,
+	.cache_type = REGCACHE_MAPLE,
 };
 
 static struct regmap_bus ar9331_sw_bus = {

---
base-commit: 06c2afb862f9da8dc5efa4b6076a0e48c3fbaaa5
change-id: 20230708-net-ar9331-regmap-maple-949f614c2599

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