linux-kernel - [PATCH lora-next 11/11] net: lora: sx130x: Enable regmap caching

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Date:   Sun,  6 Jan 2019 09:37:54 +0100
From:   Andreas Färber <afaerber@...e.de>
To:     linux-lpwan@...ts.infradead.org
Cc:     netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
        Andreas Färber <afaerber@...e.de>,
        Ben Whitten <ben.whitten@...il.com>,
        "David S. Miller" <davem@...emloft.net>
Subject: [PATCH lora-next 11/11] net: lora: sx130x: Enable regmap caching

To fix performance penalties compared to pre-regmap field code,
enable caching.

Note: This has been tested to not regress on spi-gpio, with no
improvement on spi-sun6i for clk_prepare() locking issue.

Cc: Ben Whitten <ben.whitten@...il.com>
Signed-off-by: Andreas Färber <afaerber@...e.de>
---
 drivers/net/lora/sx130x.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/net/lora/sx130x.c b/drivers/net/lora/sx130x.c
index 76ce072a540a..2fb18d0c9db5 100644
--- a/drivers/net/lora/sx130x.c
+++ b/drivers/net/lora/sx130x.c
@@ -162,7 +162,7 @@ const struct regmap_config sx130x_regmap_config = {
 	.reg_bits = 8,
 	.val_bits = 8,
 
-	.cache_type = REGCACHE_NONE,
+	.cache_type = REGCACHE_RBTREE,
 	.disable_locking = true,
 
 	.read_flag_mask = 0,
-- 
2.16.4