linux-kernel - [PATCH] mfd: Enable rbtree cache for wm831x devices

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Date:	Fri, 14 Oct 2011 21:06:26 +0100
From:	Mark Brown <broonie@...nsource.wolfsonmicro.com>
To:	Samuel Ortiz <sameo@...ux.intel.com>
Cc:	linux-kernel@...r.kernel.org, patches@...nsource.wolfsonmicro.com,
	Mark Brown <broonie@...nsource.wolfsonmicro.com>
Subject: [PATCH] mfd: Enable rbtree cache for wm831x devices

Most useful with the regulators where we're doing a lot of read/modify/write
updates in potentially performance critical paths.  Providing some defaults
would make this slightly better but this is a win right now.

Signed-off-by: Mark Brown <broonie@...nsource.wolfsonmicro.com>
---

Samuel, this depends on the regmap code in -next so I'd like to merge
it via regmap if that's OK with you?

 drivers/mfd/wm831x-core.c |    2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)

diff --git a/drivers/mfd/wm831x-core.c b/drivers/mfd/wm831x-core.c
index e758c89..0a2b8d4 100644
--- a/drivers/mfd/wm831x-core.c
+++ b/drivers/mfd/wm831x-core.c
@@ -1602,6 +1602,8 @@ struct regmap_config wm831x_regmap_config = {
 	.reg_bits = 16,
 	.val_bits = 16,
 
+	.cache_type = REGCACHE_RBTREE,
+
 	.max_register = WM831X_DBE_CHECK_DATA,
 	.readable_reg = wm831x_reg_readable,
 	.writeable_reg = wm831x_reg_writeable,
-- 
1.7.6.3

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