linux-kernel - [PATCH] mfd: wm8994: Cache chip revision

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Message-Id: <1333635416-3905-1-git-send-email-broonie@opensource.wolfsonmicro.com>
Date:	Thu,  5 Apr 2012 15:16:56 +0100
From:	Mark Brown <broonie@...nsource.wolfsonmicro.com>
To:	Samuel Ortiz <sameo@...ux.intel.com>
Cc:	patches@...nsource.wolfsonmicro.com, linux-kernel@...r.kernel.org,
	Mark Brown <broonie@...nsource.wolfsonmicro.com>
Subject: [PATCH] mfd: wm8994: Cache chip revision

There's no need to mark the chip revision registers as volatile, it won't
change at runtime so we can cache it from the device at startup.

Signed-off-by: Mark Brown <broonie@...nsource.wolfsonmicro.com>
---
 drivers/mfd/wm8994-regmap.c |    1 -
 1 files changed, 0 insertions(+), 1 deletions(-)

diff --git a/drivers/mfd/wm8994-regmap.c b/drivers/mfd/wm8994-regmap.c
index bfd25af..52e9e29 100644
--- a/drivers/mfd/wm8994-regmap.c
+++ b/drivers/mfd/wm8994-regmap.c
@@ -1122,7 +1122,6 @@ static bool wm8994_volatile_register(struct device *dev, unsigned int reg)
 	case WM8994_RATE_STATUS:
 	case WM8958_MIC_DETECT_3:
 	case WM8994_DC_SERVO_4E:
-	case WM8994_CHIP_REVISION:
 	case WM8994_INTERRUPT_STATUS_1:
 	case WM8994_INTERRUPT_STATUS_2:
 		return true;
-- 
1.7.9.1

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