linux-kernel - [PATCH] mfd: arizona: Remove redundant register sync

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Message-Id: <1424188574-22876-1-git-send-email-ckeepax@opensource.wolfsonmicro.com>
Date:	Tue, 17 Feb 2015 15:56:14 +0000
From:	Charles Keepax <ckeepax@...nsource.wolfsonmicro.com>
To:	lee.jones@...aro.org
Cc:	sameo@...ux.intel.com, patches@...nsource.wolfsonmicro.com,
	linux-kernel@...r.kernel.org
Subject: [PATCH] mfd: arizona: Remove redundant register sync

This soft reset used to be located after the register patch had been
applied, but has since moved to before the patch is applied. At the new
location there is no requirement to do a register sync as no register
writes will have happened yet.

Signed-off-by: Charles Keepax <ckeepax@...nsource.wolfsonmicro.com>
---
 drivers/mfd/arizona-core.c |    8 --------
 1 files changed, 0 insertions(+), 8 deletions(-)

diff --git a/drivers/mfd/arizona-core.c b/drivers/mfd/arizona-core.c
index 09ba8f1..4d0591c 100644
--- a/drivers/mfd/arizona-core.c
+++ b/drivers/mfd/arizona-core.c
@@ -765,8 +765,6 @@ int arizona_dev_init(struct arizona *arizona)
 
 	/* If we have a /RESET GPIO we'll already be reset */
 	if (!arizona->pdata.reset) {
-		regcache_mark_dirty(arizona->regmap);
-
 		ret = regmap_write(arizona->regmap, ARIZONA_SOFTWARE_RESET, 0);
 		if (ret != 0) {
 			dev_err(dev, "Failed to reset device: %d\n", ret);
@@ -774,12 +772,6 @@ int arizona_dev_init(struct arizona *arizona)
 		}
 
 		msleep(1);
-
-		ret = regcache_sync(arizona->regmap);
-		if (ret != 0) {
-			dev_err(dev, "Failed to sync device: %d\n", ret);
-			goto err_reset;
-		}
 	}
 
 	/* Ensure device startup is complete */
-- 
1.7.2.5

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