linux-kernel - [PATCH 3/5] mfd: arizona: Factor out hard reset into helper functions

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Message-Id: <1427209192-12795-4-git-send-email-ckeepax@opensource.wolfsonmicro.com>
Date:	Tue, 24 Mar 2015 14:59:50 +0000
From:	Charles Keepax <ckeepax@...nsource.wolfsonmicro.com>
To:	lee.jones@...aro.org
Cc:	sameo@...ux.intel.com, broonie@...nel.org,
	patches@...nsource.wolfsonmicro.com, linux-kernel@...r.kernel.org
Subject: [PATCH 3/5] mfd: arizona: Factor out hard reset into helper functions

This patch adds functions for enabling and disabling the physical reset
line. This will be helpful in future refactoring.

Signed-off-by: Charles Keepax <ckeepax@...nsource.wolfsonmicro.com>
---
 drivers/mfd/arizona-core.c |   29 +++++++++++++++++++----------
 1 files changed, 19 insertions(+), 10 deletions(-)

diff --git a/drivers/mfd/arizona-core.c b/drivers/mfd/arizona-core.c
index aaaecaa..181da79 100644
--- a/drivers/mfd/arizona-core.c
+++ b/drivers/mfd/arizona-core.c
@@ -267,6 +267,20 @@ static int arizona_wait_for_boot(struct arizona *arizona)
 	return ret;
 }
 
+static inline void arizona_enable_reset(struct arizona *arizona)
+{
+	if (arizona->pdata.reset)
+		gpio_set_value_cansleep(arizona->pdata.reset, 0);
+}
+
+static void arizona_disable_reset(struct arizona *arizona)
+{
+	if (arizona->pdata.reset) {
+		gpio_set_value_cansleep(arizona->pdata.reset, 1);
+		msleep(1);
+	}
+}
+
 struct arizona_sysclk_state {
 	unsigned int fll;
 	unsigned int sysclk;
@@ -888,10 +902,7 @@ int arizona_dev_init(struct arizona *arizona)
 		goto err_enable;
 	}
 
-	if (arizona->pdata.reset) {
-		gpio_set_value_cansleep(arizona->pdata.reset, 1);
-		msleep(1);
-	}
+	arizona_disable_reset(arizona);
 
 	regcache_cache_only(arizona->regmap, false);
 
@@ -1187,10 +1198,9 @@ int arizona_dev_init(struct arizona *arizona)
 err_irq:
 	arizona_irq_exit(arizona);
 err_reset:
-	if (arizona->pdata.reset) {
-		gpio_set_value_cansleep(arizona->pdata.reset, 0);
+	arizona_enable_reset(arizona);
+	if (arizona->pdata.reset)
 		gpio_free(arizona->pdata.reset);
-	}
 	regulator_disable(arizona->dcvdd);
 err_enable:
 	regulator_bulk_disable(arizona->num_core_supplies,
@@ -1215,10 +1225,9 @@ int arizona_dev_exit(struct arizona *arizona)
 	arizona_free_irq(arizona, ARIZONA_IRQ_OVERCLOCKED, arizona);
 	arizona_free_irq(arizona, ARIZONA_IRQ_CLKGEN_ERR, arizona);
 	arizona_irq_exit(arizona);
-	if (arizona->pdata.reset) {
-		gpio_set_value_cansleep(arizona->pdata.reset, 0);
+	arizona_enable_reset(arizona);
+	if (arizona->pdata.reset)
 		gpio_free(arizona->pdata.reset);
-	}
 
 	regulator_bulk_disable(arizona->num_core_supplies,
 			       arizona->core_supplies);
-- 
1.7.2.5

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