linux-kernel - [PATCH v2 1/9] mfd: arizona: Use devres to manage reset GPIO

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Date:	Fri, 17 Apr 2015 09:42:18 +0100
From:	Charles Keepax <ckeepax@...nsource.wolfsonmicro.com>
To:	lee.jones@...aro.org
Cc:	broonie@...nel.org, sameo@...ux.intel.com,
	linux-kernel@...r.kernel.org, lgirdwood@...il.com,
	patches@...nsource.wolfsonmicro.com
Subject: [PATCH v2 1/9] mfd: arizona: Use devres to manage reset GPIO

This also handily fixes a leak of the GPIO in arizona_dev_exit.

Signed-off-by: Charles Keepax <ckeepax@...nsource.wolfsonmicro.com>
---
 drivers/mfd/arizona-core.c |   10 ++++------
 1 files changed, 4 insertions(+), 6 deletions(-)

diff --git a/drivers/mfd/arizona-core.c b/drivers/mfd/arizona-core.c
index 6ca6dfa..be8b1a4 100644
--- a/drivers/mfd/arizona-core.c
+++ b/drivers/mfd/arizona-core.c
@@ -728,9 +728,9 @@ int arizona_dev_init(struct arizona *arizona)
 
 	if (arizona->pdata.reset) {
 		/* Start out with /RESET low to put the chip into reset */
-		ret = gpio_request_one(arizona->pdata.reset,
-				       GPIOF_DIR_OUT | GPIOF_INIT_LOW,
-				       "arizona /RESET");
+		ret = devm_gpio_request_one(arizona->dev, arizona->pdata.reset,
+					    GPIOF_DIR_OUT | GPIOF_INIT_LOW,
+					    "arizona /RESET");
 		if (ret != 0) {
 			dev_err(dev, "Failed to request /RESET: %d\n", ret);
 			goto err_dcvdd;
@@ -1054,10 +1054,8 @@ int arizona_dev_init(struct arizona *arizona)
 err_irq:
 	arizona_irq_exit(arizona);
 err_reset:
-	if (arizona->pdata.reset) {
+	if (arizona->pdata.reset)
 		gpio_set_value_cansleep(arizona->pdata.reset, 0);
-		gpio_free(arizona->pdata.reset);
-	}
 	regulator_disable(arizona->dcvdd);
 err_enable:
 	regulator_bulk_disable(arizona->num_core_supplies,
-- 
1.7.2.5

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