linux-kernel - [PATCH 4/4] pinctrl: at91: Add remove function in platform_driver at91_gpio

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Date:	Sun, 31 Aug 2014 16:51:55 +0530
From:	Pramod Gurav <pramod.gurav@...rtplayin.com>
To:	linux-kernel@...r.kernel.org
Cc:	Jean-Christophe Plagniol-Villard <plagnioj@...osoft.com>,
	Linus Walleij <linus.walleij@...aro.org>
Subject: [PATCH 4/4] pinctrl: at91: Add remove function in platform_driver at91_gpio_driver

This adds remove function in at91_gpio_driver platform_driver so that
driver can be unloaded cleanly.

CC: Jean-Christophe Plagniol-Villard <plagnioj@...osoft.com>
CC: Linus Walleij <linus.walleij@...aro.org>
Signed-off-by: Pramod Gurav <pramod.gurav@...rtplayin.com>
---
 drivers/pinctrl/pinctrl-at91.c |   13 +++++++++++++
 1 files changed, 13 insertions(+), 0 deletions(-)

diff --git a/drivers/pinctrl/pinctrl-at91.c b/drivers/pinctrl/pinctrl-at91.c
index 8b8772c..92641b6 100644
--- a/drivers/pinctrl/pinctrl-at91.c
+++ b/drivers/pinctrl/pinctrl-at91.c
@@ -1646,6 +1646,7 @@ static int at91_gpio_probe(struct platform_device *pdev)
 	if (ret)
 		goto irq_setup_err;
 
+	platform_set_drvdata(pdev, at91_chip);
 	dev_info(&pdev->dev, "at address %p\n", at91_chip->regbase);
 
 	return 0;
@@ -1663,6 +1664,17 @@ err:
 	return ret;
 }
 
+static int at91_gpio_remove(struct platform_device *pdev)
+{
+	struct at91_gpio_chip *at91_chip = platform_get_drvdata(pdev);
+
+	gpiochip_remove(&at91_chip->chip);
+	clk_disable(at91_chip->clock);
+	clk_unprepare(at91_chip->clock);
+
+	return 0;
+}
+
 static struct platform_driver at91_gpio_driver = {
 	.driver = {
 		.name = "gpio-at91",
@@ -1670,6 +1682,7 @@ static struct platform_driver at91_gpio_driver = {
 		.of_match_table = at91_gpio_of_match,
 	},
 	.probe = at91_gpio_probe,
+	.remove = at91_gpio_remove,
 };
 
 static struct platform_driver at91_pinctrl_driver = {
-- 
1.7.0.4

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