linux-kernel - [PATCH 2/3] ti-st: st_kim: fix nshutdown_gpio in get_platform

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Message-Id: <1435141446-27236-2-git-send-email-j@bitron.ch>
Date:	Wed, 24 Jun 2015 12:24:05 +0200
From:	Jürg Billeter <j@...ron.ch>
To:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc:	Gigi Joseph <gigi.joseph@...il.com>,
	Colin Ian King <colin.king@...onical.com>,
	linux-kernel@...r.kernel.org,
	Jürg Billeter <j@...ron.ch>
Subject: [PATCH 2/3] ti-st: st_kim: fix nshutdown_gpio in get_platform_data

Use of_get_named_gpio instead of of_property_read_u32.

Signed-off-by: Jürg Billeter <j@...ron.ch>
---
 drivers/misc/ti-st/st_kim.c | 13 ++++++++++---
 1 file changed, 10 insertions(+), 3 deletions(-)

diff --git a/drivers/misc/ti-st/st_kim.c b/drivers/misc/ti-st/st_kim.c
index af71584..8df8faa 100644
--- a/drivers/misc/ti-st/st_kim.c
+++ b/drivers/misc/ti-st/st_kim.c
@@ -38,6 +38,7 @@
 #include <linux/module.h>
 #include <linux/of.h>
 #include <linux/of_device.h>
+#include <linux/of_gpio.h>
 
 #define MAX_ST_DEVICES	3	/* Imagine 1 on each UART for now */
 static struct platform_device *st_kim_devices[MAX_ST_DEVICES];
@@ -749,7 +750,7 @@ static struct ti_st_plat_data *get_platform_data(struct device *dev)
 {
 	struct device_node *np = dev->of_node;
 	const u32 *dt_property;
-	int len;
+	int len, gpio;
 
 	dt_pdata = kzalloc(sizeof(*dt_pdata), GFP_KERNEL);
 
@@ -761,8 +762,14 @@ static struct ti_st_plat_data *get_platform_data(struct device *dev)
 	dt_property = of_get_property(np, "dev_name", &len);
 	if (dt_property)
 		memcpy(&dt_pdata->dev_name, dt_property, len);
-	of_property_read_u32(np, "nshutdown_gpio",
-			     &dt_pdata->nshutdown_gpio);
+
+	gpio = of_get_named_gpio(np, "nshutdown_gpio", 0);
+	if (gpio < 0) {
+		kfree(dt_pdata);
+		return ERR_PTR(gpio);
+	}
+	dt_pdata->nshutdown_gpio = gpio;
+
 	of_property_read_u32(np, "flow_cntrl", &dt_pdata->flow_cntrl);
 	of_property_read_u32(np, "baud_rate", &dt_pdata->baud_rate);
 
-- 
2.4.3

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