linux-kernel - [PATCH 08/09] ARM: s3c2440: gta02: Request usb pullup pin before using it

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Date:	Mon,  7 Feb 2011 02:52:00 +0100
From:	Lars-Peter Clausen <lars@...afoo.de>
To:	Ben Dooks <ben-linux@...ff.org>, Kukjin Kim <kgene.kim@...sung.com>
Cc:	linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
	Lars-Peter Clausen <lars@...afoo.de>
Subject: [PATCH 08/09] ARM: s3c2440: gta02: Request usb pullup pin before using it

Request the gpio pin used to control the usb pullup before using it to avoid a
runtime warning about an auto-requested gpio.

Signed-off-by: Lars-Peter Clausen <lars@...afoo.de>
---
 arch/arm/mach-s3c2440/mach-gta02.c |   17 +++++++++++++++--
 1 files changed, 15 insertions(+), 2 deletions(-)

diff --git a/arch/arm/mach-s3c2440/mach-gta02.c b/arch/arm/mach-s3c2440/mach-gta02.c
index 1396639..94456fa 100644
--- a/arch/arm/mach-s3c2440/mach-gta02.c
+++ b/arch/arm/mach-s3c2440/mach-gta02.c
@@ -451,11 +451,11 @@ static void gta02_udc_command(enum s3c2410_udc_cmd_e cmd)
 	switch (cmd) {
 	case S3C2410_UDC_P_ENABLE:
 		pr_debug("%s S3C2410_UDC_P_ENABLE\n", __func__);
-		gpio_direction_output(GTA02_GPIO_USB_PULLUP, 1);
+		gpio_set_value(GTA02_GPIO_USB_PULLUP, 1);
 		break;
 	case S3C2410_UDC_P_DISABLE:
 		pr_debug("%s S3C2410_UDC_P_DISABLE\n", __func__);
-		gpio_direction_output(GTA02_GPIO_USB_PULLUP, 0);
+		gpio_set_value(GTA02_GPIO_USB_PULLUP, 0);
 		break;
 	case S3C2410_UDC_P_RESET:
 		pr_debug("%s S3C2410_UDC_P_RESET\n", __func__);
@@ -572,11 +572,24 @@ static void gta02_poweroff(void)
 	pcf50633_reg_set_bit_mask(gta02_pcf, PCF50633_REG_OOCSHDWN, 1, 1);
 }
 
+static void gta02_request_gpios(void)
+{
+	int ret;
+	ret = gpio_request_one(GTA02_GPIO_USB_PULLUP, GPIOF_OUT_INIT_LOW,
+				"USB pullup");
+	if (ret) {
+		printk(KERN_ERR "Failed to request USB pullup gpio pin: %d\n",
+			ret);
+	}
+}
+
 static void __init gta02_machine_init(void)
 {
 	/* Set the panic callback to turn AUX LED on or off. */
 	panic_blink = gta02_panic_blink;
 
+	gta02_request_gpios();
+
 	s3c_pm_init();
 
 #ifdef CONFIG_CHARGER_PCF50633
-- 
1.7.2.3

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