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ARM: mx5/babbage: Use gpio_request_one in babbage_usbhub_reset

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Current code inside babbage_usbhub_reset uses gpio_direction_output with initial value of the GPIO and also sets
the GPIO value via gpio_set_value to the same level right after. This is not needed.

By using gpio_request_one it is possible to set the direction and initial value in one shot.

Signed-off-by: Fabio Estevam <fabio.estevam@freescale.com>
LAKML-Reference: 1300377359-23212-2-git-send-email-fabio.estevam@freescale.com
Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
This commit is contained in:
Fabio Estevam 2011-03-17 12:55:57 -03:00 committed by Sascha Hauer
parent 2d95378b04
commit 6f9ec442a0
1 changed files with 5 additions and 7 deletions
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12
arch/arm/mach-mx5/board-mx51_babbage.c
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@ -208,18 +208,16 @@ static inline void babbage_usbhub_reset(void)
{
int ret;
/* Bring USB hub out of reset */
ret = gpio_request(BABBAGE_USB_HUB_RESET, "GPIO1_7");
/* Reset USB hub */
ret = gpio_request_one(BABBAGE_USB_HUB_RESET,
GPIOF_OUT_INIT_LOW, "GPIO1_7");
if (ret) {
printk(KERN_ERR"failed to get GPIO_USB_HUB_RESET: %d\n", ret);
return;
}
gpio_direction_output(BABBAGE_USB_HUB_RESET, 0);
/* USB HUB RESET - De-assert USB HUB RESET_N */
msleep(1);
gpio_set_value(BABBAGE_USB_HUB_RESET, 0);
msleep(1);
msleep(2);
/* Deassert reset */
gpio_set_value(BABBAGE_USB_HUB_RESET, 1);
}