diff options
| author |   Fabio Estevam <fabio.estevam@freescale.com> | 2011-03-17 12:55:57 -0300 |
|---|---|---|
| committer |   Sascha Hauer <s.hauer@pengutronix.de> | 2011-05-19 13:11:04 +0200 |
| commit | 6f9ec442a07701e0ef241854862fdf2540be1bdb (patch) | |
| tree | cc291be07bd36c1fd086ec2940078c89356fe001 /arch/arm/mach-mx5 | |
| parent | ARM: mx53: Print silicon revision on boot (diff) | |
| download | linux-dev-6f9ec442a07701e0ef241854862fdf2540be1bdb.tar.xz linux-dev-6f9ec442a07701e0ef241854862fdf2540be1bdb.zip | |
ARM: mx5/babbage: Use gpio_request_one in babbage_usbhub_reset
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>
Diffstat (limited to 'arch/arm/mach-mx5')
| -rw-r--r-- | arch/arm/mach-mx5/board-mx51_babbage.c | 12 |
1 files changed, 5 insertions, 7 deletions
diff --git a/arch/arm/mach-mx5/board-mx51_babbage.c b/arch/arm/mach-mx5/board-mx51_babbage.c index bea4e4135f9d..ab50aa9d268c 100644 --- a/arch/arm/mach-mx5/board-mx51_babbage.c +++ b/arch/arm/mach-mx5/board-mx51_babbage.c @@ -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); } |