On Tue, Mar 04, 2014 at 11:05:58PM +0000, Marc Murphy wrote: > > -----Original Message----- > > From: Felipe Balbi [mailto:balbi@xxxxxx] > > Sent: 04 March 2014 22:44 > > To: Marc Murphy > > Cc: 'Igor Grinberg'; Roger Quadros; linux-omap@xxxxxxxxxxxxxxx > > Subject: Re: Help needed USB hub disconnected at resume > > > > Hi, > > > > On Tue, Mar 04, 2014 at 10:34:56PM +0000, Marc Murphy wrote: > > > static __init void tam3517_ehci_init(void) { > > > /* Configure GPIO for EHCI port */ > > > omap_mux_init_gpio(TAM3517_EHCI_RESET, OMAP_PIN_OUTPUT); > > > > > > gpio_request(TAM3517_EHCI_RESET, "USB_RESET"); > > > gpio_direction_output(TAM3517_EHCI_RESET, 1); > > > gpio_export(TAM3517_EHCI_RESET, 0); > > > > why are you exporting this gpio ? > > > It makes no difference whether I configure the GPIO or not. gpio_export() is only to expose the gpio to sysfs. Check if that pin is active high or active low. Then what you need, most likely, is something like below: gpio_direction_output(RESET, HIGH); usleep_range(50000, 2000000); gpio_set_value(RESET, LOW); (assuming active high here) -- balbi
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