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Commit 4bde4a4c authored by David Brownell's avatar David Brownell Committed by Greg Kroah-Hartman
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USB: ohci-at91 uses generic GPIO calls 



Update the ohci-at91 bus glue to start understanding about the per-port
power switch GPIOs it's given (on the sam9263-ek and potentially other
boards).  For the moment this just claims them and forces them active
(assuming active-low power enables) whenever the HCD is loaded.

The assumption is still that board setup configures the GPIOs.  Using
gpio_request() tracks actual usage and guards against conflict.

Signed-off-by: default avatarDavid Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@suse.de>
parent 979e524a

drivers/usb/host/ohci-at91.c

+31 −0
Original line number Diff line number Diff line
@@ -17,6 +17,8 @@ 


#include <asm/mach-types.h>

#include <asm/hardware.h>

#include <asm/gpio.h>



#include <asm/arch/board.h>

#include <asm/arch/cpu.h>
@@ -271,12 +273,41 @@ static const struct hc_driver ohci_at91_hc_driver = { 


static int ohci_hcd_at91_drv_probe(struct platform_device *pdev)

{

	struct at91_usbh_data	*pdata = pdev->dev.platform_data;

	int			i;



	if (pdata) {

		/* REVISIT make the driver support per-port power switching,

		 * and also overcurrent detection.  Here we assume the ports

		 * are always powered while this driver is active, and use

		 * active-low power switches.

		 */

		for (i = 0; i < pdata->ports; i++) {

			if (pdata->vbus_pin[i] <= 0)

				continue;

			gpio_request(pdata->vbus_pin[i], "ohci_vbus");

			gpio_direction_output(pdata->vbus_pin[i], 0);

		}

	}



	device_init_wakeup(&pdev->dev, 1);

	return usb_hcd_at91_probe(&ohci_at91_hc_driver, pdev);

}



static int ohci_hcd_at91_drv_remove(struct platform_device *pdev)

{

	struct at91_usbh_data	*pdata = pdev->dev.platform_data;

	int			i;



	if (pdata) {

		for (i = 0; i < pdata->ports; i++) {

			if (pdata->vbus_pin[i] <= 0)

				continue;

			gpio_direction_output(pdata->vbus_pin[i], 1);

			gpio_free(pdata->vbus_pin[i]);

		}

	}



	device_init_wakeup(&pdev->dev, 0);

	return usb_hcd_at91_remove(platform_get_drvdata(pdev), pdev);

}