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USB: ohci-at91 uses generic GPIO calls

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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: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
David Brownell 2007-12-27 11:19:49 -08:00 committed by Greg Kroah-Hartman
parent 979e524a9c
commit 4bde4a4c4f
1 changed files with 31 additions and 0 deletions
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31
drivers/usb/host/ohci-at91.c
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@ -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);
}