From e7da859e424ccc30d2ef87dbabf655ad3d59f291 Mon Sep 17 00:00:00 2001 From: Thomas Petazzoni Date: Wed, 13 Jul 2011 11:29:16 +0200 Subject: [PATCH] at91: ohci-at91: add vbus_pin_inverted platform attribute The existing OHCI AT91 driver made the assumption that the enable input of the USB power switch was active low. However, some USB power switches such as the Micrel MIC2026-1 [1] have an active high input to enable the power. A new vbus_pin_inverted attribute is added to the at91_usbh_data structure so that board files can tell the OHCI driver if the vbus pin logic is active low or active high. [1] http://www.micrel.com/page.do?page=product-info/products/mic2026.shtml Signed-off-by: Thomas Petazzoni Signed-off-by: Nicolas Ferre --- arch/arm/mach-at91/include/mach/board.h | 1 + drivers/usb/host/ohci-at91.c | 4 ++-- 2 files changed, 3 insertions(+), 2 deletions(-) diff --git a/arch/arm/mach-at91/include/mach/board.h b/arch/arm/mach-at91/include/mach/board.h index ed544a0d5a1d..61d52dc05051 100644 --- a/arch/arm/mach-at91/include/mach/board.h +++ b/arch/arm/mach-at91/include/mach/board.h @@ -98,6 +98,7 @@ extern void __init at91_add_device_eth(struct at91_eth_data *data); struct at91_usbh_data { u8 ports; /* number of ports on root hub */ u8 vbus_pin[2]; /* port power-control pin */ + u8 vbus_pin_inverted; }; extern void __init at91_add_device_usbh(struct at91_usbh_data *data); extern void __init at91_add_device_usbh_ohci(struct at91_usbh_data *data); diff --git a/drivers/usb/host/ohci-at91.c b/drivers/usb/host/ohci-at91.c index e08cb10d1aca..5dd381fc2ddb 100644 --- a/drivers/usb/host/ohci-at91.c +++ b/drivers/usb/host/ohci-at91.c @@ -279,7 +279,7 @@ static int ohci_hcd_at91_drv_probe(struct platform_device *pdev) if (pdata->vbus_pin[i] <= 0) continue; gpio_request(pdata->vbus_pin[i], "ohci_vbus"); - gpio_direction_output(pdata->vbus_pin[i], 0); + gpio_direction_output(pdata->vbus_pin[i], pdata->vbus_pin_inverted); } } @@ -296,7 +296,7 @@ static int ohci_hcd_at91_drv_remove(struct platform_device *pdev) for (i = 0; i < ARRAY_SIZE(pdata->vbus_pin); i++) { if (pdata->vbus_pin[i] <= 0) continue; - gpio_direction_output(pdata->vbus_pin[i], 1); + gpio_direction_output(pdata->vbus_pin[i], !pdata->vbus_pin_inverted); gpio_free(pdata->vbus_pin[i]); } }