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 <thomas.petazzoni@free-electrons.com> Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com>
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@ -98,6 +98,7 @@ extern void __init at91_add_device_eth(struct at91_eth_data *data);
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struct at91_usbh_data {
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u8 ports; /* number of ports on root hub */
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u8 vbus_pin[2]; /* port power-control pin */
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u8 vbus_pin_inverted;
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};
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extern void __init at91_add_device_usbh(struct at91_usbh_data *data);
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extern void __init at91_add_device_usbh_ohci(struct at91_usbh_data *data);
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@ -279,7 +279,7 @@ static int ohci_hcd_at91_drv_probe(struct platform_device *pdev)
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if (pdata->vbus_pin[i] <= 0)
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continue;
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gpio_request(pdata->vbus_pin[i], "ohci_vbus");
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gpio_direction_output(pdata->vbus_pin[i], 0);
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gpio_direction_output(pdata->vbus_pin[i], pdata->vbus_pin_inverted);
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}
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}
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@ -296,7 +296,7 @@ static int ohci_hcd_at91_drv_remove(struct platform_device *pdev)
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for (i = 0; i < ARRAY_SIZE(pdata->vbus_pin); i++) {
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if (pdata->vbus_pin[i] <= 0)
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continue;
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gpio_direction_output(pdata->vbus_pin[i], 1);
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gpio_direction_output(pdata->vbus_pin[i], !pdata->vbus_pin_inverted);
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gpio_free(pdata->vbus_pin[i]);
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}
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}
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