Commit 5867320d authored by Roger Quadros's avatar Roger Quadros Committed by Greg Kroah-Hartman
Browse files

USB: ohci-omap3: Add device tree support and binding information 



Allows the OHCI controller found in OMAP3 and later chips to
be specified via device tree.

Signed-off-by: default avatarRoger Quadros <rogerq@ti.com>
Reviewed-by: default avatarMark Rutland <mark.rutland@arm.com>
Acked-by: default avatarAlan Stern <stern@rowland.harvard.edu>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 8c3ec385

Documentation/devicetree/bindings/usb/ohci-omap3.txt

0 → 100644
+15 −0
Original line number Diff line number Diff line 
OMAP HS USB OHCI controller (OMAP3 and later)



Required properties:



- compatible: should be "ti,ohci-omap3"

- reg: should contain one register range i.e. start and length

- interrupts: description of the interrupt line



Example for OMAP4:



usbhsohci: ohci@4a064800 {

	compatible = "ti,ohci-omap3", "usb-ohci";

	reg = <0x4a064800 0x400>;

	interrupts = <0 76 0x4>;

};

drivers/usb/host/ohci-omap3.c

+19 −0
Original line number Diff line number Diff line
@@ -31,6 +31,8 @@ 


#include <linux/platform_device.h>

#include <linux/pm_runtime.h>

#include <linux/of.h>

#include <linux/dma-mapping.h>



/*-------------------------------------------------------------------------*/
@@ -112,6 +114,8 @@ static const struct hc_driver ohci_omap3_hc_driver = { 


/*-------------------------------------------------------------------------*/



static u64 omap_ohci_dma_mask = DMA_BIT_MASK(32);



/*

 * configure so an HC device and id are always provided

 * always called with process context; sleeping is OK
@@ -159,6 +163,13 @@ static int ohci_hcd_omap3_probe(struct platform_device *pdev) 
		return -ENOMEM;

	}



	/*

	 * Right now device-tree probed devices don't get dma_mask set.

	 * Since shared usb code relies on it, set it here for now.

	 * Once we have dma capability bindings this can go away.

	 */

	if (!pdev->dev.dma_mask)

		pdev->dev.dma_mask = &omap_ohci_dma_mask;



	hcd = usb_create_hcd(&ohci_omap3_hc_driver, dev,

			dev_name(dev));
@@ -228,12 +239,20 @@ static void ohci_hcd_omap3_shutdown(struct platform_device *pdev) 
		hcd->driver->shutdown(hcd);

}



static const struct of_device_id omap_ohci_dt_ids[] = {

	{ .compatible = "ti,ohci-omap3" },

	{ }

};



MODULE_DEVICE_TABLE(of, omap_ohci_dt_ids);



static struct platform_driver ohci_hcd_omap3_driver = {

	.probe		= ohci_hcd_omap3_probe,

	.remove		= ohci_hcd_omap3_remove,

	.shutdown	= ohci_hcd_omap3_shutdown,

	.driver		= {

		.name	= "ohci-omap3",

		.of_match_table = of_match_ptr(omap_ohci_dt_ids),

	},

};

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