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

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

Signed-off-by: Roger Quadros <rogerq@ti.com>
Reviewed-by: Mark Rutland <mark.rutland@arm.com>
Acked-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Roger Quadros 2013-03-12 12:44:47 +02:00 committed by Greg Kroah-Hartman
parent 8c3ec38550
commit 5867320dec
2 changed files with 34 additions and 0 deletions
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15
Documentation/devicetree/bindings/usb/ohci-omap3.txt Normal file
View File

@ -0,0 +1,15 @@
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>;
};

19
drivers/usb/host/ohci-omap3.c
View File

@ -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),
},
};