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ARM: at91: usb ehci add dt support

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Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
Cc: Nicolas Ferre <nicolas.ferre@atmel.com>
Acked-by: Grant Likely <grant.likely@secretlab.ca>
Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Jean-Christophe PLAGNIOL-VILLARD 2011-11-22 12:11:13 +08:00
parent 6a06245990
commit 9d84300335
2 changed files with 35 additions and 1 deletions
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12
Documentation/devicetree/bindings/usb/atmel-usb.txt
View file

@ -17,3 +17,15 @@ usb0: ohci@00500000 {
interrupts = <20 4>;
num-ports = <2>;
};
EHCI
Required properties:
- compatible: Should be "atmel,at91sam9g45-ehci" for USB controllers
used in host mode.
usb1: ehci@00800000 {
compatible = "atmel,at91sam9g45-ehci", "usb-ehci";
reg = <0x00800000 0x100000>;
interrupts = <22 4>;
};

24
drivers/usb/host/ehci-atmel.c
View file

@ -13,6 +13,7 @@
#include <linux/clk.h>
#include <linux/platform_device.h>
#include <linux/of_platform.h>
/* interface and function clocks */
static struct clk *iclk, *fclk;
@ -115,6 +116,8 @@ static const struct hc_driver ehci_atmel_hc_driver = {
.clear_tt_buffer_complete = ehci_clear_tt_buffer_complete,
};
static u64 at91_ehci_dma_mask = DMA_BIT_MASK(32);
static int __devinit ehci_atmel_drv_probe(struct platform_device *pdev)
{
struct usb_hcd *hcd;
@ -137,6 +140,13 @@ static int __devinit ehci_atmel_drv_probe(struct platform_device *pdev)
goto fail_create_hcd;
}
/* 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 = &at91_ehci_dma_mask;
hcd = usb_create_hcd(driver, &pdev->dev, dev_name(&pdev->dev));
if (!hcd) {
retval = -ENOMEM;
@ -225,9 +235,21 @@ static int __devexit ehci_atmel_drv_remove(struct platform_device *pdev)
return 0;
}
#ifdef CONFIG_OF
static const struct of_device_id atmel_ehci_dt_ids[] = {
{ .compatible = "atmel,at91sam9g45-ehci" },
{ /* sentinel */ }
};
MODULE_DEVICE_TABLE(of, atmel_ehci_dt_ids);
#endif
static struct platform_driver ehci_atmel_driver = {
.probe = ehci_atmel_drv_probe,
.remove = __devexit_p(ehci_atmel_drv_remove),
.shutdown = usb_hcd_platform_shutdown,
.driver.name = "atmel-ehci",
.driver = {
.name = "atmel-ehci",
.of_match_table = of_match_ptr(atmel_ehci_dt_ids),
},
};