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USB: at91: Device udc add dt support 

Allow to compile it if AT91 is enable.

Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
hifive-unleashed-5.1
Jean-Christophe PLAGNIOL-VILLARD 2012-01-28 22:35:36 +08:00
parent 62c5553ab7
commit d1494a3408
3 changed files with 57 additions and 3 deletions
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18
Documentation/devicetree/bindings/usb/atmel-usb.txt
View File

@ -29,3 +29,21 @@ usb1: ehci@00800000 {
reg = <0x00800000 0x100000>;
interrupts = <22 4>;
};
AT91 USB device controller
Required properties:
- compatible: Should be "atmel,at91rm9200-udc"
- reg: Address and length of the register set for the device
- interrupts: Should contain macb interrupt
Optional properties:
- atmel,vbus-gpio: If present, specifies a gpio that needs to be
activated for the bus to be powered.
usb1: gadget@fffa4000 {
compatible = "atmel,at91rm9200-udc";
reg = <0xfffa4000 0x4000>;
interrupts = <10 4>;
atmel,vbus-gpio = <&pioC 5 0>;
};

2
drivers/usb/gadget/Kconfig
View File

@ -137,7 +137,7 @@ choice
config USB_AT91
tristate "Atmel AT91 USB Device Port"
depends on ARCH_AT91 && !ARCH_AT91SAM9RL && !ARCH_AT91SAM9G45
depends on ARCH_AT91
help
Many Atmel AT91 processors (such as the AT91RM2000) have a
full speed USB Device Port with support for five configurable

40
drivers/usb/gadget/at91_udc.c
View File

@ -30,6 +30,8 @@
#include <linux/usb/ch9.h>
#include <linux/usb/gadget.h>
#include <linux/prefetch.h>
#include <linux/of.h>
#include <linux/of_gpio.h>
#include <asm/byteorder.h>
#include <mach/hardware.h>
@ -1707,7 +1709,27 @@ static void at91udc_shutdown(struct platform_device *dev)
spin_unlock_irqrestore(&udc->lock, flags);
}
static int __init at91udc_probe(struct platform_device *pdev)
static void __devinit at91udc_of_init(struct at91_udc *udc,
struct device_node *np)
{
struct at91_udc_data *board = &udc->board;
u32 val;
enum of_gpio_flags flags;
if (of_property_read_u32(np, "atmel,vbus-polled", &val) == 0)
board->vbus_polled = 1;
board->vbus_pin = of_get_named_gpio_flags(np, "atmel,vbus-gpio", 0,
&flags);
board->vbus_active_low = (flags & OF_GPIO_ACTIVE_LOW) ? 1 : 0;
board->pullup_pin = of_get_named_gpio_flags(np, "atmel,pullup-gpio", 0,
&flags);
board->pullup_active_low = (flags & OF_GPIO_ACTIVE_LOW) ? 1 : 0;
}
static int __devinit at91udc_probe(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
struct at91_udc *udc;
@ -1742,7 +1764,11 @@ static int __init at91udc_probe(struct platform_device *pdev)
/* init software state */
udc = &controller;
udc->gadget.dev.parent = dev;
udc->board = *(struct at91_udc_data *) dev->platform_data;
if (pdev->dev.of_node)
at91udc_of_init(udc, pdev->dev.of_node);
else
memcpy(&udc->board, dev->platform_data,
sizeof(struct at91_udc_data));
udc->pdev = pdev;
udc->enabled = 0;
spin_lock_init(&udc->lock);
@ -1971,6 +1997,15 @@ static int at91udc_resume(struct platform_device *pdev)
#define at91udc_resume NULL
#endif
#if defined(CONFIG_OF)
static const struct of_device_id at91_udc_dt_ids[] = {
{ .compatible = "atmel,at91rm9200-udc" },
{ /* sentinel */ }
};
MODULE_DEVICE_TABLE(of, at91_udc_dt_ids);
#endif
static struct platform_driver at91_udc_driver = {
.remove = __exit_p(at91udc_remove),
.shutdown = at91udc_shutdown,
@ -1979,6 +2014,7 @@ static struct platform_driver at91_udc_driver = {
.driver = {
.name = (char *) driver_name,
.owner = THIS_MODULE,
.of_match_table = of_match_ptr(at91_udc_dt_ids),
},
};