Commit aaf9f5fc authored by Nicolas Ferre's avatar Nicolas Ferre
Browse files

USB: ohci-at91: rework and fix initialization 



The DT information are filled in a pdata structure and then passed on
to the usual check code of the probe function. Thus we do not need to
redo the gpio checking and irq configuration in the DT-related code.
On the other hand, we setup GPIO direction in driver for vbus and
overcurrent. It will be useful when moving to pinctrl subsystem.

Signed-off-by: default avatarNicolas Ferre <nicolas.ferre@atmel.com>
Acked-by: default avatarJean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
Acked-by: default avatarAlan Stern <stern@rowland.harvard.edu>
parent 74adcb21

drivers/usb/host/ohci-at91.c

+46 −42
Original line number Diff line number Diff line
@@ -492,7 +492,7 @@ static u64 at91_ohci_dma_mask = DMA_BIT_MASK(32); 
static int __devinit ohci_at91_of_init(struct platform_device *pdev)

{

	struct device_node *np = pdev->dev.of_node;

	int i, ret, gpio;

	int i, gpio;

	enum of_gpio_flags flags;

	struct at91_usbh_data	*pdata;

	u32 ports;
@@ -520,42 +520,11 @@ static int __devinit ohci_at91_of_init(struct platform_device *pdev) 
		if (!gpio_is_valid(gpio))

			continue;

		pdata->vbus_pin_active_low[i] = flags & OF_GPIO_ACTIVE_LOW;

		ret = gpio_request(gpio, "ohci_vbus");

		if (ret) {

			dev_warn(&pdev->dev, "can't request vbus gpio %d", gpio);

			continue;

		}

		ret = gpio_direction_output(gpio, !(flags & OF_GPIO_ACTIVE_LOW) ^ 1);

		if (ret)

			dev_warn(&pdev->dev, "can't put vbus gpio %d as output %d",

				 !(flags & OF_GPIO_ACTIVE_LOW) ^ 1, gpio);

	}



	for (i = 0; i < 2; i++) {

		gpio = of_get_named_gpio_flags(np, "atmel,oc-gpio", i, &flags);

		pdata->overcurrent_pin[i] = gpio;

		if (!gpio_is_valid(gpio))

			continue;

		ret = gpio_request(gpio, "ohci_overcurrent");

		if (ret) {

			dev_err(&pdev->dev, "can't request overcurrent gpio %d", gpio);

			continue;

	}



		ret = gpio_direction_input(gpio);

		if (ret) {

			dev_err(&pdev->dev, "can't configure overcurrent gpio %d as input", gpio);

			continue;

		}



		ret = request_irq(gpio_to_irq(gpio),

				  ohci_hcd_at91_overcurrent_irq,

				  IRQF_SHARED, "ohci_overcurrent", pdev);

		if (ret) {

			gpio_free(gpio);

			dev_warn(& pdev->dev, "cannot get GPIO IRQ for overcurrent\n");

		}

	}

	for (i = 0; i < 2; i++)

		pdata->overcurrent_pin[i] =

			of_get_named_gpio_flags(np, "atmel,oc-gpio", i, &flags);



	pdev->dev.platform_data = pdata;
@@ -574,6 +543,8 @@ static int ohci_hcd_at91_drv_probe(struct platform_device *pdev) 
{

	struct at91_usbh_data	*pdata;

	int			i;

	int			gpio;

	int			ret;



	i = ohci_at91_of_init(pdev);
@@ -586,23 +557,56 @@ static int ohci_hcd_at91_drv_probe(struct platform_device *pdev) 
		for (i = 0; i < ARRAY_SIZE(pdata->vbus_pin); i++) {

			if (!gpio_is_valid(pdata->vbus_pin[i]))

				continue;

			gpio_request(pdata->vbus_pin[i], "ohci_vbus");

			gpio = pdata->vbus_pin[i];



			ret = gpio_request(gpio, "ohci_vbus");

			if (ret) {

				dev_err(&pdev->dev,

					"can't request vbus gpio %d\n", gpio);

				continue;

			}

			ret = gpio_direction_output(gpio,

						!pdata->vbus_pin_active_low[i]);

			if (ret) {

				dev_err(&pdev->dev,

					"can't put vbus gpio %d as output %d\n",

					gpio, !pdata->vbus_pin_active_low[i]);

				gpio_free(gpio);

				continue;

			}



			ohci_at91_usb_set_power(pdata, i, 1);

		}



		for (i = 0; i < ARRAY_SIZE(pdata->overcurrent_pin); i++) {

			int ret;



			if (!gpio_is_valid(pdata->overcurrent_pin[i]))

				continue;

			gpio_request(pdata->overcurrent_pin[i], "ohci_overcurrent");

			gpio = pdata->overcurrent_pin[i];



			ret = gpio_request(gpio, "ohci_overcurrent");

			if (ret) {

				dev_err(&pdev->dev,

					"can't request overcurrent gpio %d\n",

					gpio);

				continue;

			}



			ret = request_irq(gpio_to_irq(pdata->overcurrent_pin[i]),

			ret = gpio_direction_input(gpio);

			if (ret) {

				dev_err(&pdev->dev,

					"can't configure overcurrent gpio %d as input\n",

					gpio);

				gpio_free(gpio);

				continue;

			}



			ret = request_irq(gpio_to_irq(gpio),

					  ohci_hcd_at91_overcurrent_irq,

					  IRQF_SHARED, "ohci_overcurrent", pdev);

			if (ret) {

				gpio_free(pdata->overcurrent_pin[i]);

				dev_warn(& pdev->dev, "cannot get GPIO IRQ for overcurrent\n");

				gpio_free(gpio);

				dev_err(&pdev->dev,

					"can't get gpio IRQ for overcurrent\n");

			}

		}

	}

CRA Git | Maintained and supported by SUSTech CRA and CCSE