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authorNicolas Ferre <nicolas.ferre@atmel.com>2012-03-21 16:58:11 +0100
committerNicolas Ferre <nicolas.ferre@atmel.com>2012-04-04 18:35:15 +0200
commitaaf9f5fc67c18259760d6302e679dcb3e36709a7 (patch)
treecfefa6118d7cdf38cd9c11769f242f784bc7b1c7 /drivers
parent74adcb210685e7191425b6203e67c08d759412fa (diff)
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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: Nicolas Ferre <nicolas.ferre@atmel.com> Acked-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com> Acked-by: Alan Stern <stern@rowland.harvard.edu>
Diffstat (limited to 'drivers')
-rw-r--r--drivers/usb/host/ohci-at91.c88
1 files changed, 46 insertions, 42 deletions
diff --git a/drivers/usb/host/ohci-at91.c b/drivers/usb/host/ohci-at91.c
index 4d266ae5152d..c30da6ab9f92 100644
--- a/drivers/usb/host/ohci-at91.c
+++ b/drivers/usb/host/ohci-at91.c
@@ -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 = 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(pdata->overcurrent_pin[i]),
+ 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");
}
}
}