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lantiq: Configure gpio power output pin when initializing dwc2 usb

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Port gpio code from original ltq-hcd driver to dwc2.

Signed-off-by: Antti Seppälä <a.seppala@gmail.com>
Signed-off-by: Vincent Pelletier <plr.vincent@gmail.com>

SVN-Revision: 44673
This commit is contained in:
John Crispin 2015-03-11 17:08:08 +00:00
parent a23da431dc
commit 2ddcf4c46e
1 changed files with 35 additions and 0 deletions
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35
target/linux/lantiq/patches-3.18/0040-USB-DWC2-enable-usb-power-gpio.patch Normal file
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@ -0,0 +1,35 @@
--- a/drivers/usb/dwc2/platform.c 2015-02-06 16:53:48.000000000 +0200
+++ b/drivers/usb/dwc2/platform.c 2015-02-09 19:22:41.974089626 +0200
@@ -40,6 +40,7 @@
#include <linux/device.h>
#include <linux/dma-mapping.h>
#include <linux/of_device.h>
+#include <linux/of_gpio.h>
#include <linux/platform_device.h>
#include <linux/usb/of.h>
@@ -154,6 +155,7 @@
struct resource *res;
int retval;
int irq;
+ int gpio_count;
if (usb_disabled())
return -ENODEV;
@@ -173,6 +175,16 @@
defparams.dma_desc_enable = 0;
}
+ gpio_count = of_gpio_count(dev->dev.of_node);
+ while (gpio_count > 0) {
+ enum of_gpio_flags flags;
+ int gpio = of_get_gpio_flags(dev->dev.of_node, --gpio_count, &flags);
+ if (gpio_request(gpio, "usb"))
+ continue;
+ dev_info(&dev->dev, "requested GPIO %d\n", gpio);
+ gpio_direction_output(gpio, (flags & OF_GPIO_ACTIVE_LOW) ? (0) : (1));
+ }
+
hsotg = devm_kzalloc(&dev->dev, sizeof(*hsotg), GFP_KERNEL);
if (!hsotg)
return -ENOMEM;