This patch retrieves and configures the vbus control gpio via
the device tree.
This patch is based on a ehci-s5p.c commit fd81d59c90d38661
("USB: ehci-s5p: Add vbus setup function to the s5p ehci glue layer").
Signed-off-by: Antony Pavlov <antonynpavlov@xxxxxxxxx>
Cc: Alan Stern <stern@xxxxxxxxxxxxxxxxxxx>
Cc: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
Cc: linux-usb@xxxxxxxxxxxxxxx
Cc: linux-kernel@xxxxxxxxxxxxxxx
---
drivers/usb/host/ehci-platform.c | 22 ++++++++++++++++++++++
1 file changed, 22 insertions(+)
diff --git a/drivers/usb/host/ehci-platform.c b/drivers/usb/host/ehci-platform.c
index bd7082f2..0d95ced 100644
--- a/drivers/usb/host/ehci-platform.c
+++ b/drivers/usb/host/ehci-platform.c
@@ -28,6 +28,7 @@
#include <linux/io.h>
#include <linux/module.h>
#include <linux/of.h>
+#include <linux/of_gpio.h>
#include <linux/phy/phy.h>
#include <linux/platform_device.h>
#include <linux/reset.h>
@@ -142,6 +143,25 @@ static struct usb_ehci_pdata ehci_platform_defaults = {
.power_off = ehci_platform_power_off,
};
+static void setup_vbus_gpio(struct device *dev)
+{
+ int err;
+ int gpio;
+
+ if (!dev->of_node)
+ return;
+
+ gpio = of_get_named_gpio(dev->of_node, "vbus-gpio", 0);
+ if (!gpio_is_valid(gpio))
+ return;
+
+ err = devm_gpio_request_one(dev, gpio,
+ GPIOF_OUT_INIT_HIGH | GPIOF_EXPORT_DIR_FIXED,
+ "ehci_vbus_gpio");
+ if (err)
+ dev_err(dev, "can't request ehci vbus gpio %d", gpio);
+}
+
static int ehci_platform_probe(struct platform_device *dev)
{
struct usb_hcd *hcd;
@@ -174,6 +194,8 @@ static int ehci_platform_probe(struct platform_device *dev)
return irq;
}
+ setup_vbus_gpio(&dev->dev);
+
hcd = usb_create_hcd(&ehci_platform_hc_driver, &dev->dev,
dev_name(&dev->dev));
if (!hcd)
--
2.7.0
