From: Abhilash Kesavan <a.kesavan@xxxxxxxxxxx>
This patch retrieves and configures the vbus control gpio via
the device tree. The suspend/resume callbacks will be later
modified for vbus control.
Signed-off-by: Abhilash Kesavan <a.kesavan@xxxxxxxxxxx>
Signed-off-by: Vivek Gautam <gautam.vivek@xxxxxxxxxxx>
diff --git a/drivers/usb/dwc3/dwc3-exynos.c b/drivers/usb/dwc3/dwc3-exynos.c
index 8014a1f..4f95bdf 100644
--- a/drivers/usb/dwc3/dwc3-exynos.c
+++ b/drivers/usb/dwc3/dwc3-exynos.c
@@ -21,6 +21,7 @@
#include <linux/module.h>
#include <linux/clk.h>
#include <linux/of.h>
+#include <linux/of_gpio.h>
#include "core.h"
@@ -31,6 +32,29 @@ struct dwc3_exynos {
struct clk *clk;
};
+static int dwc3_setup_vbus_gpio(struct platform_device *pdev)
+{
+ int err = 0;
+ int gpio;
+
+ if (!pdev->dev.of_node)
+ return 0;
+
+ gpio = of_get_named_gpio(pdev->dev.of_node,
+ "samsung,vbus-gpio", 0);
+ if (!gpio_is_valid(gpio))
+ return 0;
+
+ err = gpio_request(gpio, "dwc3_vbus_gpio");
+ if (err) {
+ dev_err(&pdev->dev, "can't request dwc3 vbus gpio %d", gpio);
+ return err;
+ }
+ gpio_set_value(gpio, 1);
+
+ return err;
+}
+
static u64 dwc3_exynos_dma_mask = DMA_BIT_MASK(32);
static int __devinit dwc3_exynos_probe(struct platform_device *pdev)
@@ -55,6 +79,8 @@ static int __devinit dwc3_exynos_probe(struct platform_device *pdev)
if (!pdev->dev.coherent_dma_mask)
pdev->dev.coherent_dma_mask = DMA_BIT_MASK(32);
+ dwc3_setup_vbus_gpio(pdev);
+
platform_set_drvdata(pdev, exynos);
devid = dwc3_get_device_id();
--
1.7.0.4
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