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/host/ehci-s5p.c b/drivers/usb/host/ehci-s5p.c
index 58b0409..8d5dc03 100644
--- a/drivers/usb/host/ehci-s5p.c
+++ b/drivers/usb/host/ehci-s5p.c
@@ -15,6 +15,7 @@
#include <linux/clk.h>
#include <linux/of.h>
#include <linux/platform_device.h>
+#include <linux/of_gpio.h>
#include <plat/ehci.h>
#include <plat/usb-phy.h>
@@ -64,6 +65,29 @@ static const struct hc_driver s5p_ehci_hc_driver = {
.clear_tt_buffer_complete = ehci_clear_tt_buffer_complete,
};
+static int s5p_ehci_setup_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, "ehci_vbus_gpio");
+ if (err) {
+ dev_err(&pdev->dev, "can't request ehci vbus gpio %d", gpio);
+ return err;
+ }
+ gpio_set_value(gpio, 1);
+
+ return err;
+}
+
static u64 ehci_s5p_dma_mask = DMA_BIT_MASK(32);
static int __devinit s5p_ehci_probe(struct platform_device *pdev)
@@ -87,6 +111,8 @@ static int __devinit s5p_ehci_probe(struct platform_device *pdev)
if (!pdev->dev.coherent_dma_mask)
pdev->dev.coherent_dma_mask = DMA_BIT_MASK(32);
+ s5p_ehci_setup_gpio(pdev);
+
s5p_ehci = kzalloc(sizeof(struct s5p_ehci_hcd), GFP_KERNEL);
if (!s5p_ehci)
return -ENOMEM;
--
1.7.0.4
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