usb: ehci-tegra: Add vbus_gpio to platform data

Add a vbus_gpio field to platform data. This mirrors the device tree
property nvidia,vbus-gpio. This makes the VBUS GPIO handling identical
between booting with board files and device tree; the driver always does
it.

This removes the need for board files to request and initialize the GPIO
early during their boot process, perhaps even before the GPIO driver is
ready to process the request.

Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Alan Stern <stern@rowland.harvard.edu>
Cc: linux-usb@vger.kernel.org
Signed-off-by: Stephen Warren <swarren@nvidia.com>
Acked-by: Olof Johansson <olof@lixom.net>

1 files changed, 7 insertions, 6 deletions

diff --git a/drivers/usb/host/ehci-tegra.c b/drivers/usb/host/ehci-tegra.c
index 73544bd440b..9692bef159f 100644
--- a/drivers/usb/host/ehci-tegra.c
+++ b/drivers/usb/host/ehci-tegra.c
@@ -581,15 +581,16 @@ static const struct hc_driver tegra_ehci_hc_driver = {
         .port_handed_over       = ehci_port_handed_over,
 };
 
-static int setup_vbus_gpio(struct platform_device *pdev)
+static int setup_vbus_gpio(struct platform_device *pdev,
+                           struct tegra_ehci_platform_data *pdata)
 {
         int err = 0;
         int gpio;
 
-        if (!pdev->dev.of_node)
-                return 0;
-
-        gpio = of_get_named_gpio(pdev->dev.of_node, "nvidia,vbus-gpio", 0);
+        gpio = pdata->vbus_gpio;
+        if (!gpio_is_valid(gpio))
+                gpio = of_get_named_gpio(pdev->dev.of_node,
+                                         "nvidia,vbus-gpio", 0);
         if (!gpio_is_valid(gpio))
                 return 0;
 
@@ -633,7 +634,7 @@ static int tegra_ehci_probe(struct platform_device *pdev)
         if (!pdev->dev.dma_mask)
                 pdev->dev.dma_mask = &tegra_ehci_dma_mask;
 
-        setup_vbus_gpio(pdev);
+        setup_vbus_gpio(pdev, pdata);
 
         tegra = kzalloc(sizeof(struct tegra_ehci_hcd), GFP_KERNEL);
         if (!tegra)