Merge tag 'dt' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc

Device tree conversions for samsung and tegra

Both platforms had some initial device tree support, but this adds
much more to actually make it usable.

* tag 'dt' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc: (45 commits)
  ARM: dts: Add intial dts file for EXYNOS4210 SoC, SMDKV310 and ORIGEN
  ARM: EXYNOS: Add Exynos4 device tree enabled board file
  rtc: rtc-s3c: Add device tree support
  input: samsung-keypad: Add device tree support
  ARM: S5PV210: Modify platform data for pl330 driver
  ARM: S5PC100: Modify platform data for pl330 driver
  ARM: S5P64x0: Modify platform data for pl330 driver
  ARM: EXYNOS: Add a alias for pdma clocks
  ARM: EXYNOS: Limit usage of pl330 device instance to non-dt build
  ARM: SAMSUNG: Add device tree support for pl330 dma engine wrappers
  DMA: PL330: Add device tree support
  ARM: EXYNOS: Modify platform data for pl330 driver
  DMA: PL330: Infer transfer direction from transfer request instead of platform data
  DMA: PL330: move filter function into driver
  serial: samsung: Fix build for non-Exynos4210 devices
  serial: samsung: add device tree support
  serial: samsung: merge probe() function from all SoC specific extensions
  serial: samsung: merge all SoC specific port reset functions
  ARM: SAMSUNG: register uart clocks to clock lookup list
  serial: samsung: remove all uses of get_clksrc and set_clksrc
  ...

Fix up fairly trivial conflicts in arch/arm/mach-s3c2440/clock.c and
drivers/tty/serial/Kconfig both due to just adding code close to
changes.

1 files changed, 71 insertions, 0 deletions

diff --git a/drivers/usb/host/ehci-tegra.c b/drivers/usb/host/ehci-tegra.c
index db9d1b4..dbc7fe8 100644
--- a/drivers/usb/host/ehci-tegra.c
+++ b/drivers/usb/host/ehci-tegra.c
@@ -21,7 +21,12 @@
 #include <linux/platform_data/tegra_usb.h>
 #include <linux/irq.h>
 #include <linux/usb/otg.h>
+#include <linux/gpio.h>
+#include <linux/of.h>
+#include <linux/of_gpio.h>
+
 #include <mach/usb_phy.h>
+#include <mach/iomap.h>
 
 #define TEGRA_USB_DMA_ALIGN 32
 
@@ -574,6 +579,35 @@ 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)
+{
+	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);
+	if (!gpio_is_valid(gpio))
+		return 0;
+
+	err = gpio_request(gpio, "vbus_gpio");
+	if (err) {
+		dev_err(&pdev->dev, "can't request vbus gpio %d", gpio);
+		return err;
+	}
+	err = gpio_direction_output(gpio, 1);
+	if (err) {
+		dev_err(&pdev->dev, "can't enable vbus\n");
+		return err;
+	}
+	gpio_set_value(gpio, 1);
+
+	return err;
+}
+
+static u64 tegra_ehci_dma_mask = DMA_BIT_MASK(32);
+
 static int tegra_ehci_probe(struct platform_device *pdev)
 {
 	struct resource *res;
@@ -590,6 +624,15 @@ static int tegra_ehci_probe(struct platform_device *pdev)
 		return -EINVAL;
 	}
 
+	/* Right now device-tree probed devices don't get dma_mask set.
+	 * Since shared usb code relies on it, set it here for now.
+	 * Once we have dma capability bindings this can go away.
+	 */
+	if (!pdev->dev.dma_mask)
+		pdev->dev.dma_mask = &tegra_ehci_dma_mask;
+
+	setup_vbus_gpio(pdev);
+
 	tegra = kzalloc(sizeof(struct tegra_ehci_hcd), GFP_KERNEL);
 	if (!tegra)
 		return -ENOMEM;
@@ -640,6 +683,28 @@ static int tegra_ehci_probe(struct platform_device *pdev)
 		goto fail_io;
 	}
 
+	/* This is pretty ugly and needs to be fixed when we do only
+	 * device-tree probing. Old code relies on the platform_device
+	 * numbering that we lack for device-tree-instantiated devices.
+	 */
+	if (instance < 0) {
+		switch (res->start) {
+		case TEGRA_USB_BASE:
+			instance = 0;
+			break;
+		case TEGRA_USB2_BASE:
+			instance = 1;
+			break;
+		case TEGRA_USB3_BASE:
+			instance = 2;
+			break;
+		default:
+			err = -ENODEV;
+			dev_err(&pdev->dev, "unknown usb instance\n");
+			goto fail_phy;
+		}
+	}
+
 	tegra->phy = tegra_usb_phy_open(instance, hcd->regs, pdata->phy_config,
 						TEGRA_USB_PHY_MODE_HOST);
 	if (IS_ERR(tegra->phy)) {
@@ -773,6 +838,11 @@ static void tegra_ehci_hcd_shutdown(struct platform_device *pdev)
 		hcd->driver->shutdown(hcd);
 }
 
+static struct of_device_id tegra_ehci_of_match[] __devinitdata = {
+	{ .compatible = "nvidia,tegra20-ehci", },
+	{ },
+};
+
 static struct platform_driver tegra_ehci_driver = {
 	.probe		= tegra_ehci_probe,
 	.remove		= tegra_ehci_remove,
@@ -783,5 +853,6 @@ static struct platform_driver tegra_ehci_driver = {
 	.shutdown	= tegra_ehci_hcd_shutdown,
 	.driver		= {
 		.name	= "tegra-ehci",
+		.of_match_table = tegra_ehci_of_match,
 	}
 };