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authorLinus Torvalds <torvalds@linux-foundation.org>2012-01-09 23:28:38 +0100
committerLinus Torvalds <torvalds@linux-foundation.org>2012-01-09 23:28:38 +0100
commitdfc1ebe76663d582a01c9dc572395cf8086d01de (patch)
tree54a5ac91214a90f82c27b6e38099a4470837729e /drivers/usb
parentMerge tag 'cleanup' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc (diff)
parentMerge branch 'samsung/dt' into next/dt (diff)
downloadlinux-dfc1ebe76663d582a01c9dc572395cf8086d01de.tar.xz
linux-dfc1ebe76663d582a01c9dc572395cf8086d01de.zip
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.
Diffstat (limited to 'drivers/usb')
-rw-r--r--drivers/usb/host/ehci-tegra.c71
1 files changed, 71 insertions, 0 deletions
diff --git a/drivers/usb/host/ehci-tegra.c b/drivers/usb/host/ehci-tegra.c
index db9d1b4bfbdc..dbc7fe8ca9e7 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,
}
};