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authorAndrew Lunn <andrew@lunn.ch>2012-10-20 13:10:00 +0200
committerJason Cooper <jason@lakedaemon.net>2012-11-24 02:53:12 +0000
commit77dae54ab385033e488d8b07045bc7f8d931740f (patch)
tree370d645c4cc15cbcd85161973e1a6c3584c04614
parentec65aed950d619c6ec9883679631bdf6e7aa4527 (diff)
downloadop-kernel-dev-77dae54ab385033e488d8b07045bc7f8d931740f.zip
op-kernel-dev-77dae54ab385033e488d8b07045bc7f8d931740f.tar.gz
ARM: Kirkwood: ehci-orion: Add device tree binding
Based on previous work by Michael Walle and Jason Cooper. Made their work actually work, which required added interrupt from DT and auxdata, along with setting the dma_mask, which DT does not currently do. Signed-off-by: Andrew Lunn <andrew@lunn.ch> Tested-by: Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com> Acked-by: Alan Stern <stern@rowland.harvard.edu> Signed-off-by: Jason Cooper <jason@lakedaemon.net>
-rw-r--r--Documentation/devicetree/bindings/usb/ehci-orion.txt15
-rw-r--r--drivers/usb/host/ehci-orion.c38
2 files changed, 50 insertions, 3 deletions
diff --git a/Documentation/devicetree/bindings/usb/ehci-orion.txt b/Documentation/devicetree/bindings/usb/ehci-orion.txt
new file mode 100644
index 0000000..6bc09ec
--- /dev/null
+++ b/Documentation/devicetree/bindings/usb/ehci-orion.txt
@@ -0,0 +1,15 @@
+* EHCI controller, Orion Marvell variants
+
+Required properties:
+- compatible: must be "marvell,orion-ehci"
+- reg: physical base address of the controller and length of memory mapped
+ region.
+- interrupts: The EHCI interrupt
+
+Example:
+
+ ehci@50000 {
+ compatible = "marvell,orion-ehci";
+ reg = <0x50000 0x1000>;
+ interrupts = <19>;
+ };
diff --git a/drivers/usb/host/ehci-orion.c b/drivers/usb/host/ehci-orion.c
index 9c2717d..e7e8275 100644
--- a/drivers/usb/host/ehci-orion.c
+++ b/drivers/usb/host/ehci-orion.c
@@ -14,6 +14,9 @@
#include <linux/mbus.h>
#include <linux/clk.h>
#include <linux/platform_data/usb-ehci-orion.h>
+#include <linux/of.h>
+#include <linux/of_device.h>
+#include <linux/of_irq.h>
#define rdl(off) __raw_readl(hcd->regs + (off))
#define wrl(off, val) __raw_writel((val), hcd->regs + (off))
@@ -181,6 +184,8 @@ ehci_orion_conf_mbus_windows(struct usb_hcd *hcd,
}
}
+static u64 ehci_orion_dma_mask = DMA_BIT_MASK(32);
+
static int __devinit ehci_orion_drv_probe(struct platform_device *pdev)
{
struct orion_ehci_data *pd = pdev->dev.platform_data;
@@ -191,13 +196,17 @@ static int __devinit ehci_orion_drv_probe(struct platform_device *pdev)
struct clk *clk;
void __iomem *regs;
int irq, err;
+ enum orion_ehci_phy_ver phy_version;
if (usb_disabled())
return -ENODEV;
pr_debug("Initializing Orion-SoC USB Host Controller\n");
- irq = platform_get_irq(pdev, 0);
+ if (pdev->dev.of_node)
+ irq = irq_of_parse_and_map(pdev->dev.of_node, 0);
+ else
+ irq = platform_get_irq(pdev, 0);
if (irq <= 0) {
dev_err(&pdev->dev,
"Found HC with no IRQ. Check %s setup!\n",
@@ -215,6 +224,14 @@ static int __devinit ehci_orion_drv_probe(struct platform_device *pdev)
goto err1;
}
+ /*
+ * 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 = &ehci_orion_dma_mask;
+
if (!request_mem_region(res->start, resource_size(res),
ehci_orion_hc_driver.description)) {
dev_dbg(&pdev->dev, "controller already in use\n");
@@ -262,7 +279,12 @@ static int __devinit ehci_orion_drv_probe(struct platform_device *pdev)
/*
* setup Orion USB controller.
*/
- switch (pd->phy_version) {
+ if (pdev->dev.of_node)
+ phy_version = EHCI_PHY_NA;
+ else
+ phy_version = pd->phy_version;
+
+ switch (phy_version) {
case EHCI_PHY_NA: /* dont change USB phy settings */
break;
case EHCI_PHY_ORION:
@@ -317,9 +339,19 @@ static int __exit ehci_orion_drv_remove(struct platform_device *pdev)
MODULE_ALIAS("platform:orion-ehci");
+static const struct of_device_id ehci_orion_dt_ids[] __devinitdata = {
+ { .compatible = "marvell,orion-ehci", },
+ {},
+};
+MODULE_DEVICE_TABLE(of, ehci_orion_dt_ids);
+
static struct platform_driver ehci_orion_driver = {
.probe = ehci_orion_drv_probe,
.remove = __exit_p(ehci_orion_drv_remove),
.shutdown = usb_hcd_platform_shutdown,
- .driver.name = "orion-ehci",
+ .driver = {
+ .name = "orion-ehci",
+ .owner = THIS_MODULE,
+ .of_match_table = of_match_ptr(ehci_orion_dt_ids),
+ },
};
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