Re: [PATCH 1/4] ARM: at91: usb ohci add dt support

Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj-sclMFOaUSTBWk0Htik3J/w@public.gmane.org>
Cc: Nicolas Ferre <redacted>
Cc: devicetree-discuss-uLR06cmDAlY/bJ5BZ2RsiQ@public.gmane.org
Cc: linux-usb-u79uwXL29TY76Z2rM5mHXA@public.gmane.org
---
Hi Greg,

	I you don't mind I'll apply this via at91 tree as it's part a DT USB
	patch series

Best Regards,
J.
 .../devicetree/bindings/usb/atmel-usb.txt          |   19 ++++
 drivers/usb/host/ohci-at91.c                       |  101 +++++++++++++++++++-
 2 files changed, 119 insertions(+), 1 deletions(-)
 create mode 100644 Documentation/devicetree/bindings/usb/atmel-usb.txt

diff --git a/Documentation/devicetree/bindings/usb/atmel-usb.txt b/Documentation/devicetree/bindings/usb/atmel-usb.txt
new file mode 100644
index 0000000..6c7f728
--- /dev/null
+++ b/Documentation/devicetree/bindings/usb/atmel-usb.txt

@@ -0,0 +1,19 @@
+Atmel SOC USB controllers
+
+OHCI
+
+Required properties:
+ - compatible: Should be "atmel,at91rm9200-ohci" for USB controllers
+   used in host mode.
+ - num-ports: Number of ports.
+ - atmel,vbus-gpio: If present, specifies a gpio that needs to be
+   activated for the bus to be powered.
+ - atmel,oc-gpio: If present, specifies a gpio that needs to be
+   activated for the overcurrent detection.
+
+usb0: ohci@00500000 {
+	compatible = "atmel,at91rm9200-ohci", "usb-ohci";
+	reg = <0x00500000 0x100000>;
+	interrupts = <20 4>;
+	num-ports = <2>;
+};

diff --git a/drivers/usb/host/ohci-at91.c b/drivers/usb/host/ohci-at91.c
index 8e855eb..718f138 100644
--- a/drivers/usb/host/ohci-at91.c
+++ b/drivers/usb/host/ohci-at91.c

@@ -14,6 +14,8 @@
 
 #include <linux/clk.h>
 #include <linux/platform_device.h>
+#include <linux/of_platform.h>
+#include <linux/of_gpio.h>
 
 #include <mach/hardware.h>
 #include <asm/gpio.h>

@@ -477,13 +479,109 @@ static irqreturn_t ohci_hcd_at91_overcurrent_irq(int irq, void *data)
 	return IRQ_HANDLED;
 }
 
+#ifdef CONFIG_OF
+static const struct of_device_id at91_ohci_dt_ids[] = {
+	{ .compatible = "atmel,at91rm9200-ohci" },
+	{ /* sentinel */ }
+};
+
+MODULE_DEVICE_TABLE(of, at91_ohci_dt_ids);
+
+static u64 at91_ohci_dma_mask = DMA_BIT_MASK(32);
+
+static int __devinit ohci_at91_of_init(struct platform_device *pdev)
+{
+	struct device_node *np = pdev->dev.of_node;
+	int i, ret, gpio;
+	enum of_gpio_flags flags;
+	struct at91_usbh_data	*pdata;
+	u32 ports;
+
+	if (!np)
+		return 0;
+
+	/* 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 = &at91_ohci_dma_mask;
+
+	pdata = kzalloc(sizeof(struct at91_usbh_data), GFP_KERNEL);