usb: usb: dsps: update code according to the binding document

This relfects the code and dts requires changes due to recent .dts
binding updates:
- use mg prefix for the Metor Graphics specific attributes
- use power in mA not in mA/2 as specifed in the USB2.0 specification
- remove the child node for USB. This is driver specific on won't be
  reflected in the device tree
- use the "mentor" prefix instead of "mg".
- use "dr_mode" istead of "mg,port-mode" for the port mode. The former
  is used by a few other drivers.

Cc: Rob Herring <rob.herring@calxeda.com>
Cc: Pawel Moll <pawel.moll@arm.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Stephen Warren <swarren@wwwdotorg.org>
Cc: Ian Campbell <ian.campbell@citrix.com>
Cc: devicetree@vger.kernel.org
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Felipe Balbi <balbi@ti.com>

arch/arm/boot/dts/am335x-bone.dts

@@ -127,7 +127,7 @@
 				status = "okay";
 			};
 
-			phy@47401300 {
+			usb-phy@47401300 {
 				status = "okay";
 			};
 

arch/arm/boot/dts/am335x-evm.dts

@@ -178,11 +178,11 @@
 				status = "okay";
 			};
 
-			phy@47401300 {
+			usb-phy@47401300 {
 				status = "okay";
 			};
 
-			phy@47401b00 {
+			usb-phy@47401b00 {
 				status = "okay";
 			};
 
@@ -194,7 +194,7 @@
 				status = "okay";
 			};
 
-			dma@07402000  {
+			dma-controller@07402000  {
 				status = "okay";
 			};
 		};

arch/arm/boot/dts/am335x-evmsk.dts

@@ -214,7 +214,7 @@
 				status = "okay";
 			};
 
-			phy@47401300 {
+			usb-phy@47401300 {
 				status = "okay";
 			};
 

arch/arm/boot/dts/am33xx.dtsi

@@ -354,7 +354,7 @@
 				status = "disabled";
 			};
 
-			usb0_phy: phy@47401300 {
+			usb0_phy: usb-phy@47401300 {
 				compatible = "ti,am335x-usb-phy";
 				reg = <0x47401300 0x100>;
 				reg-names = "phy";
@@ -364,25 +364,19 @@
 
 			usb0: usb@47401000 {
 				compatible = "ti,musb-am33xx";
-				ranges;
-				#address-cells = <1>;
-				#size-cells = <1>;
-				reg = <0x47401000 0x200>;
-				reg-names = "control";
 				status = "disabled";
-
-				musb0: usb@47401400 {
-					compatible = "mg,musbmhdrc";
-					reg = <0x47401400 0x400>;
-					reg-names = "mc";
-					interrupts = <18>;
-					interrupt-names = "mc";
-					multipoint = <1>;
-					num-eps = <16>;
-					ram-bits = <12>;
-					port-mode = <3>;
-					power = <250>;
-					phys = <&usb0_phy>;
+				reg = <0x47401400 0x400
+					0x47401000 0x200>;
+				reg-names = "mc", "control";
+
+				interrupts = <18>;
+				interrupt-names = "mc";
+				dr_mode = "otg";
+				mentor,multipoint = <1>;
+				mentor,num-eps = <16>;
+				mentor,ram-bits = <12>;
+				mentor,power = <500>;
+				phys = <&usb0_phy>;
 
 				dmas = <&cppi41dma  0 0 &cppi41dma  1 0
 					&cppi41dma  2 0 &cppi41dma  3 0
@@ -406,10 +400,9 @@
 					"tx1", "tx2", "tx3", "tx4", "tx5", "tx6", "tx7",
 					"tx8", "tx9", "tx10", "tx11", "tx12", "tx13",
 					"tx14", "tx15";
-				};
 			};
 
-			usb1_phy: phy@47401b00 {
+			usb1_phy: usb-phy@47401b00 {
 				compatible = "ti,am335x-usb-phy";
 				reg = <0x47401b00 0x100>;
 				reg-names = "phy";
@@ -419,25 +412,18 @@
 
 			usb1: usb@47401800 {
 				compatible = "ti,musb-am33xx";
-				ranges;
-				#address-cells = <1>;
-				#size-cells = <1>;
-				reg = <0x47401800 0x200>;
-				reg-names = "control";
 				status = "disabled";
-
-				musb1: usb@47401c00 {
-					compatible = "mg,musbmhdrc";
-					reg = <0x47401c00 0x400>;
-					reg-names = "mc";
-					interrupts = <19>;
-					interrupt-names = "mc";
-					multipoint = <1>;
-					num-eps = <16>;
-					ram-bits = <12>;
-					port-mode = <3>;
-					power = <250>;
-					phys = <&usb1_phy>;
+				reg = <0x47401c00 0x400
+					0x47401800 0x200>;
+				reg-names = "mc", "control";
+				interrupts = <19>;
+				interrupt-names = "mc";
+				dr_mode = "otg";
+				mentor,multipoint = <1>;
+				mentor,num-eps = <16>;
+				mentor,ram-bits = <12>;
+				mentor,power = <500>;
+				phys = <&usb1_phy>;
 
 				dmas = <&cppi41dma 15 0 &cppi41dma 16 0
 					&cppi41dma 17 0 &cppi41dma 18 0
@@ -461,10 +447,9 @@
 					"tx1", "tx2", "tx3", "tx4", "tx5", "tx6", "tx7",
 					"tx8", "tx9", "tx10", "tx11", "tx12", "tx13",
 					"tx14", "tx15";
-				};
 			};
 
-			cppi41dma: dma@07402000 {
+			cppi41dma: dma-controller@07402000 {
 				compatible = "ti,am3359-cppi41";
 				reg =  <0x47400000 0x1000
 					0x47402000 0x1000

drivers/usb/musb/musb_dsps.c

@@ -44,6 +44,7 @@
 #include <linux/of_device.h>
 #include <linux/of_address.h>
 #include <linux/of_irq.h>
+#include <linux/usb/of.h>
 
 #include "musb_core.h"
 
@@ -425,35 +426,51 @@ static int get_int_prop(struct device_node *dn, const char *s)
 	return val;
 }
 
+static int get_musb_port_mode(struct device *dev)
+{
+	enum usb_dr_mode mode;
+
+	mode = of_usb_get_dr_mode(dev->of_node);
+	switch (mode) {
+	case USB_DR_MODE_HOST:
+		return MUSB_PORT_MODE_HOST;
+
+	case USB_DR_MODE_PERIPHERAL:
+		return MUSB_PORT_MODE_GADGET;
+
+	case USB_DR_MODE_UNKNOWN:
+	case USB_DR_MODE_OTG:
+	default:
+		return MUSB_PORT_MODE_DUAL_ROLE;
+	};
+}
+
 static int dsps_create_musb_pdev(struct dsps_glue *glue,
 		struct platform_device *parent)
 {
 	struct musb_hdrc_platform_data pdata;
 	struct resource	resources[2];
+	struct resource	*res;
 	struct device *dev = &parent->dev;
 	struct musb_hdrc_config	*config;
 	struct platform_device *musb;
 	struct device_node *dn = parent->dev.of_node;
-	struct device_node *child_node;
 	int ret;
 
-	child_node = of_get_child_by_name(dn, "usb");
-	if (!child_node)
-		return -EINVAL;
-
 	memset(resources, 0, sizeof(resources));
-	ret = of_address_to_resource(child_node, 0, &resources[0]);
-	if (ret) {
+	res = platform_get_resource_byname(parent, IORESOURCE_MEM, "mc");
+	if (!res) {
 		dev_err(dev, "failed to get memory.\n");
-		return ret;
+		return -EINVAL;
 	}
+	resources[0] = *res;
 
-	ret = of_irq_to_resource(child_node, 0, &resources[1]);
-	if (ret == 0) {
+	res = platform_get_resource_byname(parent, IORESOURCE_IRQ, "mc");
+	if (!res) {
 		dev_err(dev, "failed to get irq.\n");
-		ret = -EINVAL;
-		return ret;
+		return -EINVAL;
 	}
+	resources[1] = *res;
 
 	/* allocate the child platform device */
 	musb = platform_device_alloc("musb-hdrc", PLATFORM_DEVID_AUTO);
@@ -465,7 +482,7 @@ static int dsps_create_musb_pdev(struct dsps_glue *glue,
 	musb->dev.parent		= dev;
 	musb->dev.dma_mask		= &musb_dmamask;
 	musb->dev.coherent_dma_mask	= musb_dmamask;
-	musb->dev.of_node		= of_node_get(child_node);
+	musb->dev.of_node		= of_node_get(dn);
 
 	glue->musb = musb;
 
@@ -485,11 +502,12 @@ static int dsps_create_musb_pdev(struct dsps_glue *glue,
 	pdata.config = config;
 	pdata.platform_ops = &dsps_ops;
 
-	config->num_eps = get_int_prop(child_node, "num-eps");
-	config->ram_bits = get_int_prop(child_node, "ram-bits");
-	pdata.mode = get_int_prop(child_node, "port-mode");
-	pdata.power = get_int_prop(child_node, "power");
-	config->multipoint = of_property_read_bool(child_node, "multipoint");
+	config->num_eps = get_int_prop(dn, "mentor,num-eps");
+	config->ram_bits = get_int_prop(dn, "mentor,ram-bits");
+	pdata.mode = get_musb_port_mode(dev);
+	/* DT keeps this entry in mA, musb expects it as per USB spec */
+	pdata.power = get_int_prop(dn, "mentor,power") / 2;
+	config->multipoint = of_property_read_bool(dn, "mentor,multipoint");
 
 	ret = platform_device_add_data(musb, &pdata, sizeof(pdata));
 	if (ret) {