These changes are the raw update to linux-4.4.6-rt14. Kernel sources

are taken from kernel.org, and rt patch from the rt wiki download page.

During the rebasing, the following patch collided:

Force tick interrupt and get rid of softirq magic(I70131fb85).

Collisions have been removed because its logic was found on the
source already.

Change-Id: I7f57a4081d9deaa0d9ccfc41a6c8daccdee3b769
Signed-off-by: José Pekkarinen <jose.pekkarinen@nokia.com>

3 files changed, 334 insertions, 37 deletions

diff --git a/kernel/drivers/usb/common/Makefile b/kernel/drivers/usb/common/Makefile
index ca2f8bd0e..6bbb3ec17 100644
--- a/kernel/drivers/usb/common/Makefile
+++ b/kernel/drivers/usb/common/Makefile
@@ -7,3 +7,4 @@ usb-common-y			  += common.o
 usb-common-$(CONFIG_USB_LED_TRIG) += led.o
 
 obj-$(CONFIG_USB_OTG_FSM) += usb-otg-fsm.o
+obj-$(CONFIG_USB_ULPI_BUS)	+= ulpi.o
diff --git a/kernel/drivers/usb/common/common.c b/kernel/drivers/usb/common/common.c
index b530fd403..673d53038 100644
--- a/kernel/drivers/usb/common/common.c
+++ b/kernel/drivers/usb/common/common.c
@@ -60,6 +60,24 @@ const char *usb_speed_string(enum usb_device_speed speed)
 }
 EXPORT_SYMBOL_GPL(usb_speed_string);
 
+enum usb_device_speed usb_get_maximum_speed(struct device *dev)
+{
+	const char *maximum_speed;
+	int err;
+	int i;
+
+	err = device_property_read_string(dev, "maximum-speed", &maximum_speed);
+	if (err < 0)
+		return USB_SPEED_UNKNOWN;
+
+	for (i = 0; i < ARRAY_SIZE(speed_names); i++)
+		if (strcmp(maximum_speed, speed_names[i]) == 0)
+			return i;
+
+	return USB_SPEED_UNKNOWN;
+}
+EXPORT_SYMBOL_GPL(usb_get_maximum_speed);
+
 const char *usb_state_string(enum usb_device_state state)
 {
 	static const char *const names[] = {
@@ -81,7 +99,6 @@ const char *usb_state_string(enum usb_device_state state)
 }
 EXPORT_SYMBOL_GPL(usb_state_string);
 
-#ifdef CONFIG_OF
 static const char *const usb_dr_modes[] = {
 	[USB_DR_MODE_UNKNOWN]		= "",
 	[USB_DR_MODE_HOST]		= "host",
@@ -89,19 +106,12 @@ static const char *const usb_dr_modes[] = {
 	[USB_DR_MODE_OTG]		= "otg",
 };
 
-/**
- * of_usb_get_dr_mode - Get dual role mode for given device_node
- * @np:	Pointer to the given device_node
- *
- * The function gets phy interface string from property 'dr_mode',
- * and returns the correspondig enum usb_dr_mode
- */
-enum usb_dr_mode of_usb_get_dr_mode(struct device_node *np)
+enum usb_dr_mode usb_get_dr_mode(struct device *dev)
 {
 	const char *dr_mode;
 	int err, i;
 
-	err = of_property_read_string(np, "dr_mode", &dr_mode);
+	err = device_property_read_string(dev, "dr_mode", &dr_mode);
 	if (err < 0)
 		return USB_DR_MODE_UNKNOWN;
 
@@ -111,34 +121,9 @@ enum usb_dr_mode of_usb_get_dr_mode(struct device_node *np)
 
 	return USB_DR_MODE_UNKNOWN;
 }
-EXPORT_SYMBOL_GPL(of_usb_get_dr_mode);
-
-/**
- * of_usb_get_maximum_speed - Get maximum requested speed for a given USB
- * controller.
- * @np: Pointer to the given device_node
- *
- * The function gets the maximum speed string from property "maximum-speed",
- * and returns the corresponding enum usb_device_speed.
- */
-enum usb_device_speed of_usb_get_maximum_speed(struct device_node *np)
-{
-	const char *maximum_speed;
-	int err;
-	int i;
-
-	err = of_property_read_string(np, "maximum-speed", &maximum_speed);
-	if (err < 0)
-		return USB_SPEED_UNKNOWN;
-
-	for (i = 0; i < ARRAY_SIZE(speed_names); i++)
-		if (strcmp(maximum_speed, speed_names[i]) == 0)
-			return i;
-
-	return USB_SPEED_UNKNOWN;
-}
-EXPORT_SYMBOL_GPL(of_usb_get_maximum_speed);
+EXPORT_SYMBOL_GPL(usb_get_dr_mode);
 
+#ifdef CONFIG_OF
 /**
  * of_usb_host_tpl_support - to get if Targeted Peripheral List is supported
  * for given targeted hosts (non-PC hosts)
@@ -154,6 +139,62 @@ bool of_usb_host_tpl_support(struct device_node *np)
 	return false;
 }
 EXPORT_SYMBOL_GPL(of_usb_host_tpl_support);
+
+/**
+ * of_usb_update_otg_caps - to update usb otg capabilities according to
+ * the passed properties in DT.
+ * @np: Pointer to the given device_node
+ * @otg_caps: Pointer to the target usb_otg_caps to be set
+ *
+ * The function updates the otg capabilities
+ */
+int of_usb_update_otg_caps(struct device_node *np,
+			struct usb_otg_caps *otg_caps)
+{
+	u32 otg_rev;
+
+	if (!otg_caps)
+		return -EINVAL;
+
+	if (!of_property_read_u32(np, "otg-rev", &otg_rev)) {
+		switch (otg_rev) {
+		case 0x0100:
+		case 0x0120:
+		case 0x0130:
+		case 0x0200:
+			/* Choose the lesser one if it's already been set */
+			if (otg_caps->otg_rev)
+				otg_caps->otg_rev = min_t(u16, otg_rev,
+							otg_caps->otg_rev);
+			else
+				otg_caps->otg_rev = otg_rev;
+			break;
+		default:
+			pr_err("%s: unsupported otg-rev: 0x%x\n",
+						np->full_name, otg_rev);
+			return -EINVAL;
+		}
+	} else {
+		/*
+		 * otg-rev is mandatory for otg properties, if not passed
+		 * we set it to be 0 and assume it's a legacy otg device.
+		 * Non-dt platform can set it afterwards.
+		 */
+		otg_caps->otg_rev = 0;
+	}
+
+	if (of_find_property(np, "hnp-disable", NULL))
+		otg_caps->hnp_support = false;
+	if (of_find_property(np, "srp-disable", NULL))
+		otg_caps->srp_support = false;
+	if (of_find_property(np, "adp-disable", NULL) ||
+				(otg_caps->otg_rev < 0x0200))
+		otg_caps->adp_support = false;
+
+	return 0;
+}
+EXPORT_SYMBOL_GPL(of_usb_update_otg_caps);
+
 #endif
 
 MODULE_LICENSE("GPL");
diff --git a/kernel/drivers/usb/common/ulpi.c b/kernel/drivers/usb/common/ulpi.c
new file mode 100644
index 000000000..01c0c0477
--- /dev/null
+++ b/kernel/drivers/usb/common/ulpi.c
@@ -0,0 +1,255 @@
+/**
+ * ulpi.c - USB ULPI PHY bus
+ *
+ * Copyright (C) 2015 Intel Corporation
+ *
+ * Author: Heikki Krogerus <heikki.krogerus@linux.intel.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include <linux/ulpi/interface.h>
+#include <linux/ulpi/driver.h>
+#include <linux/ulpi/regs.h>
+#include <linux/module.h>
+#include <linux/slab.h>
+#include <linux/acpi.h>
+
+/* -------------------------------------------------------------------------- */
+
+int ulpi_read(struct ulpi *ulpi, u8 addr)
+{
+	return ulpi->ops->read(ulpi->ops, addr);
+}
+EXPORT_SYMBOL_GPL(ulpi_read);
+
+int ulpi_write(struct ulpi *ulpi, u8 addr, u8 val)
+{
+	return ulpi->ops->write(ulpi->ops, addr, val);
+}
+EXPORT_SYMBOL_GPL(ulpi_write);
+
+/* -------------------------------------------------------------------------- */
+
+static int ulpi_match(struct device *dev, struct device_driver *driver)
+{
+	struct ulpi_driver *drv = to_ulpi_driver(driver);
+	struct ulpi *ulpi = to_ulpi_dev(dev);
+	const struct ulpi_device_id *id;
+
+	for (id = drv->id_table; id->vendor; id++)
+		if (id->vendor == ulpi->id.vendor &&
+		    id->product == ulpi->id.product)
+			return 1;
+
+	return 0;
+}
+
+static int ulpi_uevent(struct device *dev, struct kobj_uevent_env *env)
+{
+	struct ulpi *ulpi = to_ulpi_dev(dev);
+
+	if (add_uevent_var(env, "MODALIAS=ulpi:v%04xp%04x",
+			   ulpi->id.vendor, ulpi->id.product))
+		return -ENOMEM;
+	return 0;
+}
+
+static int ulpi_probe(struct device *dev)
+{
+	struct ulpi_driver *drv = to_ulpi_driver(dev->driver);
+
+	return drv->probe(to_ulpi_dev(dev));
+}
+
+static int ulpi_remove(struct device *dev)
+{
+	struct ulpi_driver *drv = to_ulpi_driver(dev->driver);
+
+	if (drv->remove)
+		drv->remove(to_ulpi_dev(dev));
+
+	return 0;
+}
+
+static struct bus_type ulpi_bus = {
+	.name = "ulpi",
+	.match = ulpi_match,
+	.uevent = ulpi_uevent,
+	.probe = ulpi_probe,
+	.remove = ulpi_remove,
+};
+
+/* -------------------------------------------------------------------------- */
+
+static ssize_t modalias_show(struct device *dev, struct device_attribute *attr,
+			     char *buf)
+{
+	struct ulpi *ulpi = to_ulpi_dev(dev);
+
+	return sprintf(buf, "ulpi:v%04xp%04x\n",
+		       ulpi->id.vendor, ulpi->id.product);
+}
+static DEVICE_ATTR_RO(modalias);
+
+static struct attribute *ulpi_dev_attrs[] = {
+	&dev_attr_modalias.attr,
+	NULL
+};
+
+static struct attribute_group ulpi_dev_attr_group = {
+	.attrs = ulpi_dev_attrs,
+};
+
+static const struct attribute_group *ulpi_dev_attr_groups[] = {
+	&ulpi_dev_attr_group,
+	NULL
+};
+
+static void ulpi_dev_release(struct device *dev)
+{
+	kfree(to_ulpi_dev(dev));
+}
+
+static struct device_type ulpi_dev_type = {
+	.name = "ulpi_device",
+	.groups = ulpi_dev_attr_groups,
+	.release = ulpi_dev_release,
+};
+
+/* -------------------------------------------------------------------------- */
+
+/**
+ * ulpi_register_driver - register a driver with the ULPI bus
+ * @drv: driver being registered
+ *
+ * Registers a driver with the ULPI bus.
+ */
+int ulpi_register_driver(struct ulpi_driver *drv)
+{
+	if (!drv->probe)
+		return -EINVAL;
+
+	drv->driver.bus = &ulpi_bus;
+
+	return driver_register(&drv->driver);
+}
+EXPORT_SYMBOL_GPL(ulpi_register_driver);
+
+/**
+ * ulpi_unregister_driver - unregister a driver with the ULPI bus
+ * @drv: driver to unregister
+ *
+ * Unregisters a driver with the ULPI bus.
+ */
+void ulpi_unregister_driver(struct ulpi_driver *drv)
+{
+	driver_unregister(&drv->driver);
+}
+EXPORT_SYMBOL_GPL(ulpi_unregister_driver);
+
+/* -------------------------------------------------------------------------- */
+
+static int ulpi_register(struct device *dev, struct ulpi *ulpi)
+{
+	int ret;
+
+	/* Test the interface */
+	ret = ulpi_write(ulpi, ULPI_SCRATCH, 0xaa);
+	if (ret < 0)
+		return ret;
+
+	ret = ulpi_read(ulpi, ULPI_SCRATCH);
+	if (ret < 0)
+		return ret;
+
+	if (ret != 0xaa)
+		return -ENODEV;
+
+	ulpi->id.vendor = ulpi_read(ulpi, ULPI_VENDOR_ID_LOW);
+	ulpi->id.vendor |= ulpi_read(ulpi, ULPI_VENDOR_ID_HIGH) << 8;
+
+	ulpi->id.product = ulpi_read(ulpi, ULPI_PRODUCT_ID_LOW);
+	ulpi->id.product |= ulpi_read(ulpi, ULPI_PRODUCT_ID_HIGH) << 8;
+
+	ulpi->dev.parent = dev;
+	ulpi->dev.bus = &ulpi_bus;
+	ulpi->dev.type = &ulpi_dev_type;
+	dev_set_name(&ulpi->dev, "%s.ulpi", dev_name(dev));
+
+	ACPI_COMPANION_SET(&ulpi->dev, ACPI_COMPANION(dev));
+
+	request_module("ulpi:v%04xp%04x", ulpi->id.vendor, ulpi->id.product);
+
+	ret = device_register(&ulpi->dev);
+	if (ret)
+		return ret;
+
+	dev_dbg(&ulpi->dev, "registered ULPI PHY: vendor %04x, product %04x\n",
+		ulpi->id.vendor, ulpi->id.product);
+
+	return 0;
+}
+
+/**
+ * ulpi_register_interface - instantiate new ULPI device
+ * @dev: USB controller's device interface
+ * @ops: ULPI register access
+ *
+ * Allocates and registers a ULPI device and an interface for it. Called from
+ * the USB controller that provides the ULPI interface.
+ */
+struct ulpi *ulpi_register_interface(struct device *dev, struct ulpi_ops *ops)
+{
+	struct ulpi *ulpi;
+	int ret;
+
+	ulpi = kzalloc(sizeof(*ulpi), GFP_KERNEL);
+	if (!ulpi)
+		return ERR_PTR(-ENOMEM);
+
+	ulpi->ops = ops;
+	ops->dev = dev;
+
+	ret = ulpi_register(dev, ulpi);
+	if (ret) {
+		kfree(ulpi);
+		return ERR_PTR(ret);
+	}
+
+	return ulpi;
+}
+EXPORT_SYMBOL_GPL(ulpi_register_interface);
+
+/**
+ * ulpi_unregister_interface - unregister ULPI interface
+ * @intrf: struct ulpi_interface
+ *
+ * Unregisters a ULPI device and it's interface that was created with
+ * ulpi_create_interface().
+ */
+void ulpi_unregister_interface(struct ulpi *ulpi)
+{
+	device_unregister(&ulpi->dev);
+}
+EXPORT_SYMBOL_GPL(ulpi_unregister_interface);
+
+/* -------------------------------------------------------------------------- */
+
+static int __init ulpi_init(void)
+{
+	return bus_register(&ulpi_bus);
+}
+subsys_initcall(ulpi_init);
+
+static void __exit ulpi_exit(void)
+{
+	bus_unregister(&ulpi_bus);
+}
+module_exit(ulpi_exit);
+
+MODULE_AUTHOR("Intel Corporation");
+MODULE_LICENSE("GPL v2");
+MODULE_DESCRIPTION("USB ULPI PHY bus");