diff options
Diffstat (limited to 'target/linux/generic/pending-4.4/082-0001-USB-core-let-USB-device-know-device-node.patch')
| -rw-r--r-- | target/linux/generic/pending-4.4/082-0001-USB-core-let-USB-device-know-device-node.patch | 179 |
1 files changed, 0 insertions, 179 deletions
diff --git a/target/linux/generic/pending-4.4/082-0001-USB-core-let-USB-device-know-device-node.patch b/target/linux/generic/pending-4.4/082-0001-USB-core-let-USB-device-know-device-node.patch deleted file mode 100644 index 901cdf7..0000000 --- a/target/linux/generic/pending-4.4/082-0001-USB-core-let-USB-device-know-device-node.patch +++ /dev/null @@ -1,179 +0,0 @@ -From 69bec725985324e79b1c47ea287815ac4ddb0521 Mon Sep 17 00:00:00 2001 -From: Peter Chen <peter.chen@freescale.com> -Date: Fri, 19 Feb 2016 17:26:15 +0800 -Subject: [PATCH] USB: core: let USB device know device node - -Although most of USB devices are hot-plug's, there are still some devices -are hard wired on the board, eg, for HSIC and SSIC interface USB devices. -If these kinds of USB devices are multiple functions, and they can supply -other interfaces like i2c, gpios for other devices, we may need to -describe these at device tree. - -In this commit, it uses "reg" in dts as physical port number to match -the phyiscal port number decided by USB core, if they are the same, -then the device node is for the device we are creating for USB core. - -Signed-off-by: Peter Chen <peter.chen@freescale.com> -Acked-by: Philipp Zabel <p.zabel@pengutronix.de> -Acked-by: Alan Stern <stern@rowland.harvard.edu> -Acked-by: Rob Herring <robh@kernel.org> -Acked-by: Arnd Bergmann <arnd@arndb.de> -Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> ---- - .../devicetree/bindings/usb/usb-device.txt | 28 +++++++++++++ - drivers/usb/core/Makefile | 2 +- - drivers/usb/core/of.c | 47 ++++++++++++++++++++++ - drivers/usb/core/usb.c | 10 +++++ - include/linux/usb/of.h | 7 ++++ - 5 files changed, 93 insertions(+), 1 deletion(-) - create mode 100644 Documentation/devicetree/bindings/usb/usb-device.txt - create mode 100644 drivers/usb/core/of.c - ---- /dev/null -+++ b/Documentation/devicetree/bindings/usb/usb-device.txt -@@ -0,0 +1,28 @@ -+Generic USB Device Properties -+ -+Usually, we only use device tree for hard wired USB device. -+The reference binding doc is from: -+http://www.firmware.org/1275/bindings/usb/usb-1_0.ps -+ -+Required properties: -+- compatible: usbVID,PID. The textual representation of VID, PID shall -+ be in lower case hexadecimal with leading zeroes suppressed. The -+ other compatible strings from the above standard binding could also -+ be used, but a device adhering to this binding may leave out all except -+ for usbVID,PID. -+- reg: the port number which this device is connecting to, the range -+ is 1-31. -+ -+Example: -+ -+&usb1 { -+ status = "okay"; -+ -+ #address-cells = <1>; -+ #size-cells = <0>; -+ -+ hub: genesys@1 { -+ compatible = "usb5e3,608"; -+ reg = <1>; -+ }; -+} ---- a/drivers/usb/core/Makefile -+++ b/drivers/usb/core/Makefile -@@ -5,7 +5,7 @@ - usbcore-y := usb.o hub.o hcd.o urb.o message.o driver.o - usbcore-y += config.o file.o buffer.o sysfs.o endpoint.o - usbcore-y += devio.o notify.o generic.o quirks.o devices.o --usbcore-y += port.o -+usbcore-y += port.o of.o - - usbcore-$(CONFIG_PCI) += hcd-pci.o - usbcore-$(CONFIG_ACPI) += usb-acpi.o ---- /dev/null -+++ b/drivers/usb/core/of.c -@@ -0,0 +1,47 @@ -+/* -+ * of.c The helpers for hcd device tree support -+ * -+ * Copyright (C) 2016 Freescale Semiconductor, Inc. -+ * Author: Peter Chen <peter.chen@freescale.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 of -+ * the License as published by the Free Software Foundation. -+ * -+ * This program is distributed in the hope that it will be useful, -+ * but WITHOUT ANY WARRANTY; without even the implied warranty of -+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the -+ * GNU General Public License for more details. -+ * -+ * You should have received a copy of the GNU General Public License -+ * along with this program. If not, see <http://www.gnu.org/licenses/>. -+ */ -+ -+#include <linux/of.h> -+ -+/** -+ * usb_of_get_child_node - Find the device node match port number -+ * @parent: the parent device node -+ * @portnum: the port number which device is connecting -+ * -+ * Find the node from device tree according to its port number. -+ * -+ * Return: On success, a pointer to the device node, %NULL on failure. -+ */ -+struct device_node *usb_of_get_child_node(struct device_node *parent, -+ int portnum) -+{ -+ struct device_node *node; -+ u32 port; -+ -+ for_each_child_of_node(parent, node) { -+ if (!of_property_read_u32(node, "reg", &port)) { -+ if (port == portnum) -+ return node; -+ } -+ } -+ -+ return NULL; -+} -+EXPORT_SYMBOL_GPL(usb_of_get_child_node); -+ ---- a/drivers/usb/core/usb.c -+++ b/drivers/usb/core/usb.c -@@ -36,6 +36,7 @@ - #include <linux/mutex.h> - #include <linux/workqueue.h> - #include <linux/debugfs.h> -+#include <linux/usb/of.h> - - #include <asm/io.h> - #include <linux/scatterlist.h> -@@ -469,6 +470,7 @@ struct usb_device *usb_alloc_dev(struct - dev->route = 0; - - dev->dev.parent = bus->controller; -+ dev->dev.of_node = bus->controller->of_node; - dev_set_name(&dev->dev, "usb%d", bus->busnum); - root_hub = 1; - } else { -@@ -493,6 +495,14 @@ struct usb_device *usb_alloc_dev(struct - dev->dev.parent = &parent->dev; - dev_set_name(&dev->dev, "%d-%s", bus->busnum, dev->devpath); - -+ if (!parent->parent) { -+ /* device under root hub's port */ -+ port1 = usb_hcd_find_raw_port_number(usb_hcd, -+ port1); -+ } -+ dev->dev.of_node = usb_of_get_child_node(parent->dev.of_node, -+ port1); -+ - /* hub driver sets up TT records */ - } - ---- a/include/linux/usb/of.h -+++ b/include/linux/usb/of.h -@@ -15,6 +15,8 @@ - bool of_usb_host_tpl_support(struct device_node *np); - int of_usb_update_otg_caps(struct device_node *np, - struct usb_otg_caps *otg_caps); -+struct device_node *usb_of_get_child_node(struct device_node *parent, -+ int portnum); - #else - static inline bool of_usb_host_tpl_support(struct device_node *np) - { -@@ -25,6 +27,11 @@ static inline int of_usb_update_otg_caps - { - return 0; - } -+static inline struct device_node *usb_of_get_child_node -+ (struct device_node *parent, int portnum) -+{ -+ return NULL; -+} - #endif - - #if IS_ENABLED(CONFIG_OF) && IS_ENABLED(CONFIG_USB_SUPPORT) |