ralink: update patches

Signed-off-by: John Crispin <blogic@openwrt.org>

SVN-Revision: 37016

1 files changed, 554 insertions, 0 deletions

diff --git a/target/linux/ramips/patches-3.9/0154-reset-Add-reset-controller-API.patch b/target/linux/ramips/patches-3.9/0154-reset-Add-reset-controller-API.patch
new file mode 100644
index 0000000000..900f0a2e46
--- /dev/null
+++ b/target/linux/ramips/patches-3.9/0154-reset-Add-reset-controller-API.patch
@@ -0,0 +1,554 @@
+From d6cfbdfa001891894efe078a49ad82ac8a932dbb Mon Sep 17 00:00:00 2001
+From: John Crispin <blogic@openwrt.org>
+Date: Mon, 20 May 2013 15:42:01 +0200
+Subject: [PATCH 154/164] reset: Add reset controller API
+
+backport from v3.10-rc1
+61fc41317666be400802ac793f47de816ef7bd57
+6034bb22d8387708075c083385e5d2e1072a4f33
+4e11f848c65b1c87782cb232a6e3b47a9d4c1f98
+
+This adds a simple API for devices to request being reset
+by separate reset controller hardware and implements the
+reset signal device tree binding.
+
+Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>
+Reviewed-by: Stephen Warren <swarren@nvidia.com>
+Reviewed-by: Shawn Guo <shawn.guo@linaro.org>
+Reviewed-by: Marek Vasut <marex@denx.de>
+Reviewed-by: Pavel Machek <pavel@ucw.cz>
+---
+ Documentation/devicetree/bindings/reset/reset.txt |   75 ++++++
+ drivers/Kconfig                                   |    2 +
+ drivers/Makefile                                  |    3 +
+ drivers/reset/Kconfig                             |   13 +
+ drivers/reset/Makefile                            |    1 +
+ drivers/reset/core.c                              |  297 +++++++++++++++++++++
+ include/linux/reset-controller.h                  |   51 ++++
+ include/linux/reset.h                             |   17 ++
+ 8 files changed, 459 insertions(+)
+ create mode 100644 Documentation/devicetree/bindings/reset/reset.txt
+ create mode 100644 drivers/reset/Kconfig
+ create mode 100644 drivers/reset/Makefile
+ create mode 100644 drivers/reset/core.c
+ create mode 100644 include/linux/reset-controller.h
+ create mode 100644 include/linux/reset.h
+
+diff --git a/Documentation/devicetree/bindings/reset/reset.txt b/Documentation/devicetree/bindings/reset/reset.txt
+new file mode 100644
+index 0000000..31db6ff
+--- /dev/null
++++ b/Documentation/devicetree/bindings/reset/reset.txt
+@@ -0,0 +1,75 @@
++= Reset Signal Device Tree Bindings =
++
++This binding is intended to represent the hardware reset signals present
++internally in most IC (SoC, FPGA, ...) designs. Reset signals for whole
++standalone chips are most likely better represented as GPIOs, although there
++are likely to be exceptions to this rule.
++
++Hardware blocks typically receive a reset signal. This signal is generated by
++a reset provider (e.g. power management or clock module) and received by a
++reset consumer (the module being reset, or a module managing when a sub-
++ordinate module is reset). This binding exists to represent the provider and
++consumer, and provide a way to couple the two together.
++
++A reset signal is represented by the phandle of the provider, plus a reset
++specifier - a list of DT cells that represents the reset signal within the
++provider. The length (number of cells) and semantics of the reset specifier
++are dictated by the binding of the reset provider, although common schemes
++are described below.
++
++A word on where to place reset signal consumers in device tree: It is possible
++in hardware for a reset signal to affect multiple logically separate HW blocks
++at once. In this case, it would be unwise to represent this reset signal in
++the DT node of each affected HW block, since if activated, an unrelated block
++may be reset. Instead, reset signals should be represented in the DT node
++where it makes most sense to control it; this may be a bus node if all
++children of the bus are affected by the reset signal, or an individual HW
++block node for dedicated reset signals. The intent of this binding is to give
++appropriate software access to the reset signals in order to manage the HW,
++rather than to slavishly enumerate the reset signal that affects each HW
++block.
++
++= Reset providers =
++
++Required properties:
++#reset-cells:	Number of cells in a reset specifier; Typically 0 for nodes
++		with a single reset output and 1 for nodes with multiple
++		reset outputs.
++
++For example:
++
++	rst: reset-controller {
++		#reset-cells = <1>;
++	};
++
++= Reset consumers =
++
++Required properties:
++resets:		List of phandle and reset specifier pairs, one pair
++		for each reset signal that affects the device, or that the
++		device manages. Note: if the reset provider specifies '0' for
++		#reset-cells, then only the phandle portion of the pair will
++		appear.
++
++Optional properties:
++reset-names:	List of reset signal name strings sorted in the same order as
++		the resets property. Consumers drivers will use reset-names to
++		match reset signal names with reset specifiers.
++
++For example:
++
++	device {
++		resets = <&rst 20>;
++		reset-names = "reset";
++	};
++
++This represents a device with a single reset signal named "reset".
++
++	bus {
++		resets = <&rst 10> <&rst 11> <&rst 12> <&rst 11>;
++		reset-names = "i2s1", "i2s2", "dma", "mixer";
++	};
++
++This represents a bus that controls the reset signal of each of four sub-
++ordinate devices. Consider for example a bus that fails to operate unless no
++child device has reset asserted.
+diff --git a/drivers/Kconfig b/drivers/Kconfig
+index 202fa6d..847f8e3 100644
+--- a/drivers/Kconfig
++++ b/drivers/Kconfig
+@@ -162,4 +162,6 @@ source "drivers/irqchip/Kconfig"
+ 
+ source "drivers/ipack/Kconfig"
+ 
++source "drivers/reset/Kconfig"
++
+ endmenu
+diff --git a/drivers/Makefile b/drivers/Makefile
+index dce39a9..1a64c4c 100644
+--- a/drivers/Makefile
++++ b/drivers/Makefile
+@@ -37,6 +37,9 @@ obj-$(CONFIG_XEN)		+= xen/
+ # regulators early, since some subsystems rely on them to initialize
+ obj-$(CONFIG_REGULATOR)		+= regulator/
+ 
++# reset controllers early, since gpu drivers might rely on them to initialize
++obj-$(CONFIG_RESET_CONTROLLER)	+= reset/
++
+ # tty/ comes before char/ so that the VT console is the boot-time
+ # default.
+ obj-y				+= tty/
+diff --git a/drivers/reset/Kconfig b/drivers/reset/Kconfig
+new file mode 100644
+index 0000000..c9d04f7
+--- /dev/null
++++ b/drivers/reset/Kconfig
+@@ -0,0 +1,13 @@
++config ARCH_HAS_RESET_CONTROLLER
++	bool
++
++menuconfig RESET_CONTROLLER
++	bool "Reset Controller Support"
++	default y if ARCH_HAS_RESET_CONTROLLER
++	help
++	  Generic Reset Controller support.
++
++	  This framework is designed to abstract reset handling of devices
++	  via GPIOs or SoC-internal reset controller modules.
++
++	  If unsure, say no.
+diff --git a/drivers/reset/Makefile b/drivers/reset/Makefile
+new file mode 100644
+index 0000000..1e2d83f
+--- /dev/null
++++ b/drivers/reset/Makefile
+@@ -0,0 +1 @@
++obj-$(CONFIG_RESET_CONTROLLER) += core.o
+diff --git a/drivers/reset/core.c b/drivers/reset/core.c
+new file mode 100644
+index 0000000..d1b6089
+--- /dev/null
++++ b/drivers/reset/core.c
+@@ -0,0 +1,297 @@
++/*
++ * Reset Controller framework
++ *
++ * Copyright 2013 Philipp Zabel, Pengutronix
++ *
++ * This program is free software; you can redistribute it and/or modify
++ * it under the terms of the GNU General Public License as published by
++ * the Free Software Foundation; either version 2 of the License, or
++ * (at your option) any later version.
++ */
++#include <linux/device.h>
++#include <linux/err.h>
++#include <linux/export.h>
++#include <linux/kernel.h>
++#include <linux/module.h>
++#include <linux/of.h>
++#include <linux/reset.h>
++#include <linux/reset-controller.h>
++#include <linux/slab.h>
++
++static DEFINE_MUTEX(reset_controller_list_mutex);
++static LIST_HEAD(reset_controller_list);
++
++/**
++ * struct reset_control - a reset control
++ * @rcdev: a pointer to the reset controller device
++ *         this reset control belongs to
++ * @id: ID of the reset controller in the reset
++ *      controller device
++ */
++struct reset_control {
++	struct reset_controller_dev *rcdev;
++	struct device *dev;
++	unsigned int id;
++};
++
++/**
++ * of_reset_simple_xlate - translate reset_spec to the reset line number
++ * @rcdev: a pointer to the reset controller device
++ * @reset_spec: reset line specifier as found in the device tree
++ * @flags: a flags pointer to fill in (optional)
++ *
++ * This simple translation function should be used for reset controllers
++ * with 1:1 mapping, where reset lines can be indexed by number without gaps.
++ */
++int of_reset_simple_xlate(struct reset_controller_dev *rcdev,
++			  const struct of_phandle_args *reset_spec)
++{
++	if (WARN_ON(reset_spec->args_count != rcdev->of_reset_n_cells))
++		return -EINVAL;
++
++	if (reset_spec->args[0] >= rcdev->nr_resets)
++		return -EINVAL;
++
++	return reset_spec->args[0];
++}
++EXPORT_SYMBOL_GPL(of_reset_simple_xlate);
++
++/**
++ * reset_controller_register - register a reset controller device
++ * @rcdev: a pointer to the initialized reset controller device
++ */
++int reset_controller_register(struct reset_controller_dev *rcdev)
++{
++	if (!rcdev->of_xlate) {
++		rcdev->of_reset_n_cells = 1;
++		rcdev->of_xlate = of_reset_simple_xlate;
++	}
++
++	mutex_lock(&reset_controller_list_mutex);
++	list_add(&rcdev->list, &reset_controller_list);
++	mutex_unlock(&reset_controller_list_mutex);
++
++	return 0;
++}
++EXPORT_SYMBOL_GPL(reset_controller_register);
++
++/**
++ * reset_controller_unregister - unregister a reset controller device
++ * @rcdev: a pointer to the reset controller device
++ */
++void reset_controller_unregister(struct reset_controller_dev *rcdev)
++{
++	mutex_lock(&reset_controller_list_mutex);
++	list_del(&rcdev->list);
++	mutex_unlock(&reset_controller_list_mutex);
++}
++EXPORT_SYMBOL_GPL(reset_controller_unregister);
++
++/**
++ * reset_control_reset - reset the controlled device
++ * @rstc: reset controller
++ */
++int reset_control_reset(struct reset_control *rstc)
++{
++	if (rstc->rcdev->ops->reset)
++		return rstc->rcdev->ops->reset(rstc->rcdev, rstc->id);
++
++	return -ENOSYS;
++}
++EXPORT_SYMBOL_GPL(reset_control_reset);
++
++/**
++ * reset_control_assert - asserts the reset line
++ * @rstc: reset controller
++ */
++int reset_control_assert(struct reset_control *rstc)
++{
++	if (rstc->rcdev->ops->assert)
++		return rstc->rcdev->ops->assert(rstc->rcdev, rstc->id);
++
++	return -ENOSYS;
++}
++EXPORT_SYMBOL_GPL(reset_control_assert);
++
++/**
++ * reset_control_deassert - deasserts the reset line
++ * @rstc: reset controller
++ */
++int reset_control_deassert(struct reset_control *rstc)
++{
++	if (rstc->rcdev->ops->deassert)
++		return rstc->rcdev->ops->deassert(rstc->rcdev, rstc->id);
++
++	return -ENOSYS;
++}
++EXPORT_SYMBOL_GPL(reset_control_deassert);
++
++/**
++ * reset_control_get - Lookup and obtain a reference to a reset controller.
++ * @dev: device to be reset by the controller
++ * @id: reset line name
++ *
++ * Returns a struct reset_control or IS_ERR() condition containing errno.
++ *
++ * Use of id names is optional.
++ */
++struct reset_control *reset_control_get(struct device *dev, const char *id)
++{
++	struct reset_control *rstc = ERR_PTR(-EPROBE_DEFER);
++	struct reset_controller_dev *r, *rcdev;
++	struct of_phandle_args args;
++	int index = 0;
++	int rstc_id;
++	int ret;
++
++	if (!dev)
++		return ERR_PTR(-EINVAL);
++
++	if (id)
++		index = of_property_match_string(dev->of_node,
++						 "reset-names", id);
++	ret = of_parse_phandle_with_args(dev->of_node, "resets", "#reset-cells",
++					 index, &args);
++	if (ret)
++		return ERR_PTR(ret);
++
++	mutex_lock(&reset_controller_list_mutex);
++	rcdev = NULL;
++	list_for_each_entry(r, &reset_controller_list, list) {
++		if (args.np == r->of_node) {
++			rcdev = r;
++			break;
++		}
++	}
++	of_node_put(args.np);
++
++	if (!rcdev) {
++		mutex_unlock(&reset_controller_list_mutex);
++		return ERR_PTR(-ENODEV);
++	}
++
++	rstc_id = rcdev->of_xlate(rcdev, &args);
++	if (rstc_id < 0) {
++		mutex_unlock(&reset_controller_list_mutex);
++		return ERR_PTR(rstc_id);
++	}
++
++	try_module_get(rcdev->owner);
++	mutex_unlock(&reset_controller_list_mutex);
++
++	rstc = kzalloc(sizeof(*rstc), GFP_KERNEL);
++	if (!rstc) {
++		module_put(rcdev->owner);
++		return ERR_PTR(-ENOMEM);
++	}
++
++	rstc->dev = dev;
++	rstc->rcdev = rcdev;
++	rstc->id = rstc_id;
++
++	return rstc;
++}
++EXPORT_SYMBOL_GPL(reset_control_get);
++
++/**
++ * reset_control_put - free the reset controller
++ * @rstc: reset controller
++ */
++
++void reset_control_put(struct reset_control *rstc)
++{
++	if (IS_ERR(rstc))
++		return;
++
++	module_put(rstc->rcdev->owner);
++	kfree(rstc);
++}
++EXPORT_SYMBOL_GPL(reset_control_put);
++
++static void devm_reset_control_release(struct device *dev, void *res)
++{
++	reset_control_put(*(struct reset_control **)res);
++}
++
++/**
++ * devm_reset_control_get - resource managed reset_control_get()
++ * @dev: device to be reset by the controller
++ * @id: reset line name
++ *
++ * Managed reset_control_get(). For reset controllers returned from this
++ * function, reset_control_put() is called automatically on driver detach.
++ * See reset_control_get() for more information.
++ */
++struct reset_control *devm_reset_control_get(struct device *dev, const char *id)
++{
++	struct reset_control **ptr, *rstc;
++
++	ptr = devres_alloc(devm_reset_control_release, sizeof(*ptr),
++			   GFP_KERNEL);
++	if (!ptr)
++		return ERR_PTR(-ENOMEM);
++
++	rstc = reset_control_get(dev, id);
++	if (!IS_ERR(rstc)) {
++		*ptr = rstc;
++		devres_add(dev, ptr);
++	} else {
++		devres_free(ptr);
++	}
++
++	return rstc;
++}
++EXPORT_SYMBOL_GPL(devm_reset_control_get);
++
++static int devm_reset_control_match(struct device *dev, void *res, void *data)
++{
++	struct reset_control **rstc = res;
++	if (WARN_ON(!rstc || !*rstc))
++		return 0;
++	return *rstc == data;
++}
++
++/**
++ * devm_reset_control_put - resource managed reset_control_put()
++ * @rstc: reset controller to free
++ *
++ * Deallocate a reset control allocated withd devm_reset_control_get().
++ * This function will not need to be called normally, as devres will take
++ * care of freeing the resource.
++ */
++void devm_reset_control_put(struct reset_control *rstc)
++{
++	int ret;
++
++	ret = devres_release(rstc->dev, devm_reset_control_release,
++			     devm_reset_control_match, rstc);
++	if (ret)
++		WARN_ON(ret);
++}
++EXPORT_SYMBOL_GPL(devm_reset_control_put);
++
++/**
++ * device_reset - find reset controller associated with the device
++ *                and perform reset
++ * @dev: device to be reset by the controller
++ *
++ * Convenience wrapper for reset_control_get() and reset_control_reset().
++ * This is useful for the common case of devices with single, dedicated reset
++ * lines.
++ */
++int device_reset(struct device *dev)
++{
++	struct reset_control *rstc;
++	int ret;
++
++	rstc = reset_control_get(dev, NULL);
++	if (IS_ERR(rstc))
++		return PTR_ERR(rstc);
++
++	ret = reset_control_reset(rstc);
++
++	reset_control_put(rstc);
++
++	return ret;
++}
++EXPORT_SYMBOL_GPL(device_reset);
+diff --git a/include/linux/reset-controller.h b/include/linux/reset-controller.h
+new file mode 100644
+index 0000000..2f61311
+--- /dev/null
++++ b/include/linux/reset-controller.h
+@@ -0,0 +1,51 @@
++#ifndef _LINUX_RESET_CONTROLLER_H_
++#define _LINUX_RESET_CONTROLLER_H_
++
++#include <linux/list.h>
++
++struct reset_controller_dev;
++
++/**
++ * struct reset_control_ops
++ *
++ * @reset: for self-deasserting resets, does all necessary
++ *         things to reset the device
++ * @assert: manually assert the reset line, if supported
++ * @deassert: manually deassert the reset line, if supported
++ */
++struct reset_control_ops {
++	int (*reset)(struct reset_controller_dev *rcdev, unsigned long id);
++	int (*assert)(struct reset_controller_dev *rcdev, unsigned long id);
++	int (*deassert)(struct reset_controller_dev *rcdev, unsigned long id);
++};
++
++struct module;
++struct device_node;
++
++/**
++ * struct reset_controller_dev - reset controller entity that might
++ *                               provide multiple reset controls
++ * @ops: a pointer to device specific struct reset_control_ops
++ * @owner: kernel module of the reset controller driver
++ * @list: internal list of reset controller devices
++ * @of_node: corresponding device tree node as phandle target
++ * @of_reset_n_cells: number of cells in reset line specifiers
++ * @of_xlate: translation function to translate from specifier as found in the
++ *            device tree to id as given to the reset control ops
++ * @nr_resets: number of reset controls in this reset controller device
++ */
++struct reset_controller_dev {
++	struct reset_control_ops *ops;
++	struct module *owner;
++	struct list_head list;
++	struct device_node *of_node;
++	int of_reset_n_cells;
++	int (*of_xlate)(struct reset_controller_dev *rcdev,
++			const struct of_phandle_args *reset_spec);
++	unsigned int nr_resets;
++};
++
++int reset_controller_register(struct reset_controller_dev *rcdev);
++void reset_controller_unregister(struct reset_controller_dev *rcdev);
++
++#endif
+diff --git a/include/linux/reset.h b/include/linux/reset.h
+new file mode 100644
+index 0000000..6082247
+--- /dev/null
++++ b/include/linux/reset.h
+@@ -0,0 +1,17 @@
++#ifndef _LINUX_RESET_H_
++#define _LINUX_RESET_H_
++
++struct device;
++struct reset_control;
++
++int reset_control_reset(struct reset_control *rstc);
++int reset_control_assert(struct reset_control *rstc);
++int reset_control_deassert(struct reset_control *rstc);
++
++struct reset_control *reset_control_get(struct device *dev, const char *id);
++void reset_control_put(struct reset_control *rstc);
++struct reset_control *devm_reset_control_get(struct device *dev, const char *id);
++
++int device_reset(struct device *dev);
++
++#endif
+-- 
+1.7.10.4
+