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2017-11-02License cleanup: add SPDX GPL-2.0 license identifier to files with no licenseGreg Kroah-Hartman
2017-09-08Merge tag 'pci-v4.14-changes' of git://git.kernel.org/pub/scm/linux/kernel/gi...Linus Torvalds
2017-08-29microblaze: Convert to using %pOF instead of full_nameRob Herring
2017-08-10microblaze/PCI: Remove pcibios_setup_bus_{self/devices} dead codeLorenzo Pieralisi
2017-08-02PCI: Add a generic weak pcibios_align_resource()Palmer Dabbelt
2017-08-02PCI: Add a generic weak pcibios_fixup_bus()Palmer Dabbelt
2017-04-20PCI: Add BAR index argument to pci_mmap_page_range()David Woodhouse
2017-02-24mm: remove shmem_mapping() shmem_zero_setup() duplicatesHugh Dickins
2016-09-13microblaze/PCI: Add multidomain support for procfsBharat Kumar Gogada
2016-06-17microblaze/PCI: Implement pci_resource_to_user() with pcibios_resource_to_bus()Bjorn Helgaas
2016-06-17microblaze/PCI: Remove useless __pci_mmap_set_pgprot()Bjorn Helgaas
2016-05-16microblaze: pci: export isa_io_base to fix link errorsFengguang Wu
2016-03-08microblaze/PCI: Support generic Xilinx AXI PCIe Host Bridge IP driverBharat Kumar Gogada
2015-09-15PCI: Revert "PCI: Call pci_read_bridge_bases() from core instead of arch code"Bjorn Helgaas
2015-07-23PCI: Call pci_read_bridge_bases() from core instead of arch codeLorenzo Pieralisi
2015-03-19PCI: Assign resources before drivers claim devices (pci_scan_root_bus())Yijing Wang
2015-01-16microblaze/PCI: Clip bridge windows to fit in upstream windowsYinghai Lu
2014-10-27microblaze: Fix IO space breakage after of_pci_range_to_resource() changeMichal Simek
2014-06-05Merge tag 'microblaze-3.16-rc1' of git://git.monstr.eu/linux-2.6-microblaze i...Linus Torvalds
2014-06-04microblaze: Cleanup PCI_DRAM_OFFSET handlingMichal Simek
2014-06-04microblaze: Do not setup pci_dma_opsMichal Simek
2014-04-30PCI: Move Open Firmware devspec attribute to PCI common codeSebastian Ott
2014-03-19microblaze/PCI: Use default pcibios_enable_device()Bjorn Helgaas
2013-11-07Merge remote-tracking branch 'grant/devicetree/next' into for-nextRob Herring
2013-10-24microblaze/pci: Drop PowerPC-ism from irq parsingGrant Likely
2013-10-24of/irq: simplify args to irq_create_of_mappingGrant Likely
2013-10-24of/irq: Replace of_irq with of_phandle_argsGrant Likely
2013-10-24of/irq: Rename of_irq_map_* functions to of_irq_parse_*Grant Likely
2013-10-09microblaze: clean-up prom.h implicit includesRob Herring
2013-09-03of/pci: Use of_pci_range_parserAndrew Murray
2013-05-09microblaze: pci: Remove duplicated include from pci-common.cWei Yongjun
2013-02-12microblaze: Do not use module.h in files which are not modulesMichal Simek
2013-02-12microblaze: Fix coding style issuesMichal Simek
2013-01-07Merge branch 'next' of git://git.monstr.eu/linux-2.6-microblazeLinus Torvalds
2013-01-04microblaze: Fix pci compilation and sparse warningsMichal Simek
2013-01-03ARCH: drivers remove __dev* attributes.Greg Kroah-Hartman
2012-11-28microblaze/PCI: Remove CONFIG_HOTPLUG ifdefsBill Pemberton
2012-07-24Merge tag 'for-3.6' of git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pciLinus Torvalds
2012-07-06devicetree: add helper inline for retrieving a node's full nameGrant Likely
2012-07-05Merge branch 'pci/myron-pcibios_setup' into nextBjorn Helgaas
2012-07-05microblaze/PCI: factor out pcibios_setup()Myron Stowe
2012-06-13PCI: replace struct pci_bus secondary/subordinate with busn_resYinghai Lu
2012-05-15microblaze/PCI: fix "io_offset undeclared" errorBjorn Helgaas
2012-02-23microblaze/PCI: get rid of device resource fixupsBjorn Helgaas
2012-02-23microblaze/PCI: remove unused pci_flagsBjorn Helgaas
2012-01-11Merge branch 'linux-next' of git://git.kernel.org/pub/scm/linux/kernel/git/jb...Linus Torvalds
2012-01-10Merge tag 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhostLinus Torvalds
2012-01-06microblaze/PCI: use pci_scan_root_bus()Bjorn Helgaas
2012-01-06microblaze/PCI: convert to pci_create_root_bus() for correct root bus resourcesBjorn Helgaas
2012-01-06microblaze/PCI: make pcibios_setup_phb_resources() staticBjorn Helgaas
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/*
 * drivers/acpi/device_sysfs.c - ACPI device sysfs attributes and modalias.
 *
 * Copyright (C) 2015, Intel Corp.
 * Author: Mika Westerberg <mika.westerberg@linux.intel.com>
 * Author: Rafael J. Wysocki <rafael.j.wysocki@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.
 *
 *  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.
 *
 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 */

#include <linux/acpi.h>
#include <linux/device.h>
#include <linux/export.h>
#include <linux/nls.h>

#include "internal.h"

static ssize_t acpi_object_path(acpi_handle handle, char *buf)
{
	struct acpi_buffer path = {ACPI_ALLOCATE_BUFFER, NULL};
	int result;

	result = acpi_get_name(handle, ACPI_FULL_PATHNAME, &path);
	if (result)
		return result;

	result = sprintf(buf, "%s\n", (char *)path.pointer);
	kfree(path.pointer);
	return result;
}

struct acpi_data_node_attr {
	struct attribute attr;
	ssize_t (*show)(struct acpi_data_node *, char *);
	ssize_t (*store)(struct acpi_data_node *, const char *, size_t count);
};

#define DATA_NODE_ATTR(_name)			\
	static struct acpi_data_node_attr data_node_##_name =	\
		__ATTR(_name, 0444, data_node_show_##_name, NULL)

static ssize_t data_node_show_path(struct acpi_data_node *dn, char *buf)
{
	return acpi_object_path(dn->handle, buf);
}

DATA_NODE_ATTR(path);

static struct attribute *acpi_data_node_default_attrs[] = {
	&data_node_path.attr,
	NULL
};

#define to_data_node(k) container_of(k, struct acpi_data_node, kobj)
#define to_attr(a) container_of(a, struct acpi_data_node_attr, attr)

static ssize_t acpi_data_node_attr_show(struct kobject *kobj,
					struct attribute *attr, char *buf)
{
	struct acpi_data_node *dn = to_data_node(kobj);
	struct acpi_data_node_attr *dn_attr = to_attr(attr);

	return dn_attr->show ? dn_attr->show(dn, buf) : -ENXIO;
}

static const struct sysfs_ops acpi_data_node_sysfs_ops = {
	.show	= acpi_data_node_attr_show,
};

static void acpi_data_node_release(struct kobject *kobj)
{
	struct acpi_data_node *dn = to_data_node(kobj);
	complete(&dn->kobj_done);
}

static struct kobj_type acpi_data_node_ktype = {
	.sysfs_ops = &acpi_data_node_sysfs_ops,
	.default_attrs = acpi_data_node_default_attrs,
	.release = acpi_data_node_release,
};

static void acpi_expose_nondev_subnodes(struct kobject *kobj,
					struct acpi_device_data *data)
{
	struct list_head *list = &data->subnodes;
	struct acpi_data_node *dn;

	if (list_empty(list))
		return;

	list_for_each_entry(dn, list, sibling) {
		int ret;

		init_completion(&dn->kobj_done);
		ret = kobject_init_and_add(&dn->kobj, &acpi_data_node_ktype,
					   kobj, "%s", dn->name);
		if (ret)
			acpi_handle_err(dn->handle, "Failed to expose (%d)\n", ret);
		else
			acpi_expose_nondev_subnodes(&dn->kobj, &dn->data);
	}
}

static void acpi_hide_nondev_subnodes(struct acpi_device_data *data)
{
	struct list_head *list = &data->subnodes;
	struct acpi_data_node *dn;

	if (list_empty(list))
		return;

	list_for_each_entry_reverse(dn, list, sibling) {
		acpi_hide_nondev_subnodes(&dn->data);
		kobject_put(&dn->kobj);
	}
}

/**
 * create_pnp_modalias - Create hid/cid(s) string for modalias and uevent
 * @acpi_dev: ACPI device object.
 * @modalias: Buffer to print into.
 * @size: Size of the buffer.
 *
 * Creates hid/cid(s) string needed for modalias and uevent
 * e.g. on a device with hid:IBM0001 and cid:ACPI0001 you get:
 * char *modalias: "acpi:IBM0001:ACPI0001"
 * Return: 0: no _HID and no _CID
 *         -EINVAL: output error
 *         -ENOMEM: output is truncated
*/
static int create_pnp_modalias(struct acpi_device *acpi_dev, char *modalias,
			       int size)
{
	int len;
	int count;
	struct acpi_hardware_id *id;

	/*
	 * Since we skip ACPI_DT_NAMESPACE_HID from the modalias below, 0 should
	 * be returned if ACPI_DT_NAMESPACE_HID is the only ACPI/PNP ID in the
	 * device's list.
	 */
	count = 0;
	list_for_each_entry(id, &acpi_dev->pnp.ids, list)
		if (strcmp(id->id, ACPI_DT_NAMESPACE_HID))
			count++;

	if (!count)
		return 0;

	len = snprintf(modalias, size, "acpi:");
	if (len <= 0)
		return len;

	size -= len;

	list_for_each_entry(id, &acpi_dev->pnp.ids, list) {
		if (!strcmp(id->id, ACPI_DT_NAMESPACE_HID))
			continue;

		count = snprintf(&modalias[len], size, "%s:", id->id);
		if (count < 0)
			return -EINVAL;

		if (count >= size)
			return -ENOMEM;

		len += count;
		size -= count;
	}
	modalias[len] = '\0';
	return len;
}

/**
 * create_of_modalias - Creates DT compatible string for modalias and uevent
 * @acpi_dev: ACPI device object.
 * @modalias: Buffer to print into.
 * @size: Size of the buffer.
 *
 * Expose DT compatible modalias as of:NnameTCcompatible.  This function should
 * only be called for devices having ACPI_DT_NAMESPACE_HID in their list of
 * ACPI/PNP IDs.
 */
static int create_of_modalias(struct acpi_device *acpi_dev, char *modalias,
			      int size)
{
	struct acpi_buffer buf = { ACPI_ALLOCATE_BUFFER };
	const union acpi_object *of_compatible, *obj;
	int len, count;
	int i, nval;
	char *c;

	acpi_get_name(acpi_dev->handle, ACPI_SINGLE_NAME, &buf);
	/* DT strings are all in lower case */
	for (c = buf.pointer; *c != '\0'; c++)
		*c = tolower(*c);

	len = snprintf(modalias, size, "of:N%sT", (char *)buf.pointer);
	ACPI_FREE(buf.pointer);

	if (len <= 0)
		return len;

	of_compatible = acpi_dev->data.of_compatible;
	if (of_compatible->type == ACPI_TYPE_PACKAGE) {
		nval = of_compatible->package.count;
		obj = of_compatible->package.elements;
	} else { /* Must be ACPI_TYPE_STRING. */
		nval = 1;
		obj = of_compatible;
	}
	for (i = 0; i < nval; i++, obj++) {
		count = snprintf(&modalias[len], size, "C%s",
				 obj->string.pointer);
		if