On Friday, March 13, 2015 04:24:11 PM Arnd Bergmann wrote:
> On Friday 13 March 2015 15:10:38 Grant Likely wrote:
> > On Thu, Mar 12, 2015 at 1:41 AM, Rafael J. Wysocki <rjw@xxxxxxxxxxxxx> wrote:
> > > On Monday, January 26, 2015 03:17:40 PM Heikki Krogerus wrote:
> > > That doesn't seem to go in the right direction to be honest.
> > >
> > > Actually, having introduced struct fwnode_handle, we should perhaps try to
> > > replace both of_node and acpi_node with a single struct fwnode_handle pointer
> > > and then add a new fwnode_type for the "pdata" stuff.
> >
> > I agree on this, but it will be a lot of work to convert...
> >
> > > If you don't want to deal with of_node, which I can understand easily, it
> > > may be worth trying with acpi_node alone at this point and once you have
> > > the fwnode_handle pointer, you might use it for both ACPI and "pdata"?
> > >
> > > Grant, Arnd, I wonder what you think?
> >
> > That makes sense, and we can populate the fwnode_handle even when
> > using DT. That will allow a transition period to move everyone over to
> > the fwnode_handle.
>
> Agreed on both as well.
OK
So below is what it takes to use struct fwnode_handle to represent ACPI
companions.
Rafael
---
From: Rafael J. Wysocki <rafael.j.wysocki@xxxxxxxxx>
Subject: driver core / ACPI: Represent ACPI companions using fwnode_handle
Now that we have struct fwnode_handle, we can use that to point to
ACPI companions from struct device objects instead of pointing to
struct acpi_device directly.
There are two benefits from that. First, the somewhat ugly and
hackish struct acpi_dev_node can be dropped and, second, the same
struct fwnode_handle pointer can be used in the future to point
to other (non-ACPI) firmware device node types.
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@xxxxxxxxx>
---
drivers/acpi/acpi_platform.c | 2 +-
drivers/acpi/dock.c | 2 +-
drivers/base/platform.c | 2 +-
drivers/i2c/i2c-core.c | 4 ++--
include/acpi/acpi_bus.h | 3 ++-
include/linux/acpi.h | 7 ++++---
include/linux/device.h | 13 +++----------
include/linux/fwnode.h | 25 +++++++++++++++++++++++++
include/linux/i2c.h | 4 ++--
include/linux/platform_device.h | 2 +-
include/linux/property.h | 11 +----------
11 files changed, 43 insertions(+), 32 deletions(-)
Index: linux-pm/include/linux/device.h
===================================================================
--- linux-pm.orig/include/linux/device.h
+++ linux-pm/include/linux/device.h
@@ -38,6 +38,7 @@ struct class;
struct subsys_private;
struct bus_type;
struct device_node;
+struct fwnode_handle;
struct iommu_ops;
struct iommu_group;
@@ -650,14 +651,6 @@ struct device_dma_parameters {
unsigned long segment_boundary_mask;
};
-struct acpi_device;
-
-struct acpi_dev_node {
-#ifdef CONFIG_ACPI
- struct acpi_device *companion;
-#endif
-};
-
/**
* struct device - The basic device structure
* @parent: The device's "parent" device, the device to which it is attached.
@@ -703,7 +696,7 @@ struct acpi_dev_node {
* @cma_area: Contiguous memory area for dma allocations
* @archdata: For arch-specific additions.
* @of_node: Associated device tree node.
- * @acpi_node: Associated ACPI device node.
+ * @fwnode: Associated device node supplied by platform firmware.
* @devt: For creating the sysfs "dev".
* @id: device instance
* @devres_lock: Spinlock to protect the resource of the device.
@@ -779,7 +772,7 @@ struct device {
struct dev_archdata archdata;
struct device_node *of_node; /* associated device tree node */
- struct acpi_dev_node acpi_node; /* associated ACPI device node */
+ struct fwnode_handle *fwnode; /* firmware device node */
dev_t devt; /* dev_t, creates the sysfs "dev" */
u32 id; /* device instance */
Index: linux-pm/include/linux/fwnode.h
===================================================================
--- /dev/null
+++ linux-pm/include/linux/fwnode.h
@@ -0,0 +1,25 @@
+/*
+ * fwnode.h - Firmware device node object handle type definition.
+ *
+ * Copyright (C) 2015, Intel Corporation
+ * Author: Rafael J. Wysocki <rafael.j.wysocki@xxxxxxxxx>
+ *
+ * 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.
+ */
+
+#ifndef _LINUX_FWNODE_H_
+#define _LINUX_FWNODE_H_
+
+enum fwnode_type {
+ FWNODE_INVALID = 0,
+ FWNODE_OF,
+ FWNODE_ACPI,
+};
+
+struct fwnode_handle {
+ enum fwnode_type type;
+};
+
+#endif
Index: linux-pm/include/linux/property.h
===================================================================
--- linux-pm.orig/include/linux/property.h
+++ linux-pm/include/linux/property.h
@@ -13,6 +13,7 @@
#ifndef _LINUX_PROPERTY_H_
#define _LINUX_PROPERTY_H_
+#include <linux/fwnode.h>
#include <linux/types.h>
struct device;
@@ -40,16 +41,6 @@ int device_property_read_string_array(st
int device_property_read_string(struct device *dev, const char *propname,
const char **val);
-enum fwnode_type {
- FWNODE_INVALID = 0,
- FWNODE_OF,
- FWNODE_ACPI,
-};
-
-struct fwnode_handle {
- enum fwnode_type type;
-};
-
bool fwnode_property_present(struct fwnode_handle *fwnode, const char *propname);
int fwnode_property_read_u8_array(struct fwnode_handle *fwnode,
const char *propname, u8 *val,
Index: linux-pm/include/acpi/acpi_bus.h
===================================================================
--- linux-pm.orig/include/acpi/acpi_bus.h
+++ linux-pm/include/acpi/acpi_bus.h
@@ -386,7 +386,8 @@ static inline bool is_acpi_node(struct f
static inline struct acpi_device *acpi_node(struct fwnode_handle *fwnode)
{
- return fwnode ? container_of(fwnode, struct acpi_device, fwnode) : NULL;
+ return is_acpi_node(fwnode) ?
+ container_of(fwnode, struct acpi_device, fwnode) : NULL;
}
static inline struct fwnode_handle *acpi_fwnode_handle(struct acpi_device *adev)
Index: linux-pm/include/linux/acpi.h
===================================================================
--- linux-pm.orig/include/linux/acpi.h
+++ linux-pm/include/linux/acpi.h
@@ -29,7 +29,7 @@
#include <linux/ioport.h> /* for struct resource */
#include <linux/resource_ext.h>
#include <linux/device.h>
-#include <linux/property.h>
+#include <linux/fwnode.h>
#ifndef _LINUX
#define _LINUX
@@ -53,8 +53,9 @@ static inline acpi_handle acpi_device_ha
return adev ? adev->handle : NULL;
}
-#define ACPI_COMPANION(dev) ((dev)->acpi_node.companion)
-#define ACPI_COMPANION_SET(dev, adev) ACPI_COMPANION(dev) = (adev)
+#define ACPI_COMPANION(dev) acpi_node((dev)->fwnode)
+#define ACPI_COMPANION_SET(dev, adev) (dev)->fwnode = (adev) ? \
+ acpi_fwnode_handle(adev) : NULL
#define ACPI_HANDLE(dev) acpi_device_handle(ACPI_COMPANION(dev))
static inline void acpi_preset_companion(struct device *dev,
Index: linux-pm/include/linux/platform_device.h
===================================================================
--- linux-pm.orig/include/linux/platform_device.h
+++ linux-pm/include/linux/platform_device.h
@@ -59,7 +59,7 @@ extern int platform_add_devices(struct p
struct platform_device_info {
struct device *parent;
- struct acpi_dev_node acpi_node;
+ struct fwnode_handle *fwnode;
const char *name;
int id;
Index: linux-pm/drivers/acpi/dock.c
===================================================================
--- linux-pm.orig/drivers/acpi/dock.c
+++ linux-pm/drivers/acpi/dock.c
@@ -615,7 +615,7 @@ void acpi_dock_add(struct acpi_device *a
memset(&pdevinfo, 0, sizeof(pdevinfo));
pdevinfo.name = "dock";
pdevinfo.id = dock_station_count;
- pdevinfo.acpi_node.companion = adev;
+ pdevinfo.fwnode = acpi_fwnode_handle(adev);
pdevinfo.data = &ds;
pdevinfo.size_data = sizeof(ds);
dd = platform_device_register_full(&pdevinfo);
Index: linux-pm/drivers/acpi/acpi_platform.c
===================================================================
--- linux-pm.orig/drivers/acpi/acpi_platform.c
+++ linux-pm/drivers/acpi/acpi_platform.c
@@ -102,7 +102,7 @@ struct platform_device *acpi_create_plat
pdevinfo.id = -1;
pdevinfo.res = resources;
pdevinfo.num_res = count;
- pdevinfo.acpi_node.companion = adev;
+ pdevinfo.fwnode = acpi_fwnode_handle(adev);
pdevinfo.dma_mask = DMA_BIT_MASK(32);
pdev = platform_device_register_full(&pdevinfo);
if (IS_ERR(pdev))
Index: linux-pm/drivers/base/platform.c
===================================================================
--- linux-pm.orig/drivers/base/platform.c
+++ linux-pm/drivers/base/platform.c
@@ -454,7 +454,7 @@ struct platform_device *platform_device_
goto err_alloc;
pdev->dev.parent = pdevinfo->parent;
- ACPI_COMPANION_SET(&pdev->dev, pdevinfo->acpi_node.companion);
+ pdev->dev.fwnode = pdevinfo->fwnode;
if (pdevinfo->dma_mask) {
/*
Index: linux-pm/drivers/i2c/i2c-core.c
===================================================================
--- linux-pm.orig/drivers/i2c/i2c-core.c
+++ linux-pm/drivers/i2c/i2c-core.c
@@ -133,7 +133,7 @@ static acpi_status acpi_i2c_add_device(a
return AE_OK;
memset(&info, 0, sizeof(info));
- info.acpi_node.companion = adev;
+ info.fwnode = acpi_fwnode_handle(adev);
info.irq = -1;
INIT_LIST_HEAD(&resource_list);
@@ -974,7 +974,7 @@ i2c_new_device(struct i2c_adapter *adap,
client->dev.bus = &i2c_bus_type;
client->dev.type = &i2c_client_type;
client->dev.of_node = info->of_node;
- ACPI_COMPANION_SET(&client->dev, info->acpi_node.companion);
+ client->dev.fwnode = info->fwnode;
i2c_dev_set_name(adap, client);
status = device_register(&client->dev);
Index: linux-pm/include/linux/i2c.h
===================================================================
--- linux-pm.orig/include/linux/i2c.h
+++ linux-pm/include/linux/i2c.h
@@ -278,7 +278,7 @@ static inline int i2c_slave_event(struct
* @platform_data: stored in i2c_client.dev.platform_data
* @archdata: copied into i2c_client.dev.archdata
* @of_node: pointer to OpenFirmware device node
- * @acpi_node: ACPI device node
+ * @fwnode: device node supplied by the platform firmware
* @irq: stored in i2c_client.irq
*
* I2C doesn't actually support hardware probing, although controllers and
@@ -299,7 +299,7 @@ struct i2c_board_info {
void *platform_data;
struct dev_archdata *archdata;
struct device_node *of_node;
- struct acpi_dev_node acpi_node;
+ struct fwnode_handle *fwnode;
int irq;
};
--
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