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of: Merge of_device_alloc() and of_device_make_bus_id()

Browse source 
This patch merges the common routines of_device_alloc() and
of_device_make_bus_id() from powerpc and microblaze.

Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
CC: Michal Simek <monstr@monstr.eu>
CC: Grant Likely <grant.likely@secretlab.ca>
CC: Benjamin Herrenschmidt <benh@kernel.crashing.org>
CC: Stephen Rothwell <sfr@canb.auug.org.au>
CC: microblaze-uclinux@itee.uq.edu.au
CC: linuxppc-dev@ozlabs.org
CC: devicetree-discuss@lists.ozlabs.org
This commit is contained in:
Grant Likely 2010-06-08 07:48:14 -06:00
parent 5fd200f3b3
commit 94c0931983
8 changed files with 92 additions and 175 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

15
arch/microblaze/include/asm/of_device.h
View file

@ -10,19 +10,4 @@
#ifndef _ASM_MICROBLAZE_OF_DEVICE_H
#define _ASM_MICROBLAZE_OF_DEVICE_H
#ifdef __KERNEL__
#include <linux/device.h>
#include <linux/of.h>
extern struct of_device *of_device_alloc(struct device_node *np,
const char *bus_id,
struct device *parent);
extern void of_device_make_bus_id(struct of_device *dev);
/* This is just here during the transition */
#include <linux/of_device.h>
#endif /* __KERNEL__ */
#endif /* _ASM_MICROBLAZE_OF_DEVICE_H */

2
arch/microblaze/kernel/Makefile
View file

@ -15,7 +15,7 @@ endif
extra-y := head.o vmlinux.lds
obj-y += dma.o exceptions.o \
hw_exception_handler.o init_task.o intc.o irq.o of_device.o \
hw_exception_handler.o init_task.o intc.o irq.o \
of_platform.o process.o prom.o prom_parse.o ptrace.o \
setup.o signal.o sys_microblaze.o timer.o traps.o reset.o

64
arch/microblaze/kernel/of_device.c
View file

@ -1,64 +0,0 @@
#include <linux/string.h>
#include <linux/kernel.h>
#include <linux/of.h>
#include <linux/init.h>
#include <linux/module.h>
#include <linux/mod_devicetable.h>
#include <linux/slab.h>
#include <linux/of_device.h>
#include <linux/errno.h>
void of_device_make_bus_id(struct of_device *dev)
{
static atomic_t bus_no_reg_magic;
struct device_node *node = dev->dev.of_node;
const u32 *reg;
u64 addr;
int magic;
/*
* For MMIO, get the physical address
*/
reg = of_get_property(node, "reg", NULL);
if (reg) {
addr = of_translate_address(node, reg);
if (addr != OF_BAD_ADDR) {
dev_set_name(&dev->dev, "%llx.%s",
(unsigned long long)addr, node->name);
return;
}
}
/*
* No BusID, use the node name and add a globally incremented
* counter (and pray...)
*/
magic = atomic_add_return(1, &bus_no_reg_magic);
dev_set_name(&dev->dev, "%s.%d", node->name, magic - 1);
}
EXPORT_SYMBOL(of_device_make_bus_id);
struct of_device *of_device_alloc(struct device_node *np,
const char *bus_id,
struct device *parent)
{
struct of_device *dev;
dev = kzalloc(sizeof(*dev), GFP_KERNEL);
if (!dev)
return NULL;
dev->dev.of_node = of_node_get(np);
dev->dev.dma_mask = &dev->archdata.dma_mask;
dev->dev.parent = parent;
dev->dev.release = of_release_dev;
if (bus_id)
dev_set_name(&dev->dev, bus_id);
else
of_device_make_bus_id(dev);
return dev;
}
EXPORT_SYMBOL(of_device_alloc);

10
arch/powerpc/include/asm/of_device.h
View file

@ -1,13 +1,3 @@
#ifndef _ASM_POWERPC_OF_DEVICE_H
#define _ASM_POWERPC_OF_DEVICE_H
#ifdef __KERNEL__
#include <linux/device.h>
#include <linux/of.h>
extern struct of_device *of_device_alloc(struct device_node *np,
const char *bus_id,
struct device *parent);
#endif /* __KERNEL__ */
#endif /* _ASM_POWERPC_OF_DEVICE_H */

2
arch/powerpc/kernel/Makefile
View file

@ -40,7 +40,7 @@ obj-$(CONFIG_PPC_BOOK3E_64) += exceptions-64e.o
obj-$(CONFIG_PPC64) += vdso64/
obj-$(CONFIG_ALTIVEC) += vecemu.o
obj-$(CONFIG_PPC_970_NAP) += idle_power4.o
obj-$(CONFIG_PPC_OF) += of_device.o of_platform.o prom_parse.o
obj-$(CONFIG_PPC_OF) += of_platform.o prom_parse.o
obj-$(CONFIG_PPC_CLOCK) += clock.o
procfs-y := proc_powerpc.o
obj-$(CONFIG_PROC_FS) += $(procfs-y)

84
arch/powerpc/kernel/of_device.c
View file

@ -1,84 +0,0 @@
#include <linux/string.h>
#include <linux/kernel.h>
#include <linux/of.h>
#include <linux/init.h>
#include <linux/module.h>
#include <linux/mod_devicetable.h>
#include <linux/slab.h>
#include <linux/of_device.h>
#include <asm/errno.h>
#include <asm/dcr.h>
static void of_device_make_bus_id(struct of_device *dev)
{
static atomic_t bus_no_reg_magic;
struct device_node *node = dev->dev.of_node;
const u32 *reg;
u64 addr;
int magic;
/*
* If it's a DCR based device, use 'd' for native DCRs
* and 'D' for MMIO DCRs.
*/
#ifdef CONFIG_PPC_DCR
reg = of_get_property(node, "dcr-reg", NULL);
if (reg) {
#ifdef CONFIG_PPC_DCR_NATIVE
dev_set_name(&dev->dev, "d%x.%s", *reg, node->name);
#else /* CONFIG_PPC_DCR_NATIVE */
addr = of_translate_dcr_address(node, *reg, NULL);
if (addr != OF_BAD_ADDR) {
dev_set_name(&dev->dev, "D%llx.%s",
(unsigned long long)addr, node->name);
return;
}
#endif /* !CONFIG_PPC_DCR_NATIVE */
}
#endif /* CONFIG_PPC_DCR */
/*
* For MMIO, get the physical address
*/
reg = of_get_property(node, "reg", NULL);
if (reg) {
addr = of_translate_address(node, reg);
if (addr != OF_BAD_ADDR) {
dev_set_name(&dev->dev, "%llx.%s",
(unsigned long long)addr, node->name);
return;
}
}
/*
* No BusID, use the node name and add a globally incremented
* counter (and pray...)
*/
magic = atomic_add_return(1, &bus_no_reg_magic);
dev_set_name(&dev->dev, "%s.%d", node->name, magic - 1);
}
struct of_device *of_device_alloc(struct device_node *np,
const char *bus_id,
struct device *parent)
{
struct of_device *dev;
dev = kzalloc(sizeof(*dev), GFP_KERNEL);
if (!dev)
return NULL;
dev->dev.of_node = of_node_get(np);
dev->dev.dma_mask = &dev->archdata.dma_mask;
dev->dev.parent = parent;
dev->dev.release = of_release_dev;
if (bus_id)
dev_set_name(&dev->dev, "%s", bus_id);
else
of_device_make_bus_id(dev);
return dev;
}
EXPORT_SYMBOL(of_device_alloc);

87
drivers/of/platform.c
View file

@ -407,6 +407,93 @@ EXPORT_SYMBOL(of_unregister_driver);
* mechanism for creating devices from device tree nodes.
*/
/**
* of_device_make_bus_id - Use the device node data to assign a unique name
* @dev: pointer to device structure that is linked to a device tree node
*
* This routine will first try using either the dcr-reg or the reg property
* value to derive a unique name. As a last resort it will use the node
* name followed by a unique number.
*/
static void of_device_make_bus_id(struct device *dev)
{
static atomic_t bus_no_reg_magic;
struct device_node *node = dev->of_node;
const u32 *reg;
u64 addr;
int magic;
#ifdef CONFIG_PPC_DCR
/*
* If it's a DCR based device, use 'd' for native DCRs
* and 'D' for MMIO DCRs.
*/
reg = of_get_property(node, "dcr-reg", NULL);
if (reg) {
#ifdef CONFIG_PPC_DCR_NATIVE
dev_set_name(dev, "d%x.%s", *reg, node->name);
#else /* CONFIG_PPC_DCR_NATIVE */
u64 addr = of_translate_dcr_address(node, *reg, NULL);
if (addr != OF_BAD_ADDR) {
dev_set_name(dev, "D%llx.%s",
(unsigned long long)addr, node->name);
return;
}
#endif /* !CONFIG_PPC_DCR_NATIVE */
}
#endif /* CONFIG_PPC_DCR */
/*
* For MMIO, get the physical address
*/
reg = of_get_property(node, "reg", NULL);
if (reg) {
addr = of_translate_address(node, reg);
if (addr != OF_BAD_ADDR) {
dev_set_name(dev, "%llx.%s",
(unsigned long long)addr, node->name);
return;
}
}
/*
* No BusID, use the node name and add a globally incremented
* counter (and pray...)
*/
magic = atomic_add_return(1, &bus_no_reg_magic);
dev_set_name(dev, "%s.%d", node->name, magic - 1);
}
/**
* of_device_alloc - Allocate and initialize an of_device
* @np: device node to assign to device
* @bus_id: Name to assign to the device. May be null to use default name.
* @parent: Parent device.
*/
struct of_device *of_device_alloc(struct device_node *np,
const char *bus_id,
struct device *parent)
{
struct of_device *dev;
dev = kzalloc(sizeof(*dev), GFP_KERNEL);
if (!dev)
return NULL;
dev->dev.of_node = of_node_get(np);
dev->dev.dma_mask = &dev->archdata.dma_mask;
dev->dev.parent = parent;
dev->dev.release = of_release_dev;
if (bus_id)
dev_set_name(&dev->dev, "%s", bus_id);
else
of_device_make_bus_id(&dev->dev);
return dev;
}
EXPORT_SYMBOL(of_device_alloc);
/**
* of_platform_device_create - Alloc, initialize and register an of_device
* @np: pointer to node to create device for

3
include/linux/of_platform.h
View file

@ -60,6 +60,9 @@ static inline void of_unregister_platform_driver(struct of_platform_driver *drv)
of_unregister_driver(drv);
}
extern struct of_device *of_device_alloc(struct device_node *np,
const char *bus_id,
struct device *parent);
#include <asm/of_platform.h>
extern struct of_device *of_find_device_by_node(struct device_node *np);