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authorJoachim Fenkes <fenkes@de.ibm.com>2007-09-26 19:44:12 +1000
committerPaul Mackerras <paulus@samba.org>2007-10-17 22:30:07 +1000
commitfec738dd48bd33743c12cebe1bf954e487756231 (patch)
treead0423ca2db3cd22d161c117096337d9c3e2ccf4 /arch/powerpc
parentebb3e820b83e426ee331bae6d8fb0e54f472a25d (diff)
[POWERPC] Move of_device allocation into of_device.[ch]
Extract generic of_device allocation code from of_platform_device_create() and move it into of_device.[ch], called of_device_alloc(). Also, there's now of_device_free() which puts the device node. This way, bus drivers that build on of_platform (like ibmebus will) can build upon this code instead of reinventing the wheel. Signed-off-by: Joachim Fenkes <fenkes@de.ibm.com> Acked-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Paul Mackerras <paulus@samba.org>
Diffstat (limited to 'arch/powerpc')
-rw-r--r--arch/powerpc/kernel/of_device.c80
-rw-r--r--arch/powerpc/kernel/of_platform.c70
2 files changed, 82 insertions, 68 deletions
diff --git a/arch/powerpc/kernel/of_device.c b/arch/powerpc/kernel/of_device.c
index 8f3db32fac8..3388ad61999 100644
--- a/arch/powerpc/kernel/of_device.c
+++ b/arch/powerpc/kernel/of_device.c
@@ -7,8 +7,88 @@
#include <linux/slab.h>
#include <asm/errno.h>
+#include <asm/dcr.h>
#include <asm/of_device.h>
+static void of_device_make_bus_id(struct of_device *dev)
+{
+ static atomic_t bus_no_reg_magic;
+ struct device_node *node = dev->node;
+ char *name = dev->dev.bus_id;
+ 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
+ snprintf(name, BUS_ID_SIZE, "d%x.%s",
+ *reg, node->name);
+#else /* CONFIG_PPC_DCR_NATIVE */
+ addr = of_translate_dcr_address(node, *reg, NULL);
+ if (addr != OF_BAD_ADDR) {
+ snprintf(name, BUS_ID_SIZE,
+ "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) {
+ snprintf(name, BUS_ID_SIZE,
+ "%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);
+ snprintf(name, BUS_ID_SIZE, "%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->node = of_node_get(np);
+ dev->dev.dma_mask = &dev->dma_mask;
+ dev->dev.parent = parent;
+ dev->dev.release = of_release_dev;
+ dev->dev.archdata.of_node = np;
+ dev->dev.archdata.numa_node = of_node_to_nid(np);
+
+ if (bus_id)
+ strlcpy(dev->dev.bus_id, bus_id, BUS_ID_SIZE);
+ else
+ of_device_make_bus_id(dev);
+
+ return dev;
+}
+EXPORT_SYMBOL(of_device_alloc);
+
ssize_t of_device_get_modalias(struct of_device *ofdev,
char *str, ssize_t len)
{
diff --git a/arch/powerpc/kernel/of_platform.c b/arch/powerpc/kernel/of_platform.c
index eca8ccc3fa1..aeaa20268ce 100644
--- a/arch/powerpc/kernel/of_platform.c
+++ b/arch/powerpc/kernel/of_platform.c
@@ -23,7 +23,6 @@
#include <linux/of_platform.h>
#include <asm/errno.h>
-#include <asm/dcr.h>
#include <asm/topology.h>
#include <asm/pci-bridge.h>
#include <asm/ppc-pci.h>
@@ -53,8 +52,6 @@ static struct of_device_id of_default_bus_ids[] = {
{},
};
-static atomic_t bus_no_reg_magic;
-
struct bus_type of_platform_bus_type = {
.uevent = of_device_uevent,
};
@@ -87,89 +84,26 @@ void of_unregister_platform_driver(struct of_platform_driver *drv)
}
EXPORT_SYMBOL(of_unregister_platform_driver);
-static void of_platform_make_bus_id(struct of_device *dev)
-{
- struct device_node *node = dev->node;
- char *name = dev->dev.bus_id;
- 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
- snprintf(name, BUS_ID_SIZE, "d%x.%s",
- *reg, node->name);
-#else /* CONFIG_PPC_DCR_NATIVE */
- addr = of_translate_dcr_address(node, *reg, NULL);
- if (addr != OF_BAD_ADDR) {
- snprintf(name, BUS_ID_SIZE,
- "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) {
- snprintf(name, BUS_ID_SIZE,
- "%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);
- snprintf(name, BUS_ID_SIZE, "%s.%d", node->name, magic - 1);
-}
-
struct of_device* of_platform_device_create(struct device_node *np,
const char *bus_id,
struct device *parent)
{
struct of_device *dev;
- dev = kzalloc(sizeof(*dev), GFP_KERNEL);
+ dev = of_device_alloc(np, bus_id, parent);
if (!dev)
return NULL;
- dev->node = of_node_get(np);
dev->dma_mask = 0xffffffffUL;
- dev->dev.dma_mask = &dev->dma_mask;
- dev->dev.parent = parent;
dev->dev.bus = &of_platform_bus_type;
- dev->dev.release = of_release_dev;
- dev->dev.archdata.of_node = np;
- dev->dev.archdata.numa_node = of_node_to_nid(np);
/* We do not fill the DMA ops for platform devices by default.
* This is currently the responsibility of the platform code
* to do such, possibly using a device notifier
*/
- if (bus_id)
- strlcpy(dev->dev.bus_id, bus_id, BUS_ID_SIZE);
- else
- of_platform_make_bus_id(dev);
-
if (of_device_register(dev) != 0) {
- kfree(dev);
+ of_device_free(dev);
return NULL;
}