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Diffstat (limited to 'arch/microblaze/kernel/of_device.c')
-rw-r--r--arch/microblaze/kernel/of_device.c115
1 files changed, 115 insertions, 0 deletions
diff --git a/arch/microblaze/kernel/of_device.c b/arch/microblaze/kernel/of_device.c
new file mode 100644
index 000000000000..717edf4ad0b4
--- /dev/null
+++ b/arch/microblaze/kernel/of_device.c
@@ -0,0 +1,115 @@
+#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->node;
+ char *name = dev->dev.bus_id;
+ 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) {
+ 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);
+}
+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->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;
+
+ 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);
+
+int of_device_uevent(struct device *dev, struct kobj_uevent_env *env)
+{
+ struct of_device *ofdev;
+ const char *compat;
+ int seen = 0, cplen, sl;
+
+ if (!dev)
+ return -ENODEV;
+
+ ofdev = to_of_device(dev);
+
+ if (add_uevent_var(env, "OF_NAME=%s", ofdev->node->name))
+ return -ENOMEM;
+
+ if (add_uevent_var(env, "OF_TYPE=%s", ofdev->node->type))
+ return -ENOMEM;
+
+ /* Since the compatible field can contain pretty much anything
+ * it's not really legal to split it out with commas. We split it
+ * up using a number of environment variables instead. */
+
+ compat = of_get_property(ofdev->node, "compatible", &cplen);
+ while (compat && *compat && cplen > 0) {
+ if (add_uevent_var(env, "OF_COMPATIBLE_%d=%s", seen, compat))
+ return -ENOMEM;
+
+ sl = strlen(compat) + 1;
+ compat += sl;
+ cplen -= sl;
+ seen++;
+ }
+
+ if (add_uevent_var(env, "OF_COMPATIBLE_N=%d", seen))
+ return -ENOMEM;
+
+ /* modalias is trickier, we add it in 2 steps */
+ if (add_uevent_var(env, "MODALIAS="))
+ return -ENOMEM;
+ sl = of_device_get_modalias(ofdev, &env->buf[env->buflen-1],
+ sizeof(env->buf) - env->buflen);
+ if (sl >= (sizeof(env->buf) - env->buflen))
+ return -ENOMEM;
+ env->buflen += sl;
+
+ return 0;
+}
+EXPORT_SYMBOL(of_device_uevent);