dm: Implement a CPU uclass

[karo-tx-uboot.git] / drivers / cpu / cpu-uclass.c

diff --git a/drivers/cpu/cpu-uclass.c b/drivers/cpu/cpu-uclass.c
new file mode 100644 (file)
index 0000000..ab18ee2
--- /dev/null
+++ b/drivers/cpu/cpu-uclass.c
@@ -0,0 +1,61 @@
+/*
+ * Copyright (C) 2015 Google, Inc
+ * Written by Simon Glass <sjg@chromium.org>
+ *
+ * SPDX-License-Identifier:    GPL-2.0+
+ */
+
+#include <common.h>
+#include <cpu.h>
+#include <dm.h>
+#include <dm/lists.h>
+#include <dm/root.h>
+
+int cpu_get_desc(struct udevice *dev, char *buf, int size)
+{
+       struct cpu_ops *ops = cpu_get_ops(dev);
+
+       if (!ops->get_desc)
+               return -ENOSYS;
+
+       return ops->get_desc(dev, buf, size);
+}
+
+int cpu_get_info(struct udevice *dev, struct cpu_info *info)
+{
+       struct cpu_ops *ops = cpu_get_ops(dev);
+
+       if (!ops->get_desc)
+               return -ENOSYS;
+
+       return ops->get_info(dev, info);
+}
+
+U_BOOT_DRIVER(cpu_bus) = {
+       .name   = "cpu_bus",
+       .id     = UCLASS_SIMPLE_BUS,
+       .per_child_platdata_auto_alloc_size = sizeof(struct cpu_platdata),
+};
+
+static int uclass_cpu_init(struct uclass *uc)
+{
+       struct udevice *dev;
+       int node;
+       int ret;
+
+       node = fdt_path_offset(gd->fdt_blob, "/cpus");
+       if (node < 0)
+               return 0;
+
+       ret = device_bind_driver_to_node(dm_root(), "cpu_bus", "cpus", node,
+                                        &dev);
+
+       return ret;
+}
+
+UCLASS_DRIVER(cpu) = {
+       .id             = UCLASS_CPU,
+       .name           = "cpu",
+       .flags          = DM_UC_FLAG_SEQ_ALIAS,
+       .init           = uclass_cpu_init,
+};