diff options
author | Simon Glass <sjg@chromium.org> | 2015-04-28 20:25:09 -0600 |
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committer | Simon Glass <sjg@chromium.org> | 2015-04-29 21:02:33 -0600 |
commit | 11f4dc1583c387fbb46d473c942c4bcfe5af303e (patch) | |
tree | 109694befb15f2f476a8ce7f861680f06590ed3b /drivers/cpu/cpu-uclass.c | |
parent | 33eac2dc25eb8b38d2991c61036d20f707fdd54f (diff) |
dm: Implement a CPU uclass
It is useful to be able to keep track of the available CPUs in a multi-CPU
system. This uclass is mostly intended for use with SMP systems.
The uclass provides methods for getting basic information about each CPU.
Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
Diffstat (limited to 'drivers/cpu/cpu-uclass.c')
-rw-r--r-- | drivers/cpu/cpu-uclass.c | 61 |
1 files changed, 61 insertions, 0 deletions
diff --git a/drivers/cpu/cpu-uclass.c b/drivers/cpu/cpu-uclass.c new file mode 100644 index 00000000000..ab18ee2ea93 --- /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, +}; |