diff options
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/Kconfig | 2 | ||||
| -rw-r--r-- | drivers/Makefile | 1 | ||||
| -rw-r--r-- | drivers/cpu/Kconfig | 8 | ||||
| -rw-r--r-- | drivers/cpu/Makefile | 7 | ||||
| -rw-r--r-- | drivers/cpu/cpu-uclass.c | 61 |
5 files changed, 79 insertions, 0 deletions
diff --git a/drivers/Kconfig b/drivers/Kconfig index 941aa0c..1f40887 100644 --- a/drivers/Kconfig +++ b/drivers/Kconfig @@ -2,6 +2,8 @@ menu "Device Drivers" source "drivers/core/Kconfig" +source "drivers/cpu/Kconfig" + source "drivers/demo/Kconfig" source "drivers/pci/Kconfig" diff --git a/drivers/Makefile b/drivers/Makefile index 5ef58c0..405b64b 100644 --- a/drivers/Makefile +++ b/drivers/Makefile @@ -3,6 +3,7 @@ obj-$(CONFIG_DM_DEMO) += demo/ obj-$(CONFIG_BIOSEMU) += bios_emulator/ obj-y += block/ obj-$(CONFIG_BOOTCOUNT_LIMIT) += bootcount/ +obj-$(CONFIG_CPU) += cpu/ obj-y += crypto/ obj-$(CONFIG_FPGA) += fpga/ obj-y += hwmon/ diff --git a/drivers/cpu/Kconfig b/drivers/cpu/Kconfig new file mode 100644 index 0000000..0d1424d --- /dev/null +++ b/drivers/cpu/Kconfig @@ -0,0 +1,8 @@ +config CPU + bool "Enable CPU drivers using Driver Model" + help + This allows drivers to be provided for CPUs and their type to be + specified in the board's device tree. For boards which support + multiple CPUs, then normally have to be set up in U-Boot so that + they can work correctly in the OS. This provides a framework for + finding out information about available CPUs and making changes. diff --git a/drivers/cpu/Makefile b/drivers/cpu/Makefile new file mode 100644 index 0000000..8710160 --- /dev/null +++ b/drivers/cpu/Makefile @@ -0,0 +1,7 @@ +# +# Copyright (c) 2015 Google, Inc +# Wolfgang Denk, DENX Software Engineering, wd@denx.de. +# +# SPDX-License-Identifier: GPL-2.0+ +# +obj-$(CONFIG_CPU) += cpu-uclass.o diff --git a/drivers/cpu/cpu-uclass.c b/drivers/cpu/cpu-uclass.c new file mode 100644 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, +}; |