[u-boot.git] / drivers / cpu / cpu-uclass.c

// SPDX-License-Identifier: GPL-2.0+
/*
 * Copyright (C) 2015 Google, Inc
 * Written by Simon Glass <[email protected]>
 */

#include <common.h>
#include <cpu.h>
#include <dm.h>
#include <errno.h>
#include <log.h>
#include <dm/lists.h>
#include <dm/root.h>
#include <linux/err.h>

int cpu_probe_all(void)
{
	struct udevice *cpu;
	int ret;

	ret = uclass_first_device(UCLASS_CPU, &cpu);
	if (ret) {
		debug("%s: No CPU found (err = %d)\n", __func__, ret);
		return ret;
	}

	while (cpu) {
		ret = uclass_next_device(&cpu);
		if (ret) {
			debug("%s: Error while probing CPU (err = %d)\n",
			      __func__, ret);
			return ret;
		}
	}

	return 0;
}

int cpu_is_current(struct udevice *cpu)
{
	struct cpu_ops *ops = cpu_get_ops(cpu);

	if (ops->is_current) {
		if (ops->is_current(cpu))
			return 1;
	}

	return -ENOSYS;
}

struct udevice *cpu_get_current_dev(void)
{
	struct udevice *cpu;
	int ret;

	uclass_foreach_dev_probe(UCLASS_CPU, cpu) {
		if (cpu_is_current(cpu) > 0)
			return cpu;
	}

	/* If can't find current cpu device, use the first dev instead */
	ret = uclass_first_device_err(UCLASS_CPU, &cpu);
	if (ret) {
		debug("%s: Could not get CPU device (err = %d)\n",
		      __func__, ret);
		return NULL;
	}

	return cpu;
}

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_info)
		return -ENOSYS;

	return ops->get_info(dev, info);
}

int cpu_get_count(struct udevice *dev)
{
	struct cpu_ops *ops = cpu_get_ops(dev);

	if (!ops->get_count)
		return -ENOSYS;

	return ops->get_count(dev);
}

int cpu_get_vendor(struct udevice *dev, char *buf, int size)
{
	struct cpu_ops *ops = cpu_get_ops(dev);

	if (!ops->get_vendor)
		return -ENOSYS;

	return ops->get_vendor(dev, buf, size);
}

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;
	ofnode node;
	int ret;

	node = ofnode_path("/cpus");
	if (!ofnode_valid(node))
		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,
};
Commit	Line	Data
83d290c5	1	// SPDX-License-Identifier: GPL-2.0+
11f4dc15 SG	2	/*
	3	* Copyright (C) 2015 Google, Inc
	4	* Written by Simon Glass <[email protected]>
11f4dc15 SG	5	*/
	6
	7	#include <common.h>
	8	#include <cpu.h>
	9	#include <dm.h>
166c3984	10	#include <errno.h>
f7ae49fc	11	#include <log.h>
11f4dc15 SG	12	#include <dm/lists.h>
11f4dc15 SG	13	#include <dm/root.h>
4c809aee	14	#include <linux/err.h>
11f4dc15	15
57370de3 MS	16	int cpu_probe_all(void)
	17	{
	18	struct udevice *cpu;
	19	int ret;
	20
	21	ret = uclass_first_device(UCLASS_CPU, &cpu);
	22	if (ret) {
	23	debug("%s: No CPU found (err = %d)\n", __func__, ret);
	24	return ret;
	25	}
	26
	27	while (cpu) {
	28	ret = uclass_next_device(&cpu);
	29	if (ret) {
	30	debug("%s: Error while probing CPU (err = %d)\n",
	31	__func__, ret);
	32	return ret;
	33	}
	34	}
	35
	36	return 0;
	37	}
	38
4c809aee PF	39	int cpu_is_current(struct udevice *cpu)
	40	{
	41	struct cpu_ops *ops = cpu_get_ops(cpu);
	42
	43	if (ops->is_current) {
	44	if (ops->is_current(cpu))
	45	return 1;
	46	}
	47
	48	return -ENOSYS;
	49	}
	50
	51	struct udevice *cpu_get_current_dev(void)
	52	{
	53	struct udevice *cpu;
	54	int ret;
	55
	56	uclass_foreach_dev_probe(UCLASS_CPU, cpu) {
	57	if (cpu_is_current(cpu) > 0)
	58	return cpu;
	59	}
	60
	61	/* If can't find current cpu device, use the first dev instead */
	62	ret = uclass_first_device_err(UCLASS_CPU, &cpu);
	63	if (ret) {
	64	debug("%s: Could not get CPU device (err = %d)\n",
	65	__func__, ret);
	66	return NULL;
	67	}
	68
	69	return cpu;
	70	}
	71
11f4dc15 SG	72	int cpu_get_desc(struct udevice dev, char buf, int size)
	73	{
	74	struct cpu_ops *ops = cpu_get_ops(dev);
	75
	76	if (!ops->get_desc)
	77	return -ENOSYS;
	78
	79	return ops->get_desc(dev, buf, size);
	80	}
	81
	82	int cpu_get_info(struct udevice dev, struct cpu_info info)
	83	{
	84	struct cpu_ops *ops = cpu_get_ops(dev);
	85
cb5cbfd5	86	if (!ops->get_info)
11f4dc15 SG	87	return -ENOSYS;
	88
	89	return ops->get_info(dev, info);
	90	}
	91
780bfdd3 BM	92	int cpu_get_count(struct udevice *dev)
	93	{
	94	struct cpu_ops *ops = cpu_get_ops(dev);
	95
	96	if (!ops->get_count)
	97	return -ENOSYS;
	98
	99	return ops->get_count(dev);
	100	}
	101
94eaa79c AG	102	int cpu_get_vendor(struct udevice dev, char buf, int size)
	103	{
	104	struct cpu_ops *ops = cpu_get_ops(dev);
	105
	106	if (!ops->get_vendor)
	107	return -ENOSYS;
	108
	109	return ops->get_vendor(dev, buf, size);
	110	}
	111
11f4dc15 SG	112	U_BOOT_DRIVER(cpu_bus) = {
	113	.name = "cpu_bus",
	114	.id = UCLASS_SIMPLE_BUS,
	115	.per_child_platdata_auto_alloc_size = sizeof(struct cpu_platdata),
	116	};
	117
	118	static int uclass_cpu_init(struct uclass *uc)
	119	{
	120	struct udevice *dev;
45a26867	121	ofnode node;
11f4dc15 SG	122	int ret;
11f4dc15 SG	123
45a26867 SG	124	node = ofnode_path("/cpus");
45a26867 SG	125	if (!ofnode_valid(node))
11f4dc15 SG	126	return 0;
	127
	128	ret = device_bind_driver_to_node(dm_root(), "cpu_bus", "cpus", node,
	129	&dev);
	130
	131	return ret;
	132	}
	133
	134	UCLASS_DRIVER(cpu) = {
	135	.id = UCLASS_CPU,
	136	.name = "cpu",
	137	.flags = DM_UC_FLAG_SEQ_ALIAS,
	138	.init = uclass_cpu_init,
	139	};