114 lines
2.6 KiB
C
114 lines
2.6 KiB
C
// SPDX-License-Identifier: GPL-2.0
|
|
/*
|
|
* Copyright (c) 2016, NVIDIA CORPORATION.
|
|
*/
|
|
|
|
#include <common.h>
|
|
#include <dm.h>
|
|
#include <power-domain.h>
|
|
#include <power-domain-uclass.h>
|
|
|
|
static inline struct power_domain_ops *power_domain_dev_ops(struct udevice *dev)
|
|
{
|
|
return (struct power_domain_ops *)dev->driver->ops;
|
|
}
|
|
|
|
static int power_domain_of_xlate_default(struct power_domain *power_domain,
|
|
struct ofnode_phandle_args *args)
|
|
{
|
|
debug("%s(power_domain=%p)\n", __func__, power_domain);
|
|
|
|
if (args->args_count != 1) {
|
|
debug("Invalid args_count: %d\n", args->args_count);
|
|
return -EINVAL;
|
|
}
|
|
|
|
power_domain->id = args->args[0];
|
|
|
|
return 0;
|
|
}
|
|
|
|
int power_domain_get_by_index(struct udevice *dev,
|
|
struct power_domain *power_domain, int index)
|
|
{
|
|
struct ofnode_phandle_args args;
|
|
int ret;
|
|
struct udevice *dev_power_domain;
|
|
struct power_domain_ops *ops;
|
|
|
|
debug("%s(dev=%p, power_domain=%p)\n", __func__, dev, power_domain);
|
|
|
|
ret = dev_read_phandle_with_args(dev, "power-domains",
|
|
"#power-domain-cells", 0, index,
|
|
&args);
|
|
if (ret) {
|
|
debug("%s: dev_read_phandle_with_args failed: %d\n",
|
|
__func__, ret);
|
|
return ret;
|
|
}
|
|
|
|
ret = uclass_get_device_by_ofnode(UCLASS_POWER_DOMAIN, args.node,
|
|
&dev_power_domain);
|
|
if (ret) {
|
|
debug("%s: uclass_get_device_by_ofnode failed: %d\n",
|
|
__func__, ret);
|
|
return ret;
|
|
}
|
|
ops = power_domain_dev_ops(dev_power_domain);
|
|
|
|
power_domain->dev = dev_power_domain;
|
|
if (ops->of_xlate)
|
|
ret = ops->of_xlate(power_domain, &args);
|
|
else
|
|
ret = power_domain_of_xlate_default(power_domain, &args);
|
|
if (ret) {
|
|
debug("of_xlate() failed: %d\n", ret);
|
|
return ret;
|
|
}
|
|
|
|
ret = ops->request(power_domain);
|
|
if (ret) {
|
|
debug("ops->request() failed: %d\n", ret);
|
|
return ret;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
int power_domain_get(struct udevice *dev, struct power_domain *power_domain)
|
|
{
|
|
return power_domain_get_by_index(dev, power_domain, 0);
|
|
}
|
|
|
|
int power_domain_free(struct power_domain *power_domain)
|
|
{
|
|
struct power_domain_ops *ops = power_domain_dev_ops(power_domain->dev);
|
|
|
|
debug("%s(power_domain=%p)\n", __func__, power_domain);
|
|
|
|
return ops->free(power_domain);
|
|
}
|
|
|
|
int power_domain_on(struct power_domain *power_domain)
|
|
{
|
|
struct power_domain_ops *ops = power_domain_dev_ops(power_domain->dev);
|
|
|
|
debug("%s(power_domain=%p)\n", __func__, power_domain);
|
|
|
|
return ops->on(power_domain);
|
|
}
|
|
|
|
int power_domain_off(struct power_domain *power_domain)
|
|
{
|
|
struct power_domain_ops *ops = power_domain_dev_ops(power_domain->dev);
|
|
|
|
debug("%s(power_domain=%p)\n", __func__, power_domain);
|
|
|
|
return ops->off(power_domain);
|
|
}
|
|
|
|
UCLASS_DRIVER(power_domain) = {
|
|
.id = UCLASS_POWER_DOMAIN,
|
|
.name = "power_domain",
|
|
};
|