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- // 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>
- #include <dm/device-internal.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->rfree(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);
- }
- #if (CONFIG_IS_ENABLED(OF_CONTROL) && !CONFIG_IS_ENABLED(OF_PLATDATA))
- static int dev_power_domain_ctrl(struct udevice *dev, bool on)
- {
- struct power_domain pd;
- int i, count, ret = 0;
- count = dev_count_phandle_with_args(dev, "power-domains",
- "#power-domain-cells");
- for (i = 0; i < count; i++) {
- ret = power_domain_get_by_index(dev, &pd, i);
- if (ret)
- return ret;
- if (on)
- ret = power_domain_on(&pd);
- else
- ret = power_domain_off(&pd);
- }
- /*
- * power_domain_get() bound the device, thus
- * we must remove it again to prevent unbinding
- * active devices (which would result in unbind
- * error).
- */
- if (count > 0 && !on)
- device_remove(pd.dev, DM_REMOVE_NORMAL);
- return ret;
- }
- int dev_power_domain_on(struct udevice *dev)
- {
- return dev_power_domain_ctrl(dev, true);
- }
- int dev_power_domain_off(struct udevice *dev)
- {
- return dev_power_domain_ctrl(dev, false);
- }
- #endif
- UCLASS_DRIVER(power_domain) = {
- .id = UCLASS_POWER_DOMAIN,
- .name = "power_domain",
- };
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