mirror of
https://github.com/AsahiLinux/u-boot
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9c1e982218
Add this new API to power on multiple domains attached to a device. Signed-off-by: Peng Fan <peng.fan@nxp.com> Reviewed-by: Lokesh Vutla <lokeshvutla@ti.com> Changed to static inline and added a condition into C file: Signed-off-by: Simon Glass <sjg@chromium.org>
134 lines
3 KiB
C
134 lines
3 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* Copyright (c) 2016, NVIDIA CORPORATION.
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*/
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#include <common.h>
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#include <dm.h>
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#include <power-domain.h>
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#include <power-domain-uclass.h>
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static inline struct power_domain_ops *power_domain_dev_ops(struct udevice *dev)
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{
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return (struct power_domain_ops *)dev->driver->ops;
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}
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static int power_domain_of_xlate_default(struct power_domain *power_domain,
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struct ofnode_phandle_args *args)
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{
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debug("%s(power_domain=%p)\n", __func__, power_domain);
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if (args->args_count != 1) {
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debug("Invalid args_count: %d\n", args->args_count);
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return -EINVAL;
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}
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power_domain->id = args->args[0];
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return 0;
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}
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int power_domain_get_by_index(struct udevice *dev,
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struct power_domain *power_domain, int index)
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{
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struct ofnode_phandle_args args;
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int ret;
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struct udevice *dev_power_domain;
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struct power_domain_ops *ops;
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debug("%s(dev=%p, power_domain=%p)\n", __func__, dev, power_domain);
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ret = dev_read_phandle_with_args(dev, "power-domains",
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"#power-domain-cells", 0, index,
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&args);
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if (ret) {
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debug("%s: dev_read_phandle_with_args failed: %d\n",
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__func__, ret);
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return ret;
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}
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ret = uclass_get_device_by_ofnode(UCLASS_POWER_DOMAIN, args.node,
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&dev_power_domain);
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if (ret) {
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debug("%s: uclass_get_device_by_ofnode failed: %d\n",
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__func__, ret);
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return ret;
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}
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ops = power_domain_dev_ops(dev_power_domain);
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power_domain->dev = dev_power_domain;
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if (ops->of_xlate)
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ret = ops->of_xlate(power_domain, &args);
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else
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ret = power_domain_of_xlate_default(power_domain, &args);
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if (ret) {
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debug("of_xlate() failed: %d\n", ret);
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return ret;
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}
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ret = ops->request(power_domain);
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if (ret) {
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debug("ops->request() failed: %d\n", ret);
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return ret;
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}
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return 0;
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}
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int power_domain_get(struct udevice *dev, struct power_domain *power_domain)
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{
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return power_domain_get_by_index(dev, power_domain, 0);
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}
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int power_domain_free(struct power_domain *power_domain)
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{
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struct power_domain_ops *ops = power_domain_dev_ops(power_domain->dev);
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debug("%s(power_domain=%p)\n", __func__, power_domain);
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return ops->free(power_domain);
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}
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int power_domain_on(struct power_domain *power_domain)
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{
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struct power_domain_ops *ops = power_domain_dev_ops(power_domain->dev);
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debug("%s(power_domain=%p)\n", __func__, power_domain);
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return ops->on(power_domain);
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}
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int power_domain_off(struct power_domain *power_domain)
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{
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struct power_domain_ops *ops = power_domain_dev_ops(power_domain->dev);
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debug("%s(power_domain=%p)\n", __func__, power_domain);
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return ops->off(power_domain);
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}
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#if !CONFIG_IS_ENABLED(OF_PLATDATA)
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int dev_power_domain_on(struct udevice *dev)
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{
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struct power_domain pd;
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int i, count, ret;
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count = dev_count_phandle_with_args(dev, "power-domains",
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"#power-domain-cells");
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for (i = 0; i < count; i++) {
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ret = power_domain_get_by_index(dev, &pd, i);
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if (ret)
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return ret;
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ret = power_domain_on(&pd);
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if (ret)
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return ret;
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}
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return 0;
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}
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#endif
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UCLASS_DRIVER(power_domain) = {
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.id = UCLASS_POWER_DOMAIN,
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.name = "power_domain",
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};
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