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e160f7d430
At present devices use a simple integer offset to record the device tree node associated with the device. In preparation for supporting a live device tree, which uses a node pointer instead, refactor existing code to access this field through an inline function. Signed-off-by: Simon Glass <sjg@chromium.org>
113 lines
2.6 KiB
C
113 lines
2.6 KiB
C
/*
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* Copyright (c) 2016, NVIDIA CORPORATION.
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*
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* SPDX-License-Identifier: GPL-2.0
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*/
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#include <common.h>
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#include <dm.h>
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#include <fdtdec.h>
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#include <power-domain.h>
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#include <power-domain-uclass.h>
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DECLARE_GLOBAL_DATA_PTR;
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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 fdtdec_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(struct udevice *dev, struct power_domain *power_domain)
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{
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struct fdtdec_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 = fdtdec_parse_phandle_with_args(gd->fdt_blob, dev_of_offset(dev),
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"power-domains",
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"#power-domain-cells", 0, 0,
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&args);
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if (ret) {
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debug("%s: fdtdec_parse_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_of_offset(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_of_offset 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_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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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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