mirror of
https://github.com/AsahiLinux/u-boot
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83d290c56f
When U-Boot started using SPDX tags we were among the early adopters and there weren't a lot of other examples to borrow from. So we picked the area of the file that usually had a full license text and replaced it with an appropriate SPDX-License-Identifier: entry. Since then, the Linux Kernel has adopted SPDX tags and they place it as the very first line in a file (except where shebangs are used, then it's second line) and with slightly different comment styles than us. In part due to community overlap, in part due to better tag visibility and in part for other minor reasons, switch over to that style. This commit changes all instances where we have a single declared license in the tag as both the before and after are identical in tag contents. There's also a few places where I found we did not have a tag and have introduced one. Signed-off-by: Tom Rini <trini@konsulko.com>
221 lines
4.4 KiB
C
221 lines
4.4 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 <fdtdec.h>
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#include <reset.h>
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#include <reset-uclass.h>
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static inline struct reset_ops *reset_dev_ops(struct udevice *dev)
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{
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return (struct reset_ops *)dev->driver->ops;
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}
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static int reset_of_xlate_default(struct reset_ctl *reset_ctl,
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struct ofnode_phandle_args *args)
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{
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debug("%s(reset_ctl=%p)\n", __func__, reset_ctl);
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if (args->args_count != 1) {
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debug("Invaild args_count: %d\n", args->args_count);
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return -EINVAL;
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}
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reset_ctl->id = args->args[0];
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return 0;
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}
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int reset_get_by_index(struct udevice *dev, int index,
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struct reset_ctl *reset_ctl)
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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_reset;
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struct reset_ops *ops;
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debug("%s(dev=%p, index=%d, reset_ctl=%p)\n", __func__, dev, index,
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reset_ctl);
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reset_ctl->dev = NULL;
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ret = dev_read_phandle_with_args(dev, "resets", "#reset-cells", 0,
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index, &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_ofnode(UCLASS_RESET, args.node,
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&dev_reset);
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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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debug("%s %d\n", ofnode_get_name(args.node), args.args[0]);
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return ret;
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}
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ops = reset_dev_ops(dev_reset);
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reset_ctl->dev = dev_reset;
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if (ops->of_xlate)
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ret = ops->of_xlate(reset_ctl, &args);
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else
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ret = reset_of_xlate_default(reset_ctl, &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(reset_ctl);
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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 reset_get_bulk(struct udevice *dev, struct reset_ctl_bulk *bulk)
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{
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int i, ret, err, count;
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bulk->count = 0;
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count = dev_count_phandle_with_args(dev, "resets", "#reset-cells");
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if (count < 1)
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return count;
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bulk->resets = devm_kcalloc(dev, count, sizeof(struct reset_ctl),
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GFP_KERNEL);
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if (!bulk->resets)
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return -ENOMEM;
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for (i = 0; i < count; i++) {
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ret = reset_get_by_index(dev, i, &bulk->resets[i]);
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if (ret < 0)
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goto bulk_get_err;
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++bulk->count;
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}
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return 0;
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bulk_get_err:
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err = reset_release_all(bulk->resets, bulk->count);
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if (err)
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debug("%s: could release all resets for %p\n",
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__func__, dev);
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return ret;
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}
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int reset_get_by_name(struct udevice *dev, const char *name,
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struct reset_ctl *reset_ctl)
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{
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int index;
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debug("%s(dev=%p, name=%s, reset_ctl=%p)\n", __func__, dev, name,
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reset_ctl);
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reset_ctl->dev = NULL;
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index = dev_read_stringlist_search(dev, "reset-names", name);
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if (index < 0) {
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debug("fdt_stringlist_search() failed: %d\n", index);
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return index;
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}
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return reset_get_by_index(dev, index, reset_ctl);
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}
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int reset_request(struct reset_ctl *reset_ctl)
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{
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struct reset_ops *ops = reset_dev_ops(reset_ctl->dev);
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debug("%s(reset_ctl=%p)\n", __func__, reset_ctl);
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return ops->request(reset_ctl);
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}
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int reset_free(struct reset_ctl *reset_ctl)
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{
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struct reset_ops *ops = reset_dev_ops(reset_ctl->dev);
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debug("%s(reset_ctl=%p)\n", __func__, reset_ctl);
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return ops->free(reset_ctl);
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}
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int reset_assert(struct reset_ctl *reset_ctl)
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{
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struct reset_ops *ops = reset_dev_ops(reset_ctl->dev);
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debug("%s(reset_ctl=%p)\n", __func__, reset_ctl);
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return ops->rst_assert(reset_ctl);
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}
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int reset_assert_bulk(struct reset_ctl_bulk *bulk)
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{
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int i, ret;
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for (i = 0; i < bulk->count; i++) {
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ret = reset_assert(&bulk->resets[i]);
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if (ret < 0)
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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 reset_deassert(struct reset_ctl *reset_ctl)
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{
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struct reset_ops *ops = reset_dev_ops(reset_ctl->dev);
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debug("%s(reset_ctl=%p)\n", __func__, reset_ctl);
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return ops->rst_deassert(reset_ctl);
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}
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int reset_deassert_bulk(struct reset_ctl_bulk *bulk)
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{
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int i, ret;
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for (i = 0; i < bulk->count; i++) {
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ret = reset_deassert(&bulk->resets[i]);
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if (ret < 0)
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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 reset_release_all(struct reset_ctl *reset_ctl, int count)
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{
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int i, ret;
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for (i = 0; i < count; i++) {
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debug("%s(reset_ctl[%d]=%p)\n", __func__, i, &reset_ctl[i]);
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/* check if reset has been previously requested */
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if (!reset_ctl[i].dev)
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continue;
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ret = reset_assert(&reset_ctl[i]);
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if (ret)
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return ret;
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ret = reset_free(&reset_ctl[i]);
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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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UCLASS_DRIVER(reset) = {
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.id = UCLASS_RESET,
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.name = "reset",
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};
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