mirror of
https://github.com/AsahiLinux/u-boot
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109 lines
2.1 KiB
C
109 lines
2.1 KiB
C
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/*
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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 <reset-uclass.h>
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#include <asm/io.h>
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#include <asm/reset.h>
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#define SANDBOX_RESET_SIGNALS 3
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struct sandbox_reset_signal {
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bool asserted;
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};
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struct sandbox_reset {
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struct sandbox_reset_signal signals[SANDBOX_RESET_SIGNALS];
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};
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static int sandbox_reset_request(struct reset_ctl *reset_ctl)
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{
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debug("%s(reset_ctl=%p)\n", __func__, reset_ctl);
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if (reset_ctl->id >= SANDBOX_RESET_SIGNALS)
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return -EINVAL;
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return 0;
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}
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static int sandbox_reset_free(struct reset_ctl *reset_ctl)
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{
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debug("%s(reset_ctl=%p)\n", __func__, reset_ctl);
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return 0;
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}
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static int sandbox_reset_assert(struct reset_ctl *reset_ctl)
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{
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struct sandbox_reset *sbr = dev_get_priv(reset_ctl->dev);
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debug("%s(reset_ctl=%p)\n", __func__, reset_ctl);
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sbr->signals[reset_ctl->id].asserted = true;
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return 0;
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}
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static int sandbox_reset_deassert(struct reset_ctl *reset_ctl)
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{
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struct sandbox_reset *sbr = dev_get_priv(reset_ctl->dev);
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debug("%s(reset_ctl=%p)\n", __func__, reset_ctl);
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sbr->signals[reset_ctl->id].asserted = false;
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return 0;
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}
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static int sandbox_reset_bind(struct udevice *dev)
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{
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debug("%s(dev=%p)\n", __func__, dev);
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return 0;
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}
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static int sandbox_reset_probe(struct udevice *dev)
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{
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debug("%s(dev=%p)\n", __func__, dev);
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return 0;
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}
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static const struct udevice_id sandbox_reset_ids[] = {
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{ .compatible = "sandbox,reset-ctl" },
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{ }
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};
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struct reset_ops sandbox_reset_reset_ops = {
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.request = sandbox_reset_request,
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.free = sandbox_reset_free,
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.rst_assert = sandbox_reset_assert,
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.rst_deassert = sandbox_reset_deassert,
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};
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U_BOOT_DRIVER(sandbox_reset) = {
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.name = "sandbox_reset",
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.id = UCLASS_RESET,
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.of_match = sandbox_reset_ids,
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.bind = sandbox_reset_bind,
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.probe = sandbox_reset_probe,
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.priv_auto_alloc_size = sizeof(struct sandbox_reset),
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.ops = &sandbox_reset_reset_ops,
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};
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int sandbox_reset_query(struct udevice *dev, unsigned long id)
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{
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struct sandbox_reset *sbr = dev_get_priv(dev);
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debug("%s(dev=%p, id=%ld)\n", __func__, dev, id);
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if (id >= SANDBOX_RESET_SIGNALS)
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return -EINVAL;
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return sbr->signals[id].asserted;
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}
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