LXR uboot/drivers/reset/sandbox-reset.c

   1// SPDX-License-Identifier: GPL-2.0
   2/*
   3 * Copyright (c) 2016, NVIDIA CORPORATION.
   4 */
   5
   6#include <common.h>
   7#include <dm.h>
   8#include <reset-uclass.h>
   9#include <asm/io.h>
  10#include <asm/reset.h>
  11
  12#define SANDBOX_RESET_SIGNALS 101
  13
  14struct sandbox_reset_signal {
  15        bool asserted;
  16};
  17
  18struct sandbox_reset {
  19        struct sandbox_reset_signal signals[SANDBOX_RESET_SIGNALS];
  20};
  21
  22static int sandbox_reset_request(struct reset_ctl *reset_ctl)
  23{
  24        debug("%s(reset_ctl=%p)\n", __func__, reset_ctl);
  25
  26        if (reset_ctl->id >= SANDBOX_RESET_SIGNALS)
  27                return -EINVAL;
  28
  29        return 0;
  30}
  31
  32static int sandbox_reset_free(struct reset_ctl *reset_ctl)
  33{
  34        debug("%s(reset_ctl=%p)\n", __func__, reset_ctl);
  35
  36        return 0;
  37}
  38
  39static int sandbox_reset_assert(struct reset_ctl *reset_ctl)
  40{
  41        struct sandbox_reset *sbr = dev_get_priv(reset_ctl->dev);
  42
  43        debug("%s(reset_ctl=%p)\n", __func__, reset_ctl);
  44
  45        sbr->signals[reset_ctl->id].asserted = true;
  46
  47        return 0;
  48}
  49
  50static int sandbox_reset_deassert(struct reset_ctl *reset_ctl)
  51{
  52        struct sandbox_reset *sbr = dev_get_priv(reset_ctl->dev);
  53
  54        debug("%s(reset_ctl=%p)\n", __func__, reset_ctl);
  55
  56        sbr->signals[reset_ctl->id].asserted = false;
  57
  58        return 0;
  59}
  60
  61static int sandbox_reset_bind(struct udevice *dev)
  62{
  63        debug("%s(dev=%p)\n", __func__, dev);
  64
  65        return 0;
  66}
  67
  68static int sandbox_reset_probe(struct udevice *dev)
  69{
  70        debug("%s(dev=%p)\n", __func__, dev);
  71
  72        return 0;
  73}
  74
  75static const struct udevice_id sandbox_reset_ids[] = {
  76        { .compatible = "sandbox,reset-ctl" },
  77        { }
  78};
  79
  80struct reset_ops sandbox_reset_reset_ops = {
  81        .request = sandbox_reset_request,
  82        .free = sandbox_reset_free,
  83        .rst_assert = sandbox_reset_assert,
  84        .rst_deassert = sandbox_reset_deassert,
  85};
  86
  87U_BOOT_DRIVER(sandbox_reset) = {
  88        .name = "sandbox_reset",
  89        .id = UCLASS_RESET,
  90        .of_match = sandbox_reset_ids,
  91        .bind = sandbox_reset_bind,
  92        .probe = sandbox_reset_probe,
  93        .priv_auto_alloc_size = sizeof(struct sandbox_reset),
  94        .ops = &sandbox_reset_reset_ops,
  95};
  96
  97int sandbox_reset_query(struct udevice *dev, unsigned long id)
  98{
  99        struct sandbox_reset *sbr = dev_get_priv(dev);
 100
 101        debug("%s(dev=%p, id=%ld)\n", __func__, dev, id);
 102
 103        if (id >= SANDBOX_RESET_SIGNALS)
 104                return -EINVAL;
 105
 106        return sbr->signals[id].asserted;
 107}
 108