git.sur5r.net Git - u-boot/blob - drivers/power/domain/sandbox-power-domain.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 <power-domain-uclass.h>
   9 #include <asm/io.h>
  10 #include <asm/power-domain.h>
  11
  12 #define SANDBOX_POWER_DOMAINS 3
  13
  14 struct sandbox_power_domain {
  15         bool on[SANDBOX_POWER_DOMAINS];
  16 };
  17
  18 static int sandbox_power_domain_request(struct power_domain *power_domain)
  19 {
  20         debug("%s(power_domain=%p)\n", __func__, power_domain);
  21
  22         if (power_domain->id >= SANDBOX_POWER_DOMAINS)
  23                 return -EINVAL;
  24
  25         return 0;
  26 }
  27
  28 static int sandbox_power_domain_free(struct power_domain *power_domain)
  29 {
  30         debug("%s(power_domain=%p)\n", __func__, power_domain);
  31
  32         return 0;
  33 }
  34
  35 static int sandbox_power_domain_on(struct power_domain *power_domain)
  36 {
  37         struct sandbox_power_domain *sbr = dev_get_priv(power_domain->dev);
  38
  39         debug("%s(power_domain=%p)\n", __func__, power_domain);
  40
  41         sbr->on[power_domain->id] = true;
  42
  43         return 0;
  44 }
  45
  46 static int sandbox_power_domain_off(struct power_domain *power_domain)
  47 {
  48         struct sandbox_power_domain *sbr = dev_get_priv(power_domain->dev);
  49
  50         debug("%s(power_domain=%p)\n", __func__, power_domain);
  51
  52         sbr->on[power_domain->id] = false;
  53
  54         return 0;
  55 }
  56
  57 static int sandbox_power_domain_bind(struct udevice *dev)
  58 {
  59         debug("%s(dev=%p)\n", __func__, dev);
  60
  61         return 0;
  62 }
  63
  64 static int sandbox_power_domain_probe(struct udevice *dev)
  65 {
  66         debug("%s(dev=%p)\n", __func__, dev);
  67
  68         return 0;
  69 }
  70
  71 static const struct udevice_id sandbox_power_domain_ids[] = {
  72         { .compatible = "sandbox,power-domain" },
  73         { }
  74 };
  75
  76 struct power_domain_ops sandbox_power_domain_ops = {
  77         .request = sandbox_power_domain_request,
  78         .free = sandbox_power_domain_free,
  79         .on = sandbox_power_domain_on,
  80         .off = sandbox_power_domain_off,
  81 };
  82
  83 U_BOOT_DRIVER(sandbox_power_domain) = {
  84         .name = "sandbox_power_domain",
  85         .id = UCLASS_POWER_DOMAIN,
  86         .of_match = sandbox_power_domain_ids,
  87         .bind = sandbox_power_domain_bind,
  88         .probe = sandbox_power_domain_probe,
  89         .priv_auto_alloc_size = sizeof(struct sandbox_power_domain),
  90         .ops = &sandbox_power_domain_ops,
  91 };
  92
  93 int sandbox_power_domain_query(struct udevice *dev, unsigned long id)
  94 {
  95         struct sandbox_power_domain *sbr = dev_get_priv(dev);
  96
  97         debug("%s(dev=%p, id=%ld)\n", __func__, dev, id);
  98
  99         if (id >= SANDBOX_POWER_DOMAINS)
 100                 return -EINVAL;
 101
 102         return sbr->on[id];
 103 }