git.sur5r.net Git - u-boot/blob - drivers/power/domain/tegra186-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 <misc.h>
   9 #include <power-domain-uclass.h>
  10 #include <asm/arch-tegra/bpmp_abi.h>
  11
  12 #define UPDATE  BIT(0)
  13 #define ON      BIT(1)
  14
  15 static int tegra186_power_domain_request(struct power_domain *power_domain)
  16 {
  17         debug("%s(power_domain=%p) (dev=%p, id=%lu)\n", __func__,
  18               power_domain, power_domain->dev, power_domain->id);
  19
  20         return 0;
  21 }
  22
  23 static int tegra186_power_domain_free(struct power_domain *power_domain)
  24 {
  25         debug("%s(power_domain=%p) (dev=%p, id=%lu)\n", __func__,
  26               power_domain, power_domain->dev, power_domain->id);
  27
  28         return 0;
  29 }
  30
  31 static int tegra186_power_domain_common(struct power_domain *power_domain,
  32                                         bool on)
  33 {
  34         struct mrq_pg_update_state_request req;
  35         int on_state = on ? ON : 0;
  36         int ret;
  37
  38         req.partition_id = power_domain->id;
  39         req.logic_state = UPDATE | on_state;
  40         req.sram_state = UPDATE | on_state;
  41         /*
  42          * Drivers manage their own clocks so they don't get out of sync, and
  43          * since some power domains have many clocks, only a subset of which
  44          * are actually needed depending on use-case.
  45          */
  46         req.clock_state = UPDATE;
  47
  48         ret = misc_call(power_domain->dev->parent, MRQ_PG_UPDATE_STATE, &req,
  49                         sizeof(req), NULL, 0);
  50         if (ret < 0)
  51                 return ret;
  52
  53         return 0;
  54 }
  55
  56 static int tegra186_power_domain_on(struct power_domain *power_domain)
  57 {
  58         debug("%s(power_domain=%p) (dev=%p, id=%lu)\n", __func__,
  59               power_domain, power_domain->dev, power_domain->id);
  60
  61         return tegra186_power_domain_common(power_domain, true);
  62 }
  63
  64 static int tegra186_power_domain_off(struct power_domain *power_domain)
  65 {
  66         debug("%s(power_domain=%p) (dev=%p, id=%lu)\n", __func__,
  67               power_domain, power_domain->dev, power_domain->id);
  68
  69         return tegra186_power_domain_common(power_domain, false);
  70 }
  71
  72 struct power_domain_ops tegra186_power_domain_ops = {
  73         .request = tegra186_power_domain_request,
  74         .free = tegra186_power_domain_free,
  75         .on = tegra186_power_domain_on,
  76         .off = tegra186_power_domain_off,
  77 };
  78
  79 static int tegra186_power_domain_probe(struct udevice *dev)
  80 {
  81         debug("%s(dev=%p)\n", __func__, dev);
  82
  83         return 0;
  84 }
  85
  86 U_BOOT_DRIVER(tegra186_power_domain) = {
  87         .name = "tegra186_power_domain",
  88         .id = UCLASS_POWER_DOMAIN,
  89         .probe = tegra186_power_domain_probe,
  90         .ops = &tegra186_power_domain_ops,
  91 };