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 }; 92