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
tegra186_power_domain_request(struct power_domain * power_domain)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
tegra186_power_domain_free(struct power_domain * power_domain)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
tegra186_power_domain_common(struct power_domain * power_domain,bool on)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
tegra186_power_domain_on(struct power_domain * power_domain)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
tegra186_power_domain_off(struct power_domain * power_domain)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
tegra186_power_domain_probe(struct udevice * dev)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