1 /*
2 * Copyright (c) 2016, NVIDIA CORPORATION.
3 *
4 * SPDX-License-Identifier: GPL-2.0
5 */
6
7 #include <common.h>
8 #include <dm.h>
9 #include <misc.h>
10 #include <power-domain-uclass.h>
11 #include <asm/arch-tegra/bpmp_abi.h>
12
13 #define UPDATE BIT(0)
14 #define ON BIT(1)
15
tegra186_power_domain_request(struct power_domain * power_domain)16 static int tegra186_power_domain_request(struct power_domain *power_domain)
17 {
18 debug("%s(power_domain=%p) (dev=%p, id=%lu)\n", __func__,
19 power_domain, power_domain->dev, power_domain->id);
20
21 return 0;
22 }
23
tegra186_power_domain_free(struct power_domain * power_domain)24 static int tegra186_power_domain_free(struct power_domain *power_domain)
25 {
26 debug("%s(power_domain=%p) (dev=%p, id=%lu)\n", __func__,
27 power_domain, power_domain->dev, power_domain->id);
28
29 return 0;
30 }
31
tegra186_power_domain_common(struct power_domain * power_domain,bool on)32 static int tegra186_power_domain_common(struct power_domain *power_domain,
33 bool on)
34 {
35 struct mrq_pg_update_state_request req;
36 int on_state = on ? ON : 0;
37 int ret;
38
39 req.partition_id = power_domain->id;
40 req.logic_state = UPDATE | on_state;
41 req.sram_state = UPDATE | on_state;
42 /*
43 * Drivers manage their own clocks so they don't get out of sync, and
44 * since some power domains have many clocks, only a subset of which
45 * are actually needed depending on use-case.
46 */
47 req.clock_state = UPDATE;
48
49 ret = misc_call(power_domain->dev->parent, MRQ_PG_UPDATE_STATE, &req,
50 sizeof(req), NULL, 0);
51 if (ret < 0)
52 return ret;
53
54 return 0;
55 }
56
tegra186_power_domain_on(struct power_domain * power_domain)57 static int tegra186_power_domain_on(struct power_domain *power_domain)
58 {
59 debug("%s(power_domain=%p) (dev=%p, id=%lu)\n", __func__,
60 power_domain, power_domain->dev, power_domain->id);
61
62 return tegra186_power_domain_common(power_domain, true);
63 }
64
tegra186_power_domain_off(struct power_domain * power_domain)65 static int tegra186_power_domain_off(struct power_domain *power_domain)
66 {
67 debug("%s(power_domain=%p) (dev=%p, id=%lu)\n", __func__,
68 power_domain, power_domain->dev, power_domain->id);
69
70 return tegra186_power_domain_common(power_domain, false);
71 }
72
73 struct power_domain_ops tegra186_power_domain_ops = {
74 .request = tegra186_power_domain_request,
75 .free = tegra186_power_domain_free,
76 .on = tegra186_power_domain_on,
77 .off = tegra186_power_domain_off,
78 };
79
tegra186_power_domain_probe(struct udevice * dev)80 static int tegra186_power_domain_probe(struct udevice *dev)
81 {
82 debug("%s(dev=%p)\n", __func__, dev);
83
84 return 0;
85 }
86
87 U_BOOT_DRIVER(tegra186_power_domain) = {
88 .name = "tegra186_power_domain",
89 .id = UCLASS_POWER_DOMAIN,
90 .probe = tegra186_power_domain_probe,
91 .ops = &tegra186_power_domain_ops,
92 };
93