1*4882a593Smuzhiyun /*
2*4882a593Smuzhiyun * Copyright (C) 2017 Álvaro Fernández Rojas <noltari@gmail.com>
3*4882a593Smuzhiyun *
4*4882a593Smuzhiyun * SPDX-License-Identifier: GPL-2.0+
5*4882a593Smuzhiyun */
6*4882a593Smuzhiyun
7*4882a593Smuzhiyun #include <common.h>
8*4882a593Smuzhiyun #include <dm.h>
9*4882a593Smuzhiyun #include <power-domain-uclass.h>
10*4882a593Smuzhiyun #include <asm/io.h>
11*4882a593Smuzhiyun
12*4882a593Smuzhiyun #define MAX_DOMAINS 32
13*4882a593Smuzhiyun
14*4882a593Smuzhiyun struct bcm6328_power_domain {
15*4882a593Smuzhiyun void __iomem *regs;
16*4882a593Smuzhiyun };
17*4882a593Smuzhiyun
bcm6328_power_domain_request(struct power_domain * power_domain)18*4882a593Smuzhiyun static int bcm6328_power_domain_request(struct power_domain *power_domain)
19*4882a593Smuzhiyun {
20*4882a593Smuzhiyun if (power_domain->id >= MAX_DOMAINS)
21*4882a593Smuzhiyun return -EINVAL;
22*4882a593Smuzhiyun
23*4882a593Smuzhiyun return 0;
24*4882a593Smuzhiyun }
25*4882a593Smuzhiyun
bcm6328_power_domain_free(struct power_domain * power_domain)26*4882a593Smuzhiyun static int bcm6328_power_domain_free(struct power_domain *power_domain)
27*4882a593Smuzhiyun {
28*4882a593Smuzhiyun return 0;
29*4882a593Smuzhiyun }
30*4882a593Smuzhiyun
bcm6328_power_domain_on(struct power_domain * power_domain)31*4882a593Smuzhiyun static int bcm6328_power_domain_on(struct power_domain *power_domain)
32*4882a593Smuzhiyun {
33*4882a593Smuzhiyun struct bcm6328_power_domain *priv = dev_get_priv(power_domain->dev);
34*4882a593Smuzhiyun
35*4882a593Smuzhiyun clrbits_be32(priv->regs, BIT(power_domain->id));
36*4882a593Smuzhiyun
37*4882a593Smuzhiyun return 0;
38*4882a593Smuzhiyun }
39*4882a593Smuzhiyun
bcm6328_power_domain_off(struct power_domain * power_domain)40*4882a593Smuzhiyun static int bcm6328_power_domain_off(struct power_domain *power_domain)
41*4882a593Smuzhiyun {
42*4882a593Smuzhiyun struct bcm6328_power_domain *priv = dev_get_priv(power_domain->dev);
43*4882a593Smuzhiyun
44*4882a593Smuzhiyun setbits_be32(priv->regs, BIT(power_domain->id));
45*4882a593Smuzhiyun
46*4882a593Smuzhiyun return 0;
47*4882a593Smuzhiyun }
48*4882a593Smuzhiyun
bcm6328_power_domain_probe(struct udevice * dev)49*4882a593Smuzhiyun static int bcm6328_power_domain_probe(struct udevice *dev)
50*4882a593Smuzhiyun {
51*4882a593Smuzhiyun struct bcm6328_power_domain *priv = dev_get_priv(dev);
52*4882a593Smuzhiyun fdt_addr_t addr;
53*4882a593Smuzhiyun fdt_size_t size;
54*4882a593Smuzhiyun
55*4882a593Smuzhiyun addr = devfdt_get_addr_size_index(dev, 0, &size);
56*4882a593Smuzhiyun if (addr == FDT_ADDR_T_NONE)
57*4882a593Smuzhiyun return -EINVAL;
58*4882a593Smuzhiyun
59*4882a593Smuzhiyun priv->regs = ioremap(addr, size);
60*4882a593Smuzhiyun
61*4882a593Smuzhiyun return 0;
62*4882a593Smuzhiyun }
63*4882a593Smuzhiyun
64*4882a593Smuzhiyun static const struct udevice_id bcm6328_power_domain_ids[] = {
65*4882a593Smuzhiyun { .compatible = "brcm,bcm6328-power-domain" },
66*4882a593Smuzhiyun { /* sentinel */ }
67*4882a593Smuzhiyun };
68*4882a593Smuzhiyun
69*4882a593Smuzhiyun struct power_domain_ops bcm6328_power_domain_ops = {
70*4882a593Smuzhiyun .free = bcm6328_power_domain_free,
71*4882a593Smuzhiyun .off = bcm6328_power_domain_off,
72*4882a593Smuzhiyun .on = bcm6328_power_domain_on,
73*4882a593Smuzhiyun .request = bcm6328_power_domain_request,
74*4882a593Smuzhiyun };
75*4882a593Smuzhiyun
76*4882a593Smuzhiyun U_BOOT_DRIVER(bcm6328_power_domain) = {
77*4882a593Smuzhiyun .name = "bcm6328_power_domain",
78*4882a593Smuzhiyun .id = UCLASS_POWER_DOMAIN,
79*4882a593Smuzhiyun .of_match = bcm6328_power_domain_ids,
80*4882a593Smuzhiyun .ops = &bcm6328_power_domain_ops,
81*4882a593Smuzhiyun .priv_auto_alloc_size = sizeof(struct bcm6328_power_domain),
82*4882a593Smuzhiyun .probe = bcm6328_power_domain_probe,
83*4882a593Smuzhiyun };
84