2 * Actions Semi Owl Smart Power System (SPS)
4 * Copyright 2012 Actions Semi Inc.
5 * Author: Actions Semi, Inc.
7 * Copyright (c) 2017 Andreas Färber
9 * This program is free software; you can redistribute it and/or modify it
10 * under the terms of the GNU General Public License as published by the
11 * Free Software Foundation; either version 2 of the License, or (at your
12 * option) any later version.
15 #include <linux/of_address.h>
16 #include <linux/of_platform.h>
17 #include <linux/pm_domain.h>
18 #include <linux/soc/actions/owl-sps.h>
19 #include <dt-bindings/power/owl-s500-powergate.h>
20 #include <dt-bindings/power/owl-s700-powergate.h>
22 struct owl_sps_domain_info {
26 unsigned int genpd_flags;
31 const struct owl_sps_domain_info *domains;
36 const struct owl_sps_info *info;
38 struct genpd_onecell_data genpd_data;
39 struct generic_pm_domain *domains[];
42 #define to_owl_pd(gpd) container_of(gpd, struct owl_sps_domain, genpd)
44 struct owl_sps_domain {
45 struct generic_pm_domain genpd;
46 const struct owl_sps_domain_info *info;
50 static int owl_sps_set_power(struct owl_sps_domain *pd, bool enable)
52 u32 pwr_mask, ack_mask;
54 ack_mask = BIT(pd->info->ack_bit);
55 pwr_mask = BIT(pd->info->pwr_bit);
57 return owl_sps_set_pg(pd->sps->base, pwr_mask, ack_mask, enable);
60 static int owl_sps_power_on(struct generic_pm_domain *domain)
62 struct owl_sps_domain *pd = to_owl_pd(domain);
64 dev_dbg(pd->sps->dev, "%s power on", pd->info->name);
66 return owl_sps_set_power(pd, true);
69 static int owl_sps_power_off(struct generic_pm_domain *domain)
71 struct owl_sps_domain *pd = to_owl_pd(domain);
73 dev_dbg(pd->sps->dev, "%s power off", pd->info->name);
75 return owl_sps_set_power(pd, false);
78 static int owl_sps_init_domain(struct owl_sps *sps, int index)
80 struct owl_sps_domain *pd;
82 pd = devm_kzalloc(sps->dev, sizeof(*pd), GFP_KERNEL);
86 pd->info = &sps->info->domains[index];
89 pd->genpd.name = pd->info->name;
90 pd->genpd.power_on = owl_sps_power_on;
91 pd->genpd.power_off = owl_sps_power_off;
92 pd->genpd.flags = pd->info->genpd_flags;
93 pm_genpd_init(&pd->genpd, NULL, false);
95 sps->genpd_data.domains[index] = &pd->genpd;
100 static int owl_sps_probe(struct platform_device *pdev)
102 const struct of_device_id *match;
103 const struct owl_sps_info *sps_info;
107 if (!pdev->dev.of_node) {
108 dev_err(&pdev->dev, "no device node\n");
112 match = of_match_device(pdev->dev.driver->of_match_table, &pdev->dev);
113 if (!match || !match->data) {
114 dev_err(&pdev->dev, "unknown compatible or missing data\n");
118 sps_info = match->data;
120 sps = devm_kzalloc(&pdev->dev,
121 struct_size(sps, domains, sps_info->num_domains),
126 sps->base = of_io_request_and_map(pdev->dev.of_node, 0, "owl-sps");
127 if (IS_ERR(sps->base)) {
128 dev_err(&pdev->dev, "failed to map sps registers\n");
129 return PTR_ERR(sps->base);
132 sps->dev = &pdev->dev;
133 sps->info = sps_info;
134 sps->genpd_data.domains = sps->domains;
135 sps->genpd_data.num_domains = sps_info->num_domains;
137 for (i = 0; i < sps_info->num_domains; i++) {
138 ret = owl_sps_init_domain(sps, i);
143 ret = of_genpd_add_provider_onecell(pdev->dev.of_node, &sps->genpd_data);
145 dev_err(&pdev->dev, "failed to add provider (%d)", ret);
152 static const struct owl_sps_domain_info s500_sps_domains[] = {
172 .genpd_flags = GENPD_FLAG_ALWAYS_ON,
178 .genpd_flags = GENPD_FLAG_ALWAYS_ON,
202 static const struct owl_sps_info s500_sps_info = {
203 .num_domains = ARRAY_SIZE(s500_sps_domains),
204 .domains = s500_sps_domains,
207 static const struct owl_sps_domain_info s700_sps_domains[] = {
242 static const struct owl_sps_info s700_sps_info = {
243 .num_domains = ARRAY_SIZE(s700_sps_domains),
244 .domains = s700_sps_domains,
247 static const struct of_device_id owl_sps_of_matches[] = {
248 { .compatible = "actions,s500-sps", .data = &s500_sps_info },
249 { .compatible = "actions,s700-sps", .data = &s700_sps_info },
253 static struct platform_driver owl_sps_platform_driver = {
254 .probe = owl_sps_probe,
257 .of_match_table = owl_sps_of_matches,
258 .suppress_bind_attrs = true,
262 static int __init owl_sps_init(void)
264 return platform_driver_register(&owl_sps_platform_driver);
266 postcore_initcall(owl_sps_init);