1 // SPDX-License-Identifier: GPL-2.0+
3 * Actions Semi Owl Smart Power System (SPS)
5 * Copyright 2012 Actions Semi Inc.
6 * Author: Actions Semi, Inc.
8 * Copyright (c) 2017 Andreas Färber
11 #include <linux/mod_devicetable.h>
12 #include <linux/of_address.h>
13 #include <linux/platform_device.h>
14 #include <linux/property.h>
15 #include <linux/pm_domain.h>
16 #include <linux/soc/actions/owl-sps.h>
17 #include <dt-bindings/power/owl-s500-powergate.h>
18 #include <dt-bindings/power/owl-s700-powergate.h>
19 #include <dt-bindings/power/owl-s900-powergate.h>
21 struct owl_sps_domain_info {
25 unsigned int genpd_flags;
30 const struct owl_sps_domain_info *domains;
35 const struct owl_sps_info *info;
37 struct genpd_onecell_data genpd_data;
38 struct generic_pm_domain *domains[];
41 #define to_owl_pd(gpd) container_of(gpd, struct owl_sps_domain, genpd)
43 struct owl_sps_domain {
44 struct generic_pm_domain genpd;
45 const struct owl_sps_domain_info *info;
49 static int owl_sps_set_power(struct owl_sps_domain *pd, bool enable)
51 u32 pwr_mask, ack_mask;
53 ack_mask = BIT(pd->info->ack_bit);
54 pwr_mask = BIT(pd->info->pwr_bit);
56 return owl_sps_set_pg(pd->sps->base, pwr_mask, ack_mask, enable);
59 static int owl_sps_power_on(struct generic_pm_domain *domain)
61 struct owl_sps_domain *pd = to_owl_pd(domain);
63 dev_dbg(pd->sps->dev, "%s power on", pd->info->name);
65 return owl_sps_set_power(pd, true);
68 static int owl_sps_power_off(struct generic_pm_domain *domain)
70 struct owl_sps_domain *pd = to_owl_pd(domain);
72 dev_dbg(pd->sps->dev, "%s power off", pd->info->name);
74 return owl_sps_set_power(pd, false);
77 static int owl_sps_init_domain(struct owl_sps *sps, int index)
79 struct owl_sps_domain *pd;
81 pd = devm_kzalloc(sps->dev, sizeof(*pd), GFP_KERNEL);
85 pd->info = &sps->info->domains[index];
88 pd->genpd.name = pd->info->name;
89 pd->genpd.power_on = owl_sps_power_on;
90 pd->genpd.power_off = owl_sps_power_off;
91 pd->genpd.flags = pd->info->genpd_flags;
92 pm_genpd_init(&pd->genpd, NULL, false);
94 sps->genpd_data.domains[index] = &pd->genpd;
99 static int owl_sps_probe(struct platform_device *pdev)
101 const struct owl_sps_info *sps_info;
105 sps_info = device_get_match_data(&pdev->dev);
107 dev_err(&pdev->dev, "unknown compatible or missing data\n");
111 sps = devm_kzalloc(&pdev->dev,
112 struct_size(sps, domains, sps_info->num_domains),
117 sps->base = of_io_request_and_map(pdev->dev.of_node, 0, "owl-sps");
118 if (IS_ERR(sps->base)) {
119 dev_err(&pdev->dev, "failed to map sps registers\n");
120 return PTR_ERR(sps->base);
123 sps->dev = &pdev->dev;
124 sps->info = sps_info;
125 sps->genpd_data.domains = sps->domains;
126 sps->genpd_data.num_domains = sps_info->num_domains;
128 for (i = 0; i < sps_info->num_domains; i++) {
129 ret = owl_sps_init_domain(sps, i);
134 ret = of_genpd_add_provider_onecell(pdev->dev.of_node, &sps->genpd_data);
136 dev_err(&pdev->dev, "failed to add provider (%d)", ret);
143 static const struct owl_sps_domain_info s500_sps_domains[] = {
163 .genpd_flags = GENPD_FLAG_ALWAYS_ON,
169 .genpd_flags = GENPD_FLAG_ALWAYS_ON,
193 static const struct owl_sps_info s500_sps_info = {
194 .num_domains = ARRAY_SIZE(s500_sps_domains),
195 .domains = s500_sps_domains,
198 static const struct owl_sps_domain_info s700_sps_domains[] = {
233 static const struct owl_sps_info s700_sps_info = {
234 .num_domains = ARRAY_SIZE(s700_sps_domains),
235 .domains = s700_sps_domains,
238 static const struct owl_sps_domain_info s900_sps_domains[] = {
279 [S900_PD_USB2_H0] = {
283 [S900_PD_USB2_H1] = {
289 static const struct owl_sps_info s900_sps_info = {
290 .num_domains = ARRAY_SIZE(s900_sps_domains),
291 .domains = s900_sps_domains,
294 static const struct of_device_id owl_sps_of_matches[] = {
295 { .compatible = "actions,s500-sps", .data = &s500_sps_info },
296 { .compatible = "actions,s700-sps", .data = &s700_sps_info },
297 { .compatible = "actions,s900-sps", .data = &s900_sps_info },
301 static struct platform_driver owl_sps_platform_driver = {
302 .probe = owl_sps_probe,
305 .of_match_table = owl_sps_of_matches,
306 .suppress_bind_attrs = true,
310 static int __init owl_sps_init(void)
312 return platform_driver_register(&owl_sps_platform_driver);
314 postcore_initcall(owl_sps_init);