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1// SPDX-License-Identifier: GPL-2.0+2/*3 * Actions Semi Owl Smart Power System (SPS)4 *5 * Copyright 2012 Actions Semi Inc.6 * Author: Actions Semi, Inc.7 *8 * Copyright (c) 2017 Andreas Färber9 */10 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>20 21struct owl_sps_domain_info {22 const char *name;23 int pwr_bit;24 int ack_bit;25 unsigned int genpd_flags;26};27 28struct owl_sps_info {29 unsigned num_domains;30 const struct owl_sps_domain_info *domains;31};32 33struct owl_sps {34 struct device *dev;35 const struct owl_sps_info *info;36 void __iomem *base;37 struct genpd_onecell_data genpd_data;38 struct generic_pm_domain *domains[];39};40 41#define to_owl_pd(gpd) container_of(gpd, struct owl_sps_domain, genpd)42 43struct owl_sps_domain {44 struct generic_pm_domain genpd;45 const struct owl_sps_domain_info *info;46 struct owl_sps *sps;47};48 49static int owl_sps_set_power(struct owl_sps_domain *pd, bool enable)50{51 u32 pwr_mask, ack_mask;52 53 ack_mask = BIT(pd->info->ack_bit);54 pwr_mask = BIT(pd->info->pwr_bit);55 56 return owl_sps_set_pg(pd->sps->base, pwr_mask, ack_mask, enable);57}58 59static int owl_sps_power_on(struct generic_pm_domain *domain)60{61 struct owl_sps_domain *pd = to_owl_pd(domain);62 63 dev_dbg(pd->sps->dev, "%s power on", pd->info->name);64 65 return owl_sps_set_power(pd, true);66}67 68static int owl_sps_power_off(struct generic_pm_domain *domain)69{70 struct owl_sps_domain *pd = to_owl_pd(domain);71 72 dev_dbg(pd->sps->dev, "%s power off", pd->info->name);73 74 return owl_sps_set_power(pd, false);75}76 77static int owl_sps_init_domain(struct owl_sps *sps, int index)78{79 struct owl_sps_domain *pd;80 81 pd = devm_kzalloc(sps->dev, sizeof(*pd), GFP_KERNEL);82 if (!pd)83 return -ENOMEM;84 85 pd->info = &sps->info->domains[index];86 pd->sps = sps;87 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);93 94 sps->genpd_data.domains[index] = &pd->genpd;95 96 return 0;97}98 99static int owl_sps_probe(struct platform_device *pdev)100{101 const struct owl_sps_info *sps_info;102 struct owl_sps *sps;103 int i, ret;104 105 sps_info = device_get_match_data(&pdev->dev);106 if (!sps_info) {107 dev_err(&pdev->dev, "unknown compatible or missing data\n");108 return -EINVAL;109 }110 111 sps = devm_kzalloc(&pdev->dev,112 struct_size(sps, domains, sps_info->num_domains),113 GFP_KERNEL);114 if (!sps)115 return -ENOMEM;116 117 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);121 }122 123 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;127 128 for (i = 0; i < sps_info->num_domains; i++) {129 ret = owl_sps_init_domain(sps, i);130 if (ret)131 return ret;132 }133 134 ret = of_genpd_add_provider_onecell(pdev->dev.of_node, &sps->genpd_data);135 if (ret) {136 dev_err(&pdev->dev, "failed to add provider (%d)", ret);137 return ret;138 }139 140 return 0;141}142 143static const struct owl_sps_domain_info s500_sps_domains[] = {144 [S500_PD_VDE] = {145 .name = "VDE",146 .pwr_bit = 0,147 .ack_bit = 16,148 },149 [S500_PD_VCE_SI] = {150 .name = "VCE_SI",151 .pwr_bit = 1,152 .ack_bit = 17,153 },154 [S500_PD_USB2_1] = {155 .name = "USB2_1",156 .pwr_bit = 2,157 .ack_bit = 18,158 },159 [S500_PD_CPU2] = {160 .name = "CPU2",161 .pwr_bit = 5,162 .ack_bit = 21,163 .genpd_flags = GENPD_FLAG_ALWAYS_ON,164 },165 [S500_PD_CPU3] = {166 .name = "CPU3",167 .pwr_bit = 6,168 .ack_bit = 22,169 .genpd_flags = GENPD_FLAG_ALWAYS_ON,170 },171 [S500_PD_DMA] = {172 .name = "DMA",173 .pwr_bit = 8,174 .ack_bit = 12,175 },176 [S500_PD_DS] = {177 .name = "DS",178 .pwr_bit = 9,179 .ack_bit = 13,180 },181 [S500_PD_USB3] = {182 .name = "USB3",183 .pwr_bit = 10,184 .ack_bit = 14,185 },186 [S500_PD_USB2_0] = {187 .name = "USB2_0",188 .pwr_bit = 11,189 .ack_bit = 15,190 },191};192 193static const struct owl_sps_info s500_sps_info = {194 .num_domains = ARRAY_SIZE(s500_sps_domains),195 .domains = s500_sps_domains,196};197 198static const struct owl_sps_domain_info s700_sps_domains[] = {199 [S700_PD_VDE] = {200 .name = "VDE",201 .pwr_bit = 0,202 },203 [S700_PD_VCE_SI] = {204 .name = "VCE_SI",205 .pwr_bit = 1,206 },207 [S700_PD_USB2_1] = {208 .name = "USB2_1",209 .pwr_bit = 2,210 },211 [S700_PD_HDE] = {212 .name = "HDE",213 .pwr_bit = 7,214 },215 [S700_PD_DMA] = {216 .name = "DMA",217 .pwr_bit = 8,218 },219 [S700_PD_DS] = {220 .name = "DS",221 .pwr_bit = 9,222 },223 [S700_PD_USB3] = {224 .name = "USB3",225 .pwr_bit = 10,226 },227 [S700_PD_USB2_0] = {228 .name = "USB2_0",229 .pwr_bit = 11,230 },231};232 233static const struct owl_sps_info s700_sps_info = {234 .num_domains = ARRAY_SIZE(s700_sps_domains),235 .domains = s700_sps_domains,236};237 238static const struct owl_sps_domain_info s900_sps_domains[] = {239 [S900_PD_GPU_B] = {240 .name = "GPU_B",241 .pwr_bit = 3,242 },243 [S900_PD_VCE] = {244 .name = "VCE",245 .pwr_bit = 4,246 },247 [S900_PD_SENSOR] = {248 .name = "SENSOR",249 .pwr_bit = 5,250 },251 [S900_PD_VDE] = {252 .name = "VDE",253 .pwr_bit = 6,254 },255 [S900_PD_HDE] = {256 .name = "HDE",257 .pwr_bit = 7,258 },259 [S900_PD_USB3] = {260 .name = "USB3",261 .pwr_bit = 8,262 },263 [S900_PD_DDR0] = {264 .name = "DDR0",265 .pwr_bit = 9,266 },267 [S900_PD_DDR1] = {268 .name = "DDR1",269 .pwr_bit = 10,270 },271 [S900_PD_DE] = {272 .name = "DE",273 .pwr_bit = 13,274 },275 [S900_PD_NAND] = {276 .name = "NAND",277 .pwr_bit = 14,278 },279 [S900_PD_USB2_H0] = {280 .name = "USB2_H0",281 .pwr_bit = 15,282 },283 [S900_PD_USB2_H1] = {284 .name = "USB2_H1",285 .pwr_bit = 16,286 },287};288 289static const struct owl_sps_info s900_sps_info = {290 .num_domains = ARRAY_SIZE(s900_sps_domains),291 .domains = s900_sps_domains,292};293 294static 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 },298 { }299};300 301static struct platform_driver owl_sps_platform_driver = {302 .probe = owl_sps_probe,303 .driver = {304 .name = "owl-sps",305 .of_match_table = owl_sps_of_matches,306 .suppress_bind_attrs = true,307 },308};309 310static int __init owl_sps_init(void)311{312 return platform_driver_register(&owl_sps_platform_driver);313}314postcore_initcall(owl_sps_init);315