drivers/pmdomain/actions/owl-sps.c

   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 Färber
   9  */
  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
  21 struct owl_sps_domain_info {
  22         const char *name;
  23         int pwr_bit;
  24         int ack_bit;
  25         unsigned int genpd_flags;
  26 };
  27
  28 struct owl_sps_info {
  29         unsigned num_domains;
  30         const struct owl_sps_domain_info *domains;
  31 };
  32
  33 struct 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
  43 struct owl_sps_domain {
  44         struct generic_pm_domain genpd;
  45         const struct owl_sps_domain_info *info;
  46         struct owl_sps *sps;
  47 };
  48
  49 static 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
  59 static 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
  68 static 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
  77 static 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
  99 static 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
 143 static 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
 193 static const struct owl_sps_info s500_sps_info = {
 194         .num_domains = ARRAY_SIZE(s500_sps_domains),
 195         .domains = s500_sps_domains,
 196 };
 197
 198 static 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
 233 static const struct owl_sps_info s700_sps_info = {
 234         .num_domains = ARRAY_SIZE(s700_sps_domains),
 235         .domains = s700_sps_domains,
 236 };
 237
 238 static 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
 289 static const struct owl_sps_info s900_sps_info = {
 290         .num_domains = ARRAY_SIZE(s900_sps_domains),
 291         .domains = s900_sps_domains,
 292 };
 293
 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 },
 298         { }
 299 };
 300
 301 static 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
 310 static int __init owl_sps_init(void)
 311 {
 312         return platform_driver_register(&owl_sps_platform_driver);
 313 }
 314 postcore_initcall(owl_sps_init);