drivers/mfd/mt6397-core.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * Copyright (c) 2014 MediaTek Inc.
   4  * Author: Flora Fu, MediaTek
   5  */
   6
   7 #include <linux/interrupt.h>
   8 #include <linux/ioport.h>
   9 #include <linux/module.h>
  10 #include <linux/of_device.h>
  11 #include <linux/of_irq.h>
  12 #include <linux/regmap.h>
  13 #include <linux/mfd/core.h>
  14 #include <linux/mfd/mt6323/core.h>
  15 #include <linux/mfd/mt6358/core.h>
  16 #include <linux/mfd/mt6359/core.h>
  17 #include <linux/mfd/mt6397/core.h>
  18 #include <linux/mfd/mt6323/registers.h>
  19 #include <linux/mfd/mt6358/registers.h>
  20 #include <linux/mfd/mt6359/registers.h>
  21 #include <linux/mfd/mt6397/registers.h>
  22
  23 #define MT6323_RTC_BASE         0x8000
  24 #define MT6323_RTC_SIZE         0x40
  25
  26 #define MT6358_RTC_BASE         0x0588
  27 #define MT6358_RTC_SIZE         0x3c
  28
  29 #define MT6397_RTC_BASE         0xe000
  30 #define MT6397_RTC_SIZE         0x3e
  31
  32 #define MT6323_PWRC_BASE        0x8000
  33 #define MT6323_PWRC_SIZE        0x40
  34
  35 static const struct resource mt6323_rtc_resources[] = {
  36         DEFINE_RES_MEM(MT6323_RTC_BASE, MT6323_RTC_SIZE),
  37         DEFINE_RES_IRQ(MT6323_IRQ_STATUS_RTC),
  38 };
  39
  40 static const struct resource mt6358_rtc_resources[] = {
  41         DEFINE_RES_MEM(MT6358_RTC_BASE, MT6358_RTC_SIZE),
  42         DEFINE_RES_IRQ(MT6358_IRQ_RTC),
  43 };
  44
  45 static const struct resource mt6397_rtc_resources[] = {
  46         DEFINE_RES_MEM(MT6397_RTC_BASE, MT6397_RTC_SIZE),
  47         DEFINE_RES_IRQ(MT6397_IRQ_RTC),
  48 };
  49
  50 static const struct resource mt6358_keys_resources[] = {
  51         DEFINE_RES_IRQ_NAMED(MT6358_IRQ_PWRKEY, "powerkey"),
  52         DEFINE_RES_IRQ_NAMED(MT6358_IRQ_HOMEKEY, "homekey"),
  53         DEFINE_RES_IRQ_NAMED(MT6358_IRQ_PWRKEY_R, "powerkey_r"),
  54         DEFINE_RES_IRQ_NAMED(MT6358_IRQ_HOMEKEY_R, "homekey_r"),
  55 };
  56
  57 static const struct resource mt6359_keys_resources[] = {
  58         DEFINE_RES_IRQ_NAMED(MT6359_IRQ_PWRKEY, "powerkey"),
  59         DEFINE_RES_IRQ_NAMED(MT6359_IRQ_HOMEKEY, "homekey"),
  60         DEFINE_RES_IRQ_NAMED(MT6359_IRQ_PWRKEY_R, "powerkey_r"),
  61         DEFINE_RES_IRQ_NAMED(MT6359_IRQ_HOMEKEY_R, "homekey_r"),
  62 };
  63
  64 static const struct resource mt6323_keys_resources[] = {
  65         DEFINE_RES_IRQ_NAMED(MT6323_IRQ_STATUS_PWRKEY, "powerkey"),
  66         DEFINE_RES_IRQ_NAMED(MT6323_IRQ_STATUS_FCHRKEY, "homekey"),
  67 };
  68
  69 static const struct resource mt6397_keys_resources[] = {
  70         DEFINE_RES_IRQ_NAMED(MT6397_IRQ_PWRKEY, "powerkey"),
  71         DEFINE_RES_IRQ_NAMED(MT6397_IRQ_HOMEKEY, "homekey"),
  72 };
  73
  74 static const struct resource mt6323_pwrc_resources[] = {
  75         DEFINE_RES_MEM(MT6323_PWRC_BASE, MT6323_PWRC_SIZE),
  76 };
  77
  78 static const struct mfd_cell mt6323_devs[] = {
  79         {
  80                 .name = "mt6323-rtc",
  81                 .num_resources = ARRAY_SIZE(mt6323_rtc_resources),
  82                 .resources = mt6323_rtc_resources,
  83                 .of_compatible = "mediatek,mt6323-rtc",
  84         }, {
  85                 .name = "mt6323-regulator",
  86                 .of_compatible = "mediatek,mt6323-regulator"
  87         }, {
  88                 .name = "mt6323-led",
  89                 .of_compatible = "mediatek,mt6323-led"
  90         }, {
  91                 .name = "mtk-pmic-keys",
  92                 .num_resources = ARRAY_SIZE(mt6323_keys_resources),
  93                 .resources = mt6323_keys_resources,
  94                 .of_compatible = "mediatek,mt6323-keys"
  95         }, {
  96                 .name = "mt6323-pwrc",
  97                 .num_resources = ARRAY_SIZE(mt6323_pwrc_resources),
  98                 .resources = mt6323_pwrc_resources,
  99                 .of_compatible = "mediatek,mt6323-pwrc"
 100         },
 101 };
 102
 103 static const struct mfd_cell mt6358_devs[] = {
 104         {
 105                 .name = "mt6358-regulator",
 106                 .of_compatible = "mediatek,mt6358-regulator"
 107         }, {
 108                 .name = "mt6358-rtc",
 109                 .num_resources = ARRAY_SIZE(mt6358_rtc_resources),
 110                 .resources = mt6358_rtc_resources,
 111                 .of_compatible = "mediatek,mt6358-rtc",
 112         }, {
 113                 .name = "mt6358-sound",
 114                 .of_compatible = "mediatek,mt6358-sound"
 115         }, {
 116                 .name = "mt6358-keys",
 117                 .num_resources = ARRAY_SIZE(mt6358_keys_resources),
 118                 .resources = mt6358_keys_resources,
 119                 .of_compatible = "mediatek,mt6358-keys"
 120         },
 121 };
 122
 123 static const struct mfd_cell mt6359_devs[] = {
 124         { .name = "mt6359-regulator", },
 125         {
 126                 .name = "mt6359-rtc",
 127                 .num_resources = ARRAY_SIZE(mt6358_rtc_resources),
 128                 .resources = mt6358_rtc_resources,
 129                 .of_compatible = "mediatek,mt6358-rtc",
 130         },
 131         { .name = "mt6359-sound", },
 132         {
 133                 .name = "mtk-pmic-keys",
 134                 .num_resources = ARRAY_SIZE(mt6359_keys_resources),
 135                 .resources = mt6359_keys_resources,
 136                 .of_compatible = "mediatek,mt6359-keys"
 137         },
 138 };
 139
 140 static const struct mfd_cell mt6397_devs[] = {
 141         {
 142                 .name = "mt6397-rtc",
 143                 .num_resources = ARRAY_SIZE(mt6397_rtc_resources),
 144                 .resources = mt6397_rtc_resources,
 145                 .of_compatible = "mediatek,mt6397-rtc",
 146         }, {
 147                 .name = "mt6397-regulator",
 148                 .of_compatible = "mediatek,mt6397-regulator",
 149         }, {
 150                 .name = "mt6397-codec",
 151                 .of_compatible = "mediatek,mt6397-codec",
 152         }, {
 153                 .name = "mt6397-clk",
 154                 .of_compatible = "mediatek,mt6397-clk",
 155         }, {
 156                 .name = "mt6397-pinctrl",
 157                 .of_compatible = "mediatek,mt6397-pinctrl",
 158         }, {
 159                 .name = "mtk-pmic-keys",
 160                 .num_resources = ARRAY_SIZE(mt6397_keys_resources),
 161                 .resources = mt6397_keys_resources,
 162                 .of_compatible = "mediatek,mt6397-keys"
 163         }
 164 };
 165
 166 struct chip_data {
 167         u32 cid_addr;
 168         u32 cid_shift;
 169         const struct mfd_cell *cells;
 170         int cell_size;
 171         int (*irq_init)(struct mt6397_chip *chip);
 172 };
 173
 174 static const struct chip_data mt6323_core = {
 175         .cid_addr = MT6323_CID,
 176         .cid_shift = 0,
 177         .cells = mt6323_devs,
 178         .cell_size = ARRAY_SIZE(mt6323_devs),
 179         .irq_init = mt6397_irq_init,
 180 };
 181
 182 static const struct chip_data mt6358_core = {
 183         .cid_addr = MT6358_SWCID,
 184         .cid_shift = 8,
 185         .cells = mt6358_devs,
 186         .cell_size = ARRAY_SIZE(mt6358_devs),
 187         .irq_init = mt6358_irq_init,
 188 };
 189
 190 static const struct chip_data mt6359_core = {
 191         .cid_addr = MT6359_SWCID,
 192         .cid_shift = 8,
 193         .cells = mt6359_devs,
 194         .cell_size = ARRAY_SIZE(mt6359_devs),
 195         .irq_init = mt6358_irq_init,
 196 };
 197
 198 static const struct chip_data mt6397_core = {
 199         .cid_addr = MT6397_CID,
 200         .cid_shift = 0,
 201         .cells = mt6397_devs,
 202         .cell_size = ARRAY_SIZE(mt6397_devs),
 203         .irq_init = mt6397_irq_init,
 204 };
 205
 206 static int mt6397_probe(struct platform_device *pdev)
 207 {
 208         int ret;
 209         unsigned int id = 0;
 210         struct mt6397_chip *pmic;
 211         const struct chip_data *pmic_core;
 212
 213         pmic = devm_kzalloc(&pdev->dev, sizeof(*pmic), GFP_KERNEL);
 214         if (!pmic)
 215                 return -ENOMEM;
 216
 217         pmic->dev = &pdev->dev;
 218
 219         /*
 220          * mt6397 MFD is child device of soc pmic wrapper.
 221          * Regmap is set from its parent.
 222          */
 223         pmic->regmap = dev_get_regmap(pdev->dev.parent, NULL);
 224         if (!pmic->regmap)
 225                 return -ENODEV;
 226
 227         pmic_core = of_device_get_match_data(&pdev->dev);
 228         if (!pmic_core)
 229                 return -ENODEV;
 230
 231         ret = regmap_read(pmic->regmap, pmic_core->cid_addr, &id);
 232         if (ret) {
 233                 dev_err(&pdev->dev, "Failed to read chip id: %d\n", ret);
 234                 return ret;
 235         }
 236
 237         pmic->chip_id = (id >> pmic_core->cid_shift) & 0xff;
 238
 239         platform_set_drvdata(pdev, pmic);
 240
 241         pmic->irq = platform_get_irq(pdev, 0);
 242         if (pmic->irq <= 0)
 243                 return pmic->irq;
 244
 245         ret = pmic_core->irq_init(pmic);
 246         if (ret)
 247                 return ret;
 248
 249         ret = devm_mfd_add_devices(&pdev->dev, PLATFORM_DEVID_NONE,
 250                                    pmic_core->cells, pmic_core->cell_size,
 251                                    NULL, 0, pmic->irq_domain);
 252         if (ret) {
 253                 irq_domain_remove(pmic->irq_domain);
 254                 dev_err(&pdev->dev, "failed to add child devices: %d\n", ret);
 255         }
 256
 257         return ret;
 258 }
 259
 260 static const struct of_device_id mt6397_of_match[] = {
 261         {
 262                 .compatible = "mediatek,mt6323",
 263                 .data = &mt6323_core,
 264         }, {
 265                 .compatible = "mediatek,mt6358",
 266                 .data = &mt6358_core,
 267         }, {
 268                 .compatible = "mediatek,mt6359",
 269                 .data = &mt6359_core,
 270         }, {
 271                 .compatible = "mediatek,mt6397",
 272                 .data = &mt6397_core,
 273         }, {
 274                 /* sentinel */
 275         }
 276 };
 277 MODULE_DEVICE_TABLE(of, mt6397_of_match);
 278
 279 static const struct platform_device_id mt6397_id[] = {
 280         { "mt6397", 0 },
 281         { },
 282 };
 283 MODULE_DEVICE_TABLE(platform, mt6397_id);
 284
 285 static struct platform_driver mt6397_driver = {
 286         .probe = mt6397_probe,
 287         .driver = {
 288                 .name = "mt6397",
 289                 .of_match_table = mt6397_of_match,
 290         },
 291         .id_table = mt6397_id,
 292 };
 293
 294 module_platform_driver(mt6397_driver);
 295
 296 MODULE_AUTHOR("Flora Fu, MediaTek");
 297 MODULE_DESCRIPTION("Driver for MediaTek MT6397 PMIC");
 298 MODULE_LICENSE("GPL");