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 mt6323_keys_resources[] = {
  51         DEFINE_RES_IRQ(MT6323_IRQ_STATUS_PWRKEY),
  52         DEFINE_RES_IRQ(MT6323_IRQ_STATUS_FCHRKEY),
  53 };
  54
  55 static const struct resource mt6397_keys_resources[] = {
  56         DEFINE_RES_IRQ(MT6397_IRQ_PWRKEY),
  57         DEFINE_RES_IRQ(MT6397_IRQ_HOMEKEY),
  58 };
  59
  60 static const struct resource mt6323_pwrc_resources[] = {
  61         DEFINE_RES_MEM(MT6323_PWRC_BASE, MT6323_PWRC_SIZE),
  62 };
  63
  64 static const struct mfd_cell mt6323_devs[] = {
  65         {
  66                 .name = "mt6323-rtc",
  67                 .num_resources = ARRAY_SIZE(mt6323_rtc_resources),
  68                 .resources = mt6323_rtc_resources,
  69                 .of_compatible = "mediatek,mt6323-rtc",
  70         }, {
  71                 .name = "mt6323-regulator",
  72                 .of_compatible = "mediatek,mt6323-regulator"
  73         }, {
  74                 .name = "mt6323-led",
  75                 .of_compatible = "mediatek,mt6323-led"
  76         }, {
  77                 .name = "mtk-pmic-keys",
  78                 .num_resources = ARRAY_SIZE(mt6323_keys_resources),
  79                 .resources = mt6323_keys_resources,
  80                 .of_compatible = "mediatek,mt6323-keys"
  81         }, {
  82                 .name = "mt6323-pwrc",
  83                 .num_resources = ARRAY_SIZE(mt6323_pwrc_resources),
  84                 .resources = mt6323_pwrc_resources,
  85                 .of_compatible = "mediatek,mt6323-pwrc"
  86         },
  87 };
  88
  89 static const struct mfd_cell mt6358_devs[] = {
  90         {
  91                 .name = "mt6358-regulator",
  92                 .of_compatible = "mediatek,mt6358-regulator"
  93         }, {
  94                 .name = "mt6358-rtc",
  95                 .num_resources = ARRAY_SIZE(mt6358_rtc_resources),
  96                 .resources = mt6358_rtc_resources,
  97                 .of_compatible = "mediatek,mt6358-rtc",
  98         }, {
  99                 .name = "mt6358-sound",
 100                 .of_compatible = "mediatek,mt6358-sound"
 101         },
 102 };
 103
 104 static const struct mfd_cell mt6359_devs[] = {
 105         { .name = "mt6359-regulator", },
 106         {
 107                 .name = "mt6359-rtc",
 108                 .num_resources = ARRAY_SIZE(mt6358_rtc_resources),
 109                 .resources = mt6358_rtc_resources,
 110                 .of_compatible = "mediatek,mt6358-rtc",
 111         },
 112         { .name = "mt6359-sound", },
 113 };
 114
 115 static const struct mfd_cell mt6397_devs[] = {
 116         {
 117                 .name = "mt6397-rtc",
 118                 .num_resources = ARRAY_SIZE(mt6397_rtc_resources),
 119                 .resources = mt6397_rtc_resources,
 120                 .of_compatible = "mediatek,mt6397-rtc",
 121         }, {
 122                 .name = "mt6397-regulator",
 123                 .of_compatible = "mediatek,mt6397-regulator",
 124         }, {
 125                 .name = "mt6397-codec",
 126                 .of_compatible = "mediatek,mt6397-codec",
 127         }, {
 128                 .name = "mt6397-clk",
 129                 .of_compatible = "mediatek,mt6397-clk",
 130         }, {
 131                 .name = "mt6397-pinctrl",
 132                 .of_compatible = "mediatek,mt6397-pinctrl",
 133         }, {
 134                 .name = "mtk-pmic-keys",
 135                 .num_resources = ARRAY_SIZE(mt6397_keys_resources),
 136                 .resources = mt6397_keys_resources,
 137                 .of_compatible = "mediatek,mt6397-keys"
 138         }
 139 };
 140
 141 struct chip_data {
 142         u32 cid_addr;
 143         u32 cid_shift;
 144         const struct mfd_cell *cells;
 145         int cell_size;
 146         int (*irq_init)(struct mt6397_chip *chip);
 147 };
 148
 149 static const struct chip_data mt6323_core = {
 150         .cid_addr = MT6323_CID,
 151         .cid_shift = 0,
 152         .cells = mt6323_devs,
 153         .cell_size = ARRAY_SIZE(mt6323_devs),
 154         .irq_init = mt6397_irq_init,
 155 };
 156
 157 static const struct chip_data mt6358_core = {
 158         .cid_addr = MT6358_SWCID,
 159         .cid_shift = 8,
 160         .cells = mt6358_devs,
 161         .cell_size = ARRAY_SIZE(mt6358_devs),
 162         .irq_init = mt6358_irq_init,
 163 };
 164
 165 static const struct chip_data mt6359_core = {
 166         .cid_addr = MT6359_SWCID,
 167         .cid_shift = 8,
 168         .cells = mt6359_devs,
 169         .cell_size = ARRAY_SIZE(mt6359_devs),
 170         .irq_init = mt6358_irq_init,
 171 };
 172
 173 static const struct chip_data mt6397_core = {
 174         .cid_addr = MT6397_CID,
 175         .cid_shift = 0,
 176         .cells = mt6397_devs,
 177         .cell_size = ARRAY_SIZE(mt6397_devs),
 178         .irq_init = mt6397_irq_init,
 179 };
 180
 181 static int mt6397_probe(struct platform_device *pdev)
 182 {
 183         int ret;
 184         unsigned int id = 0;
 185         struct mt6397_chip *pmic;
 186         const struct chip_data *pmic_core;
 187
 188         pmic = devm_kzalloc(&pdev->dev, sizeof(*pmic), GFP_KERNEL);
 189         if (!pmic)
 190                 return -ENOMEM;
 191
 192         pmic->dev = &pdev->dev;
 193
 194         /*
 195          * mt6397 MFD is child device of soc pmic wrapper.
 196          * Regmap is set from its parent.
 197          */
 198         pmic->regmap = dev_get_regmap(pdev->dev.parent, NULL);
 199         if (!pmic->regmap)
 200                 return -ENODEV;
 201
 202         pmic_core = of_device_get_match_data(&pdev->dev);
 203         if (!pmic_core)
 204                 return -ENODEV;
 205
 206         ret = regmap_read(pmic->regmap, pmic_core->cid_addr, &id);
 207         if (ret) {
 208                 dev_err(&pdev->dev, "Failed to read chip id: %d\n", ret);
 209                 return ret;
 210         }
 211
 212         pmic->chip_id = (id >> pmic_core->cid_shift) & 0xff;
 213
 214         platform_set_drvdata(pdev, pmic);
 215
 216         pmic->irq = platform_get_irq(pdev, 0);
 217         if (pmic->irq <= 0)
 218                 return pmic->irq;
 219
 220         ret = pmic_core->irq_init(pmic);
 221         if (ret)
 222                 return ret;
 223
 224         ret = devm_mfd_add_devices(&pdev->dev, PLATFORM_DEVID_NONE,
 225                                    pmic_core->cells, pmic_core->cell_size,
 226                                    NULL, 0, pmic->irq_domain);
 227         if (ret) {
 228                 irq_domain_remove(pmic->irq_domain);
 229                 dev_err(&pdev->dev, "failed to add child devices: %d\n", ret);
 230         }
 231
 232         return ret;
 233 }
 234
 235 static const struct of_device_id mt6397_of_match[] = {
 236         {
 237                 .compatible = "mediatek,mt6323",
 238                 .data = &mt6323_core,
 239         }, {
 240                 .compatible = "mediatek,mt6358",
 241                 .data = &mt6358_core,
 242         }, {
 243                 .compatible = "mediatek,mt6359",
 244                 .data = &mt6359_core,
 245         }, {
 246                 .compatible = "mediatek,mt6397",
 247                 .data = &mt6397_core,
 248         }, {
 249                 /* sentinel */
 250         }
 251 };
 252 MODULE_DEVICE_TABLE(of, mt6397_of_match);
 253
 254 static const struct platform_device_id mt6397_id[] = {
 255         { "mt6397", 0 },
 256         { },
 257 };
 258 MODULE_DEVICE_TABLE(platform, mt6397_id);
 259
 260 static struct platform_driver mt6397_driver = {
 261         .probe = mt6397_probe,
 262         .driver = {
 263                 .name = "mt6397",
 264                 .of_match_table = mt6397_of_match,
 265         },
 266         .id_table = mt6397_id,
 267 };
 268
 269 module_platform_driver(mt6397_driver);
 270
 271 MODULE_AUTHOR("Flora Fu, MediaTek");
 272 MODULE_DESCRIPTION("Driver for MediaTek MT6397 PMIC");
 273 MODULE_LICENSE("GPL");