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 mt6323_keys_resources[] = {
  58         DEFINE_RES_IRQ_NAMED(MT6323_IRQ_STATUS_PWRKEY, "powerkey"),
  59         DEFINE_RES_IRQ_NAMED(MT6323_IRQ_STATUS_FCHRKEY, "homekey"),
  60 };
  61
  62 static const struct resource mt6397_keys_resources[] = {
  63         DEFINE_RES_IRQ_NAMED(MT6397_IRQ_PWRKEY, "powerkey"),
  64         DEFINE_RES_IRQ_NAMED(MT6397_IRQ_HOMEKEY, "homekey"),
  65 };
  66
  67 static const struct resource mt6323_pwrc_resources[] = {
  68         DEFINE_RES_MEM(MT6323_PWRC_BASE, MT6323_PWRC_SIZE),
  69 };
  70
  71 static const struct mfd_cell mt6323_devs[] = {
  72         {
  73                 .name = "mt6323-rtc",
  74                 .num_resources = ARRAY_SIZE(mt6323_rtc_resources),
  75                 .resources = mt6323_rtc_resources,
  76                 .of_compatible = "mediatek,mt6323-rtc",
  77         }, {
  78                 .name = "mt6323-regulator",
  79                 .of_compatible = "mediatek,mt6323-regulator"
  80         }, {
  81                 .name = "mt6323-led",
  82                 .of_compatible = "mediatek,mt6323-led"
  83         }, {
  84                 .name = "mtk-pmic-keys",
  85                 .num_resources = ARRAY_SIZE(mt6323_keys_resources),
  86                 .resources = mt6323_keys_resources,
  87                 .of_compatible = "mediatek,mt6323-keys"
  88         }, {
  89                 .name = "mt6323-pwrc",
  90                 .num_resources = ARRAY_SIZE(mt6323_pwrc_resources),
  91                 .resources = mt6323_pwrc_resources,
  92                 .of_compatible = "mediatek,mt6323-pwrc"
  93         },
  94 };
  95
  96 static const struct mfd_cell mt6358_devs[] = {
  97         {
  98                 .name = "mt6358-regulator",
  99                 .of_compatible = "mediatek,mt6358-regulator"
 100         }, {
 101                 .name = "mt6358-rtc",
 102                 .num_resources = ARRAY_SIZE(mt6358_rtc_resources),
 103                 .resources = mt6358_rtc_resources,
 104                 .of_compatible = "mediatek,mt6358-rtc",
 105         }, {
 106                 .name = "mt6358-sound",
 107                 .of_compatible = "mediatek,mt6358-sound"
 108         }, {
 109                 .name = "mt6358-keys",
 110                 .num_resources = ARRAY_SIZE(mt6358_keys_resources),
 111                 .resources = mt6358_keys_resources,
 112                 .of_compatible = "mediatek,mt6358-keys"
 113         },
 114 };
 115
 116 static const struct mfd_cell mt6359_devs[] = {
 117         { .name = "mt6359-regulator", },
 118         {
 119                 .name = "mt6359-rtc",
 120                 .num_resources = ARRAY_SIZE(mt6358_rtc_resources),
 121                 .resources = mt6358_rtc_resources,
 122                 .of_compatible = "mediatek,mt6358-rtc",
 123         },
 124         { .name = "mt6359-sound", },
 125 };
 126
 127 static const struct mfd_cell mt6397_devs[] = {
 128         {
 129                 .name = "mt6397-rtc",
 130                 .num_resources = ARRAY_SIZE(mt6397_rtc_resources),
 131                 .resources = mt6397_rtc_resources,
 132                 .of_compatible = "mediatek,mt6397-rtc",
 133         }, {
 134                 .name = "mt6397-regulator",
 135                 .of_compatible = "mediatek,mt6397-regulator",
 136         }, {
 137                 .name = "mt6397-codec",
 138                 .of_compatible = "mediatek,mt6397-codec",
 139         }, {
 140                 .name = "mt6397-clk",
 141                 .of_compatible = "mediatek,mt6397-clk",
 142         }, {
 143                 .name = "mt6397-pinctrl",
 144                 .of_compatible = "mediatek,mt6397-pinctrl",
 145         }, {
 146                 .name = "mtk-pmic-keys",
 147                 .num_resources = ARRAY_SIZE(mt6397_keys_resources),
 148                 .resources = mt6397_keys_resources,
 149                 .of_compatible = "mediatek,mt6397-keys"
 150         }
 151 };
 152
 153 struct chip_data {
 154         u32 cid_addr;
 155         u32 cid_shift;
 156         const struct mfd_cell *cells;
 157         int cell_size;
 158         int (*irq_init)(struct mt6397_chip *chip);
 159 };
 160
 161 static const struct chip_data mt6323_core = {
 162         .cid_addr = MT6323_CID,
 163         .cid_shift = 0,
 164         .cells = mt6323_devs,
 165         .cell_size = ARRAY_SIZE(mt6323_devs),
 166         .irq_init = mt6397_irq_init,
 167 };
 168
 169 static const struct chip_data mt6358_core = {
 170         .cid_addr = MT6358_SWCID,
 171         .cid_shift = 8,
 172         .cells = mt6358_devs,
 173         .cell_size = ARRAY_SIZE(mt6358_devs),
 174         .irq_init = mt6358_irq_init,
 175 };
 176
 177 static const struct chip_data mt6359_core = {
 178         .cid_addr = MT6359_SWCID,
 179         .cid_shift = 8,
 180         .cells = mt6359_devs,
 181         .cell_size = ARRAY_SIZE(mt6359_devs),
 182         .irq_init = mt6358_irq_init,
 183 };
 184
 185 static const struct chip_data mt6397_core = {
 186         .cid_addr = MT6397_CID,
 187         .cid_shift = 0,
 188         .cells = mt6397_devs,
 189         .cell_size = ARRAY_SIZE(mt6397_devs),
 190         .irq_init = mt6397_irq_init,
 191 };
 192
 193 static int mt6397_probe(struct platform_device *pdev)
 194 {
 195         int ret;
 196         unsigned int id = 0;
 197         struct mt6397_chip *pmic;
 198         const struct chip_data *pmic_core;
 199
 200         pmic = devm_kzalloc(&pdev->dev, sizeof(*pmic), GFP_KERNEL);
 201         if (!pmic)
 202                 return -ENOMEM;
 203
 204         pmic->dev = &pdev->dev;
 205
 206         /*
 207          * mt6397 MFD is child device of soc pmic wrapper.
 208          * Regmap is set from its parent.
 209          */
 210         pmic->regmap = dev_get_regmap(pdev->dev.parent, NULL);
 211         if (!pmic->regmap)
 212                 return -ENODEV;
 213
 214         pmic_core = of_device_get_match_data(&pdev->dev);
 215         if (!pmic_core)
 216                 return -ENODEV;
 217
 218         ret = regmap_read(pmic->regmap, pmic_core->cid_addr, &id);
 219         if (ret) {
 220                 dev_err(&pdev->dev, "Failed to read chip id: %d\n", ret);
 221                 return ret;
 222         }
 223
 224         pmic->chip_id = (id >> pmic_core->cid_shift) & 0xff;
 225
 226         platform_set_drvdata(pdev, pmic);
 227
 228         pmic->irq = platform_get_irq(pdev, 0);
 229         if (pmic->irq <= 0)
 230                 return pmic->irq;
 231
 232         ret = pmic_core->irq_init(pmic);
 233         if (ret)
 234                 return ret;
 235
 236         ret = devm_mfd_add_devices(&pdev->dev, PLATFORM_DEVID_NONE,
 237                                    pmic_core->cells, pmic_core->cell_size,
 238                                    NULL, 0, pmic->irq_domain);
 239         if (ret) {
 240                 irq_domain_remove(pmic->irq_domain);
 241                 dev_err(&pdev->dev, "failed to add child devices: %d\n", ret);
 242         }
 243
 244         return ret;
 245 }
 246
 247 static const struct of_device_id mt6397_of_match[] = {
 248         {
 249                 .compatible = "mediatek,mt6323",
 250                 .data = &mt6323_core,
 251         }, {
 252                 .compatible = "mediatek,mt6358",
 253                 .data = &mt6358_core,
 254         }, {
 255                 .compatible = "mediatek,mt6359",
 256                 .data = &mt6359_core,
 257         }, {
 258                 .compatible = "mediatek,mt6397",
 259                 .data = &mt6397_core,
 260         }, {
 261                 /* sentinel */
 262         }
 263 };
 264 MODULE_DEVICE_TABLE(of, mt6397_of_match);
 265
 266 static const struct platform_device_id mt6397_id[] = {
 267         { "mt6397", 0 },
 268         { },
 269 };
 270 MODULE_DEVICE_TABLE(platform, mt6397_id);
 271
 272 static struct platform_driver mt6397_driver = {
 273         .probe = mt6397_probe,
 274         .driver = {
 275                 .name = "mt6397",
 276                 .of_match_table = mt6397_of_match,
 277         },
 278         .id_table = mt6397_id,
 279 };
 280
 281 module_platform_driver(mt6397_driver);
 282
 283 MODULE_AUTHOR("Flora Fu, MediaTek");
 284 MODULE_DESCRIPTION("Driver for MediaTek MT6397 PMIC");
 285 MODULE_LICENSE("GPL");