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