drivers/mfd/mt6370.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * Copyright (C) 2022 Richtek Technology Corp.
   4  *
   5  * Author: ChiYuan Huang <cy_huang@richtek.com>
   6  */
   7
   8 #include <linux/bits.h>
   9 #include <linux/bitfield.h>
  10 #include <linux/i2c.h>
  11 #include <linux/interrupt.h>
  12 #include <linux/kernel.h>
  13 #include <linux/mfd/core.h>
  14 #include <linux/module.h>
  15 #include <linux/regmap.h>
  16
  17 #include "mt6370.h"
  18
  19 #define MT6370_REG_DEV_INFO     0x100
  20 #define MT6370_REG_CHG_IRQ1     0x1C0
  21 #define MT6370_REG_CHG_MASK1    0x1E0
  22 #define MT6370_REG_MAXADDR      0x1FF
  23
  24 #define MT6370_VENID_MASK       GENMASK(7, 4)
  25
  26 #define MT6370_NUM_IRQREGS      16
  27 #define MT6370_USBC_I2CADDR     0x4E
  28 #define MT6370_MAX_ADDRLEN      2
  29
  30 #define MT6370_VENID_RT5081     0x8
  31 #define MT6370_VENID_RT5081A    0xA
  32 #define MT6370_VENID_MT6370     0xE
  33 #define MT6370_VENID_MT6371     0xF
  34 #define MT6370_VENID_MT6372P    0x9
  35 #define MT6370_VENID_MT6372CP   0xB
  36
  37 static const struct regmap_irq mt6370_irqs[] = {
  38         REGMAP_IRQ_REG_LINE(MT6370_IRQ_DIRCHGON, 8),
  39         REGMAP_IRQ_REG_LINE(MT6370_IRQ_CHG_TREG, 8),
  40         REGMAP_IRQ_REG_LINE(MT6370_IRQ_CHG_AICR, 8),
  41         REGMAP_IRQ_REG_LINE(MT6370_IRQ_CHG_MIVR, 8),
  42         REGMAP_IRQ_REG_LINE(MT6370_IRQ_PWR_RDY, 8),
  43         REGMAP_IRQ_REG_LINE(MT6370_IRQ_FL_CHG_VINOVP, 8),
  44         REGMAP_IRQ_REG_LINE(MT6370_IRQ_CHG_VSYSUV, 8),
  45         REGMAP_IRQ_REG_LINE(MT6370_IRQ_CHG_VSYSOV, 8),
  46         REGMAP_IRQ_REG_LINE(MT6370_IRQ_CHG_VBATOV, 8),
  47         REGMAP_IRQ_REG_LINE(MT6370_IRQ_CHG_VINOVPCHG, 8),
  48         REGMAP_IRQ_REG_LINE(MT6370_IRQ_TS_BAT_COLD, 8),
  49         REGMAP_IRQ_REG_LINE(MT6370_IRQ_TS_BAT_COOL, 8),
  50         REGMAP_IRQ_REG_LINE(MT6370_IRQ_TS_BAT_WARM, 8),
  51         REGMAP_IRQ_REG_LINE(MT6370_IRQ_TS_BAT_HOT, 8),
  52         REGMAP_IRQ_REG_LINE(MT6370_IRQ_TS_STATC, 8),
  53         REGMAP_IRQ_REG_LINE(MT6370_IRQ_CHG_FAULT, 8),
  54         REGMAP_IRQ_REG_LINE(MT6370_IRQ_CHG_STATC, 8),
  55         REGMAP_IRQ_REG_LINE(MT6370_IRQ_CHG_TMR, 8),
  56         REGMAP_IRQ_REG_LINE(MT6370_IRQ_CHG_BATABS, 8),
  57         REGMAP_IRQ_REG_LINE(MT6370_IRQ_CHG_ADPBAD, 8),
  58         REGMAP_IRQ_REG_LINE(MT6370_IRQ_CHG_RVP, 8),
  59         REGMAP_IRQ_REG_LINE(MT6370_IRQ_TSHUTDOWN, 8),
  60         REGMAP_IRQ_REG_LINE(MT6370_IRQ_CHG_IINMEAS, 8),
  61         REGMAP_IRQ_REG_LINE(MT6370_IRQ_CHG_ICCMEAS, 8),
  62         REGMAP_IRQ_REG_LINE(MT6370_IRQ_CHGDET_DONE, 8),
  63         REGMAP_IRQ_REG_LINE(MT6370_IRQ_WDTMR, 8),
  64         REGMAP_IRQ_REG_LINE(MT6370_IRQ_SSFINISH, 8),
  65         REGMAP_IRQ_REG_LINE(MT6370_IRQ_CHG_RECHG, 8),
  66         REGMAP_IRQ_REG_LINE(MT6370_IRQ_CHG_TERM, 8),
  67         REGMAP_IRQ_REG_LINE(MT6370_IRQ_CHG_IEOC, 8),
  68         REGMAP_IRQ_REG_LINE(MT6370_IRQ_ADC_DONE, 8),
  69         REGMAP_IRQ_REG_LINE(MT6370_IRQ_PUMPX_DONE, 8),
  70         REGMAP_IRQ_REG_LINE(MT6370_IRQ_BST_BATUV, 8),
  71         REGMAP_IRQ_REG_LINE(MT6370_IRQ_BST_MIDOV, 8),
  72         REGMAP_IRQ_REG_LINE(MT6370_IRQ_BST_OLP, 8),
  73         REGMAP_IRQ_REG_LINE(MT6370_IRQ_ATTACH, 8),
  74         REGMAP_IRQ_REG_LINE(MT6370_IRQ_DETACH, 8),
  75         REGMAP_IRQ_REG_LINE(MT6370_IRQ_HVDCP_STPDONE, 8),
  76         REGMAP_IRQ_REG_LINE(MT6370_IRQ_HVDCP_VBUSDET_DONE, 8),
  77         REGMAP_IRQ_REG_LINE(MT6370_IRQ_HVDCP_DET, 8),
  78         REGMAP_IRQ_REG_LINE(MT6370_IRQ_CHGDET, 8),
  79         REGMAP_IRQ_REG_LINE(MT6370_IRQ_DCDT, 8),
  80         REGMAP_IRQ_REG_LINE(MT6370_IRQ_DIRCHG_VGOK, 8),
  81         REGMAP_IRQ_REG_LINE(MT6370_IRQ_DIRCHG_WDTMR, 8),
  82         REGMAP_IRQ_REG_LINE(MT6370_IRQ_DIRCHG_UC, 8),
  83         REGMAP_IRQ_REG_LINE(MT6370_IRQ_DIRCHG_OC, 8),
  84         REGMAP_IRQ_REG_LINE(MT6370_IRQ_DIRCHG_OV, 8),
  85         REGMAP_IRQ_REG_LINE(MT6370_IRQ_OVPCTRL_SWON, 8),
  86         REGMAP_IRQ_REG_LINE(MT6370_IRQ_OVPCTRL_UVP_D, 8),
  87         REGMAP_IRQ_REG_LINE(MT6370_IRQ_OVPCTRL_UVP, 8),
  88         REGMAP_IRQ_REG_LINE(MT6370_IRQ_OVPCTRL_OVP_D, 8),
  89         REGMAP_IRQ_REG_LINE(MT6370_IRQ_OVPCTRL_OVP, 8),
  90         REGMAP_IRQ_REG_LINE(MT6370_IRQ_FLED_STRBPIN, 8),
  91         REGMAP_IRQ_REG_LINE(MT6370_IRQ_FLED_TORPIN, 8),
  92         REGMAP_IRQ_REG_LINE(MT6370_IRQ_FLED_TX, 8),
  93         REGMAP_IRQ_REG_LINE(MT6370_IRQ_FLED_LVF, 8),
  94         REGMAP_IRQ_REG_LINE(MT6370_IRQ_FLED2_SHORT, 8),
  95         REGMAP_IRQ_REG_LINE(MT6370_IRQ_FLED1_SHORT, 8),
  96         REGMAP_IRQ_REG_LINE(MT6370_IRQ_FLED2_STRB, 8),
  97         REGMAP_IRQ_REG_LINE(MT6370_IRQ_FLED1_STRB, 8),
  98         REGMAP_IRQ_REG_LINE(mT6370_IRQ_FLED2_STRB_TO, 8),
  99         REGMAP_IRQ_REG_LINE(MT6370_IRQ_FLED1_STRB_TO, 8),
 100         REGMAP_IRQ_REG_LINE(MT6370_IRQ_FLED2_TOR, 8),
 101         REGMAP_IRQ_REG_LINE(MT6370_IRQ_FLED1_TOR, 8),
 102         REGMAP_IRQ_REG_LINE(MT6370_IRQ_OTP, 8),
 103         REGMAP_IRQ_REG_LINE(MT6370_IRQ_VDDA_OVP, 8),
 104         REGMAP_IRQ_REG_LINE(MT6370_IRQ_VDDA_UV, 8),
 105         REGMAP_IRQ_REG_LINE(MT6370_IRQ_LDO_OC, 8),
 106         REGMAP_IRQ_REG_LINE(MT6370_IRQ_BLED_OCP, 8),
 107         REGMAP_IRQ_REG_LINE(MT6370_IRQ_BLED_OVP, 8),
 108         REGMAP_IRQ_REG_LINE(MT6370_IRQ_DSV_VNEG_OCP, 8),
 109         REGMAP_IRQ_REG_LINE(MT6370_IRQ_DSV_VPOS_OCP, 8),
 110         REGMAP_IRQ_REG_LINE(MT6370_IRQ_DSV_BST_OCP, 8),
 111         REGMAP_IRQ_REG_LINE(MT6370_IRQ_DSV_VNEG_SCP, 8),
 112         REGMAP_IRQ_REG_LINE(MT6370_IRQ_DSV_VPOS_SCP, 8),
 113 };
 114
 115 static const struct regmap_irq_chip mt6370_irq_chip = {
 116         .name           = "mt6370-irqs",
 117         .status_base    = MT6370_REG_CHG_IRQ1,
 118         .mask_base      = MT6370_REG_CHG_MASK1,
 119         .num_regs       = MT6370_NUM_IRQREGS,
 120         .irqs           = mt6370_irqs,
 121         .num_irqs       = ARRAY_SIZE(mt6370_irqs),
 122 };
 123
 124 static const struct resource mt6370_regulator_irqs[] = {
 125         DEFINE_RES_IRQ_NAMED(MT6370_IRQ_DSV_VPOS_SCP, "db_vpos_scp"),
 126         DEFINE_RES_IRQ_NAMED(MT6370_IRQ_DSV_VNEG_SCP, "db_vneg_scp"),
 127         DEFINE_RES_IRQ_NAMED(MT6370_IRQ_DSV_BST_OCP, "db_vbst_ocp"),
 128         DEFINE_RES_IRQ_NAMED(MT6370_IRQ_DSV_VPOS_OCP, "db_vpos_ocp"),
 129         DEFINE_RES_IRQ_NAMED(MT6370_IRQ_DSV_VNEG_OCP, "db_vneg_ocp"),
 130         DEFINE_RES_IRQ_NAMED(MT6370_IRQ_LDO_OC, "ldo_oc"),
 131 };
 132
 133 static const struct mfd_cell mt6370_devices[] = {
 134         MFD_CELL_OF("mt6370-adc",
 135                     NULL, NULL, 0, 0, "mediatek,mt6370-adc"),
 136         MFD_CELL_OF("mt6370-charger",
 137                     NULL, NULL, 0, 0, "mediatek,mt6370-charger"),
 138         MFD_CELL_OF("mt6370-flashlight",
 139                     NULL, NULL, 0, 0, "mediatek,mt6370-flashlight"),
 140         MFD_CELL_OF("mt6370-indicator",
 141                     NULL, NULL, 0, 0, "mediatek,mt6370-indicator"),
 142         MFD_CELL_OF("mt6370-tcpc",
 143                     NULL, NULL, 0, 0, "mediatek,mt6370-tcpc"),
 144         MFD_CELL_RES("mt6370-regulator", mt6370_regulator_irqs),
 145 };
 146
 147 static const struct mfd_cell mt6370_exclusive_devices[] = {
 148         MFD_CELL_OF("mt6370-backlight",
 149                     NULL, NULL, 0, 0, "mediatek,mt6370-backlight"),
 150 };
 151
 152 static const struct mfd_cell mt6372_exclusive_devices[] = {
 153         MFD_CELL_OF("mt6370-backlight",
 154                     NULL, NULL, 0, 0, "mediatek,mt6372-backlight"),
 155 };
 156
 157 static int mt6370_check_vendor_info(struct device *dev, struct regmap *rmap,
 158                                     int *vid)
 159 {
 160         unsigned int devinfo;
 161         int ret;
 162
 163         ret = regmap_read(rmap, MT6370_REG_DEV_INFO, &devinfo);
 164         if (ret)
 165                 return ret;
 166
 167         *vid = FIELD_GET(MT6370_VENID_MASK, devinfo);
 168         switch (*vid) {
 169         case MT6370_VENID_RT5081:
 170         case MT6370_VENID_RT5081A:
 171         case MT6370_VENID_MT6370:
 172         case MT6370_VENID_MT6371:
 173         case MT6370_VENID_MT6372P:
 174         case MT6370_VENID_MT6372CP:
 175                 return 0;
 176         default:
 177                 dev_err(dev, "Unknown Vendor ID 0x%02x\n", devinfo);
 178                 return -ENODEV;
 179         }
 180 }
 181
 182 static int mt6370_regmap_read(void *context, const void *reg_buf,
 183                               size_t reg_size, void *val_buf, size_t val_size)
 184 {
 185         struct mt6370_info *info = context;
 186         const u8 *u8_buf = reg_buf;
 187         u8 bank_idx, bank_addr;
 188         int ret;
 189
 190         bank_idx = u8_buf[0];
 191         bank_addr = u8_buf[1];
 192
 193         ret = i2c_smbus_read_i2c_block_data(info->i2c[bank_idx], bank_addr,
 194                                             val_size, val_buf);
 195         if (ret < 0)
 196                 return ret;
 197
 198         if (ret != val_size)
 199                 return -EIO;
 200
 201         return 0;
 202 }
 203
 204 static int mt6370_regmap_write(void *context, const void *data, size_t count)
 205 {
 206         struct mt6370_info *info = context;
 207         const u8 *u8_buf = data;
 208         u8 bank_idx, bank_addr;
 209         int len = count - MT6370_MAX_ADDRLEN;
 210
 211         bank_idx = u8_buf[0];
 212         bank_addr = u8_buf[1];
 213
 214         return i2c_smbus_write_i2c_block_data(info->i2c[bank_idx], bank_addr,
 215                                               len, data + MT6370_MAX_ADDRLEN);
 216 }
 217
 218 static const struct regmap_bus mt6370_regmap_bus = {
 219         .read           = mt6370_regmap_read,
 220         .write          = mt6370_regmap_write,
 221 };
 222
 223 static const struct regmap_config mt6370_regmap_config = {
 224         .reg_bits               = 16,
 225         .val_bits               = 8,
 226         .reg_format_endian      = REGMAP_ENDIAN_BIG,
 227         .max_register           = MT6370_REG_MAXADDR,
 228 };
 229
 230 static int mt6370_probe(struct i2c_client *i2c)
 231 {
 232         struct mt6370_info *info;
 233         struct i2c_client *usbc_i2c;
 234         struct regmap *regmap;
 235         struct device *dev = &i2c->dev;
 236         int ret, vid;
 237
 238         info = devm_kzalloc(dev, sizeof(*info), GFP_KERNEL);
 239         if (!info)
 240                 return -ENOMEM;
 241
 242         usbc_i2c = devm_i2c_new_dummy_device(dev, i2c->adapter,
 243                                              MT6370_USBC_I2CADDR);
 244         if (IS_ERR(usbc_i2c))
 245                 return dev_err_probe(dev, PTR_ERR(usbc_i2c),
 246                                      "Failed to register USBC I2C client\n");
 247
 248         /* Assign I2C client for PMU and TypeC */
 249         info->i2c[MT6370_PMU_I2C] = i2c;
 250         info->i2c[MT6370_USBC_I2C] = usbc_i2c;
 251
 252         regmap = devm_regmap_init(dev, &mt6370_regmap_bus,
 253                                   info, &mt6370_regmap_config);
 254         if (IS_ERR(regmap))
 255                 return dev_err_probe(dev, PTR_ERR(regmap),
 256                                      "Failed to init regmap\n");
 257
 258         ret = mt6370_check_vendor_info(dev, regmap, &vid);
 259         if (ret)
 260                 return dev_err_probe(dev, ret, "Failed to check vendor info\n");
 261
 262         ret = devm_regmap_add_irq_chip(dev, regmap, i2c->irq,
 263                                        IRQF_ONESHOT, -1, &mt6370_irq_chip,
 264                                        &info->irq_data);
 265         if (ret)
 266                 return dev_err_probe(dev, ret, "Failed to add irq chip\n");
 267
 268         switch (vid) {
 269         case MT6370_VENID_MT6372P:
 270         case MT6370_VENID_MT6372CP:
 271                 ret = devm_mfd_add_devices(dev, PLATFORM_DEVID_AUTO,
 272                                            mt6372_exclusive_devices,
 273                                            ARRAY_SIZE(mt6372_exclusive_devices),
 274                                            NULL, 0,
 275                                            regmap_irq_get_domain(info->irq_data));
 276                 break;
 277         default:
 278                 ret = devm_mfd_add_devices(dev, PLATFORM_DEVID_AUTO,
 279                                            mt6370_exclusive_devices,
 280                                            ARRAY_SIZE(mt6370_exclusive_devices),
 281                                            NULL, 0,
 282                                            regmap_irq_get_domain(info->irq_data));
 283                 break;
 284         }
 285
 286         if (ret)
 287                 return dev_err_probe(dev, ret, "Failed to add the exclusive devices\n");
 288
 289         return devm_mfd_add_devices(dev, PLATFORM_DEVID_AUTO,
 290                                     mt6370_devices, ARRAY_SIZE(mt6370_devices),
 291                                     NULL, 0,
 292                                     regmap_irq_get_domain(info->irq_data));
 293 }
 294
 295 static const struct of_device_id mt6370_match_table[] = {
 296         { .compatible = "mediatek,mt6370" },
 297         {}
 298 };
 299 MODULE_DEVICE_TABLE(of, mt6370_match_table);
 300
 301 static struct i2c_driver mt6370_driver = {
 302         .driver = {
 303                 .name = "mt6370",
 304                 .of_match_table = mt6370_match_table,
 305         },
 306         .probe = mt6370_probe,
 307 };
 308 module_i2c_driver(mt6370_driver);
 309
 310 MODULE_AUTHOR("ChiYuan Huang <cy_huang@richtek.com>");
 311 MODULE_DESCRIPTION("MediaTek MT6370 SubPMIC Driver");
 312 MODULE_LICENSE("GPL v2");