drivers/mfd/qcom-spmi-pmic.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * Copyright (c) 2014, The Linux Foundation. All rights reserved.
   4  */
   5
   6 #include <linux/kernel.h>
   7 #include <linux/module.h>
   8 #include <linux/spmi.h>
   9 #include <linux/regmap.h>
  10 #include <linux/of_platform.h>
  11
  12 #define PMIC_REV2               0x101
  13 #define PMIC_REV3               0x102
  14 #define PMIC_REV4               0x103
  15 #define PMIC_TYPE               0x104
  16 #define PMIC_SUBTYPE            0x105
  17
  18 #define PMIC_TYPE_VALUE         0x51
  19
  20 #define COMMON_SUBTYPE          0x00
  21 #define PM8941_SUBTYPE          0x01
  22 #define PM8841_SUBTYPE          0x02
  23 #define PM8019_SUBTYPE          0x03
  24 #define PM8226_SUBTYPE          0x04
  25 #define PM8110_SUBTYPE          0x05
  26 #define PMA8084_SUBTYPE         0x06
  27 #define PMI8962_SUBTYPE         0x07
  28 #define PMD9635_SUBTYPE         0x08
  29 #define PM8994_SUBTYPE          0x09
  30 #define PMI8994_SUBTYPE         0x0a
  31 #define PM8916_SUBTYPE          0x0b
  32 #define PM8004_SUBTYPE          0x0c
  33 #define PM8909_SUBTYPE          0x0d
  34 #define PM8998_SUBTYPE          0x14
  35 #define PMI8998_SUBTYPE         0x15
  36 #define PM8005_SUBTYPE          0x18
  37
  38 static const struct of_device_id pmic_spmi_id_table[] = {
  39         { .compatible = "qcom,spmi-pmic", .data = (void *)COMMON_SUBTYPE },
  40         { .compatible = "qcom,pm8941",    .data = (void *)PM8941_SUBTYPE },
  41         { .compatible = "qcom,pm8841",    .data = (void *)PM8841_SUBTYPE },
  42         { .compatible = "qcom,pm8019",    .data = (void *)PM8019_SUBTYPE },
  43         { .compatible = "qcom,pm8226",    .data = (void *)PM8226_SUBTYPE },
  44         { .compatible = "qcom,pm8110",    .data = (void *)PM8110_SUBTYPE },
  45         { .compatible = "qcom,pma8084",   .data = (void *)PMA8084_SUBTYPE },
  46         { .compatible = "qcom,pmi8962",   .data = (void *)PMI8962_SUBTYPE },
  47         { .compatible = "qcom,pmd9635",   .data = (void *)PMD9635_SUBTYPE },
  48         { .compatible = "qcom,pm8994",    .data = (void *)PM8994_SUBTYPE },
  49         { .compatible = "qcom,pmi8994",   .data = (void *)PMI8994_SUBTYPE },
  50         { .compatible = "qcom,pm8916",    .data = (void *)PM8916_SUBTYPE },
  51         { .compatible = "qcom,pm8004",    .data = (void *)PM8004_SUBTYPE },
  52         { .compatible = "qcom,pm8909",    .data = (void *)PM8909_SUBTYPE },
  53         { .compatible = "qcom,pm8998",    .data = (void *)PM8998_SUBTYPE },
  54         { .compatible = "qcom,pmi8998",   .data = (void *)PMI8998_SUBTYPE },
  55         { .compatible = "qcom,pm8005",    .data = (void *)PM8005_SUBTYPE },
  56         { }
  57 };
  58
  59 static void pmic_spmi_show_revid(struct regmap *map, struct device *dev)
  60 {
  61         unsigned int rev2, minor, major, type, subtype;
  62         const char *name = "unknown";
  63         int ret, i;
  64
  65         ret = regmap_read(map, PMIC_TYPE, &type);
  66         if (ret < 0)
  67                 return;
  68
  69         if (type != PMIC_TYPE_VALUE)
  70                 return;
  71
  72         ret = regmap_read(map, PMIC_SUBTYPE, &subtype);
  73         if (ret < 0)
  74                 return;
  75
  76         for (i = 0; i < ARRAY_SIZE(pmic_spmi_id_table); i++) {
  77                 if (subtype == (unsigned long)pmic_spmi_id_table[i].data)
  78                         break;
  79         }
  80
  81         if (i != ARRAY_SIZE(pmic_spmi_id_table))
  82                 name = pmic_spmi_id_table[i].compatible;
  83
  84         ret = regmap_read(map, PMIC_REV2, &rev2);
  85         if (ret < 0)
  86                 return;
  87
  88         ret = regmap_read(map, PMIC_REV3, &minor);
  89         if (ret < 0)
  90                 return;
  91
  92         ret = regmap_read(map, PMIC_REV4, &major);
  93         if (ret < 0)
  94                 return;
  95
  96         /*
  97          * In early versions of PM8941 and PM8226, the major revision number
  98          * started incrementing from 0 (eg 0 = v1.0, 1 = v2.0).
  99          * Increment the major revision number here if the chip is an early
 100          * version of PM8941 or PM8226.
 101          */
 102         if ((subtype == PM8941_SUBTYPE || subtype == PM8226_SUBTYPE) &&
 103             major < 0x02)
 104                 major++;
 105
 106         if (subtype == PM8110_SUBTYPE)
 107                 minor = rev2;
 108
 109         dev_dbg(dev, "%x: %s v%d.%d\n", subtype, name, major, minor);
 110 }
 111
 112 static const struct regmap_config spmi_regmap_config = {
 113         .reg_bits       = 16,
 114         .val_bits       = 8,
 115         .max_register   = 0xffff,
 116         .fast_io        = true,
 117 };
 118
 119 static int pmic_spmi_probe(struct spmi_device *sdev)
 120 {
 121         struct regmap *regmap;
 122
 123         regmap = devm_regmap_init_spmi_ext(sdev, &spmi_regmap_config);
 124         if (IS_ERR(regmap))
 125                 return PTR_ERR(regmap);
 126
 127         /* Only the first slave id for a PMIC contains this information */
 128         if (sdev->usid % 2 == 0)
 129                 pmic_spmi_show_revid(regmap, &sdev->dev);
 130
 131         return devm_of_platform_populate(&sdev->dev);
 132 }
 133
 134 MODULE_DEVICE_TABLE(of, pmic_spmi_id_table);
 135
 136 static struct spmi_driver pmic_spmi_driver = {
 137         .probe = pmic_spmi_probe,
 138         .driver = {
 139                 .name = "pmic-spmi",
 140                 .of_match_table = pmic_spmi_id_table,
 141         },
 142 };
 143 module_spmi_driver(pmic_spmi_driver);
 144
 145 MODULE_DESCRIPTION("Qualcomm SPMI PMIC driver");
 146 MODULE_ALIAS("spmi:spmi-pmic");
 147 MODULE_LICENSE("GPL v2");
 148 MODULE_AUTHOR("Josh Cartwright <joshc@codeaurora.org>");
 149 MODULE_AUTHOR("Stanimir Varbanov <svarbanov@mm-sol.com>");