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 PM8028_SUBTYPE 0x0e 35 #define PM8901_SUBTYPE 0x0f 36 #define PM8950_SUBTYPE 0x10 37 #define PMI8950_SUBTYPE 0x11 38 #define PM8998_SUBTYPE 0x14 39 #define PMI8998_SUBTYPE 0x15 40 #define PM8005_SUBTYPE 0x18 41 #define PM660L_SUBTYPE 0x1A 42 #define PM660_SUBTYPE 0x1B 43 #define PM8150_SUBTYPE 0x1E 44 #define PM8150L_SUBTYPE 0x1f 45 #define PM8150B_SUBTYPE 0x20 46 #define PMK8002_SUBTYPE 0x21 47 #define PM8009_SUBTYPE 0x24 48 #define PM8150C_SUBTYPE 0x26 49 #define SMB2351_SUBTYPE 0x29 50 51 static const struct of_device_id pmic_spmi_id_table[] = { 52 { .compatible = "qcom,pm660", .data = (void *)PM660_SUBTYPE }, 53 { .compatible = "qcom,pm660l", .data = (void *)PM660L_SUBTYPE }, 54 { .compatible = "qcom,pm8004", .data = (void *)PM8004_SUBTYPE }, 55 { .compatible = "qcom,pm8005", .data = (void *)PM8005_SUBTYPE }, 56 { .compatible = "qcom,pm8019", .data = (void *)PM8019_SUBTYPE }, 57 { .compatible = "qcom,pm8028", .data = (void *)PM8028_SUBTYPE }, 58 { .compatible = "qcom,pm8110", .data = (void *)PM8110_SUBTYPE }, 59 { .compatible = "qcom,pm8150", .data = (void *)PM8150_SUBTYPE }, 60 { .compatible = "qcom,pm8150b", .data = (void *)PM8150B_SUBTYPE }, 61 { .compatible = "qcom,pm8150c", .data = (void *)PM8150C_SUBTYPE }, 62 { .compatible = "qcom,pm8150l", .data = (void *)PM8150L_SUBTYPE }, 63 { .compatible = "qcom,pm8226", .data = (void *)PM8226_SUBTYPE }, 64 { .compatible = "qcom,pm8841", .data = (void *)PM8841_SUBTYPE }, 65 { .compatible = "qcom,pm8901", .data = (void *)PM8901_SUBTYPE }, 66 { .compatible = "qcom,pm8909", .data = (void *)PM8909_SUBTYPE }, 67 { .compatible = "qcom,pm8916", .data = (void *)PM8916_SUBTYPE }, 68 { .compatible = "qcom,pm8941", .data = (void *)PM8941_SUBTYPE }, 69 { .compatible = "qcom,pm8950", .data = (void *)PM8950_SUBTYPE }, 70 { .compatible = "qcom,pm8994", .data = (void *)PM8994_SUBTYPE }, 71 { .compatible = "qcom,pm8998", .data = (void *)PM8998_SUBTYPE }, 72 { .compatible = "qcom,pma8084", .data = (void *)PMA8084_SUBTYPE }, 73 { .compatible = "qcom,pmd9635", .data = (void *)PMD9635_SUBTYPE }, 74 { .compatible = "qcom,pmi8950", .data = (void *)PMI8950_SUBTYPE }, 75 { .compatible = "qcom,pmi8962", .data = (void *)PMI8962_SUBTYPE }, 76 { .compatible = "qcom,pmi8994", .data = (void *)PMI8994_SUBTYPE }, 77 { .compatible = "qcom,pmi8998", .data = (void *)PMI8998_SUBTYPE }, 78 { .compatible = "qcom,pmk8002", .data = (void *)PMK8002_SUBTYPE }, 79 { .compatible = "qcom,smb2351", .data = (void *)SMB2351_SUBTYPE }, 80 { .compatible = "qcom,spmi-pmic", .data = (void *)COMMON_SUBTYPE }, 81 { } 82 }; 83 84 static void pmic_spmi_show_revid(struct regmap *map, struct device *dev) 85 { 86 unsigned int rev2, minor, major, type, subtype; 87 const char *name = "unknown"; 88 int ret, i; 89 90 ret = regmap_read(map, PMIC_TYPE, &type); 91 if (ret < 0) 92 return; 93 94 if (type != PMIC_TYPE_VALUE) 95 return; 96 97 ret = regmap_read(map, PMIC_SUBTYPE, &subtype); 98 if (ret < 0) 99 return; 100 101 for (i = 0; i < ARRAY_SIZE(pmic_spmi_id_table); i++) { 102 if (subtype == (unsigned long)pmic_spmi_id_table[i].data) 103 break; 104 } 105 106 if (i != ARRAY_SIZE(pmic_spmi_id_table)) 107 name = pmic_spmi_id_table[i].compatible; 108 109 ret = regmap_read(map, PMIC_REV2, &rev2); 110 if (ret < 0) 111 return; 112 113 ret = regmap_read(map, PMIC_REV3, &minor); 114 if (ret < 0) 115 return; 116 117 ret = regmap_read(map, PMIC_REV4, &major); 118 if (ret < 0) 119 return; 120 121 /* 122 * In early versions of PM8941 and PM8226, the major revision number 123 * started incrementing from 0 (eg 0 = v1.0, 1 = v2.0). 124 * Increment the major revision number here if the chip is an early 125 * version of PM8941 or PM8226. 126 */ 127 if ((subtype == PM8941_SUBTYPE || subtype == PM8226_SUBTYPE) && 128 major < 0x02) 129 major++; 130 131 if (subtype == PM8110_SUBTYPE) 132 minor = rev2; 133 134 dev_dbg(dev, "%x: %s v%d.%d\n", subtype, name, major, minor); 135 } 136 137 static const struct regmap_config spmi_regmap_config = { 138 .reg_bits = 16, 139 .val_bits = 8, 140 .max_register = 0xffff, 141 .fast_io = true, 142 }; 143 144 static int pmic_spmi_probe(struct spmi_device *sdev) 145 { 146 struct regmap *regmap; 147 148 regmap = devm_regmap_init_spmi_ext(sdev, &spmi_regmap_config); 149 if (IS_ERR(regmap)) 150 return PTR_ERR(regmap); 151 152 /* Only the first slave id for a PMIC contains this information */ 153 if (sdev->usid % 2 == 0) 154 pmic_spmi_show_revid(regmap, &sdev->dev); 155 156 return devm_of_platform_populate(&sdev->dev); 157 } 158 159 MODULE_DEVICE_TABLE(of, pmic_spmi_id_table); 160 161 static struct spmi_driver pmic_spmi_driver = { 162 .probe = pmic_spmi_probe, 163 .driver = { 164 .name = "pmic-spmi", 165 .of_match_table = pmic_spmi_id_table, 166 }, 167 }; 168 module_spmi_driver(pmic_spmi_driver); 169 170 MODULE_DESCRIPTION("Qualcomm SPMI PMIC driver"); 171 MODULE_ALIAS("spmi:spmi-pmic"); 172 MODULE_LICENSE("GPL v2"); 173 MODULE_AUTHOR("Josh Cartwright <joshc@codeaurora.org>"); 174 MODULE_AUTHOR("Stanimir Varbanov <svarbanov@mm-sol.com>"); 175