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