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>"); 150