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
pmic_spmi_show_revid(struct regmap * map,struct device * dev)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
pmic_spmi_probe(struct spmi_device * sdev)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