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