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c3a973a7 JC |
1 | /* |
2 | * Copyright (c) 2014, The Linux Foundation. All rights reserved. | |
3 | * | |
4 | * This program is free software; you can redistribute it and/or modify | |
5 | * it under the terms of the GNU General Public License version 2 and | |
6 | * only version 2 as published by the Free Software Foundation. | |
7 | * | |
8 | * This program is distributed in the hope that it will be useful, | |
9 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
10 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
11 | * GNU General Public License for more details. | |
12 | */ | |
13 | ||
14 | #include <linux/kernel.h> | |
15 | #include <linux/module.h> | |
16 | #include <linux/spmi.h> | |
17 | #include <linux/regmap.h> | |
18 | #include <linux/of_platform.h> | |
19 | ||
dc716bbf II |
20 | #define PMIC_REV2 0x101 |
21 | #define PMIC_REV3 0x102 | |
22 | #define PMIC_REV4 0x103 | |
23 | #define PMIC_TYPE 0x104 | |
24 | #define PMIC_SUBTYPE 0x105 | |
25 | ||
26 | #define PMIC_TYPE_VALUE 0x51 | |
27 | ||
28 | #define COMMON_SUBTYPE 0x00 | |
29 | #define PM8941_SUBTYPE 0x01 | |
30 | #define PM8841_SUBTYPE 0x02 | |
31 | #define PM8019_SUBTYPE 0x03 | |
32 | #define PM8226_SUBTYPE 0x04 | |
33 | #define PM8110_SUBTYPE 0x05 | |
34 | #define PMA8084_SUBTYPE 0x06 | |
35 | #define PMI8962_SUBTYPE 0x07 | |
36 | #define PMD9635_SUBTYPE 0x08 | |
37 | #define PM8994_SUBTYPE 0x09 | |
38 | #define PMI8994_SUBTYPE 0x0a | |
39 | #define PM8916_SUBTYPE 0x0b | |
40 | #define PM8004_SUBTYPE 0x0c | |
41 | #define PM8909_SUBTYPE 0x0d | |
42 | ||
43 | static const struct of_device_id pmic_spmi_id_table[] = { | |
44 | { .compatible = "qcom,spmi-pmic", .data = (void *)COMMON_SUBTYPE }, | |
45 | { .compatible = "qcom,pm8941", .data = (void *)PM8941_SUBTYPE }, | |
46 | { .compatible = "qcom,pm8841", .data = (void *)PM8841_SUBTYPE }, | |
47 | { .compatible = "qcom,pm8019", .data = (void *)PM8019_SUBTYPE }, | |
48 | { .compatible = "qcom,pm8226", .data = (void *)PM8226_SUBTYPE }, | |
49 | { .compatible = "qcom,pm8110", .data = (void *)PM8110_SUBTYPE }, | |
50 | { .compatible = "qcom,pma8084", .data = (void *)PMA8084_SUBTYPE }, | |
51 | { .compatible = "qcom,pmi8962", .data = (void *)PMI8962_SUBTYPE }, | |
52 | { .compatible = "qcom,pmd9635", .data = (void *)PMD9635_SUBTYPE }, | |
53 | { .compatible = "qcom,pm8994", .data = (void *)PM8994_SUBTYPE }, | |
54 | { .compatible = "qcom,pmi8994", .data = (void *)PMI8994_SUBTYPE }, | |
55 | { .compatible = "qcom,pm8916", .data = (void *)PM8916_SUBTYPE }, | |
56 | { .compatible = "qcom,pm8004", .data = (void *)PM8004_SUBTYPE }, | |
57 | { .compatible = "qcom,pm8909", .data = (void *)PM8909_SUBTYPE }, | |
58 | { } | |
59 | }; | |
60 | ||
61 | static void pmic_spmi_show_revid(struct regmap *map, struct device *dev) | |
62 | { | |
63 | unsigned int rev2, minor, major, type, subtype; | |
64 | const char *name = "unknown"; | |
65 | int ret, i; | |
66 | ||
67 | ret = regmap_read(map, PMIC_TYPE, &type); | |
68 | if (ret < 0) | |
69 | return; | |
70 | ||
71 | if (type != PMIC_TYPE_VALUE) | |
72 | return; | |
73 | ||
74 | ret = regmap_read(map, PMIC_SUBTYPE, &subtype); | |
75 | if (ret < 0) | |
76 | return; | |
77 | ||
78 | for (i = 0; i < ARRAY_SIZE(pmic_spmi_id_table); i++) { | |
79 | if (subtype == (unsigned long)pmic_spmi_id_table[i].data) | |
80 | break; | |
81 | } | |
82 | ||
83 | if (i != ARRAY_SIZE(pmic_spmi_id_table)) | |
84 | name = pmic_spmi_id_table[i].compatible; | |
85 | ||
86 | ret = regmap_read(map, PMIC_REV2, &rev2); | |
87 | if (ret < 0) | |
88 | return; | |
89 | ||
90 | ret = regmap_read(map, PMIC_REV3, &minor); | |
91 | if (ret < 0) | |
92 | return; | |
93 | ||
94 | ret = regmap_read(map, PMIC_REV4, &major); | |
95 | if (ret < 0) | |
96 | return; | |
97 | ||
98 | /* | |
99 | * In early versions of PM8941 and PM8226, the major revision number | |
100 | * started incrementing from 0 (eg 0 = v1.0, 1 = v2.0). | |
101 | * Increment the major revision number here if the chip is an early | |
102 | * version of PM8941 or PM8226. | |
103 | */ | |
104 | if ((subtype == PM8941_SUBTYPE || subtype == PM8226_SUBTYPE) && | |
105 | major < 0x02) | |
106 | major++; | |
107 | ||
108 | if (subtype == PM8110_SUBTYPE) | |
109 | minor = rev2; | |
110 | ||
111 | dev_dbg(dev, "%x: %s v%d.%d\n", subtype, name, major, minor); | |
112 | } | |
113 | ||
c3a973a7 JC |
114 | static const struct regmap_config spmi_regmap_config = { |
115 | .reg_bits = 16, | |
116 | .val_bits = 8, | |
117 | .max_register = 0xffff, | |
118 | .fast_io = true, | |
119 | }; | |
120 | ||
121 | static int pmic_spmi_probe(struct spmi_device *sdev) | |
122 | { | |
123 | struct device_node *root = sdev->dev.of_node; | |
124 | struct regmap *regmap; | |
125 | ||
126 | regmap = devm_regmap_init_spmi_ext(sdev, &spmi_regmap_config); | |
127 | if (IS_ERR(regmap)) | |
128 | return PTR_ERR(regmap); | |
129 | ||
dc716bbf II |
130 | pmic_spmi_show_revid(regmap, &sdev->dev); |
131 | ||
c3a973a7 JC |
132 | return of_platform_populate(root, NULL, NULL, &sdev->dev); |
133 | } | |
134 | ||
135 | static void pmic_spmi_remove(struct spmi_device *sdev) | |
136 | { | |
137 | of_platform_depopulate(&sdev->dev); | |
138 | } | |
139 | ||
c3a973a7 JC |
140 | MODULE_DEVICE_TABLE(of, pmic_spmi_id_table); |
141 | ||
142 | static struct spmi_driver pmic_spmi_driver = { | |
143 | .probe = pmic_spmi_probe, | |
144 | .remove = pmic_spmi_remove, | |
145 | .driver = { | |
146 | .name = "pmic-spmi", | |
147 | .of_match_table = pmic_spmi_id_table, | |
148 | }, | |
149 | }; | |
150 | module_spmi_driver(pmic_spmi_driver); | |
151 | ||
152 | MODULE_DESCRIPTION("Qualcomm SPMI PMIC driver"); | |
153 | MODULE_ALIAS("spmi:spmi-pmic"); | |
154 | MODULE_LICENSE("GPL v2"); | |
155 | MODULE_AUTHOR("Josh Cartwright <joshc@codeaurora.org>"); | |
156 | MODULE_AUTHOR("Stanimir Varbanov <svarbanov@mm-sol.com>"); |