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Josh Cartwrightc3a973a2014-08-01 17:30:48 +03001/*
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
Ivan T. Ivanovdc716bb2015-03-17 12:47:24 +020020#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
43static 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
61static 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
Josh Cartwrightc3a973a2014-08-01 17:30:48 +0300114static 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
121static 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
Ivan T. Ivanov742dcd12015-11-17 16:06:44 -0800130 /* Only the first slave id for a PMIC contains this information */
131 if (sdev->usid % 2 == 0)
132 pmic_spmi_show_revid(regmap, &sdev->dev);
Ivan T. Ivanovdc716bb2015-03-17 12:47:24 +0200133
Josh Cartwrightc3a973a2014-08-01 17:30:48 +0300134 return of_platform_populate(root, NULL, NULL, &sdev->dev);
135}
136
137static void pmic_spmi_remove(struct spmi_device *sdev)
138{
139 of_platform_depopulate(&sdev->dev);
140}
141
Josh Cartwrightc3a973a2014-08-01 17:30:48 +0300142MODULE_DEVICE_TABLE(of, pmic_spmi_id_table);
143
144static struct spmi_driver pmic_spmi_driver = {
145 .probe = pmic_spmi_probe,
146 .remove = pmic_spmi_remove,
147 .driver = {
148 .name = "pmic-spmi",
149 .of_match_table = pmic_spmi_id_table,
150 },
151};
152module_spmi_driver(pmic_spmi_driver);
153
154MODULE_DESCRIPTION("Qualcomm SPMI PMIC driver");
155MODULE_ALIAS("spmi:spmi-pmic");
156MODULE_LICENSE("GPL v2");
157MODULE_AUTHOR("Josh Cartwright <joshc@codeaurora.org>");
158MODULE_AUTHOR("Stanimir Varbanov <svarbanov@mm-sol.com>");