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
40static 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
63static 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
116static 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
123static 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
138MODULE_DEVICE_TABLE(of, pmic_spmi_id_table);
139
140static 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};
147module_spmi_driver(pmic_spmi_driver);
148
149MODULE_DESCRIPTION("Qualcomm SPMI PMIC driver");
150MODULE_ALIAS("spmi:spmi-pmic");
151MODULE_LICENSE("GPL v2");
152MODULE_AUTHOR("Josh Cartwright <joshc@codeaurora.org>");
153MODULE_AUTHOR("Stanimir Varbanov <svarbanov@mm-sol.com>");
154