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#define PM660L_SUBTYPE		0x1A
 40#define PM660_SUBTYPE		0x1B
 41
 42static const struct of_device_id pmic_spmi_id_table[] = {
 43	{ .compatible = "qcom,spmi-pmic", .data = (void *)COMMON_SUBTYPE },
 44	{ .compatible = "qcom,pm8941",    .data = (void *)PM8941_SUBTYPE },
 45	{ .compatible = "qcom,pm8841",    .data = (void *)PM8841_SUBTYPE },
 46	{ .compatible = "qcom,pm8019",    .data = (void *)PM8019_SUBTYPE },
 47	{ .compatible = "qcom,pm8226",    .data = (void *)PM8226_SUBTYPE },
 48	{ .compatible = "qcom,pm8110",    .data = (void *)PM8110_SUBTYPE },
 49	{ .compatible = "qcom,pma8084",   .data = (void *)PMA8084_SUBTYPE },
 50	{ .compatible = "qcom,pmi8962",   .data = (void *)PMI8962_SUBTYPE },
 51	{ .compatible = "qcom,pmd9635",   .data = (void *)PMD9635_SUBTYPE },
 52	{ .compatible = "qcom,pm8994",    .data = (void *)PM8994_SUBTYPE },
 53	{ .compatible = "qcom,pmi8994",   .data = (void *)PMI8994_SUBTYPE },
 54	{ .compatible = "qcom,pm8916",    .data = (void *)PM8916_SUBTYPE },
 55	{ .compatible = "qcom,pm8004",    .data = (void *)PM8004_SUBTYPE },
 56	{ .compatible = "qcom,pm8909",    .data = (void *)PM8909_SUBTYPE },
 57	{ .compatible = "qcom,pm8950",    .data = (void *)PM8950_SUBTYPE },
 58	{ .compatible = "qcom,pmi8950",   .data = (void *)PMI8950_SUBTYPE },
 59	{ .compatible = "qcom,pm8998",    .data = (void *)PM8998_SUBTYPE },
 60	{ .compatible = "qcom,pmi8998",   .data = (void *)PMI8998_SUBTYPE },
 61	{ .compatible = "qcom,pm8005",    .data = (void *)PM8005_SUBTYPE },
 62	{ .compatible = "qcom,pm660l",    .data = (void *)PM660L_SUBTYPE },
 63	{ .compatible = "qcom,pm660",     .data = (void *)PM660_SUBTYPE },
 64	{ }
 65};
 66
 67static void pmic_spmi_show_revid(struct regmap *map, struct device *dev)
 68{
 69	unsigned int rev2, minor, major, type, subtype;
 70	const char *name = "unknown";
 71	int ret, i;
 72
 73	ret = regmap_read(map, PMIC_TYPE, &type);
 74	if (ret < 0)
 75		return;
 76
 77	if (type != PMIC_TYPE_VALUE)
 78		return;
 79
 80	ret = regmap_read(map, PMIC_SUBTYPE, &subtype);
 81	if (ret < 0)
 82		return;
 83
 84	for (i = 0; i < ARRAY_SIZE(pmic_spmi_id_table); i++) {
 85		if (subtype == (unsigned long)pmic_spmi_id_table[i].data)
 86			break;
 87	}
 88
 89	if (i != ARRAY_SIZE(pmic_spmi_id_table))
 90		name = pmic_spmi_id_table[i].compatible;
 91
 92	ret = regmap_read(map, PMIC_REV2, &rev2);
 93	if (ret < 0)
 94		return;
 95
 96	ret = regmap_read(map, PMIC_REV3, &minor);
 97	if (ret < 0)
 98		return;
 99
100	ret = regmap_read(map, PMIC_REV4, &major);
101	if (ret < 0)
102		return;
103
104	/*
105	 * In early versions of PM8941 and PM8226, the major revision number
106	 * started incrementing from 0 (eg 0 = v1.0, 1 = v2.0).
107	 * Increment the major revision number here if the chip is an early
108	 * version of PM8941 or PM8226.
109	 */
110	if ((subtype == PM8941_SUBTYPE || subtype == PM8226_SUBTYPE) &&
111	    major < 0x02)
112		major++;
113
114	if (subtype == PM8110_SUBTYPE)
115		minor = rev2;
116
117	dev_dbg(dev, "%x: %s v%d.%d\n", subtype, name, major, minor);
118}
119
120static const struct regmap_config spmi_regmap_config = {
121	.reg_bits	= 16,
122	.val_bits	= 8,
123	.max_register	= 0xffff,
124	.fast_io	= true,
125};
126
127static int pmic_spmi_probe(struct spmi_device *sdev)
128{
129	struct regmap *regmap;
130
131	regmap = devm_regmap_init_spmi_ext(sdev, &spmi_regmap_config);
132	if (IS_ERR(regmap))
133		return PTR_ERR(regmap);
134
135	/* Only the first slave id for a PMIC contains this information */
136	if (sdev->usid % 2 == 0)
137		pmic_spmi_show_revid(regmap, &sdev->dev);
138
139	return devm_of_platform_populate(&sdev->dev);
140}
141
142MODULE_DEVICE_TABLE(of, pmic_spmi_id_table);
143
144static struct spmi_driver pmic_spmi_driver = {
145	.probe = pmic_spmi_probe,
146	.driver = {
147		.name = "pmic-spmi",
148		.of_match_table = pmic_spmi_id_table,
149	},
150};
151module_spmi_driver(pmic_spmi_driver);
152
153MODULE_DESCRIPTION("Qualcomm SPMI PMIC driver");
154MODULE_ALIAS("spmi:spmi-pmic");
155MODULE_LICENSE("GPL v2");
156MODULE_AUTHOR("Josh Cartwright <joshc@codeaurora.org>");
157MODULE_AUTHOR("Stanimir Varbanov <svarbanov@mm-sol.com>");