1// SPDX-License-Identifier: GPL-2.0
2/*
3 * Dollar Cove TI PMIC operation region driver
4 * Copyright (C) 2014 Intel Corporation. All rights reserved.
5 *
6 * Rewritten and cleaned up
7 * Copyright (C) 2017 Takashi Iwai <tiwai@suse.de>
8 */
9
10#include <linux/acpi.h>
11#include <linux/init.h>
12#include <linux/mfd/intel_soc_pmic.h>
13#include <linux/platform_device.h>
14#include "intel_pmic.h"
15
16/* registers stored in 16bit BE (high:low, total 10bit) */
17#define CHTDC_TI_VBAT		0x54
18#define CHTDC_TI_DIETEMP	0x56
19#define CHTDC_TI_BPTHERM	0x58
20#define CHTDC_TI_GPADC		0x5a
21
22static struct pmic_table chtdc_ti_power_table[] = {
23	{ .address = 0x00, .reg = 0x41 },
24	{ .address = 0x04, .reg = 0x42 },
25	{ .address = 0x08, .reg = 0x43 },
26	{ .address = 0x0c, .reg = 0x45 },
27	{ .address = 0x10, .reg = 0x46 },
28	{ .address = 0x14, .reg = 0x47 },
29	{ .address = 0x18, .reg = 0x48 },
30	{ .address = 0x1c, .reg = 0x49 },
31	{ .address = 0x20, .reg = 0x4a },
32	{ .address = 0x24, .reg = 0x4b },
33	{ .address = 0x28, .reg = 0x4c },
34	{ .address = 0x2c, .reg = 0x4d },
35	{ .address = 0x30, .reg = 0x4e },
36};
37
38static struct pmic_table chtdc_ti_thermal_table[] = {
39	{
40		.address = 0x00,
41		.reg = CHTDC_TI_GPADC
42	},
43	{
44		.address = 0x0c,
45		.reg = CHTDC_TI_GPADC
46	},
47	/* TMP2 -> SYSTEMP */
48	{
49		.address = 0x18,
50		.reg = CHTDC_TI_GPADC
51	},
52	/* TMP3 -> BPTHERM */
53	{
54		.address = 0x24,
55		.reg = CHTDC_TI_BPTHERM
56	},
57	{
58		.address = 0x30,
59		.reg = CHTDC_TI_GPADC
60	},
61	/* TMP5 -> DIETEMP */
62	{
63		.address = 0x3c,
64		.reg = CHTDC_TI_DIETEMP
65	},
66};
67
68static int chtdc_ti_pmic_get_power(struct regmap *regmap, int reg, int bit,
69				   u64 *value)
70{
71	int data;
72
73	if (regmap_read(regmap, reg, &data))
74		return -EIO;
75
76	*value = data & 1;
77	return 0;
78}
79
80static int chtdc_ti_pmic_update_power(struct regmap *regmap, int reg, int bit,
81				      bool on)
82{
83	return regmap_update_bits(regmap, reg, 1, on);
84}
85
86static int chtdc_ti_pmic_get_raw_temp(struct regmap *regmap, int reg)
87{
88	u8 buf[2];
89
90	if (regmap_bulk_read(regmap, reg, buf, 2))
91		return -EIO;
92
93	/* stored in big-endian */
94	return ((buf[0] & 0x03) << 8) | buf[1];
95}
96
97static struct intel_pmic_opregion_data chtdc_ti_pmic_opregion_data = {
98	.get_power = chtdc_ti_pmic_get_power,
99	.update_power = chtdc_ti_pmic_update_power,
100	.get_raw_temp = chtdc_ti_pmic_get_raw_temp,
101	.power_table = chtdc_ti_power_table,
102	.power_table_count = ARRAY_SIZE(chtdc_ti_power_table),
103	.thermal_table = chtdc_ti_thermal_table,
104	.thermal_table_count = ARRAY_SIZE(chtdc_ti_thermal_table),
105	.pmic_i2c_address = 0x5e,
106};
107
108static int chtdc_ti_pmic_opregion_probe(struct platform_device *pdev)
109{
110	struct intel_soc_pmic *pmic = dev_get_drvdata(pdev->dev.parent);
111	int err;
112
113	err = intel_pmic_install_opregion_handler(&pdev->dev,
114			ACPI_HANDLE(pdev->dev.parent), pmic->regmap,
115			&chtdc_ti_pmic_opregion_data);
116	if (err < 0)
117		return err;
118
119	/* Re-enumerate devices depending on PMIC */
120	acpi_walk_dep_device_list(ACPI_HANDLE(pdev->dev.parent));
121	return 0;
122}
123
124static const struct platform_device_id chtdc_ti_pmic_opregion_id_table[] = {
125	{ .name = "chtdc_ti_region" },
126	{},
127};
128
129static struct platform_driver chtdc_ti_pmic_opregion_driver = {
130	.probe = chtdc_ti_pmic_opregion_probe,
131	.driver = {
132		.name = "cht_dollar_cove_ti_pmic",
133	},
134	.id_table = chtdc_ti_pmic_opregion_id_table,
135};
136builtin_platform_driver(chtdc_ti_pmic_opregion_driver);
137