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
22 static 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
38 static 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
chtdc_ti_pmic_get_power(struct regmap * regmap,int reg,int bit,u64 * value)68 static 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
chtdc_ti_pmic_update_power(struct regmap * regmap,int reg,int bit,bool on)80 static 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
chtdc_ti_pmic_get_raw_temp(struct regmap * regmap,int reg)86 static 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
97 static 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 };
106
chtdc_ti_pmic_opregion_probe(struct platform_device * pdev)107 static int chtdc_ti_pmic_opregion_probe(struct platform_device *pdev)
108 {
109 struct intel_soc_pmic *pmic = dev_get_drvdata(pdev->dev.parent);
110 int err;
111
112 err = intel_pmic_install_opregion_handler(&pdev->dev,
113 ACPI_HANDLE(pdev->dev.parent), pmic->regmap,
114 &chtdc_ti_pmic_opregion_data);
115 if (err < 0)
116 return err;
117
118 /* Re-enumerate devices depending on PMIC */
119 acpi_walk_dep_device_list(ACPI_HANDLE(pdev->dev.parent));
120 return 0;
121 }
122
123 static const struct platform_device_id chtdc_ti_pmic_opregion_id_table[] = {
124 { .name = "chtdc_ti_region" },
125 {},
126 };
127
128 static struct platform_driver chtdc_ti_pmic_opregion_driver = {
129 .probe = chtdc_ti_pmic_opregion_probe,
130 .driver = {
131 .name = "cht_dollar_cove_ti_pmic",
132 },
133 .id_table = chtdc_ti_pmic_opregion_id_table,
134 };
135 builtin_platform_driver(chtdc_ti_pmic_opregion_driver);
136
