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