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d8139f63 AL |
1 | /* |
2 | * intel_pmic_xpower.c - XPower AXP288 PMIC operation region driver | |
3 | * | |
4 | * Copyright (C) 2014 Intel Corporation. All rights reserved. | |
5 | * | |
6 | * This program is free software; you can redistribute it and/or | |
7 | * modify it under the terms of the GNU General Public License version | |
8 | * 2 as published by the Free Software Foundation. | |
9 | * | |
10 | * This program is distributed in the hope that it will be useful, | |
11 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
13 | * GNU General Public License for more details. | |
14 | */ | |
15 | ||
16 | #include <linux/module.h> | |
17 | #include <linux/acpi.h> | |
18 | #include <linux/mfd/axp20x.h> | |
19 | #include <linux/regmap.h> | |
20 | #include <linux/platform_device.h> | |
21 | #include <linux/iio/consumer.h> | |
22 | #include "intel_pmic.h" | |
23 | ||
24 | #define XPOWER_GPADC_LOW 0x5b | |
25 | ||
26 | static struct pmic_table power_table[] = { | |
27 | { | |
28 | .address = 0x00, | |
29 | .reg = 0x13, | |
30 | .bit = 0x05, | |
31 | }, | |
32 | { | |
33 | .address = 0x04, | |
34 | .reg = 0x13, | |
35 | .bit = 0x06, | |
36 | }, | |
37 | { | |
38 | .address = 0x08, | |
39 | .reg = 0x13, | |
40 | .bit = 0x07, | |
41 | }, | |
42 | { | |
43 | .address = 0x0c, | |
44 | .reg = 0x12, | |
45 | .bit = 0x03, | |
46 | }, | |
47 | { | |
48 | .address = 0x10, | |
49 | .reg = 0x12, | |
50 | .bit = 0x04, | |
51 | }, | |
52 | { | |
53 | .address = 0x14, | |
54 | .reg = 0x12, | |
55 | .bit = 0x05, | |
56 | }, | |
57 | { | |
58 | .address = 0x18, | |
59 | .reg = 0x12, | |
60 | .bit = 0x06, | |
61 | }, | |
62 | { | |
63 | .address = 0x1c, | |
64 | .reg = 0x12, | |
65 | .bit = 0x00, | |
66 | }, | |
67 | { | |
68 | .address = 0x20, | |
69 | .reg = 0x12, | |
70 | .bit = 0x01, | |
71 | }, | |
72 | { | |
73 | .address = 0x24, | |
74 | .reg = 0x12, | |
75 | .bit = 0x02, | |
76 | }, | |
77 | { | |
78 | .address = 0x28, | |
79 | .reg = 0x13, | |
80 | .bit = 0x02, | |
81 | }, | |
82 | { | |
83 | .address = 0x2c, | |
84 | .reg = 0x13, | |
85 | .bit = 0x03, | |
86 | }, | |
87 | { | |
88 | .address = 0x30, | |
89 | .reg = 0x13, | |
90 | .bit = 0x04, | |
91 | }, | |
92 | { | |
93 | .address = 0x38, | |
94 | .reg = 0x10, | |
95 | .bit = 0x03, | |
96 | }, | |
97 | { | |
98 | .address = 0x3c, | |
99 | .reg = 0x10, | |
100 | .bit = 0x06, | |
101 | }, | |
102 | { | |
103 | .address = 0x40, | |
104 | .reg = 0x10, | |
105 | .bit = 0x05, | |
106 | }, | |
107 | { | |
108 | .address = 0x44, | |
109 | .reg = 0x10, | |
110 | .bit = 0x04, | |
111 | }, | |
112 | { | |
113 | .address = 0x48, | |
114 | .reg = 0x10, | |
115 | .bit = 0x01, | |
116 | }, | |
117 | { | |
118 | .address = 0x4c, | |
119 | .reg = 0x10, | |
120 | .bit = 0x00 | |
121 | }, | |
122 | }; | |
123 | ||
124 | /* TMP0 - TMP5 are the same, all from GPADC */ | |
125 | static struct pmic_table thermal_table[] = { | |
126 | { | |
127 | .address = 0x00, | |
128 | .reg = XPOWER_GPADC_LOW | |
129 | }, | |
130 | { | |
131 | .address = 0x0c, | |
132 | .reg = XPOWER_GPADC_LOW | |
133 | }, | |
134 | { | |
135 | .address = 0x18, | |
136 | .reg = XPOWER_GPADC_LOW | |
137 | }, | |
138 | { | |
139 | .address = 0x24, | |
140 | .reg = XPOWER_GPADC_LOW | |
141 | }, | |
142 | { | |
143 | .address = 0x30, | |
144 | .reg = XPOWER_GPADC_LOW | |
145 | }, | |
146 | { | |
147 | .address = 0x3c, | |
148 | .reg = XPOWER_GPADC_LOW | |
149 | }, | |
150 | }; | |
151 | ||
152 | static int intel_xpower_pmic_get_power(struct regmap *regmap, int reg, | |
153 | int bit, u64 *value) | |
154 | { | |
155 | int data; | |
156 | ||
157 | if (regmap_read(regmap, reg, &data)) | |
158 | return -EIO; | |
159 | ||
160 | *value = (data & BIT(bit)) ? 1 : 0; | |
161 | return 0; | |
162 | } | |
163 | ||
164 | static int intel_xpower_pmic_update_power(struct regmap *regmap, int reg, | |
165 | int bit, bool on) | |
166 | { | |
167 | int data; | |
168 | ||
169 | if (regmap_read(regmap, reg, &data)) | |
170 | return -EIO; | |
171 | ||
172 | if (on) | |
173 | data |= BIT(bit); | |
174 | else | |
175 | data &= ~BIT(bit); | |
176 | ||
177 | if (regmap_write(regmap, reg, data)) | |
178 | return -EIO; | |
179 | ||
180 | return 0; | |
181 | } | |
182 | ||
183 | /** | |
184 | * intel_xpower_pmic_get_raw_temp(): Get raw temperature reading from the PMIC | |
185 | * | |
186 | * @regmap: regmap of the PMIC device | |
187 | * @reg: register to get the reading | |
188 | * | |
189 | * We could get the sensor value by manipulating the HW regs here, but since | |
190 | * the axp288 IIO driver may also access the same regs at the same time, the | |
191 | * APIs provided by IIO subsystem are used here instead to avoid problems. As | |
192 | * a result, the two passed in params are of no actual use. | |
193 | * | |
194 | * Return a positive value on success, errno on failure. | |
195 | */ | |
196 | static int intel_xpower_pmic_get_raw_temp(struct regmap *regmap, int reg) | |
197 | { | |
198 | struct iio_channel *gpadc_chan; | |
199 | int ret, val; | |
200 | ||
201 | gpadc_chan = iio_channel_get(NULL, "axp288-system-temp"); | |
202 | if (IS_ERR_OR_NULL(gpadc_chan)) | |
203 | return -EACCES; | |
204 | ||
205 | ret = iio_read_channel_raw(gpadc_chan, &val); | |
206 | if (ret < 0) | |
207 | val = ret; | |
208 | ||
209 | iio_channel_release(gpadc_chan); | |
210 | return val; | |
211 | } | |
212 | ||
213 | static struct intel_pmic_opregion_data intel_xpower_pmic_opregion_data = { | |
214 | .get_power = intel_xpower_pmic_get_power, | |
215 | .update_power = intel_xpower_pmic_update_power, | |
216 | .get_raw_temp = intel_xpower_pmic_get_raw_temp, | |
217 | .power_table = power_table, | |
218 | .power_table_count = ARRAY_SIZE(power_table), | |
219 | .thermal_table = thermal_table, | |
220 | .thermal_table_count = ARRAY_SIZE(thermal_table), | |
221 | }; | |
222 | ||
491cb357 AL |
223 | static acpi_status intel_xpower_pmic_gpio_handler(u32 function, |
224 | acpi_physical_address address, u32 bit_width, u64 *value, | |
225 | void *handler_context, void *region_context) | |
226 | { | |
227 | return AE_OK; | |
228 | } | |
d8139f63 AL |
229 | |
230 | static int intel_xpower_pmic_opregion_probe(struct platform_device *pdev) | |
231 | { | |
491cb357 AL |
232 | struct device *parent = pdev->dev.parent; |
233 | struct axp20x_dev *axp20x = dev_get_drvdata(parent); | |
234 | acpi_status status; | |
235 | int result; | |
236 | ||
237 | status = acpi_install_address_space_handler(ACPI_HANDLE(parent), | |
238 | ACPI_ADR_SPACE_GPIO, intel_xpower_pmic_gpio_handler, | |
239 | NULL, NULL); | |
240 | if (ACPI_FAILURE(status)) | |
241 | return -ENODEV; | |
242 | ||
243 | result = intel_pmic_install_opregion_handler(&pdev->dev, | |
244 | ACPI_HANDLE(parent), axp20x->regmap, | |
245 | &intel_xpower_pmic_opregion_data); | |
246 | if (result) | |
247 | acpi_remove_address_space_handler(ACPI_HANDLE(parent), | |
248 | ACPI_ADR_SPACE_GPIO, | |
249 | intel_xpower_pmic_gpio_handler); | |
250 | ||
251 | return result; | |
d8139f63 AL |
252 | } |
253 | ||
254 | static struct platform_driver intel_xpower_pmic_opregion_driver = { | |
255 | .probe = intel_xpower_pmic_opregion_probe, | |
256 | .driver = { | |
257 | .name = "axp288_pmic_acpi", | |
258 | }, | |
259 | }; | |
260 | ||
261 | static int __init intel_xpower_pmic_opregion_driver_init(void) | |
262 | { | |
263 | return platform_driver_register(&intel_xpower_pmic_opregion_driver); | |
264 | } | |
265 | module_init(intel_xpower_pmic_opregion_driver_init); | |
266 | ||
267 | MODULE_DESCRIPTION("XPower AXP288 ACPI operation region driver"); | |
268 | MODULE_LICENSE("GPL"); |