aboutsummaryrefslogtreecommitdiffstats
path: root/drivers/acpi/pmic/intel_pmic_xpower.c
blob: 316e55174aa970093fb0d26083dc2b3fb0acf408 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
/*
 * intel_pmic_xpower.c - XPower AXP288 PMIC operation region driver
 *
 * Copyright (C) 2014 Intel Corporation. All rights reserved.
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License version
 * 2 as published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 */

#include <linux/init.h>
#include <linux/acpi.h>
#include <linux/mfd/axp20x.h>
#include <linux/regmap.h>
#include <linux/platform_device.h>
#include "intel_pmic.h"

#define XPOWER_GPADC_LOW	0x5b
#define XPOWER_GPI1_CTRL	0x92

#define GPI1_LDO_MASK		GENMASK(2, 0)
#define GPI1_LDO_ON		(3 << 0)
#define GPI1_LDO_OFF		(4 << 0)

#define AXP288_ADC_TS_PIN_GPADC	0xf2
#define AXP288_ADC_TS_PIN_ON	0xf3

static struct pmic_table power_table[] = {
	{
		.address = 0x00,
		.reg = 0x13,
		.bit = 0x05,
	}, /* ALD1 */
	{
		.address = 0x04,
		.reg = 0x13,
		.bit = 0x06,
	}, /* ALD2 */
	{
		.address = 0x08,
		.reg = 0x13,
		.bit = 0x07,
	}, /* ALD3 */
	{
		.address = 0x0c,
		.reg = 0x12,
		.bit = 0x03,
	}, /* DLD1 */
	{
		.address = 0x10,
		.reg = 0x12,
		.bit = 0x04,
	}, /* DLD2 */
	{
		.address = 0x14,
		.reg = 0x12,
		.bit = 0x05,
	}, /* DLD3 */
	{
		.address = 0x18,
		.reg = 0x12,
		.bit = 0x06,
	}, /* DLD4 */
	{
		.address = 0x1c,
		.reg = 0x12,
		.bit = 0x00,
	}, /* ELD1 */
	{
		.address = 0x20,
		.reg = 0x12,
		.bit = 0x01,
	}, /* ELD2 */
	{
		.address = 0x24,
		.reg = 0x12,
		.bit = 0x02,
	}, /* ELD3 */
	{
		.address = 0x28,
		.reg = 0x13,
		.bit = 0x02,
	}, /* FLD1 */
	{
		.address = 0x2c,
		.reg = 0x13,
		.bit = 0x03,
	}, /* FLD2 */
	{
		.address = 0x30,
		.reg = 0x13,
		.bit = 0x04,
	}, /* FLD3 */
	{
		.address = 0x34,
		.reg = 0x10,
		.bit = 0x03,
	}, /* BUC1 */
	{
		.address = 0x38,
		.reg = 0x10,
		.bit = 0x06,
	}, /* BUC2 */
	{
		.address = 0x3c,
		.reg = 0x10,
		.bit = 0x05,
	}, /* BUC3 */
	{
		.address = 0x40,
		.reg = 0x10,
		.bit = 0x04,
	}, /* BUC4 */
	{
		.address = 0x44,
		.reg = 0x10,
		.bit = 0x01,
	}, /* BUC5 */
	{
		.address = 0x48,
		.reg = 0x10,
		.bit = 0x00
	}, /* BUC6 */
	{
		.address = 0x4c,
		.reg = 0x92,
	}, /* GPI1 */
};

/* TMP0 - TMP5 are the same, all from GPADC */
static struct pmic_table thermal_table[] = {
	{
		.address = 0x00,
		.reg = XPOWER_GPADC_LOW
	},
	{
		.address = 0x0c,
		.reg = XPOWER_GPADC_LOW
	},
	{
		.address = 0x18,
		.reg = XPOWER_GPADC_LOW
	},
	{
		.address = 0x24,
		.reg = XPOWER_GPADC_LOW
	},
	{
		.address = 0x30,
		.reg = XPOWER_GPADC_LOW
	},
	{
		.address = 0x3c,
		.reg = XPOWER_GPADC_LOW
	},
};

static int intel_xpower_pmic_get_power(struct regmap *regmap, int reg,
				       int bit, u64 *value)
{
	int data;

	if (regmap_read(regmap, reg, &data))
		return -EIO;

	/* GPIO1 LDO regulator needs special handling */
	if (reg == XPOWER_GPI1_CTRL)
		*value = ((data & GPI1_LDO_MASK) == GPI1_LDO_ON);
	else
		*value = (data & BIT(bit)) ? 1 : 0;

	return 0;
}

static int intel_xpower_pmic_update_power(struct regmap *regmap, int reg,
					  int bit, bool on)
{
	int data;

	/* GPIO1 LDO regulator needs special handling */
	if (reg == XPOWER_GPI1_CTRL)
		return regmap_update_bits(regmap, reg, GPI1_LDO_MASK,
					  on ? GPI1_LDO_ON : GPI1_LDO_OFF);

	if (regmap_read(regmap, reg, &data))
		return -EIO;

	if (on)
		data |= BIT(bit);
	else
		data &= ~BIT(bit);

	if (regmap_write(regmap, reg, data))
		return -EIO;

	return 0;
}

/**
 * intel_xpower_pmic_get_raw_temp(): Get raw temperature reading from the PMIC
 *
 * @regmap: regmap of the PMIC device
 * @reg: register to get the reading
 *
 * Return a positive value on success, errno on failure.
 */
static int intel_xpower_pmic_get_raw_temp(struct regmap *regmap, int reg)
{
	u8 buf[2];
	int ret;

	ret = regmap_write(regmap, AXP288_ADC_TS_PIN_CTRL,
			   AXP288_ADC_TS_PIN_GPADC);
	if (ret)
		return ret;

	/* After switching to the GPADC pin give things some time to settle */
	usleep_range(6000, 10000);

	ret = regmap_bulk_read(regmap, AXP288_GP_ADC_H, buf, 2);
	if (ret == 0)
		ret = (buf[0] << 4) + ((buf[1] >> 4) & 0x0f);

	regmap_write(regmap, AXP288_ADC_TS_PIN_CTRL, AXP288_ADC_TS_PIN_ON);

	return ret;
}

static struct intel_pmic_opregion_data intel_xpower_pmic_opregion_data = {
	.get_power = intel_xpower_pmic_get_power,
	.update_power = intel_xpower_pmic_update_power,
	.get_raw_temp = intel_xpower_pmic_get_raw_temp,
	.power_table = power_table,
	.power_table_count = ARRAY_SIZE(power_table),
	.thermal_table = thermal_table,
	.thermal_table_count = ARRAY_SIZE(thermal_table),
};

static acpi_status intel_xpower_pmic_gpio_handler(u32 function,
		acpi_physical_address address, u32 bit_width, u64 *value,
		void *handler_context, void *region_context)
{
	return AE_OK;
}

static int intel_xpower_pmic_opregion_probe(struct platform_device *pdev)
{
	struct device *parent = pdev->dev.parent;
	struct axp20x_dev *axp20x = dev_get_drvdata(parent);
	acpi_status status;
	int result;

	status = acpi_install_address_space_handler(ACPI_HANDLE(parent),
			ACPI_ADR_SPACE_GPIO, intel_xpower_pmic_gpio_handler,
			NULL, NULL);
	if (ACPI_FAILURE(status))
		return -ENODEV;

	result = intel_pmic_install_opregion_handler(&pdev->dev,
					ACPI_HANDLE(parent), axp20x->regmap,
					&intel_xpower_pmic_opregion_data);
	if (result)
		acpi_remove_address_space_handler(ACPI_HANDLE(parent),
						  ACPI_ADR_SPACE_GPIO,
						  intel_xpower_pmic_gpio_handler);

	return result;
}

static struct platform_driver intel_xpower_pmic_opregion_driver = {
	.probe = intel_xpower_pmic_opregion_probe,
	.driver = {
		.name = "axp288_pmic_acpi",
	},
};
builtin_platform_driver(intel_xpower_pmic_opregion_driver);

Privacy Policy