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/init.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 "intel_pmic.h"
22
23 #define XPOWER_GPADC_LOW 0x5b
24 #define XPOWER_GPI1_CTRL 0x92
25
26 #define GPI1_LDO_MASK GENMASK(2, 0)
27 #define GPI1_LDO_ON (3 << 0)
28 #define GPI1_LDO_OFF (4 << 0)
29
30 #define AXP288_ADC_TS_PIN_GPADC 0xf2
31 #define AXP288_ADC_TS_PIN_ON 0xf3
32
33 static struct pmic_table power_table[] = {
34 {
35 .address = 0x00,
36 .reg = 0x13,
37 .bit = 0x05,
38 }, /* ALD1 */
39 {
40 .address = 0x04,
41 .reg = 0x13,
42 .bit = 0x06,
43 }, /* ALD2 */
44 {
45 .address = 0x08,
46 .reg = 0x13,
47 .bit = 0x07,
48 }, /* ALD3 */
49 {
50 .address = 0x0c,
51 .reg = 0x12,
52 .bit = 0x03,
53 }, /* DLD1 */
54 {
55 .address = 0x10,
56 .reg = 0x12,
57 .bit = 0x04,
58 }, /* DLD2 */
59 {
60 .address = 0x14,
61 .reg = 0x12,
62 .bit = 0x05,
63 }, /* DLD3 */
64 {
65 .address = 0x18,
66 .reg = 0x12,
67 .bit = 0x06,
68 }, /* DLD4 */
69 {
70 .address = 0x1c,
71 .reg = 0x12,
72 .bit = 0x00,
73 }, /* ELD1 */
74 {
75 .address = 0x20,
76 .reg = 0x12,
77 .bit = 0x01,
78 }, /* ELD2 */
79 {
80 .address = 0x24,
81 .reg = 0x12,
82 .bit = 0x02,
83 }, /* ELD3 */
84 {
85 .address = 0x28,
86 .reg = 0x13,
87 .bit = 0x02,
88 }, /* FLD1 */
89 {
90 .address = 0x2c,
91 .reg = 0x13,
92 .bit = 0x03,
93 }, /* FLD2 */
94 {
95 .address = 0x30,
96 .reg = 0x13,
97 .bit = 0x04,
98 }, /* FLD3 */
99 {
100 .address = 0x34,
101 .reg = 0x10,
102 .bit = 0x03,
103 }, /* BUC1 */
104 {
105 .address = 0x38,
106 .reg = 0x10,
107 .bit = 0x06,
108 }, /* BUC2 */
109 {
110 .address = 0x3c,
111 .reg = 0x10,
112 .bit = 0x05,
113 }, /* BUC3 */
114 {
115 .address = 0x40,
116 .reg = 0x10,
117 .bit = 0x04,
118 }, /* BUC4 */
119 {
120 .address = 0x44,
121 .reg = 0x10,
122 .bit = 0x01,
123 }, /* BUC5 */
124 {
125 .address = 0x48,
126 .reg = 0x10,
127 .bit = 0x00
128 }, /* BUC6 */
129 {
130 .address = 0x4c,
131 .reg = 0x92,
132 }, /* GPI1 */
133 };
134
135 /* TMP0 - TMP5 are the same, all from GPADC */
136 static struct pmic_table thermal_table[] = {
137 {
138 .address = 0x00,
139 .reg = XPOWER_GPADC_LOW
140 },
141 {
142 .address = 0x0c,
143 .reg = XPOWER_GPADC_LOW
144 },
145 {
146 .address = 0x18,
147 .reg = XPOWER_GPADC_LOW
148 },
149 {
150 .address = 0x24,
151 .reg = XPOWER_GPADC_LOW
152 },
153 {
154 .address = 0x30,
155 .reg = XPOWER_GPADC_LOW
156 },
157 {
158 .address = 0x3c,
159 .reg = XPOWER_GPADC_LOW
160 },
161 };
162
intel_xpower_pmic_get_power(struct regmap * regmap,int reg,int bit,u64 * value)163 static int intel_xpower_pmic_get_power(struct regmap *regmap, int reg,
164 int bit, u64 *value)
165 {
166 int data;
167
168 if (regmap_read(regmap, reg, &data))
169 return -EIO;
170
171 /* GPIO1 LDO regulator needs special handling */
172 if (reg == XPOWER_GPI1_CTRL)
173 *value = ((data & GPI1_LDO_MASK) == GPI1_LDO_ON);
174 else
175 *value = (data & BIT(bit)) ? 1 : 0;
176
177 return 0;
178 }
179
intel_xpower_pmic_update_power(struct regmap * regmap,int reg,int bit,bool on)180 static int intel_xpower_pmic_update_power(struct regmap *regmap, int reg,
181 int bit, bool on)
182 {
183 int data;
184
185 /* GPIO1 LDO regulator needs special handling */
186 if (reg == XPOWER_GPI1_CTRL)
187 return regmap_update_bits(regmap, reg, GPI1_LDO_MASK,
188 on ? GPI1_LDO_ON : GPI1_LDO_OFF);
189
190 if (regmap_read(regmap, reg, &data))
191 return -EIO;
192
193 if (on)
194 data |= BIT(bit);
195 else
196 data &= ~BIT(bit);
197
198 if (regmap_write(regmap, reg, data))
199 return -EIO;
200
201 return 0;
202 }
203
204 /**
205 * intel_xpower_pmic_get_raw_temp(): Get raw temperature reading from the PMIC
206 *
207 * @regmap: regmap of the PMIC device
208 * @reg: register to get the reading
209 *
210 * Return a positive value on success, errno on failure.
211 */
intel_xpower_pmic_get_raw_temp(struct regmap * regmap,int reg)212 static int intel_xpower_pmic_get_raw_temp(struct regmap *regmap, int reg)
213 {
214 u8 buf[2];
215 int ret;
216
217 ret = regmap_write(regmap, AXP288_ADC_TS_PIN_CTRL,
218 AXP288_ADC_TS_PIN_GPADC);
219 if (ret)
220 return ret;
221
222 /* After switching to the GPADC pin give things some time to settle */
223 usleep_range(6000, 10000);
224
225 ret = regmap_bulk_read(regmap, AXP288_GP_ADC_H, buf, 2);
226 if (ret == 0)
227 ret = (buf[0] << 4) + ((buf[1] >> 4) & 0x0f);
228
229 regmap_write(regmap, AXP288_ADC_TS_PIN_CTRL, AXP288_ADC_TS_PIN_ON);
230
231 return ret;
232 }
233
234 static struct intel_pmic_opregion_data intel_xpower_pmic_opregion_data = {
235 .get_power = intel_xpower_pmic_get_power,
236 .update_power = intel_xpower_pmic_update_power,
237 .get_raw_temp = intel_xpower_pmic_get_raw_temp,
238 .power_table = power_table,
239 .power_table_count = ARRAY_SIZE(power_table),
240 .thermal_table = thermal_table,
241 .thermal_table_count = ARRAY_SIZE(thermal_table),
242 };
243
intel_xpower_pmic_gpio_handler(u32 function,acpi_physical_address address,u32 bit_width,u64 * value,void * handler_context,void * region_context)244 static acpi_status intel_xpower_pmic_gpio_handler(u32 function,
245 acpi_physical_address address, u32 bit_width, u64 *value,
246 void *handler_context, void *region_context)
247 {
248 return AE_OK;
249 }
250
intel_xpower_pmic_opregion_probe(struct platform_device * pdev)251 static int intel_xpower_pmic_opregion_probe(struct platform_device *pdev)
252 {
253 struct device *parent = pdev->dev.parent;
254 struct axp20x_dev *axp20x = dev_get_drvdata(parent);
255 acpi_status status;
256 int result;
257
258 status = acpi_install_address_space_handler(ACPI_HANDLE(parent),
259 ACPI_ADR_SPACE_GPIO, intel_xpower_pmic_gpio_handler,
260 NULL, NULL);
261 if (ACPI_FAILURE(status))
262 return -ENODEV;
263
264 result = intel_pmic_install_opregion_handler(&pdev->dev,
265 ACPI_HANDLE(parent), axp20x->regmap,
266 &intel_xpower_pmic_opregion_data);
267 if (result)
268 acpi_remove_address_space_handler(ACPI_HANDLE(parent),
269 ACPI_ADR_SPACE_GPIO,
270 intel_xpower_pmic_gpio_handler);
271
272 return result;
273 }
274
275 static struct platform_driver intel_xpower_pmic_opregion_driver = {
276 .probe = intel_xpower_pmic_opregion_probe,
277 .driver = {
278 .name = "axp288_pmic_acpi",
279 },
280 };
281 builtin_platform_driver(intel_xpower_pmic_opregion_driver);
282
