1 // SPDX-License-Identifier: GPL-2.0
2 /*
3 * XPower AXP288 PMIC operation region driver
4 *
5 * Copyright (C) 2014 Intel Corporation. All rights reserved.
6 */
7
8 #include <linux/acpi.h>
9 #include <linux/init.h>
10 #include <linux/mfd/axp20x.h>
11 #include <linux/regmap.h>
12 #include <linux/platform_device.h>
13 #include <asm/iosf_mbi.h>
14 #include "intel_pmic.h"
15
16 #define XPOWER_GPADC_LOW 0x5b
17 #define XPOWER_GPI1_CTRL 0x92
18
19 #define GPI1_LDO_MASK GENMASK(2, 0)
20 #define GPI1_LDO_ON (3 << 0)
21 #define GPI1_LDO_OFF (4 << 0)
22
23 #define AXP288_ADC_TS_CURRENT_ON_OFF_MASK GENMASK(1, 0)
24 #define AXP288_ADC_TS_CURRENT_OFF (0 << 0)
25 #define AXP288_ADC_TS_CURRENT_ON_WHEN_CHARGING (1 << 0)
26 #define AXP288_ADC_TS_CURRENT_ON_ONDEMAND (2 << 0)
27 #define AXP288_ADC_TS_CURRENT_ON (3 << 0)
28
29 static struct pmic_table power_table[] = {
30 {
31 .address = 0x00,
32 .reg = 0x13,
33 .bit = 0x05,
34 }, /* ALD1 */
35 {
36 .address = 0x04,
37 .reg = 0x13,
38 .bit = 0x06,
39 }, /* ALD2 */
40 {
41 .address = 0x08,
42 .reg = 0x13,
43 .bit = 0x07,
44 }, /* ALD3 */
45 {
46 .address = 0x0c,
47 .reg = 0x12,
48 .bit = 0x03,
49 }, /* DLD1 */
50 {
51 .address = 0x10,
52 .reg = 0x12,
53 .bit = 0x04,
54 }, /* DLD2 */
55 {
56 .address = 0x14,
57 .reg = 0x12,
58 .bit = 0x05,
59 }, /* DLD3 */
60 {
61 .address = 0x18,
62 .reg = 0x12,
63 .bit = 0x06,
64 }, /* DLD4 */
65 {
66 .address = 0x1c,
67 .reg = 0x12,
68 .bit = 0x00,
69 }, /* ELD1 */
70 {
71 .address = 0x20,
72 .reg = 0x12,
73 .bit = 0x01,
74 }, /* ELD2 */
75 {
76 .address = 0x24,
77 .reg = 0x12,
78 .bit = 0x02,
79 }, /* ELD3 */
80 {
81 .address = 0x28,
82 .reg = 0x13,
83 .bit = 0x02,
84 }, /* FLD1 */
85 {
86 .address = 0x2c,
87 .reg = 0x13,
88 .bit = 0x03,
89 }, /* FLD2 */
90 {
91 .address = 0x30,
92 .reg = 0x13,
93 .bit = 0x04,
94 }, /* FLD3 */
95 {
96 .address = 0x34,
97 .reg = 0x10,
98 .bit = 0x03,
99 }, /* BUC1 */
100 {
101 .address = 0x38,
102 .reg = 0x10,
103 .bit = 0x06,
104 }, /* BUC2 */
105 {
106 .address = 0x3c,
107 .reg = 0x10,
108 .bit = 0x05,
109 }, /* BUC3 */
110 {
111 .address = 0x40,
112 .reg = 0x10,
113 .bit = 0x04,
114 }, /* BUC4 */
115 {
116 .address = 0x44,
117 .reg = 0x10,
118 .bit = 0x01,
119 }, /* BUC5 */
120 {
121 .address = 0x48,
122 .reg = 0x10,
123 .bit = 0x00
124 }, /* BUC6 */
125 {
126 .address = 0x4c,
127 .reg = 0x92,
128 }, /* GPI1 */
129 };
130
131 /* TMP0 - TMP5 are the same, all from GPADC */
132 static struct pmic_table thermal_table[] = {
133 {
134 .address = 0x00,
135 .reg = XPOWER_GPADC_LOW
136 },
137 {
138 .address = 0x0c,
139 .reg = XPOWER_GPADC_LOW
140 },
141 {
142 .address = 0x18,
143 .reg = XPOWER_GPADC_LOW
144 },
145 {
146 .address = 0x24,
147 .reg = XPOWER_GPADC_LOW
148 },
149 {
150 .address = 0x30,
151 .reg = XPOWER_GPADC_LOW
152 },
153 {
154 .address = 0x3c,
155 .reg = XPOWER_GPADC_LOW
156 },
157 };
158
intel_xpower_pmic_get_power(struct regmap * regmap,int reg,int bit,u64 * value)159 static int intel_xpower_pmic_get_power(struct regmap *regmap, int reg,
160 int bit, u64 *value)
161 {
162 int data;
163
164 if (regmap_read(regmap, reg, &data))
165 return -EIO;
166
167 /* GPIO1 LDO regulator needs special handling */
168 if (reg == XPOWER_GPI1_CTRL)
169 *value = ((data & GPI1_LDO_MASK) == GPI1_LDO_ON);
170 else
171 *value = (data & BIT(bit)) ? 1 : 0;
172
173 return 0;
174 }
175
intel_xpower_pmic_update_power(struct regmap * regmap,int reg,int bit,bool on)176 static int intel_xpower_pmic_update_power(struct regmap *regmap, int reg,
177 int bit, bool on)
178 {
179 int data, ret;
180
181 /* GPIO1 LDO regulator needs special handling */
182 if (reg == XPOWER_GPI1_CTRL)
183 return regmap_update_bits(regmap, reg, GPI1_LDO_MASK,
184 on ? GPI1_LDO_ON : GPI1_LDO_OFF);
185
186 ret = iosf_mbi_block_punit_i2c_access();
187 if (ret)
188 return ret;
189
190 if (regmap_read(regmap, reg, &data)) {
191 ret = -EIO;
192 goto out;
193 }
194
195 if (on)
196 data |= BIT(bit);
197 else
198 data &= ~BIT(bit);
199
200 if (regmap_write(regmap, reg, data))
201 ret = -EIO;
202 out:
203 iosf_mbi_unblock_punit_i2c_access();
204
205 return ret;
206 }
207
208 /**
209 * intel_xpower_pmic_get_raw_temp(): Get raw temperature reading from the PMIC
210 *
211 * @regmap: regmap of the PMIC device
212 * @reg: register to get the reading
213 *
214 * Return a positive value on success, errno on failure.
215 */
intel_xpower_pmic_get_raw_temp(struct regmap * regmap,int reg)216 static int intel_xpower_pmic_get_raw_temp(struct regmap *regmap, int reg)
217 {
218 int ret, adc_ts_pin_ctrl;
219 u8 buf[2];
220
221 /*
222 * The current-source used for the battery temp-sensor (TS) is shared
223 * with the GPADC. For proper fuel-gauge and charger operation the TS
224 * current-source needs to be permanently on. But to read the GPADC we
225 * need to temporary switch the TS current-source to ondemand, so that
226 * the GPADC can use it, otherwise we will always read an all 0 value.
227 *
228 * Note that the switching from on to on-ondemand is not necessary
229 * when the TS current-source is off (this happens on devices which
230 * do not use the TS-pin).
231 */
232 ret = regmap_read(regmap, AXP288_ADC_TS_PIN_CTRL, &adc_ts_pin_ctrl);
233 if (ret)
234 return ret;
235
236 if (adc_ts_pin_ctrl & AXP288_ADC_TS_CURRENT_ON_OFF_MASK) {
237 ret = regmap_update_bits(regmap, AXP288_ADC_TS_PIN_CTRL,
238 AXP288_ADC_TS_CURRENT_ON_OFF_MASK,
239 AXP288_ADC_TS_CURRENT_ON_ONDEMAND);
240 if (ret)
241 return ret;
242
243 /* Wait a bit after switching the current-source */
244 usleep_range(6000, 10000);
245 }
246
247 ret = regmap_bulk_read(regmap, AXP288_GP_ADC_H, buf, 2);
248 if (ret == 0)
249 ret = (buf[0] << 4) + ((buf[1] >> 4) & 0x0f);
250
251 if (adc_ts_pin_ctrl & AXP288_ADC_TS_CURRENT_ON_OFF_MASK) {
252 regmap_update_bits(regmap, AXP288_ADC_TS_PIN_CTRL,
253 AXP288_ADC_TS_CURRENT_ON_OFF_MASK,
254 AXP288_ADC_TS_CURRENT_ON);
255 }
256
257 return ret;
258 }
259
260 static struct intel_pmic_opregion_data intel_xpower_pmic_opregion_data = {
261 .get_power = intel_xpower_pmic_get_power,
262 .update_power = intel_xpower_pmic_update_power,
263 .get_raw_temp = intel_xpower_pmic_get_raw_temp,
264 .power_table = power_table,
265 .power_table_count = ARRAY_SIZE(power_table),
266 .thermal_table = thermal_table,
267 .thermal_table_count = ARRAY_SIZE(thermal_table),
268 .pmic_i2c_address = 0x34,
269 };
270
intel_xpower_pmic_gpio_handler(u32 function,acpi_physical_address address,u32 bit_width,u64 * value,void * handler_context,void * region_context)271 static acpi_status intel_xpower_pmic_gpio_handler(u32 function,
272 acpi_physical_address address, u32 bit_width, u64 *value,
273 void *handler_context, void *region_context)
274 {
275 return AE_OK;
276 }
277
intel_xpower_pmic_opregion_probe(struct platform_device * pdev)278 static int intel_xpower_pmic_opregion_probe(struct platform_device *pdev)
279 {
280 struct device *parent = pdev->dev.parent;
281 struct axp20x_dev *axp20x = dev_get_drvdata(parent);
282 acpi_status status;
283 int result;
284
285 status = acpi_install_address_space_handler(ACPI_HANDLE(parent),
286 ACPI_ADR_SPACE_GPIO, intel_xpower_pmic_gpio_handler,
287 NULL, NULL);
288 if (ACPI_FAILURE(status))
289 return -ENODEV;
290
291 result = intel_pmic_install_opregion_handler(&pdev->dev,
292 ACPI_HANDLE(parent), axp20x->regmap,
293 &intel_xpower_pmic_opregion_data);
294 if (result)
295 acpi_remove_address_space_handler(ACPI_HANDLE(parent),
296 ACPI_ADR_SPACE_GPIO,
297 intel_xpower_pmic_gpio_handler);
298
299 return result;
300 }
301
302 static struct platform_driver intel_xpower_pmic_opregion_driver = {
303 .probe = intel_xpower_pmic_opregion_probe,
304 .driver = {
305 .name = "axp288_pmic_acpi",
306 },
307 };
308 builtin_platform_driver(intel_xpower_pmic_opregion_driver);
309