1 // SPDX-License-Identifier: GPL-2.0
3 * XPower AXP288 PMIC operation region driver
5 * Copyright (C) 2014 Intel Corporation. All rights reserved.
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"
16 #define XPOWER_GPADC_LOW 0x5b
17 #define XPOWER_GPI1_CTRL 0x92
19 #define GPI1_LDO_MASK GENMASK(2, 0)
20 #define GPI1_LDO_ON (3 << 0)
21 #define GPI1_LDO_OFF (4 << 0)
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)
29 static struct pmic_table power_table[] = {
131 /* TMP0 - TMP5 are the same, all from GPADC */
132 static struct pmic_table thermal_table[] = {
135 .reg = XPOWER_GPADC_LOW
139 .reg = XPOWER_GPADC_LOW
143 .reg = XPOWER_GPADC_LOW
147 .reg = XPOWER_GPADC_LOW
151 .reg = XPOWER_GPADC_LOW
155 .reg = XPOWER_GPADC_LOW
159 static int intel_xpower_pmic_get_power(struct regmap *regmap, int reg,
164 if (regmap_read(regmap, reg, &data))
167 /* GPIO1 LDO regulator needs special handling */
168 if (reg == XPOWER_GPI1_CTRL)
169 *value = ((data & GPI1_LDO_MASK) == GPI1_LDO_ON);
171 *value = (data & BIT(bit)) ? 1 : 0;
176 static int intel_xpower_pmic_update_power(struct regmap *regmap, int reg,
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);
186 ret = iosf_mbi_block_punit_i2c_access();
190 if (regmap_read(regmap, reg, &data)) {
200 if (regmap_write(regmap, reg, data))
203 iosf_mbi_unblock_punit_i2c_access();
209 * intel_xpower_pmic_get_raw_temp(): Get raw temperature reading from the PMIC
211 * @regmap: regmap of the PMIC device
212 * @reg: register to get the reading
214 * Return a positive value on success, errno on failure.
216 static int intel_xpower_pmic_get_raw_temp(struct regmap *regmap, int reg)
218 int ret, adc_ts_pin_ctrl;
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.
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).
232 ret = regmap_read(regmap, AXP288_ADC_TS_PIN_CTRL, &adc_ts_pin_ctrl);
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);
243 /* Wait a bit after switching the current-source */
244 usleep_range(6000, 10000);
247 ret = regmap_bulk_read(regmap, AXP288_GP_ADC_H, buf, 2);
249 ret = (buf[0] << 4) + ((buf[1] >> 4) & 0x0f);
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);
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,
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)
278 static int intel_xpower_pmic_opregion_probe(struct platform_device *pdev)
280 struct device *parent = pdev->dev.parent;
281 struct axp20x_dev *axp20x = dev_get_drvdata(parent);
285 status = acpi_install_address_space_handler(ACPI_HANDLE(parent),
286 ACPI_ADR_SPACE_GPIO, intel_xpower_pmic_gpio_handler,
288 if (ACPI_FAILURE(status))
291 result = intel_pmic_install_opregion_handler(&pdev->dev,
292 ACPI_HANDLE(parent), axp20x->regmap,
293 &intel_xpower_pmic_opregion_data);
295 acpi_remove_address_space_handler(ACPI_HANDLE(parent),
297 intel_xpower_pmic_gpio_handler);
302 static struct platform_driver intel_xpower_pmic_opregion_driver = {
303 .probe = intel_xpower_pmic_opregion_probe,
305 .name = "axp288_pmic_acpi",
308 builtin_platform_driver(intel_xpower_pmic_opregion_driver);