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/platform_device.h>
12 #include <linux/regmap.h>
13 #include "intel_pmic.h"
15 #define XPOWER_GPADC_LOW 0x5b
16 #define XPOWER_GPI1_CTRL 0x92
18 #define GPI1_LDO_MASK GENMASK(2, 0)
19 #define GPI1_LDO_ON (3 << 0)
20 #define GPI1_LDO_OFF (4 << 0)
22 #define AXP288_ADC_TS_PIN_GPADC 0xf2
23 #define AXP288_ADC_TS_PIN_ON 0xf3
25 static struct pmic_table power_table[] = {
127 /* TMP0 - TMP5 are the same, all from GPADC */
128 static struct pmic_table thermal_table[] = {
131 .reg = XPOWER_GPADC_LOW
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 static int intel_xpower_pmic_get_power(struct regmap *regmap, int reg,
160 if (regmap_read(regmap, reg, &data))
163 /* GPIO1 LDO regulator needs special handling */
164 if (reg == XPOWER_GPI1_CTRL)
165 *value = ((data & GPI1_LDO_MASK) == GPI1_LDO_ON);
167 *value = (data & BIT(bit)) ? 1 : 0;
172 static int intel_xpower_pmic_update_power(struct regmap *regmap, int reg,
177 /* GPIO1 LDO regulator needs special handling */
178 if (reg == XPOWER_GPI1_CTRL)
179 return regmap_update_bits(regmap, reg, GPI1_LDO_MASK,
180 on ? GPI1_LDO_ON : GPI1_LDO_OFF);
182 if (regmap_read(regmap, reg, &data))
190 if (regmap_write(regmap, reg, data))
197 * intel_xpower_pmic_get_raw_temp(): Get raw temperature reading from the PMIC
199 * @regmap: regmap of the PMIC device
200 * @reg: register to get the reading
202 * Return a positive value on success, errno on failure.
204 static int intel_xpower_pmic_get_raw_temp(struct regmap *regmap, int reg)
209 ret = regmap_write(regmap, AXP288_ADC_TS_PIN_CTRL,
210 AXP288_ADC_TS_PIN_GPADC);
214 /* After switching to the GPADC pin give things some time to settle */
215 usleep_range(6000, 10000);
217 ret = regmap_bulk_read(regmap, AXP288_GP_ADC_H, buf, 2);
219 ret = (buf[0] << 4) + ((buf[1] >> 4) & 0x0f);
221 regmap_write(regmap, AXP288_ADC_TS_PIN_CTRL, AXP288_ADC_TS_PIN_ON);
226 static struct intel_pmic_opregion_data intel_xpower_pmic_opregion_data = {
227 .get_power = intel_xpower_pmic_get_power,
228 .update_power = intel_xpower_pmic_update_power,
229 .get_raw_temp = intel_xpower_pmic_get_raw_temp,
230 .power_table = power_table,
231 .power_table_count = ARRAY_SIZE(power_table),
232 .thermal_table = thermal_table,
233 .thermal_table_count = ARRAY_SIZE(thermal_table),
236 static acpi_status intel_xpower_pmic_gpio_handler(u32 function,
237 acpi_physical_address address, u32 bit_width, u64 *value,
238 void *handler_context, void *region_context)
243 static int intel_xpower_pmic_opregion_probe(struct platform_device *pdev)
245 struct device *parent = pdev->dev.parent;
246 struct axp20x_dev *axp20x = dev_get_drvdata(parent);
250 status = acpi_install_address_space_handler(ACPI_HANDLE(parent),
251 ACPI_ADR_SPACE_GPIO, intel_xpower_pmic_gpio_handler,
253 if (ACPI_FAILURE(status))
256 result = intel_pmic_install_opregion_handler(&pdev->dev,
257 ACPI_HANDLE(parent), axp20x->regmap,
258 &intel_xpower_pmic_opregion_data);
260 acpi_remove_address_space_handler(ACPI_HANDLE(parent),
262 intel_xpower_pmic_gpio_handler);
267 static struct platform_driver intel_xpower_pmic_opregion_driver = {
268 .probe = intel_xpower_pmic_opregion_probe,
270 .name = "axp288_pmic_acpi",
273 builtin_platform_driver(intel_xpower_pmic_opregion_driver);