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 ret = iosf_mbi_block_punit_i2c_access();
185 /* GPIO1 LDO regulator needs special handling */
186 if (reg == XPOWER_GPI1_CTRL) {
187 ret = regmap_update_bits(regmap, reg, GPI1_LDO_MASK,
188 on ? GPI1_LDO_ON : GPI1_LDO_OFF);
192 if (regmap_read(regmap, reg, &data)) {
202 if (regmap_write(regmap, reg, data))
205 iosf_mbi_unblock_punit_i2c_access();
211 * intel_xpower_pmic_get_raw_temp(): Get raw temperature reading from the PMIC
213 * @regmap: regmap of the PMIC device
214 * @reg: register to get the reading
216 * Return a positive value on success, errno on failure.
218 static int intel_xpower_pmic_get_raw_temp(struct regmap *regmap, int reg)
220 int ret, adc_ts_pin_ctrl;
224 * The current-source used for the battery temp-sensor (TS) is shared
225 * with the GPADC. For proper fuel-gauge and charger operation the TS
226 * current-source needs to be permanently on. But to read the GPADC we
227 * need to temporary switch the TS current-source to ondemand, so that
228 * the GPADC can use it, otherwise we will always read an all 0 value.
230 * Note that the switching from on to on-ondemand is not necessary
231 * when the TS current-source is off (this happens on devices which
232 * do not use the TS-pin).
234 ret = regmap_read(regmap, AXP288_ADC_TS_PIN_CTRL, &adc_ts_pin_ctrl);
238 if (adc_ts_pin_ctrl & AXP288_ADC_TS_CURRENT_ON_OFF_MASK) {
240 * AXP288_ADC_TS_PIN_CTRL reads are cached by the regmap, so
241 * this does to a single I2C-transfer, and thus there is no
242 * need to explicitly call iosf_mbi_block_punit_i2c_access().
244 ret = regmap_update_bits(regmap, AXP288_ADC_TS_PIN_CTRL,
245 AXP288_ADC_TS_CURRENT_ON_OFF_MASK,
246 AXP288_ADC_TS_CURRENT_ON_ONDEMAND);
250 /* Wait a bit after switching the current-source */
251 usleep_range(6000, 10000);
254 ret = iosf_mbi_block_punit_i2c_access();
258 ret = regmap_bulk_read(regmap, AXP288_GP_ADC_H, buf, 2);
260 ret = (buf[0] << 4) + ((buf[1] >> 4) & 0x0f);
262 if (adc_ts_pin_ctrl & AXP288_ADC_TS_CURRENT_ON_OFF_MASK) {
263 regmap_update_bits(regmap, AXP288_ADC_TS_PIN_CTRL,
264 AXP288_ADC_TS_CURRENT_ON_OFF_MASK,
265 AXP288_ADC_TS_CURRENT_ON);
268 iosf_mbi_unblock_punit_i2c_access();
273 static int intel_xpower_exec_mipi_pmic_seq_element(struct regmap *regmap,
274 u16 i2c_address, u32 reg_address,
279 if (i2c_address != 0x34) {
280 pr_err("%s: Unexpected i2c-addr: 0x%02x (reg-addr 0x%x value 0x%x mask 0x%x)\n",
281 __func__, i2c_address, reg_address, value, mask);
285 ret = iosf_mbi_block_punit_i2c_access();
289 ret = regmap_update_bits(regmap, reg_address, mask, value);
291 iosf_mbi_unblock_punit_i2c_access();
296 static int intel_xpower_lpat_raw_to_temp(struct acpi_lpat_conversion_table *lpat_table,
299 struct acpi_lpat first = lpat_table->lpat[0];
300 struct acpi_lpat last = lpat_table->lpat[lpat_table->lpat_count - 1];
303 * Some LPAT tables in the ACPI Device for the AXP288 PMIC for some
304 * reason only describe a small temperature range, e.g. 27° - 37°
305 * Celcius. Resulting in errors when the tablet is idle in a cool room.
307 * To avoid these errors clamp the raw value to be inside the LPAT.
309 if (first.raw < last.raw)
310 raw = clamp(raw, first.raw, last.raw);
312 raw = clamp(raw, last.raw, first.raw);
314 return acpi_lpat_raw_to_temp(lpat_table, raw);
317 static const struct intel_pmic_opregion_data intel_xpower_pmic_opregion_data = {
318 .get_power = intel_xpower_pmic_get_power,
319 .update_power = intel_xpower_pmic_update_power,
320 .get_raw_temp = intel_xpower_pmic_get_raw_temp,
321 .exec_mipi_pmic_seq_element = intel_xpower_exec_mipi_pmic_seq_element,
322 .lpat_raw_to_temp = intel_xpower_lpat_raw_to_temp,
323 .power_table = power_table,
324 .power_table_count = ARRAY_SIZE(power_table),
325 .thermal_table = thermal_table,
326 .thermal_table_count = ARRAY_SIZE(thermal_table),
327 .pmic_i2c_address = 0x34,
330 static acpi_status intel_xpower_pmic_gpio_handler(u32 function,
331 acpi_physical_address address, u32 bit_width, u64 *value,
332 void *handler_context, void *region_context)
337 static int intel_xpower_pmic_opregion_probe(struct platform_device *pdev)
339 struct device *parent = pdev->dev.parent;
340 struct axp20x_dev *axp20x = dev_get_drvdata(parent);
344 status = acpi_install_address_space_handler(ACPI_HANDLE(parent),
345 ACPI_ADR_SPACE_GPIO, intel_xpower_pmic_gpio_handler,
347 if (ACPI_FAILURE(status))
350 result = intel_pmic_install_opregion_handler(&pdev->dev,
351 ACPI_HANDLE(parent), axp20x->regmap,
352 &intel_xpower_pmic_opregion_data);
354 acpi_remove_address_space_handler(ACPI_HANDLE(parent),
356 intel_xpower_pmic_gpio_handler);
361 static struct platform_driver intel_xpower_pmic_opregion_driver = {
362 .probe = intel_xpower_pmic_opregion_probe,
364 .name = "axp288_pmic_acpi",
367 builtin_platform_driver(intel_xpower_pmic_opregion_driver);