drivers/acpi/pmic/intel_pmic_xpower.c - linux - Git at Google

 // SPDX-License-Identifier: GPL-2.0
 /*
  * XPower AXP288 PMIC operation region driver
  *
  * Copyright (C) 2014 Intel Corporation. All rights reserved.
  */

 #include <linux/acpi.h>
 #include <linux/init.h>
 #include <linux/mfd/axp20x.h>
 #include <linux/regmap.h>
 #include <linux/platform_device.h>
 #include <asm/iosf_mbi.h>
 #include "intel_pmic.h"

 #define XPOWER_GPADC_LOW	0x5b
 #define XPOWER_GPI1_CTRL	0x92

 #define GPI1_LDO_MASK		GENMASK(2, 0)
 #define GPI1_LDO_ON		(3 << 0)
 #define GPI1_LDO_OFF		(4 << 0)

 #define AXP288_ADC_TS_CURRENT_ON_OFF_MASK		GENMASK(1, 0)
 #define AXP288_ADC_TS_CURRENT_OFF			(0 << 0)
 #define AXP288_ADC_TS_CURRENT_ON_WHEN_CHARGING		(1 << 0)
 #define AXP288_ADC_TS_CURRENT_ON_ONDEMAND		(2 << 0)
 #define AXP288_ADC_TS_CURRENT_ON			(3 << 0)

 static const struct pmic_table power_table[] = {
 	{
 		.address = 0x00,
 		.reg = 0x13,
 		.bit = 0x05,
 	}, /* ALD1 */
 	{
 		.address = 0x04,
 		.reg = 0x13,
 		.bit = 0x06,
 	}, /* ALD2 */
 	{
 		.address = 0x08,
 		.reg = 0x13,
 		.bit = 0x07,
 	}, /* ALD3 */
 	{
 		.address = 0x0c,
 		.reg = 0x12,
 		.bit = 0x03,
 	}, /* DLD1 */
 	{
 		.address = 0x10,
 		.reg = 0x12,
 		.bit = 0x04,
 	}, /* DLD2 */
 	{
 		.address = 0x14,
 		.reg = 0x12,
 		.bit = 0x05,
 	}, /* DLD3 */
 	{
 		.address = 0x18,
 		.reg = 0x12,
 		.bit = 0x06,
 	}, /* DLD4 */
 	{
 		.address = 0x1c,
 		.reg = 0x12,
 		.bit = 0x00,
 	}, /* ELD1 */
 	{
 		.address = 0x20,
 		.reg = 0x12,
 		.bit = 0x01,
 	}, /* ELD2 */
 	{
 		.address = 0x24,
 		.reg = 0x12,
 		.bit = 0x02,
 	}, /* ELD3 */
 	{
 		.address = 0x28,
 		.reg = 0x13,
 		.bit = 0x02,
 	}, /* FLD1 */
 	{
 		.address = 0x2c,
 		.reg = 0x13,
 		.bit = 0x03,
 	}, /* FLD2 */
 	{
 		.address = 0x30,
 		.reg = 0x13,
 		.bit = 0x04,
 	}, /* FLD3 */
 	{
 		.address = 0x34,
 		.reg = 0x10,
 		.bit = 0x03,
 	}, /* BUC1 */
 	{
 		.address = 0x38,
 		.reg = 0x10,
 		.bit = 0x06,
 	}, /* BUC2 */
 	{
 		.address = 0x3c,
 		.reg = 0x10,
 		.bit = 0x05,
 	}, /* BUC3 */
 	{
 		.address = 0x40,
 		.reg = 0x10,
 		.bit = 0x04,
 	}, /* BUC4 */
 	{
 		.address = 0x44,
 		.reg = 0x10,
 		.bit = 0x01,
 	}, /* BUC5 */
 	{
 		.address = 0x48,
 		.reg = 0x10,
 		.bit = 0x00
 	}, /* BUC6 */
 	{
 		.address = 0x4c,
 		.reg = 0x92,
 	}, /* GPI1 */
 };

 /* TMP0 - TMP5 are the same, all from GPADC */
 static const struct pmic_table thermal_table[] = {
 	{
 		.address = 0x00,
 		.reg = XPOWER_GPADC_LOW
 	},
 	{
 		.address = 0x0c,
 		.reg = XPOWER_GPADC_LOW
 	},
 	{
 		.address = 0x18,
 		.reg = XPOWER_GPADC_LOW
 	},
 	{
 		.address = 0x24,
 		.reg = XPOWER_GPADC_LOW
 	},
 	{
 		.address = 0x30,
 		.reg = XPOWER_GPADC_LOW
 	},
 	{
 		.address = 0x3c,
 		.reg = XPOWER_GPADC_LOW
 	},
 };

 static int intel_xpower_pmic_get_power(struct regmap *regmap, int reg,
 				       int bit, u64 *value)
 {
 	int data;

 	if (regmap_read(regmap, reg, &data))
 		return -EIO;

 	/* GPIO1 LDO regulator needs special handling */
 	if (reg == XPOWER_GPI1_CTRL)
 		*value = ((data & GPI1_LDO_MASK) == GPI1_LDO_ON);
 	else
 		*value = (data & BIT(bit)) ? 1 : 0;

 	return 0;
 }

 static int intel_xpower_pmic_update_power(struct regmap *regmap, int reg,
 					  int bit, bool on)
 {
 	int data, ret;

 	ret = iosf_mbi_block_punit_i2c_access();
 	if (ret)
 		return ret;

 	/* GPIO1 LDO regulator needs special handling */
 	if (reg == XPOWER_GPI1_CTRL) {
 		ret = regmap_update_bits(regmap, reg, GPI1_LDO_MASK,
 					 on ? GPI1_LDO_ON : GPI1_LDO_OFF);
 		goto out;
 	}

 	if (regmap_read(regmap, reg, &data)) {
 		ret = -EIO;
 		goto out;
 	}

 	if (on)
 		data |= BIT(bit);
 	else
 		data &= ~BIT(bit);

 	if (regmap_write(regmap, reg, data))
 		ret = -EIO;
 out:
 	iosf_mbi_unblock_punit_i2c_access();

 	return ret;
 }

 /**
  * intel_xpower_pmic_get_raw_temp(): Get raw temperature reading from the PMIC
  *
  * @regmap: regmap of the PMIC device
  * @reg: register to get the reading
  *
  * Return a positive value on success, errno on failure.
  */
 static int intel_xpower_pmic_get_raw_temp(struct regmap *regmap, int reg)
 {
 	int ret, adc_ts_pin_ctrl;
 	u8 buf[2];

 	/*
 	 * The current-source used for the battery temp-sensor (TS) is shared
 	 * with the GPADC. For proper fuel-gauge and charger operation the TS
 	 * current-source needs to be permanently on. But to read the GPADC we
 	 * need to temporary switch the TS current-source to ondemand, so that
 	 * the GPADC can use it, otherwise we will always read an all 0 value.
 	 *
 	 * Note that the switching from on to on-ondemand is not necessary
 	 * when the TS current-source is off (this happens on devices which
 	 * do not use the TS-pin).
 	 */
 	ret = regmap_read(regmap, AXP288_ADC_TS_PIN_CTRL, &adc_ts_pin_ctrl);
 	if (ret)
 		return ret;

 	if (adc_ts_pin_ctrl & AXP288_ADC_TS_CURRENT_ON_OFF_MASK) {
 		/*
 		 * AXP288_ADC_TS_PIN_CTRL reads are cached by the regmap, so
 		 * this does to a single I2C-transfer, and thus there is no
 		 * need to explicitly call iosf_mbi_block_punit_i2c_access().
 		 */
 		ret = regmap_update_bits(regmap, AXP288_ADC_TS_PIN_CTRL,
 					 AXP288_ADC_TS_CURRENT_ON_OFF_MASK,
 					 AXP288_ADC_TS_CURRENT_ON_ONDEMAND);
 		if (ret)
 			return ret;

 		/* Wait a bit after switching the current-source */
 		usleep_range(6000, 10000);
 	}

 	ret = iosf_mbi_block_punit_i2c_access();
 	if (ret)
 		return ret;

 	ret = regmap_bulk_read(regmap, AXP288_GP_ADC_H, buf, sizeof(buf));
 	if (ret == 0)
 		ret = (buf[0] << 4) + ((buf[1] >> 4) & 0x0f);

 	if (adc_ts_pin_ctrl & AXP288_ADC_TS_CURRENT_ON_OFF_MASK) {
 		regmap_update_bits(regmap, AXP288_ADC_TS_PIN_CTRL,
 				   AXP288_ADC_TS_CURRENT_ON_OFF_MASK,
 				   AXP288_ADC_TS_CURRENT_ON);
 	}

 	iosf_mbi_unblock_punit_i2c_access();

 	return ret;
 }

 static int intel_xpower_exec_mipi_pmic_seq_element(struct regmap *regmap,
 						   u16 i2c_address, u32 reg_address,
 						   u32 value, u32 mask)
 {
 	struct device *dev = regmap_get_device(regmap);
 	int ret;

 	if (i2c_address != 0x34) {
 		dev_err(dev, "Unexpected i2c-addr: 0x%02x (reg-addr 0x%x value 0x%x mask 0x%x)\n",
 			i2c_address, reg_address, value, mask);
 		return -ENXIO;
 	}

 	ret = iosf_mbi_block_punit_i2c_access();
 	if (ret)
 		return ret;

 	ret = regmap_update_bits(regmap, reg_address, mask, value);

 	iosf_mbi_unblock_punit_i2c_access();

 	return ret;
 }

 static int intel_xpower_lpat_raw_to_temp(struct acpi_lpat_conversion_table *lpat_table,
 					 int raw)
 {
 	struct acpi_lpat first = lpat_table->lpat[0];
 	struct acpi_lpat last = lpat_table->lpat[lpat_table->lpat_count - 1];

 	/*
 	 * Some LPAT tables in the ACPI Device for the AXP288 PMIC for some
 	 * reason only describe a small temperature range, e.g. 27° - 37°
 	 * Celcius. Resulting in errors when the tablet is idle in a cool room.
 	 *
 	 * To avoid these errors clamp the raw value to be inside the LPAT.
 	 */
 	if (first.raw < last.raw)
 		raw = clamp(raw, first.raw, last.raw);
 	else
 		raw = clamp(raw, last.raw, first.raw);

 	return acpi_lpat_raw_to_temp(lpat_table, raw);
 }

 static const struct intel_pmic_opregion_data intel_xpower_pmic_opregion_data = {
 	.get_power = intel_xpower_pmic_get_power,
 	.update_power = intel_xpower_pmic_update_power,
 	.get_raw_temp = intel_xpower_pmic_get_raw_temp,
 	.exec_mipi_pmic_seq_element = intel_xpower_exec_mipi_pmic_seq_element,
 	.lpat_raw_to_temp = intel_xpower_lpat_raw_to_temp,
 	.power_table = power_table,
 	.power_table_count = ARRAY_SIZE(power_table),
 	.thermal_table = thermal_table,
 	.thermal_table_count = ARRAY_SIZE(thermal_table),
 	.pmic_i2c_address = 0x34,
 };

 static acpi_status intel_xpower_pmic_gpio_handler(u32 function,
 		acpi_physical_address address, u32 bit_width, u64 *value,
 		void *handler_context, void *region_context)
 {
 	return AE_OK;
 }

 static int intel_xpower_pmic_opregion_probe(struct platform_device *pdev)
 {
 	struct device *parent = pdev->dev.parent;
 	struct axp20x_dev *axp20x = dev_get_drvdata(parent);
 	acpi_status status;
 	int result;

 	status = acpi_install_address_space_handler(ACPI_HANDLE(parent),
 			ACPI_ADR_SPACE_GPIO, intel_xpower_pmic_gpio_handler,
 			NULL, NULL);
 	if (ACPI_FAILURE(status))
 		return -ENODEV;

 	result = intel_pmic_install_opregion_handler(&pdev->dev,
 					ACPI_HANDLE(parent), axp20x->regmap,
 					&intel_xpower_pmic_opregion_data);
 	if (result)
 		acpi_remove_address_space_handler(ACPI_HANDLE(parent),
 						  ACPI_ADR_SPACE_GPIO,
 						  intel_xpower_pmic_gpio_handler);

 	return result;
 }

 static struct platform_driver intel_xpower_pmic_opregion_driver = {
 	.probe = intel_xpower_pmic_opregion_probe,
 	.driver = {
 		.name = "axp288_pmic_acpi",
 	},
 };
 builtin_platform_driver(intel_xpower_pmic_opregion_driver);
	// SPDX-License-Identifier: GPL-2.0
	/*
	* XPower AXP288 PMIC operation region driver
	*
	* Copyright (C) 2014 Intel Corporation. All rights reserved.
	*/

	#include <linux/acpi.h>
	#include <linux/init.h>
	#include <linux/mfd/axp20x.h>
	#include <linux/regmap.h>
	#include <linux/platform_device.h>
	#include <asm/iosf_mbi.h>
	#include "intel_pmic.h"

	#define XPOWER_GPADC_LOW 0x5b
	#define XPOWER_GPI1_CTRL 0x92

	#define GPI1_LDO_MASK GENMASK(2, 0)
	#define GPI1_LDO_ON (3 << 0)
	#define GPI1_LDO_OFF (4 << 0)

	#define AXP288_ADC_TS_CURRENT_ON_OFF_MASK GENMASK(1, 0)
	#define AXP288_ADC_TS_CURRENT_OFF (0 << 0)
	#define AXP288_ADC_TS_CURRENT_ON_WHEN_CHARGING (1 << 0)
	#define AXP288_ADC_TS_CURRENT_ON_ONDEMAND (2 << 0)
	#define AXP288_ADC_TS_CURRENT_ON (3 << 0)

	static const struct pmic_table power_table[] = {
	{
	.address = 0x00,
	.reg = 0x13,
	.bit = 0x05,
	}, /* ALD1 */
	{
	.address = 0x04,
	.reg = 0x13,
	.bit = 0x06,
	}, /* ALD2 */
	{
	.address = 0x08,
	.reg = 0x13,
	.bit = 0x07,
	}, /* ALD3 */
	{
	.address = 0x0c,
	.reg = 0x12,
	.bit = 0x03,
	}, /* DLD1 */
	{
	.address = 0x10,
	.reg = 0x12,
	.bit = 0x04,
	}, /* DLD2 */
	{
	.address = 0x14,
	.reg = 0x12,
	.bit = 0x05,
	}, /* DLD3 */
	{
	.address = 0x18,
	.reg = 0x12,
	.bit = 0x06,
	}, /* DLD4 */
	{
	.address = 0x1c,
	.reg = 0x12,
	.bit = 0x00,
	}, /* ELD1 */
	{
	.address = 0x20,
	.reg = 0x12,
	.bit = 0x01,
	}, /* ELD2 */
	{
	.address = 0x24,
	.reg = 0x12,
	.bit = 0x02,
	}, /* ELD3 */
	{
	.address = 0x28,
	.reg = 0x13,
	.bit = 0x02,
	}, /* FLD1 */
	{
	.address = 0x2c,
	.reg = 0x13,
	.bit = 0x03,
	}, /* FLD2 */
	{
	.address = 0x30,
	.reg = 0x13,
	.bit = 0x04,
	}, /* FLD3 */
	{
	.address = 0x34,
	.reg = 0x10,
	.bit = 0x03,
	}, /* BUC1 */
	{
	.address = 0x38,
	.reg = 0x10,
	.bit = 0x06,
	}, /* BUC2 */
	{
	.address = 0x3c,
	.reg = 0x10,
	.bit = 0x05,
	}, /* BUC3 */
	{
	.address = 0x40,
	.reg = 0x10,
	.bit = 0x04,
	}, /* BUC4 */
	{
	.address = 0x44,
	.reg = 0x10,
	.bit = 0x01,
	}, /* BUC5 */
	{
	.address = 0x48,
	.reg = 0x10,
	.bit = 0x00
	}, /* BUC6 */
	{
	.address = 0x4c,
	.reg = 0x92,
	}, /* GPI1 */
	};

	/* TMP0 - TMP5 are the same, all from GPADC */
	static const struct pmic_table thermal_table[] = {
	{
	.address = 0x00,
	.reg = XPOWER_GPADC_LOW
	},
	{
	.address = 0x0c,
	.reg = XPOWER_GPADC_LOW
	},
	{
	.address = 0x18,
	.reg = XPOWER_GPADC_LOW
	},
	{
	.address = 0x24,
	.reg = XPOWER_GPADC_LOW
	},
	{
	.address = 0x30,
	.reg = XPOWER_GPADC_LOW
	},
	{
	.address = 0x3c,
	.reg = XPOWER_GPADC_LOW
	},
	};

	static int intel_xpower_pmic_get_power(struct regmap *regmap, int reg,
	int bit, u64 *value)
	{
	int data;

	if (regmap_read(regmap, reg, &data))
	return -EIO;

	/* GPIO1 LDO regulator needs special handling */
	if (reg == XPOWER_GPI1_CTRL)
	*value = ((data & GPI1_LDO_MASK) == GPI1_LDO_ON);
	else
	*value = (data & BIT(bit)) ? 1 : 0;

	return 0;
	}

	static int intel_xpower_pmic_update_power(struct regmap *regmap, int reg,
	int bit, bool on)
	{
	int data, ret;

	ret = iosf_mbi_block_punit_i2c_access();
	if (ret)
	return ret;

	/* GPIO1 LDO regulator needs special handling */
	if (reg == XPOWER_GPI1_CTRL) {
	ret = regmap_update_bits(regmap, reg, GPI1_LDO_MASK,
	on ? GPI1_LDO_ON : GPI1_LDO_OFF);
	goto out;
	}

	if (regmap_read(regmap, reg, &data)) {
	ret = -EIO;
	goto out;
	}

	if (on)
	data \|= BIT(bit);
	else
	data &= ~BIT(bit);

	if (regmap_write(regmap, reg, data))
	ret = -EIO;
	out:
	iosf_mbi_unblock_punit_i2c_access();

	return ret;
	}

	/**
	* intel_xpower_pmic_get_raw_temp(): Get raw temperature reading from the PMIC
	*
	* @regmap: regmap of the PMIC device
	* @reg: register to get the reading
	*
	* Return a positive value on success, errno on failure.
	*/
	static int intel_xpower_pmic_get_raw_temp(struct regmap *regmap, int reg)
	{
	int ret, adc_ts_pin_ctrl;
	u8 buf[2];

	/*
	* The current-source used for the battery temp-sensor (TS) is shared
	* with the GPADC. For proper fuel-gauge and charger operation the TS
	* current-source needs to be permanently on. But to read the GPADC we
	* need to temporary switch the TS current-source to ondemand, so that
	* the GPADC can use it, otherwise we will always read an all 0 value.
	*
	* Note that the switching from on to on-ondemand is not necessary
	* when the TS current-source is off (this happens on devices which
	* do not use the TS-pin).
	*/
	ret = regmap_read(regmap, AXP288_ADC_TS_PIN_CTRL, &adc_ts_pin_ctrl);
	if (ret)
	return ret;

	if (adc_ts_pin_ctrl & AXP288_ADC_TS_CURRENT_ON_OFF_MASK) {
	/*
	* AXP288_ADC_TS_PIN_CTRL reads are cached by the regmap, so
	* this does to a single I2C-transfer, and thus there is no
	* need to explicitly call iosf_mbi_block_punit_i2c_access().
	*/
	ret = regmap_update_bits(regmap, AXP288_ADC_TS_PIN_CTRL,
	AXP288_ADC_TS_CURRENT_ON_OFF_MASK,
	AXP288_ADC_TS_CURRENT_ON_ONDEMAND);
	if (ret)
	return ret;

	/* Wait a bit after switching the current-source */
	usleep_range(6000, 10000);
	}

	ret = iosf_mbi_block_punit_i2c_access();
	if (ret)
	return ret;

	ret = regmap_bulk_read(regmap, AXP288_GP_ADC_H, buf, sizeof(buf));
	if (ret == 0)
	ret = (buf[0] << 4) + ((buf[1] >> 4) & 0x0f);

	if (adc_ts_pin_ctrl & AXP288_ADC_TS_CURRENT_ON_OFF_MASK) {
	regmap_update_bits(regmap, AXP288_ADC_TS_PIN_CTRL,
	AXP288_ADC_TS_CURRENT_ON_OFF_MASK,
	AXP288_ADC_TS_CURRENT_ON);
	}

	iosf_mbi_unblock_punit_i2c_access();

	return ret;
	}

	static int intel_xpower_exec_mipi_pmic_seq_element(struct regmap *regmap,
	u16 i2c_address, u32 reg_address,
	u32 value, u32 mask)
	{
	struct device *dev = regmap_get_device(regmap);
	int ret;

	if (i2c_address != 0x34) {
	dev_err(dev, "Unexpected i2c-addr: 0x%02x (reg-addr 0x%x value 0x%x mask 0x%x)\n",
	i2c_address, reg_address, value, mask);
	return -ENXIO;
	}

	ret = iosf_mbi_block_punit_i2c_access();
	if (ret)
	return ret;

	ret = regmap_update_bits(regmap, reg_address, mask, value);

	iosf_mbi_unblock_punit_i2c_access();

	return ret;
	}

	static int intel_xpower_lpat_raw_to_temp(struct acpi_lpat_conversion_table *lpat_table,
	int raw)
	{
	struct acpi_lpat first = lpat_table->lpat[0];
	struct acpi_lpat last = lpat_table->lpat[lpat_table->lpat_count - 1];

	/*
	* Some LPAT tables in the ACPI Device for the AXP288 PMIC for some
	* reason only describe a small temperature range, e.g. 27° - 37°
	* Celcius. Resulting in errors when the tablet is idle in a cool room.
	*
	* To avoid these errors clamp the raw value to be inside the LPAT.
	*/
	if (first.raw < last.raw)
	raw = clamp(raw, first.raw, last.raw);
	else
	raw = clamp(raw, last.raw, first.raw);

	return acpi_lpat_raw_to_temp(lpat_table, raw);
	}

	static const struct intel_pmic_opregion_data intel_xpower_pmic_opregion_data = {
	.get_power = intel_xpower_pmic_get_power,
	.update_power = intel_xpower_pmic_update_power,
	.get_raw_temp = intel_xpower_pmic_get_raw_temp,
	.exec_mipi_pmic_seq_element = intel_xpower_exec_mipi_pmic_seq_element,
	.lpat_raw_to_temp = intel_xpower_lpat_raw_to_temp,
	.power_table = power_table,
	.power_table_count = ARRAY_SIZE(power_table),
	.thermal_table = thermal_table,
	.thermal_table_count = ARRAY_SIZE(thermal_table),
	.pmic_i2c_address = 0x34,
	};

	static acpi_status intel_xpower_pmic_gpio_handler(u32 function,
	acpi_physical_address address, u32 bit_width, u64 *value,
	void handler_context, void region_context)
	{
	return AE_OK;
	}

	static int intel_xpower_pmic_opregion_probe(struct platform_device *pdev)
	{
	struct device *parent = pdev->dev.parent;
	struct axp20x_dev *axp20x = dev_get_drvdata(parent);
	acpi_status status;
	int result;

	status = acpi_install_address_space_handler(ACPI_HANDLE(parent),
	ACPI_ADR_SPACE_GPIO, intel_xpower_pmic_gpio_handler,
	NULL, NULL);
	if (ACPI_FAILURE(status))
	return -ENODEV;

	result = intel_pmic_install_opregion_handler(&pdev->dev,
	ACPI_HANDLE(parent), axp20x->regmap,
	&intel_xpower_pmic_opregion_data);
	if (result)
	acpi_remove_address_space_handler(ACPI_HANDLE(parent),
	ACPI_ADR_SPACE_GPIO,
	intel_xpower_pmic_gpio_handler);

	return result;
	}

	static struct platform_driver intel_xpower_pmic_opregion_driver = {
	.probe = intel_xpower_pmic_opregion_probe,
	.driver = {
	.name = "axp288_pmic_acpi",
	},
	};
	builtin_platform_driver(intel_xpower_pmic_opregion_driver);