drivers/acpi/pmic/tps68470_pmic.c - linux - Git at Google

 // SPDX-License-Identifier: GPL-2.0
 /*
  * TI TPS68470 PMIC operation region driver
  *
  * Copyright (C) 2017 Intel Corporation. All rights reserved.
  *
  * Author: Rajmohan Mani <rajmohan.mani@intel.com>
  *
  * Based on drivers/acpi/pmic/intel_pmic* drivers
  */

 #include <linux/acpi.h>
 #include <linux/init.h>
 #include <linux/mfd/tps68470.h>
 #include <linux/platform_device.h>
 #include <linux/regmap.h>

 struct tps68470_pmic_table {
 	u32 address;		/* operation region address */
 	u32 reg;		/* corresponding register */
 	u32 bitmask;		/* bit mask for power, clock */
 };

 #define TI_PMIC_POWER_OPREGION_ID		0xB0
 #define TI_PMIC_VR_VAL_OPREGION_ID		0xB1
 #define TI_PMIC_CLOCK_OPREGION_ID		0xB2
 #define TI_PMIC_CLKFREQ_OPREGION_ID		0xB3

 struct tps68470_pmic_opregion {
 	struct mutex lock;
 	struct regmap *regmap;
 };

 #define S_IO_I2C_EN	(BIT(0) | BIT(1))

 static const struct tps68470_pmic_table power_table[] = {
 	{
 		.address = 0x00,
 		.reg = TPS68470_REG_S_I2C_CTL,
 		.bitmask = S_IO_I2C_EN,
 		/* S_I2C_CTL */
 	},
 	{
 		.address = 0x04,
 		.reg = TPS68470_REG_VCMCTL,
 		.bitmask = BIT(0),
 		/* VCMCTL */
 	},
 	{
 		.address = 0x08,
 		.reg = TPS68470_REG_VAUX1CTL,
 		.bitmask = BIT(0),
 		/* VAUX1_CTL */
 	},
 	{
 		.address = 0x0C,
 		.reg = TPS68470_REG_VAUX2CTL,
 		.bitmask = BIT(0),
 		/* VAUX2CTL */
 	},
 	{
 		.address = 0x10,
 		.reg = TPS68470_REG_VACTL,
 		.bitmask = BIT(0),
 		/* VACTL */
 	},
 	{
 		.address = 0x14,
 		.reg = TPS68470_REG_VDCTL,
 		.bitmask = BIT(0),
 		/* VDCTL */
 	},
 };

 /* Table to set voltage regulator value */
 static const struct tps68470_pmic_table vr_val_table[] = {
 	{
 		.address = 0x00,
 		.reg = TPS68470_REG_VSIOVAL,
 		.bitmask = TPS68470_VSIOVAL_IOVOLT_MASK,
 		/* TPS68470_REG_VSIOVAL */
 	},
 	{
 		.address = 0x04,
 		.reg = TPS68470_REG_VIOVAL,
 		.bitmask = TPS68470_VIOVAL_IOVOLT_MASK,
 		/* TPS68470_REG_VIOVAL */
 	},
 	{
 		.address = 0x08,
 		.reg = TPS68470_REG_VCMVAL,
 		.bitmask = TPS68470_VCMVAL_VCVOLT_MASK,
 		/* TPS68470_REG_VCMVAL */
 	},
 	{
 		.address = 0x0C,
 		.reg = TPS68470_REG_VAUX1VAL,
 		.bitmask = TPS68470_VAUX1VAL_AUX1VOLT_MASK,
 		/* TPS68470_REG_VAUX1VAL */
 	},
 	{
 		.address = 0x10,
 		.reg = TPS68470_REG_VAUX2VAL,
 		.bitmask = TPS68470_VAUX2VAL_AUX2VOLT_MASK,
 		/* TPS68470_REG_VAUX2VAL */
 	},
 	{
 		.address = 0x14,
 		.reg = TPS68470_REG_VAVAL,
 		.bitmask = TPS68470_VAVAL_AVOLT_MASK,
 		/* TPS68470_REG_VAVAL */
 	},
 	{
 		.address = 0x18,
 		.reg = TPS68470_REG_VDVAL,
 		.bitmask = TPS68470_VDVAL_DVOLT_MASK,
 		/* TPS68470_REG_VDVAL */
 	},
 };

 /* Table to configure clock frequency */
 static const struct tps68470_pmic_table clk_freq_table[] = {
 	{
 		.address = 0x00,
 		.reg = TPS68470_REG_POSTDIV2,
 		.bitmask = BIT(0) | BIT(1),
 		/* TPS68470_REG_POSTDIV2 */
 	},
 	{
 		.address = 0x04,
 		.reg = TPS68470_REG_BOOSTDIV,
 		.bitmask = 0x1F,
 		/* TPS68470_REG_BOOSTDIV */
 	},
 	{
 		.address = 0x08,
 		.reg = TPS68470_REG_BUCKDIV,
 		.bitmask = 0x0F,
 		/* TPS68470_REG_BUCKDIV */
 	},
 	{
 		.address = 0x0C,
 		.reg = TPS68470_REG_PLLSWR,
 		.bitmask = 0x13,
 		/* TPS68470_REG_PLLSWR */
 	},
 	{
 		.address = 0x10,
 		.reg = TPS68470_REG_XTALDIV,
 		.bitmask = 0xFF,
 		/* TPS68470_REG_XTALDIV */
 	},
 	{
 		.address = 0x14,
 		.reg = TPS68470_REG_PLLDIV,
 		.bitmask = 0xFF,
 		/* TPS68470_REG_PLLDIV */
 	},
 	{
 		.address = 0x18,
 		.reg = TPS68470_REG_POSTDIV,
 		.bitmask = 0x83,
 		/* TPS68470_REG_POSTDIV */
 	},
 };

 /* Table to configure and enable clocks */
 static const struct tps68470_pmic_table clk_table[] = {
 	{
 		.address = 0x00,
 		.reg = TPS68470_REG_PLLCTL,
 		.bitmask = 0xF5,
 		/* TPS68470_REG_PLLCTL */
 	},
 	{
 		.address = 0x04,
 		.reg = TPS68470_REG_PLLCTL2,
 		.bitmask = BIT(0),
 		/* TPS68470_REG_PLLCTL2 */
 	},
 	{
 		.address = 0x08,
 		.reg = TPS68470_REG_CLKCFG1,
 		.bitmask = TPS68470_CLKCFG1_MODE_A_MASK |
 			TPS68470_CLKCFG1_MODE_B_MASK,
 		/* TPS68470_REG_CLKCFG1 */
 	},
 	{
 		.address = 0x0C,
 		.reg = TPS68470_REG_CLKCFG2,
 		.bitmask = TPS68470_CLKCFG1_MODE_A_MASK |
 			TPS68470_CLKCFG1_MODE_B_MASK,
 		/* TPS68470_REG_CLKCFG2 */
 	},
 };

 static int pmic_get_reg_bit(u64 address,
 			    const struct tps68470_pmic_table *table,
 			    const unsigned int table_size, int *reg,
 			    int *bitmask)
 {
 	u64 i;

 	i = address / 4;
 	if (i >= table_size)
 		return -ENOENT;

 	if (!reg || !bitmask)
 		return -EINVAL;

 	*reg = table[i].reg;
 	*bitmask = table[i].bitmask;

 	return 0;
 }

 static int tps68470_pmic_get_power(struct regmap *regmap, int reg,
 				       int bitmask, u64 *value)
 {
 	unsigned int data;

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

 	*value = (data & bitmask) ? 1 : 0;
 	return 0;
 }

 static int tps68470_pmic_get_vr_val(struct regmap *regmap, int reg,
 				       int bitmask, u64 *value)
 {
 	unsigned int data;

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

 	*value = data & bitmask;
 	return 0;
 }

 static int tps68470_pmic_get_clk(struct regmap *regmap, int reg,
 				       int bitmask, u64 *value)
 {
 	unsigned int data;

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

 	*value = (data & bitmask) ? 1 : 0;
 	return 0;
 }

 static int tps68470_pmic_get_clk_freq(struct regmap *regmap, int reg,
 				       int bitmask, u64 *value)
 {
 	unsigned int data;

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

 	*value = data & bitmask;
 	return 0;
 }

 static int ti_tps68470_regmap_update_bits(struct regmap *regmap, int reg,
 					int bitmask, u64 value)
 {
 	return regmap_update_bits(regmap, reg, bitmask, value);
 }

 static acpi_status tps68470_pmic_common_handler(u32 function,
 					  acpi_physical_address address,
 					  u32 bits, u64 *value,
 					  void *region_context,
 					  int (*get)(struct regmap *,
 						     int, int, u64 *),
 					  int (*update)(struct regmap *,
 							int, int, u64),
 					  const struct tps68470_pmic_table *tbl,
 					  unsigned int tbl_size)
 {
 	struct tps68470_pmic_opregion *opregion = region_context;
 	struct regmap *regmap = opregion->regmap;
 	int reg, ret, bitmask;

 	if (bits != 32)
 		return AE_BAD_PARAMETER;

 	ret = pmic_get_reg_bit(address, tbl, tbl_size, &reg, &bitmask);
 	if (ret < 0)
 		return AE_BAD_PARAMETER;

 	if (function == ACPI_WRITE && *value > bitmask)
 		return AE_BAD_PARAMETER;

 	mutex_lock(&opregion->lock);

 	ret = (function == ACPI_READ) ?
 		get(regmap, reg, bitmask, value) :
 		update(regmap, reg, bitmask, *value);

 	mutex_unlock(&opregion->lock);

 	return ret ? AE_ERROR : AE_OK;
 }

 static acpi_status tps68470_pmic_cfreq_handler(u32 function,
 					    acpi_physical_address address,
 					    u32 bits, u64 *value,
 					    void *handler_context,
 					    void *region_context)
 {
 	return tps68470_pmic_common_handler(function, address, bits, value,
 				region_context,
 				tps68470_pmic_get_clk_freq,
 				ti_tps68470_regmap_update_bits,
 				clk_freq_table,
 				ARRAY_SIZE(clk_freq_table));
 }

 static acpi_status tps68470_pmic_clk_handler(u32 function,
 				       acpi_physical_address address, u32 bits,
 				       u64 *value, void *handler_context,
 				       void *region_context)
 {
 	return tps68470_pmic_common_handler(function, address, bits, value,
 				region_context,
 				tps68470_pmic_get_clk,
 				ti_tps68470_regmap_update_bits,
 				clk_table,
 				ARRAY_SIZE(clk_table));
 }

 static acpi_status tps68470_pmic_vrval_handler(u32 function,
 					  acpi_physical_address address,
 					  u32 bits, u64 *value,
 					  void *handler_context,
 					  void *region_context)
 {
 	return tps68470_pmic_common_handler(function, address, bits, value,
 				region_context,
 				tps68470_pmic_get_vr_val,
 				ti_tps68470_regmap_update_bits,
 				vr_val_table,
 				ARRAY_SIZE(vr_val_table));
 }

 static acpi_status tps68470_pmic_pwr_handler(u32 function,
 					 acpi_physical_address address,
 					 u32 bits, u64 *value,
 					 void *handler_context,
 					 void *region_context)
 {
 	if (bits != 32)
 		return AE_BAD_PARAMETER;

 	/* set/clear for bit 0, bits 0 and 1 together */
 	if (function == ACPI_WRITE &&
 	    !(*value == 0 || *value == 1 || *value == 3)) {
 		return AE_BAD_PARAMETER;
 	}

 	return tps68470_pmic_common_handler(function, address, bits, value,
 				region_context,
 				tps68470_pmic_get_power,
 				ti_tps68470_regmap_update_bits,
 				power_table,
 				ARRAY_SIZE(power_table));
 }

 static int tps68470_pmic_opregion_probe(struct platform_device *pdev)
 {
 	struct regmap *tps68470_regmap = dev_get_drvdata(pdev->dev.parent);
 	acpi_handle handle = ACPI_HANDLE(pdev->dev.parent);
 	struct device *dev = &pdev->dev;
 	struct tps68470_pmic_opregion *opregion;
 	acpi_status status;

 	if (!tps68470_regmap)
 		return dev_err_probe(dev, -EINVAL, "regmap is missing\n");

 	if (!handle) {
 		dev_warn(dev, "acpi handle is NULL\n");
 		return -ENODEV;
 	}

 	opregion = devm_kzalloc(dev, sizeof(*opregion), GFP_KERNEL);
 	if (!opregion)
 		return -ENOMEM;

 	mutex_init(&opregion->lock);
 	opregion->regmap = tps68470_regmap;

 	status = acpi_install_address_space_handler(handle,
 						    TI_PMIC_POWER_OPREGION_ID,
 						    tps68470_pmic_pwr_handler,
 						    NULL, opregion);
 	if (ACPI_FAILURE(status))
 		goto out_mutex_destroy;

 	status = acpi_install_address_space_handler(handle,
 						    TI_PMIC_VR_VAL_OPREGION_ID,
 						    tps68470_pmic_vrval_handler,
 						    NULL, opregion);
 	if (ACPI_FAILURE(status))
 		goto out_remove_power_handler;

 	status = acpi_install_address_space_handler(handle,
 						    TI_PMIC_CLOCK_OPREGION_ID,
 						    tps68470_pmic_clk_handler,
 						    NULL, opregion);
 	if (ACPI_FAILURE(status))
 		goto out_remove_vr_val_handler;

 	status = acpi_install_address_space_handler(handle,
 						    TI_PMIC_CLKFREQ_OPREGION_ID,
 						    tps68470_pmic_cfreq_handler,
 						    NULL, opregion);
 	if (ACPI_FAILURE(status))
 		goto out_remove_clk_handler;

 	return 0;

 out_remove_clk_handler:
 	acpi_remove_address_space_handler(handle, TI_PMIC_CLOCK_OPREGION_ID,
 					  tps68470_pmic_clk_handler);
 out_remove_vr_val_handler:
 	acpi_remove_address_space_handler(handle, TI_PMIC_VR_VAL_OPREGION_ID,
 					  tps68470_pmic_vrval_handler);
 out_remove_power_handler:
 	acpi_remove_address_space_handler(handle, TI_PMIC_POWER_OPREGION_ID,
 					  tps68470_pmic_pwr_handler);
 out_mutex_destroy:
 	mutex_destroy(&opregion->lock);
 	return -ENODEV;
 }

 static struct platform_driver tps68470_pmic_opregion_driver = {
 	.probe = tps68470_pmic_opregion_probe,
 	.driver = {
 		.name = "tps68470_pmic_opregion",
 	},
 };

 builtin_platform_driver(tps68470_pmic_opregion_driver)
	// SPDX-License-Identifier: GPL-2.0
	/*
	* TI TPS68470 PMIC operation region driver
	*
	* Copyright (C) 2017 Intel Corporation. All rights reserved.
	*
	* Author: Rajmohan Mani <rajmohan.mani@intel.com>
	*
	* Based on drivers/acpi/pmic/intel_pmic* drivers
	*/

	#include <linux/acpi.h>
	#include <linux/init.h>
	#include <linux/mfd/tps68470.h>
	#include <linux/platform_device.h>
	#include <linux/regmap.h>

	struct tps68470_pmic_table {
	u32 address; /* operation region address */
	u32 reg; /* corresponding register */
	u32 bitmask; /* bit mask for power, clock */
	};

	#define TI_PMIC_POWER_OPREGION_ID 0xB0
	#define TI_PMIC_VR_VAL_OPREGION_ID 0xB1
	#define TI_PMIC_CLOCK_OPREGION_ID 0xB2
	#define TI_PMIC_CLKFREQ_OPREGION_ID 0xB3

	struct tps68470_pmic_opregion {
	struct mutex lock;
	struct regmap *regmap;
	};

	#define S_IO_I2C_EN (BIT(0) \| BIT(1))

	static const struct tps68470_pmic_table power_table[] = {
	{
	.address = 0x00,
	.reg = TPS68470_REG_S_I2C_CTL,
	.bitmask = S_IO_I2C_EN,
	/* S_I2C_CTL */
	},
	{
	.address = 0x04,
	.reg = TPS68470_REG_VCMCTL,
	.bitmask = BIT(0),
	/* VCMCTL */
	},
	{
	.address = 0x08,
	.reg = TPS68470_REG_VAUX1CTL,
	.bitmask = BIT(0),
	/* VAUX1_CTL */
	},
	{
	.address = 0x0C,
	.reg = TPS68470_REG_VAUX2CTL,
	.bitmask = BIT(0),
	/* VAUX2CTL */
	},
	{
	.address = 0x10,
	.reg = TPS68470_REG_VACTL,
	.bitmask = BIT(0),
	/* VACTL */
	},
	{
	.address = 0x14,
	.reg = TPS68470_REG_VDCTL,
	.bitmask = BIT(0),
	/* VDCTL */
	},
	};

	/* Table to set voltage regulator value */
	static const struct tps68470_pmic_table vr_val_table[] = {
	{
	.address = 0x00,
	.reg = TPS68470_REG_VSIOVAL,
	.bitmask = TPS68470_VSIOVAL_IOVOLT_MASK,
	/* TPS68470_REG_VSIOVAL */
	},
	{
	.address = 0x04,
	.reg = TPS68470_REG_VIOVAL,
	.bitmask = TPS68470_VIOVAL_IOVOLT_MASK,
	/* TPS68470_REG_VIOVAL */
	},
	{
	.address = 0x08,
	.reg = TPS68470_REG_VCMVAL,
	.bitmask = TPS68470_VCMVAL_VCVOLT_MASK,
	/* TPS68470_REG_VCMVAL */
	},
	{
	.address = 0x0C,
	.reg = TPS68470_REG_VAUX1VAL,
	.bitmask = TPS68470_VAUX1VAL_AUX1VOLT_MASK,
	/* TPS68470_REG_VAUX1VAL */
	},
	{
	.address = 0x10,
	.reg = TPS68470_REG_VAUX2VAL,
	.bitmask = TPS68470_VAUX2VAL_AUX2VOLT_MASK,
	/* TPS68470_REG_VAUX2VAL */
	},
	{
	.address = 0x14,
	.reg = TPS68470_REG_VAVAL,
	.bitmask = TPS68470_VAVAL_AVOLT_MASK,
	/* TPS68470_REG_VAVAL */
	},
	{
	.address = 0x18,
	.reg = TPS68470_REG_VDVAL,
	.bitmask = TPS68470_VDVAL_DVOLT_MASK,
	/* TPS68470_REG_VDVAL */
	},
	};

	/* Table to configure clock frequency */
	static const struct tps68470_pmic_table clk_freq_table[] = {
	{
	.address = 0x00,
	.reg = TPS68470_REG_POSTDIV2,
	.bitmask = BIT(0) \| BIT(1),
	/* TPS68470_REG_POSTDIV2 */
	},
	{
	.address = 0x04,
	.reg = TPS68470_REG_BOOSTDIV,
	.bitmask = 0x1F,
	/* TPS68470_REG_BOOSTDIV */
	},
	{
	.address = 0x08,
	.reg = TPS68470_REG_BUCKDIV,
	.bitmask = 0x0F,
	/* TPS68470_REG_BUCKDIV */
	},
	{
	.address = 0x0C,
	.reg = TPS68470_REG_PLLSWR,
	.bitmask = 0x13,
	/* TPS68470_REG_PLLSWR */
	},
	{
	.address = 0x10,
	.reg = TPS68470_REG_XTALDIV,
	.bitmask = 0xFF,
	/* TPS68470_REG_XTALDIV */
	},
	{
	.address = 0x14,
	.reg = TPS68470_REG_PLLDIV,
	.bitmask = 0xFF,
	/* TPS68470_REG_PLLDIV */
	},
	{
	.address = 0x18,
	.reg = TPS68470_REG_POSTDIV,
	.bitmask = 0x83,
	/* TPS68470_REG_POSTDIV */
	},
	};

	/* Table to configure and enable clocks */
	static const struct tps68470_pmic_table clk_table[] = {
	{
	.address = 0x00,
	.reg = TPS68470_REG_PLLCTL,
	.bitmask = 0xF5,
	/* TPS68470_REG_PLLCTL */
	},
	{
	.address = 0x04,
	.reg = TPS68470_REG_PLLCTL2,
	.bitmask = BIT(0),
	/* TPS68470_REG_PLLCTL2 */
	},
	{
	.address = 0x08,
	.reg = TPS68470_REG_CLKCFG1,
	.bitmask = TPS68470_CLKCFG1_MODE_A_MASK \|
	TPS68470_CLKCFG1_MODE_B_MASK,
	/* TPS68470_REG_CLKCFG1 */
	},
	{
	.address = 0x0C,
	.reg = TPS68470_REG_CLKCFG2,
	.bitmask = TPS68470_CLKCFG1_MODE_A_MASK \|
	TPS68470_CLKCFG1_MODE_B_MASK,
	/* TPS68470_REG_CLKCFG2 */
	},
	};

	static int pmic_get_reg_bit(u64 address,
	const struct tps68470_pmic_table *table,
	const unsigned int table_size, int *reg,
	int *bitmask)
	{
	u64 i;

	i = address / 4;
	if (i >= table_size)
	return -ENOENT;

	if (!reg \|\| !bitmask)
	return -EINVAL;

	*reg = table[i].reg;
	*bitmask = table[i].bitmask;

	return 0;
	}

	static int tps68470_pmic_get_power(struct regmap *regmap, int reg,
	int bitmask, u64 *value)
	{
	unsigned int data;

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

	*value = (data & bitmask) ? 1 : 0;
	return 0;
	}

	static int tps68470_pmic_get_vr_val(struct regmap *regmap, int reg,
	int bitmask, u64 *value)
	{
	unsigned int data;

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

	*value = data & bitmask;
	return 0;
	}

	static int tps68470_pmic_get_clk(struct regmap *regmap, int reg,
	int bitmask, u64 *value)
	{
	unsigned int data;

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

	*value = (data & bitmask) ? 1 : 0;
	return 0;
	}

	static int tps68470_pmic_get_clk_freq(struct regmap *regmap, int reg,
	int bitmask, u64 *value)
	{
	unsigned int data;

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

	*value = data & bitmask;
	return 0;
	}

	static int ti_tps68470_regmap_update_bits(struct regmap *regmap, int reg,
	int bitmask, u64 value)
	{
	return regmap_update_bits(regmap, reg, bitmask, value);
	}

	static acpi_status tps68470_pmic_common_handler(u32 function,
	acpi_physical_address address,
	u32 bits, u64 *value,
	void *region_context,
	int (get)(struct regmap ,
	int, int, u64 *),
	int (update)(struct regmap ,
	int, int, u64),
	const struct tps68470_pmic_table *tbl,
	unsigned int tbl_size)
	{
	struct tps68470_pmic_opregion *opregion = region_context;
	struct regmap *regmap = opregion->regmap;
	int reg, ret, bitmask;

	if (bits != 32)
	return AE_BAD_PARAMETER;

	ret = pmic_get_reg_bit(address, tbl, tbl_size, &reg, &bitmask);
	if (ret < 0)
	return AE_BAD_PARAMETER;

	if (function == ACPI_WRITE && *value > bitmask)
	return AE_BAD_PARAMETER;

	mutex_lock(&opregion->lock);

	ret = (function == ACPI_READ) ?
	get(regmap, reg, bitmask, value) :
	update(regmap, reg, bitmask, *value);

	mutex_unlock(&opregion->lock);

	return ret ? AE_ERROR : AE_OK;
	}

	static acpi_status tps68470_pmic_cfreq_handler(u32 function,
	acpi_physical_address address,
	u32 bits, u64 *value,
	void *handler_context,
	void *region_context)
	{
	return tps68470_pmic_common_handler(function, address, bits, value,
	region_context,
	tps68470_pmic_get_clk_freq,
	ti_tps68470_regmap_update_bits,
	clk_freq_table,
	ARRAY_SIZE(clk_freq_table));
	}

	static acpi_status tps68470_pmic_clk_handler(u32 function,
	acpi_physical_address address, u32 bits,
	u64 value, void handler_context,
	void *region_context)
	{
	return tps68470_pmic_common_handler(function, address, bits, value,
	region_context,
	tps68470_pmic_get_clk,
	ti_tps68470_regmap_update_bits,
	clk_table,
	ARRAY_SIZE(clk_table));
	}

	static acpi_status tps68470_pmic_vrval_handler(u32 function,
	acpi_physical_address address,
	u32 bits, u64 *value,
	void *handler_context,
	void *region_context)
	{
	return tps68470_pmic_common_handler(function, address, bits, value,
	region_context,
	tps68470_pmic_get_vr_val,
	ti_tps68470_regmap_update_bits,
	vr_val_table,
	ARRAY_SIZE(vr_val_table));
	}

	static acpi_status tps68470_pmic_pwr_handler(u32 function,
	acpi_physical_address address,
	u32 bits, u64 *value,
	void *handler_context,
	void *region_context)
	{
	if (bits != 32)
	return AE_BAD_PARAMETER;

	/* set/clear for bit 0, bits 0 and 1 together */
	if (function == ACPI_WRITE &&
	!(value == 0 \|\| value == 1 \|\| *value == 3)) {
	return AE_BAD_PARAMETER;
	}

	return tps68470_pmic_common_handler(function, address, bits, value,
	region_context,
	tps68470_pmic_get_power,
	ti_tps68470_regmap_update_bits,
	power_table,
	ARRAY_SIZE(power_table));
	}

	static int tps68470_pmic_opregion_probe(struct platform_device *pdev)
	{
	struct regmap *tps68470_regmap = dev_get_drvdata(pdev->dev.parent);
	acpi_handle handle = ACPI_HANDLE(pdev->dev.parent);
	struct device *dev = &pdev->dev;
	struct tps68470_pmic_opregion *opregion;
	acpi_status status;

	if (!tps68470_regmap)
	return dev_err_probe(dev, -EINVAL, "regmap is missing\n");

	if (!handle) {
	dev_warn(dev, "acpi handle is NULL\n");
	return -ENODEV;
	}

	opregion = devm_kzalloc(dev, sizeof(*opregion), GFP_KERNEL);
	if (!opregion)
	return -ENOMEM;

	mutex_init(&opregion->lock);
	opregion->regmap = tps68470_regmap;

	status = acpi_install_address_space_handler(handle,
	TI_PMIC_POWER_OPREGION_ID,
	tps68470_pmic_pwr_handler,
	NULL, opregion);
	if (ACPI_FAILURE(status))
	goto out_mutex_destroy;

	status = acpi_install_address_space_handler(handle,
	TI_PMIC_VR_VAL_OPREGION_ID,
	tps68470_pmic_vrval_handler,
	NULL, opregion);
	if (ACPI_FAILURE(status))
	goto out_remove_power_handler;

	status = acpi_install_address_space_handler(handle,
	TI_PMIC_CLOCK_OPREGION_ID,
	tps68470_pmic_clk_handler,
	NULL, opregion);
	if (ACPI_FAILURE(status))
	goto out_remove_vr_val_handler;

	status = acpi_install_address_space_handler(handle,
	TI_PMIC_CLKFREQ_OPREGION_ID,
	tps68470_pmic_cfreq_handler,
	NULL, opregion);
	if (ACPI_FAILURE(status))
	goto out_remove_clk_handler;

	return 0;

	out_remove_clk_handler:
	acpi_remove_address_space_handler(handle, TI_PMIC_CLOCK_OPREGION_ID,
	tps68470_pmic_clk_handler);
	out_remove_vr_val_handler:
	acpi_remove_address_space_handler(handle, TI_PMIC_VR_VAL_OPREGION_ID,
	tps68470_pmic_vrval_handler);
	out_remove_power_handler:
	acpi_remove_address_space_handler(handle, TI_PMIC_POWER_OPREGION_ID,
	tps68470_pmic_pwr_handler);
	out_mutex_destroy:
	mutex_destroy(&opregion->lock);
	return -ENODEV;
	}

	static struct platform_driver tps68470_pmic_opregion_driver = {
	.probe = tps68470_pmic_opregion_probe,
	.driver = {
	.name = "tps68470_pmic_opregion",
	},
	};

	builtin_platform_driver(tps68470_pmic_opregion_driver)