drivers/mfd/da9063-i2c.c - linux - Git at Google

 // SPDX-License-Identifier: GPL-2.0+
 /* I2C support for Dialog DA9063
  *
  * Copyright 2012 Dialog Semiconductor Ltd.
  * Copyright 2013 Philipp Zabel, Pengutronix
  *
  * Author: Krystian Garbaciak, Dialog Semiconductor
  */

 #include <linux/kernel.h>
 #include <linux/module.h>
 #include <linux/i2c.h>
 #include <linux/regmap.h>
 #include <linux/delay.h>
 #include <linux/slab.h>
 #include <linux/err.h>

 #include <linux/mfd/core.h>
 #include <linux/mfd/da9063/core.h>
 #include <linux/mfd/da9063/registers.h>

 #include <linux/of.h>
 #include <linux/regulator/of_regulator.h>

 /*
  * Raw I2C access required for just accessing chip and variant info before we
  * know which device is present. The info read from the device using this
  * approach is then used to select the correct regmap tables.
  */

 #define DA9063_REG_PAGE_SIZE		0x100
 #define DA9063_REG_PAGED_ADDR_MASK	0xFF

 enum da9063_page_sel_buf_fmt {
 	DA9063_PAGE_SEL_BUF_PAGE_REG = 0,
 	DA9063_PAGE_SEL_BUF_PAGE_VAL,
 	DA9063_PAGE_SEL_BUF_SIZE,
 };

 enum da9063_paged_read_msgs {
 	DA9063_PAGED_READ_MSG_PAGE_SEL = 0,
 	DA9063_PAGED_READ_MSG_REG_SEL,
 	DA9063_PAGED_READ_MSG_DATA,
 	DA9063_PAGED_READ_MSG_CNT,
 };

 static int da9063_i2c_blockreg_read(struct i2c_client *client, u16 addr,
 				    u8 *buf, int count)
 {
 	struct i2c_msg xfer[DA9063_PAGED_READ_MSG_CNT];
 	u8 page_sel_buf[DA9063_PAGE_SEL_BUF_SIZE];
 	u8 page_num, paged_addr;
 	int ret;

 	/* Determine page info based on register address */
 	page_num = (addr / DA9063_REG_PAGE_SIZE);
 	if (page_num > 1) {
 		dev_err(&client->dev, "Invalid register address provided\n");
 		return -EINVAL;
 	}

 	paged_addr = (addr % DA9063_REG_PAGE_SIZE) & DA9063_REG_PAGED_ADDR_MASK;
 	page_sel_buf[DA9063_PAGE_SEL_BUF_PAGE_REG] = DA9063_REG_PAGE_CON;
 	page_sel_buf[DA9063_PAGE_SEL_BUF_PAGE_VAL] =
 		(page_num << DA9063_I2C_PAGE_SEL_SHIFT) & DA9063_REG_PAGE_MASK;

 	/* Write reg address, page selection */
 	xfer[DA9063_PAGED_READ_MSG_PAGE_SEL].addr = client->addr;
 	xfer[DA9063_PAGED_READ_MSG_PAGE_SEL].flags = 0;
 	xfer[DA9063_PAGED_READ_MSG_PAGE_SEL].len = DA9063_PAGE_SEL_BUF_SIZE;
 	xfer[DA9063_PAGED_READ_MSG_PAGE_SEL].buf = page_sel_buf;

 	/* Select register address */
 	xfer[DA9063_PAGED_READ_MSG_REG_SEL].addr = client->addr;
 	xfer[DA9063_PAGED_READ_MSG_REG_SEL].flags = 0;
 	xfer[DA9063_PAGED_READ_MSG_REG_SEL].len = sizeof(paged_addr);
 	xfer[DA9063_PAGED_READ_MSG_REG_SEL].buf = &paged_addr;

 	/* Read data */
 	xfer[DA9063_PAGED_READ_MSG_DATA].addr = client->addr;
 	xfer[DA9063_PAGED_READ_MSG_DATA].flags = I2C_M_RD;
 	xfer[DA9063_PAGED_READ_MSG_DATA].len = count;
 	xfer[DA9063_PAGED_READ_MSG_DATA].buf = buf;

 	ret = i2c_transfer(client->adapter, xfer, DA9063_PAGED_READ_MSG_CNT);
 	if (ret < 0) {
 		dev_err(&client->dev, "Paged block read failed: %d\n", ret);
 		return ret;
 	}

 	if (ret != DA9063_PAGED_READ_MSG_CNT) {
 		dev_err(&client->dev, "Paged block read failed to complete\n");
 		return -EIO;
 	}

 	return 0;
 }

 enum {
 	DA9063_DEV_ID_REG = 0,
 	DA9063_VAR_ID_REG,
 	DA9063_CHIP_ID_REGS,
 };

 static int da9063_get_device_type(struct i2c_client *i2c, struct da9063 *da9063)
 {
 	u8 buf[DA9063_CHIP_ID_REGS];
 	int ret;

 	ret = da9063_i2c_blockreg_read(i2c, DA9063_REG_DEVICE_ID, buf,
 				       DA9063_CHIP_ID_REGS);
 	if (ret)
 		return ret;

 	if (buf[DA9063_DEV_ID_REG] != PMIC_CHIP_ID_DA9063) {
 		dev_err(da9063->dev,
 			"Invalid chip device ID: 0x%02x\n",
 			buf[DA9063_DEV_ID_REG]);
 		return -ENODEV;
 	}

 	dev_info(da9063->dev,
 		 "Device detected (chip-ID: 0x%02X, var-ID: 0x%02X)\n",
 		 buf[DA9063_DEV_ID_REG], buf[DA9063_VAR_ID_REG]);

 	da9063->variant_code =
 		(buf[DA9063_VAR_ID_REG] & DA9063_VARIANT_ID_MRC_MASK)
 		>> DA9063_VARIANT_ID_MRC_SHIFT;

 	return 0;
 }

 /*
  * Variant specific regmap configs
  */

 static const struct regmap_range da9063_ad_readable_ranges[] = {
 	regmap_reg_range(DA9063_REG_PAGE_CON, DA9063_AD_REG_SECOND_D),
 	regmap_reg_range(DA9063_REG_SEQ, DA9063_REG_ID_32_31),
 	regmap_reg_range(DA9063_REG_SEQ_A, DA9063_REG_AUTO3_LOW),
 	regmap_reg_range(DA9063_REG_T_OFFSET, DA9063_AD_REG_GP_ID_19),
 	regmap_reg_range(DA9063_REG_DEVICE_ID, DA9063_REG_VARIANT_ID),
 };

 static const struct regmap_range da9063_ad_writeable_ranges[] = {
 	regmap_reg_range(DA9063_REG_PAGE_CON, DA9063_REG_PAGE_CON),
 	regmap_reg_range(DA9063_REG_FAULT_LOG, DA9063_REG_VSYS_MON),
 	regmap_reg_range(DA9063_REG_COUNT_S, DA9063_AD_REG_ALARM_Y),
 	regmap_reg_range(DA9063_REG_SEQ, DA9063_REG_ID_32_31),
 	regmap_reg_range(DA9063_REG_SEQ_A, DA9063_REG_AUTO3_LOW),
 	regmap_reg_range(DA9063_REG_CONFIG_I, DA9063_AD_REG_MON_REG_4),
 	regmap_reg_range(DA9063_AD_REG_GP_ID_0, DA9063_AD_REG_GP_ID_19),
 };

 static const struct regmap_range da9063_ad_volatile_ranges[] = {
 	regmap_reg_range(DA9063_REG_PAGE_CON, DA9063_REG_EVENT_D),
 	regmap_reg_range(DA9063_REG_CONTROL_A, DA9063_REG_CONTROL_B),
 	regmap_reg_range(DA9063_REG_CONTROL_E, DA9063_REG_CONTROL_F),
 	regmap_reg_range(DA9063_REG_BCORE2_CONT, DA9063_REG_LDO11_CONT),
 	regmap_reg_range(DA9063_REG_DVC_1, DA9063_REG_ADC_MAN),
 	regmap_reg_range(DA9063_REG_ADC_RES_L, DA9063_AD_REG_SECOND_D),
 	regmap_reg_range(DA9063_REG_SEQ, DA9063_REG_SEQ),
 	regmap_reg_range(DA9063_REG_EN_32K, DA9063_REG_EN_32K),
 	regmap_reg_range(DA9063_AD_REG_MON_REG_5, DA9063_AD_REG_MON_REG_6),
 };

 static const struct regmap_access_table da9063_ad_readable_table = {
 	.yes_ranges = da9063_ad_readable_ranges,
 	.n_yes_ranges = ARRAY_SIZE(da9063_ad_readable_ranges),
 };

 static const struct regmap_access_table da9063_ad_writeable_table = {
 	.yes_ranges = da9063_ad_writeable_ranges,
 	.n_yes_ranges = ARRAY_SIZE(da9063_ad_writeable_ranges),
 };

 static const struct regmap_access_table da9063_ad_volatile_table = {
 	.yes_ranges = da9063_ad_volatile_ranges,
 	.n_yes_ranges = ARRAY_SIZE(da9063_ad_volatile_ranges),
 };

 static const struct regmap_range da9063_bb_readable_ranges[] = {
 	regmap_reg_range(DA9063_REG_PAGE_CON, DA9063_BB_REG_SECOND_D),
 	regmap_reg_range(DA9063_REG_SEQ, DA9063_REG_ID_32_31),
 	regmap_reg_range(DA9063_REG_SEQ_A, DA9063_REG_AUTO3_LOW),
 	regmap_reg_range(DA9063_REG_T_OFFSET, DA9063_BB_REG_GP_ID_19),
 	regmap_reg_range(DA9063_REG_DEVICE_ID, DA9063_REG_VARIANT_ID),
 };

 static const struct regmap_range da9063_bb_writeable_ranges[] = {
 	regmap_reg_range(DA9063_REG_PAGE_CON, DA9063_REG_PAGE_CON),
 	regmap_reg_range(DA9063_REG_FAULT_LOG, DA9063_REG_VSYS_MON),
 	regmap_reg_range(DA9063_REG_COUNT_S, DA9063_BB_REG_ALARM_Y),
 	regmap_reg_range(DA9063_REG_SEQ, DA9063_REG_ID_32_31),
 	regmap_reg_range(DA9063_REG_SEQ_A, DA9063_REG_AUTO3_LOW),
 	regmap_reg_range(DA9063_REG_CONFIG_I, DA9063_BB_REG_MON_REG_4),
 	regmap_reg_range(DA9063_BB_REG_GP_ID_0, DA9063_BB_REG_GP_ID_19),
 };

 static const struct regmap_range da9063_bb_da_volatile_ranges[] = {
 	regmap_reg_range(DA9063_REG_PAGE_CON, DA9063_REG_EVENT_D),
 	regmap_reg_range(DA9063_REG_CONTROL_A, DA9063_REG_CONTROL_B),
 	regmap_reg_range(DA9063_REG_CONTROL_E, DA9063_REG_CONTROL_F),
 	regmap_reg_range(DA9063_REG_BCORE2_CONT, DA9063_REG_LDO11_CONT),
 	regmap_reg_range(DA9063_REG_DVC_1, DA9063_REG_ADC_MAN),
 	regmap_reg_range(DA9063_REG_ADC_RES_L, DA9063_BB_REG_SECOND_D),
 	regmap_reg_range(DA9063_REG_SEQ, DA9063_REG_SEQ),
 	regmap_reg_range(DA9063_REG_EN_32K, DA9063_REG_EN_32K),
 	regmap_reg_range(DA9063_BB_REG_MON_REG_5, DA9063_BB_REG_MON_REG_6),
 };

 static const struct regmap_access_table da9063_bb_readable_table = {
 	.yes_ranges = da9063_bb_readable_ranges,
 	.n_yes_ranges = ARRAY_SIZE(da9063_bb_readable_ranges),
 };

 static const struct regmap_access_table da9063_bb_writeable_table = {
 	.yes_ranges = da9063_bb_writeable_ranges,
 	.n_yes_ranges = ARRAY_SIZE(da9063_bb_writeable_ranges),
 };

 static const struct regmap_access_table da9063_bb_da_volatile_table = {
 	.yes_ranges = da9063_bb_da_volatile_ranges,
 	.n_yes_ranges = ARRAY_SIZE(da9063_bb_da_volatile_ranges),
 };

 static const struct regmap_range da9063l_bb_readable_ranges[] = {
 	regmap_reg_range(DA9063_REG_PAGE_CON, DA9063_REG_MON_A10_RES),
 	regmap_reg_range(DA9063_REG_SEQ, DA9063_REG_ID_32_31),
 	regmap_reg_range(DA9063_REG_SEQ_A, DA9063_REG_AUTO3_LOW),
 	regmap_reg_range(DA9063_REG_T_OFFSET, DA9063_BB_REG_GP_ID_19),
 	regmap_reg_range(DA9063_REG_DEVICE_ID, DA9063_REG_VARIANT_ID),
 };

 static const struct regmap_range da9063l_bb_writeable_ranges[] = {
 	regmap_reg_range(DA9063_REG_PAGE_CON, DA9063_REG_PAGE_CON),
 	regmap_reg_range(DA9063_REG_FAULT_LOG, DA9063_REG_VSYS_MON),
 	regmap_reg_range(DA9063_REG_SEQ, DA9063_REG_ID_32_31),
 	regmap_reg_range(DA9063_REG_SEQ_A, DA9063_REG_AUTO3_LOW),
 	regmap_reg_range(DA9063_REG_CONFIG_I, DA9063_BB_REG_MON_REG_4),
 	regmap_reg_range(DA9063_BB_REG_GP_ID_0, DA9063_BB_REG_GP_ID_19),
 };

 static const struct regmap_range da9063l_bb_da_volatile_ranges[] = {
 	regmap_reg_range(DA9063_REG_PAGE_CON, DA9063_REG_EVENT_D),
 	regmap_reg_range(DA9063_REG_CONTROL_A, DA9063_REG_CONTROL_B),
 	regmap_reg_range(DA9063_REG_CONTROL_E, DA9063_REG_CONTROL_F),
 	regmap_reg_range(DA9063_REG_BCORE2_CONT, DA9063_REG_LDO11_CONT),
 	regmap_reg_range(DA9063_REG_DVC_1, DA9063_REG_ADC_MAN),
 	regmap_reg_range(DA9063_REG_ADC_RES_L, DA9063_REG_MON_A10_RES),
 	regmap_reg_range(DA9063_REG_SEQ, DA9063_REG_SEQ),
 	regmap_reg_range(DA9063_REG_EN_32K, DA9063_REG_EN_32K),
 	regmap_reg_range(DA9063_BB_REG_MON_REG_5, DA9063_BB_REG_MON_REG_6),
 };

 static const struct regmap_access_table da9063l_bb_readable_table = {
 	.yes_ranges = da9063l_bb_readable_ranges,
 	.n_yes_ranges = ARRAY_SIZE(da9063l_bb_readable_ranges),
 };

 static const struct regmap_access_table da9063l_bb_writeable_table = {
 	.yes_ranges = da9063l_bb_writeable_ranges,
 	.n_yes_ranges = ARRAY_SIZE(da9063l_bb_writeable_ranges),
 };

 static const struct regmap_access_table da9063l_bb_da_volatile_table = {
 	.yes_ranges = da9063l_bb_da_volatile_ranges,
 	.n_yes_ranges = ARRAY_SIZE(da9063l_bb_da_volatile_ranges),
 };

 static const struct regmap_range da9063_da_readable_ranges[] = {
 	regmap_reg_range(DA9063_REG_PAGE_CON, DA9063_BB_REG_SECOND_D),
 	regmap_reg_range(DA9063_REG_SEQ, DA9063_REG_ID_32_31),
 	regmap_reg_range(DA9063_REG_SEQ_A, DA9063_REG_AUTO3_LOW),
 	regmap_reg_range(DA9063_REG_T_OFFSET, DA9063_BB_REG_GP_ID_11),
 	regmap_reg_range(DA9063_REG_DEVICE_ID, DA9063_REG_VARIANT_ID),
 };

 static const struct regmap_range da9063_da_writeable_ranges[] = {
 	regmap_reg_range(DA9063_REG_PAGE_CON, DA9063_REG_PAGE_CON),
 	regmap_reg_range(DA9063_REG_FAULT_LOG, DA9063_REG_VSYS_MON),
 	regmap_reg_range(DA9063_REG_COUNT_S, DA9063_BB_REG_ALARM_Y),
 	regmap_reg_range(DA9063_REG_SEQ, DA9063_REG_ID_32_31),
 	regmap_reg_range(DA9063_REG_SEQ_A, DA9063_REG_AUTO3_LOW),
 	regmap_reg_range(DA9063_REG_CONFIG_I, DA9063_BB_REG_MON_REG_4),
 	regmap_reg_range(DA9063_BB_REG_GP_ID_0, DA9063_BB_REG_GP_ID_11),
 };

 static const struct regmap_access_table da9063_da_readable_table = {
 	.yes_ranges = da9063_da_readable_ranges,
 	.n_yes_ranges = ARRAY_SIZE(da9063_da_readable_ranges),
 };

 static const struct regmap_access_table da9063_da_writeable_table = {
 	.yes_ranges = da9063_da_writeable_ranges,
 	.n_yes_ranges = ARRAY_SIZE(da9063_da_writeable_ranges),
 };

 static const struct regmap_range da9063l_da_readable_ranges[] = {
 	regmap_reg_range(DA9063_REG_PAGE_CON, DA9063_REG_MON_A10_RES),
 	regmap_reg_range(DA9063_REG_SEQ, DA9063_REG_ID_32_31),
 	regmap_reg_range(DA9063_REG_SEQ_A, DA9063_REG_AUTO3_LOW),
 	regmap_reg_range(DA9063_REG_T_OFFSET, DA9063_BB_REG_GP_ID_11),
 	regmap_reg_range(DA9063_REG_DEVICE_ID, DA9063_REG_VARIANT_ID),
 };

 static const struct regmap_range da9063l_da_writeable_ranges[] = {
 	regmap_reg_range(DA9063_REG_PAGE_CON, DA9063_REG_PAGE_CON),
 	regmap_reg_range(DA9063_REG_FAULT_LOG, DA9063_REG_VSYS_MON),
 	regmap_reg_range(DA9063_REG_SEQ, DA9063_REG_ID_32_31),
 	regmap_reg_range(DA9063_REG_SEQ_A, DA9063_REG_AUTO3_LOW),
 	regmap_reg_range(DA9063_REG_CONFIG_I, DA9063_BB_REG_MON_REG_4),
 	regmap_reg_range(DA9063_BB_REG_GP_ID_0, DA9063_BB_REG_GP_ID_11),
 };

 static const struct regmap_access_table da9063l_da_readable_table = {
 	.yes_ranges = da9063l_da_readable_ranges,
 	.n_yes_ranges = ARRAY_SIZE(da9063l_da_readable_ranges),
 };

 static const struct regmap_access_table da9063l_da_writeable_table = {
 	.yes_ranges = da9063l_da_writeable_ranges,
 	.n_yes_ranges = ARRAY_SIZE(da9063l_da_writeable_ranges),
 };

 static const struct regmap_range_cfg da9063_range_cfg[] = {
 	{
 		.range_min = DA9063_REG_PAGE_CON,
 		.range_max = DA9063_REG_CONFIG_ID,
 		.selector_reg = DA9063_REG_PAGE_CON,
 		.selector_mask = 1 << DA9063_I2C_PAGE_SEL_SHIFT,
 		.selector_shift = DA9063_I2C_PAGE_SEL_SHIFT,
 		.window_start = 0,
 		.window_len = 256,
 	}
 };

 static struct regmap_config da9063_regmap_config = {
 	.reg_bits = 8,
 	.val_bits = 8,
 	.ranges = da9063_range_cfg,
 	.num_ranges = ARRAY_SIZE(da9063_range_cfg),
 	.max_register = DA9063_REG_CONFIG_ID,

 	.cache_type = REGCACHE_RBTREE,
 };

 static const struct of_device_id da9063_dt_ids[] = {
 	{ .compatible = "dlg,da9063", },
 	{ .compatible = "dlg,da9063l", },
 	{ }
 };
 MODULE_DEVICE_TABLE(of, da9063_dt_ids);
 static int da9063_i2c_probe(struct i2c_client *i2c,
 			    const struct i2c_device_id *id)
 {
 	struct da9063 *da9063;
 	int ret;

 	da9063 = devm_kzalloc(&i2c->dev, sizeof(struct da9063), GFP_KERNEL);
 	if (da9063 == NULL)
 		return -ENOMEM;

 	i2c_set_clientdata(i2c, da9063);
 	da9063->dev = &i2c->dev;
 	da9063->chip_irq = i2c->irq;
 	da9063->type = id->driver_data;

 	ret = da9063_get_device_type(i2c, da9063);
 	if (ret)
 		return ret;

 	switch (da9063->type) {
 	case PMIC_TYPE_DA9063:
 		switch (da9063->variant_code) {
 		case PMIC_DA9063_AD:
 			da9063_regmap_config.rd_table =
 				&da9063_ad_readable_table;
 			da9063_regmap_config.wr_table =
 				&da9063_ad_writeable_table;
 			da9063_regmap_config.volatile_table =
 				&da9063_ad_volatile_table;
 			break;
 		case PMIC_DA9063_BB:
 		case PMIC_DA9063_CA:
 			da9063_regmap_config.rd_table =
 				&da9063_bb_readable_table;
 			da9063_regmap_config.wr_table =
 				&da9063_bb_writeable_table;
 			da9063_regmap_config.volatile_table =
 				&da9063_bb_da_volatile_table;
 			break;
 		case PMIC_DA9063_DA:
 		case PMIC_DA9063_EA:
 			da9063_regmap_config.rd_table =
 				&da9063_da_readable_table;
 			da9063_regmap_config.wr_table =
 				&da9063_da_writeable_table;
 			da9063_regmap_config.volatile_table =
 				&da9063_bb_da_volatile_table;
 			break;
 		default:
 			dev_err(da9063->dev,
 				"Chip variant not supported for DA9063\n");
 			return -ENODEV;
 		}
 		break;
 	case PMIC_TYPE_DA9063L:
 		switch (da9063->variant_code) {
 		case PMIC_DA9063_BB:
 		case PMIC_DA9063_CA:
 			da9063_regmap_config.rd_table =
 				&da9063l_bb_readable_table;
 			da9063_regmap_config.wr_table =
 				&da9063l_bb_writeable_table;
 			da9063_regmap_config.volatile_table =
 				&da9063l_bb_da_volatile_table;
 			break;
 		case PMIC_DA9063_DA:
 		case PMIC_DA9063_EA:
 			da9063_regmap_config.rd_table =
 				&da9063l_da_readable_table;
 			da9063_regmap_config.wr_table =
 				&da9063l_da_writeable_table;
 			da9063_regmap_config.volatile_table =
 				&da9063l_bb_da_volatile_table;
 			break;
 		default:
 			dev_err(da9063->dev,
 				"Chip variant not supported for DA9063L\n");
 			return -ENODEV;
 		}
 		break;
 	default:
 		dev_err(da9063->dev, "Chip type not supported\n");
 		return -ENODEV;
 	}

 	da9063->regmap = devm_regmap_init_i2c(i2c, &da9063_regmap_config);
 	if (IS_ERR(da9063->regmap)) {
 		ret = PTR_ERR(da9063->regmap);
 		dev_err(da9063->dev, "Failed to allocate register map: %d\n",
 			ret);
 		return ret;
 	}

 	/* If SMBus is not available and only I2C is possible, enter I2C mode */
 	if (i2c_check_functionality(i2c->adapter, I2C_FUNC_I2C)) {
 		ret = regmap_clear_bits(da9063->regmap, DA9063_REG_CONFIG_J,
 					DA9063_TWOWIRE_TO);
 		if (ret < 0) {
 			dev_err(da9063->dev, "Failed to set Two-Wire Bus Mode.\n");
 			return ret;
 		}
 	}

 	return da9063_device_init(da9063, i2c->irq);
 }

 static const struct i2c_device_id da9063_i2c_id[] = {
 	{ "da9063", PMIC_TYPE_DA9063 },
 	{ "da9063l", PMIC_TYPE_DA9063L },
 	{},
 };
 MODULE_DEVICE_TABLE(i2c, da9063_i2c_id);

 static struct i2c_driver da9063_i2c_driver = {
 	.driver = {
 		.name = "da9063",
 		.of_match_table = da9063_dt_ids,
 	},
 	.probe    = da9063_i2c_probe,
 	.id_table = da9063_i2c_id,
 };

 module_i2c_driver(da9063_i2c_driver);
	// SPDX-License-Identifier: GPL-2.0+
	/* I2C support for Dialog DA9063
	*
	* Copyright 2012 Dialog Semiconductor Ltd.
	* Copyright 2013 Philipp Zabel, Pengutronix
	*
	* Author: Krystian Garbaciak, Dialog Semiconductor
	*/

	#include <linux/kernel.h>
	#include <linux/module.h>
	#include <linux/i2c.h>
	#include <linux/regmap.h>
	#include <linux/delay.h>
	#include <linux/slab.h>
	#include <linux/err.h>

	#include <linux/mfd/core.h>
	#include <linux/mfd/da9063/core.h>
	#include <linux/mfd/da9063/registers.h>

	#include <linux/of.h>
	#include <linux/regulator/of_regulator.h>

	/*
	* Raw I2C access required for just accessing chip and variant info before we
	* know which device is present. The info read from the device using this
	* approach is then used to select the correct regmap tables.
	*/

	#define DA9063_REG_PAGE_SIZE 0x100
	#define DA9063_REG_PAGED_ADDR_MASK 0xFF

	enum da9063_page_sel_buf_fmt {
	DA9063_PAGE_SEL_BUF_PAGE_REG = 0,
	DA9063_PAGE_SEL_BUF_PAGE_VAL,
	DA9063_PAGE_SEL_BUF_SIZE,
	};

	enum da9063_paged_read_msgs {
	DA9063_PAGED_READ_MSG_PAGE_SEL = 0,
	DA9063_PAGED_READ_MSG_REG_SEL,
	DA9063_PAGED_READ_MSG_DATA,
	DA9063_PAGED_READ_MSG_CNT,
	};

	static int da9063_i2c_blockreg_read(struct i2c_client *client, u16 addr,
	u8 *buf, int count)
	{
	struct i2c_msg xfer[DA9063_PAGED_READ_MSG_CNT];
	u8 page_sel_buf[DA9063_PAGE_SEL_BUF_SIZE];
	u8 page_num, paged_addr;
	int ret;

	/* Determine page info based on register address */
	page_num = (addr / DA9063_REG_PAGE_SIZE);
	if (page_num > 1) {
	dev_err(&client->dev, "Invalid register address provided\n");
	return -EINVAL;
	}

	paged_addr = (addr % DA9063_REG_PAGE_SIZE) & DA9063_REG_PAGED_ADDR_MASK;
	page_sel_buf[DA9063_PAGE_SEL_BUF_PAGE_REG] = DA9063_REG_PAGE_CON;
	page_sel_buf[DA9063_PAGE_SEL_BUF_PAGE_VAL] =
	(page_num << DA9063_I2C_PAGE_SEL_SHIFT) & DA9063_REG_PAGE_MASK;

	/* Write reg address, page selection */
	xfer[DA9063_PAGED_READ_MSG_PAGE_SEL].addr = client->addr;
	xfer[DA9063_PAGED_READ_MSG_PAGE_SEL].flags = 0;
	xfer[DA9063_PAGED_READ_MSG_PAGE_SEL].len = DA9063_PAGE_SEL_BUF_SIZE;
	xfer[DA9063_PAGED_READ_MSG_PAGE_SEL].buf = page_sel_buf;

	/* Select register address */
	xfer[DA9063_PAGED_READ_MSG_REG_SEL].addr = client->addr;
	xfer[DA9063_PAGED_READ_MSG_REG_SEL].flags = 0;
	xfer[DA9063_PAGED_READ_MSG_REG_SEL].len = sizeof(paged_addr);
	xfer[DA9063_PAGED_READ_MSG_REG_SEL].buf = &paged_addr;

	/* Read data */
	xfer[DA9063_PAGED_READ_MSG_DATA].addr = client->addr;
	xfer[DA9063_PAGED_READ_MSG_DATA].flags = I2C_M_RD;
	xfer[DA9063_PAGED_READ_MSG_DATA].len = count;
	xfer[DA9063_PAGED_READ_MSG_DATA].buf = buf;

	ret = i2c_transfer(client->adapter, xfer, DA9063_PAGED_READ_MSG_CNT);
	if (ret < 0) {
	dev_err(&client->dev, "Paged block read failed: %d\n", ret);
	return ret;
	}

	if (ret != DA9063_PAGED_READ_MSG_CNT) {
	dev_err(&client->dev, "Paged block read failed to complete\n");
	return -EIO;
	}

	return 0;
	}

	enum {
	DA9063_DEV_ID_REG = 0,
	DA9063_VAR_ID_REG,
	DA9063_CHIP_ID_REGS,
	};

	static int da9063_get_device_type(struct i2c_client i2c, struct da9063 da9063)
	{
	u8 buf[DA9063_CHIP_ID_REGS];
	int ret;

	ret = da9063_i2c_blockreg_read(i2c, DA9063_REG_DEVICE_ID, buf,
	DA9063_CHIP_ID_REGS);
	if (ret)
	return ret;

	if (buf[DA9063_DEV_ID_REG] != PMIC_CHIP_ID_DA9063) {
	dev_err(da9063->dev,
	"Invalid chip device ID: 0x%02x\n",
	buf[DA9063_DEV_ID_REG]);
	return -ENODEV;
	}

	dev_info(da9063->dev,
	"Device detected (chip-ID: 0x%02X, var-ID: 0x%02X)\n",
	buf[DA9063_DEV_ID_REG], buf[DA9063_VAR_ID_REG]);

	da9063->variant_code =
	(buf[DA9063_VAR_ID_REG] & DA9063_VARIANT_ID_MRC_MASK)
	>> DA9063_VARIANT_ID_MRC_SHIFT;

	return 0;
	}

	/*
	* Variant specific regmap configs
	*/

	static const struct regmap_range da9063_ad_readable_ranges[] = {
	regmap_reg_range(DA9063_REG_PAGE_CON, DA9063_AD_REG_SECOND_D),
	regmap_reg_range(DA9063_REG_SEQ, DA9063_REG_ID_32_31),
	regmap_reg_range(DA9063_REG_SEQ_A, DA9063_REG_AUTO3_LOW),
	regmap_reg_range(DA9063_REG_T_OFFSET, DA9063_AD_REG_GP_ID_19),
	regmap_reg_range(DA9063_REG_DEVICE_ID, DA9063_REG_VARIANT_ID),
	};

	static const struct regmap_range da9063_ad_writeable_ranges[] = {
	regmap_reg_range(DA9063_REG_PAGE_CON, DA9063_REG_PAGE_CON),
	regmap_reg_range(DA9063_REG_FAULT_LOG, DA9063_REG_VSYS_MON),
	regmap_reg_range(DA9063_REG_COUNT_S, DA9063_AD_REG_ALARM_Y),
	regmap_reg_range(DA9063_REG_SEQ, DA9063_REG_ID_32_31),
	regmap_reg_range(DA9063_REG_SEQ_A, DA9063_REG_AUTO3_LOW),
	regmap_reg_range(DA9063_REG_CONFIG_I, DA9063_AD_REG_MON_REG_4),
	regmap_reg_range(DA9063_AD_REG_GP_ID_0, DA9063_AD_REG_GP_ID_19),
	};

	static const struct regmap_range da9063_ad_volatile_ranges[] = {
	regmap_reg_range(DA9063_REG_PAGE_CON, DA9063_REG_EVENT_D),
	regmap_reg_range(DA9063_REG_CONTROL_A, DA9063_REG_CONTROL_B),
	regmap_reg_range(DA9063_REG_CONTROL_E, DA9063_REG_CONTROL_F),
	regmap_reg_range(DA9063_REG_BCORE2_CONT, DA9063_REG_LDO11_CONT),
	regmap_reg_range(DA9063_REG_DVC_1, DA9063_REG_ADC_MAN),
	regmap_reg_range(DA9063_REG_ADC_RES_L, DA9063_AD_REG_SECOND_D),
	regmap_reg_range(DA9063_REG_SEQ, DA9063_REG_SEQ),
	regmap_reg_range(DA9063_REG_EN_32K, DA9063_REG_EN_32K),
	regmap_reg_range(DA9063_AD_REG_MON_REG_5, DA9063_AD_REG_MON_REG_6),
	};

	static const struct regmap_access_table da9063_ad_readable_table = {
	.yes_ranges = da9063_ad_readable_ranges,
	.n_yes_ranges = ARRAY_SIZE(da9063_ad_readable_ranges),
	};

	static const struct regmap_access_table da9063_ad_writeable_table = {
	.yes_ranges = da9063_ad_writeable_ranges,
	.n_yes_ranges = ARRAY_SIZE(da9063_ad_writeable_ranges),
	};

	static const struct regmap_access_table da9063_ad_volatile_table = {
	.yes_ranges = da9063_ad_volatile_ranges,
	.n_yes_ranges = ARRAY_SIZE(da9063_ad_volatile_ranges),
	};

	static const struct regmap_range da9063_bb_readable_ranges[] = {
	regmap_reg_range(DA9063_REG_PAGE_CON, DA9063_BB_REG_SECOND_D),
	regmap_reg_range(DA9063_REG_SEQ, DA9063_REG_ID_32_31),
	regmap_reg_range(DA9063_REG_SEQ_A, DA9063_REG_AUTO3_LOW),
	regmap_reg_range(DA9063_REG_T_OFFSET, DA9063_BB_REG_GP_ID_19),
	regmap_reg_range(DA9063_REG_DEVICE_ID, DA9063_REG_VARIANT_ID),
	};

	static const struct regmap_range da9063_bb_writeable_ranges[] = {
	regmap_reg_range(DA9063_REG_PAGE_CON, DA9063_REG_PAGE_CON),
	regmap_reg_range(DA9063_REG_FAULT_LOG, DA9063_REG_VSYS_MON),
	regmap_reg_range(DA9063_REG_COUNT_S, DA9063_BB_REG_ALARM_Y),
	regmap_reg_range(DA9063_REG_SEQ, DA9063_REG_ID_32_31),
	regmap_reg_range(DA9063_REG_SEQ_A, DA9063_REG_AUTO3_LOW),
	regmap_reg_range(DA9063_REG_CONFIG_I, DA9063_BB_REG_MON_REG_4),
	regmap_reg_range(DA9063_BB_REG_GP_ID_0, DA9063_BB_REG_GP_ID_19),
	};

	static const struct regmap_range da9063_bb_da_volatile_ranges[] = {
	regmap_reg_range(DA9063_REG_PAGE_CON, DA9063_REG_EVENT_D),
	regmap_reg_range(DA9063_REG_CONTROL_A, DA9063_REG_CONTROL_B),
	regmap_reg_range(DA9063_REG_CONTROL_E, DA9063_REG_CONTROL_F),
	regmap_reg_range(DA9063_REG_BCORE2_CONT, DA9063_REG_LDO11_CONT),
	regmap_reg_range(DA9063_REG_DVC_1, DA9063_REG_ADC_MAN),
	regmap_reg_range(DA9063_REG_ADC_RES_L, DA9063_BB_REG_SECOND_D),
	regmap_reg_range(DA9063_REG_SEQ, DA9063_REG_SEQ),
	regmap_reg_range(DA9063_REG_EN_32K, DA9063_REG_EN_32K),
	regmap_reg_range(DA9063_BB_REG_MON_REG_5, DA9063_BB_REG_MON_REG_6),
	};

	static const struct regmap_access_table da9063_bb_readable_table = {
	.yes_ranges = da9063_bb_readable_ranges,
	.n_yes_ranges = ARRAY_SIZE(da9063_bb_readable_ranges),
	};

	static const struct regmap_access_table da9063_bb_writeable_table = {
	.yes_ranges = da9063_bb_writeable_ranges,
	.n_yes_ranges = ARRAY_SIZE(da9063_bb_writeable_ranges),
	};

	static const struct regmap_access_table da9063_bb_da_volatile_table = {
	.yes_ranges = da9063_bb_da_volatile_ranges,
	.n_yes_ranges = ARRAY_SIZE(da9063_bb_da_volatile_ranges),
	};

	static const struct regmap_range da9063l_bb_readable_ranges[] = {
	regmap_reg_range(DA9063_REG_PAGE_CON, DA9063_REG_MON_A10_RES),
	regmap_reg_range(DA9063_REG_SEQ, DA9063_REG_ID_32_31),
	regmap_reg_range(DA9063_REG_SEQ_A, DA9063_REG_AUTO3_LOW),
	regmap_reg_range(DA9063_REG_T_OFFSET, DA9063_BB_REG_GP_ID_19),
	regmap_reg_range(DA9063_REG_DEVICE_ID, DA9063_REG_VARIANT_ID),
	};

	static const struct regmap_range da9063l_bb_writeable_ranges[] = {
	regmap_reg_range(DA9063_REG_PAGE_CON, DA9063_REG_PAGE_CON),
	regmap_reg_range(DA9063_REG_FAULT_LOG, DA9063_REG_VSYS_MON),
	regmap_reg_range(DA9063_REG_SEQ, DA9063_REG_ID_32_31),
	regmap_reg_range(DA9063_REG_SEQ_A, DA9063_REG_AUTO3_LOW),
	regmap_reg_range(DA9063_REG_CONFIG_I, DA9063_BB_REG_MON_REG_4),
	regmap_reg_range(DA9063_BB_REG_GP_ID_0, DA9063_BB_REG_GP_ID_19),
	};

	static const struct regmap_range da9063l_bb_da_volatile_ranges[] = {
	regmap_reg_range(DA9063_REG_PAGE_CON, DA9063_REG_EVENT_D),
	regmap_reg_range(DA9063_REG_CONTROL_A, DA9063_REG_CONTROL_B),
	regmap_reg_range(DA9063_REG_CONTROL_E, DA9063_REG_CONTROL_F),
	regmap_reg_range(DA9063_REG_BCORE2_CONT, DA9063_REG_LDO11_CONT),
	regmap_reg_range(DA9063_REG_DVC_1, DA9063_REG_ADC_MAN),
	regmap_reg_range(DA9063_REG_ADC_RES_L, DA9063_REG_MON_A10_RES),
	regmap_reg_range(DA9063_REG_SEQ, DA9063_REG_SEQ),
	regmap_reg_range(DA9063_REG_EN_32K, DA9063_REG_EN_32K),
	regmap_reg_range(DA9063_BB_REG_MON_REG_5, DA9063_BB_REG_MON_REG_6),
	};

	static const struct regmap_access_table da9063l_bb_readable_table = {
	.yes_ranges = da9063l_bb_readable_ranges,
	.n_yes_ranges = ARRAY_SIZE(da9063l_bb_readable_ranges),
	};

	static const struct regmap_access_table da9063l_bb_writeable_table = {
	.yes_ranges = da9063l_bb_writeable_ranges,
	.n_yes_ranges = ARRAY_SIZE(da9063l_bb_writeable_ranges),
	};

	static const struct regmap_access_table da9063l_bb_da_volatile_table = {
	.yes_ranges = da9063l_bb_da_volatile_ranges,
	.n_yes_ranges = ARRAY_SIZE(da9063l_bb_da_volatile_ranges),
	};

	static const struct regmap_range da9063_da_readable_ranges[] = {
	regmap_reg_range(DA9063_REG_PAGE_CON, DA9063_BB_REG_SECOND_D),
	regmap_reg_range(DA9063_REG_SEQ, DA9063_REG_ID_32_31),
	regmap_reg_range(DA9063_REG_SEQ_A, DA9063_REG_AUTO3_LOW),
	regmap_reg_range(DA9063_REG_T_OFFSET, DA9063_BB_REG_GP_ID_11),
	regmap_reg_range(DA9063_REG_DEVICE_ID, DA9063_REG_VARIANT_ID),
	};

	static const struct regmap_range da9063_da_writeable_ranges[] = {
	regmap_reg_range(DA9063_REG_PAGE_CON, DA9063_REG_PAGE_CON),
	regmap_reg_range(DA9063_REG_FAULT_LOG, DA9063_REG_VSYS_MON),
	regmap_reg_range(DA9063_REG_COUNT_S, DA9063_BB_REG_ALARM_Y),
	regmap_reg_range(DA9063_REG_SEQ, DA9063_REG_ID_32_31),
	regmap_reg_range(DA9063_REG_SEQ_A, DA9063_REG_AUTO3_LOW),
	regmap_reg_range(DA9063_REG_CONFIG_I, DA9063_BB_REG_MON_REG_4),
	regmap_reg_range(DA9063_BB_REG_GP_ID_0, DA9063_BB_REG_GP_ID_11),
	};

	static const struct regmap_access_table da9063_da_readable_table = {
	.yes_ranges = da9063_da_readable_ranges,
	.n_yes_ranges = ARRAY_SIZE(da9063_da_readable_ranges),
	};

	static const struct regmap_access_table da9063_da_writeable_table = {
	.yes_ranges = da9063_da_writeable_ranges,
	.n_yes_ranges = ARRAY_SIZE(da9063_da_writeable_ranges),
	};

	static const struct regmap_range da9063l_da_readable_ranges[] = {
	regmap_reg_range(DA9063_REG_PAGE_CON, DA9063_REG_MON_A10_RES),
	regmap_reg_range(DA9063_REG_SEQ, DA9063_REG_ID_32_31),
	regmap_reg_range(DA9063_REG_SEQ_A, DA9063_REG_AUTO3_LOW),
	regmap_reg_range(DA9063_REG_T_OFFSET, DA9063_BB_REG_GP_ID_11),
	regmap_reg_range(DA9063_REG_DEVICE_ID, DA9063_REG_VARIANT_ID),
	};

	static const struct regmap_range da9063l_da_writeable_ranges[] = {
	regmap_reg_range(DA9063_REG_PAGE_CON, DA9063_REG_PAGE_CON),
	regmap_reg_range(DA9063_REG_FAULT_LOG, DA9063_REG_VSYS_MON),
	regmap_reg_range(DA9063_REG_SEQ, DA9063_REG_ID_32_31),
	regmap_reg_range(DA9063_REG_SEQ_A, DA9063_REG_AUTO3_LOW),
	regmap_reg_range(DA9063_REG_CONFIG_I, DA9063_BB_REG_MON_REG_4),
	regmap_reg_range(DA9063_BB_REG_GP_ID_0, DA9063_BB_REG_GP_ID_11),
	};

	static const struct regmap_access_table da9063l_da_readable_table = {
	.yes_ranges = da9063l_da_readable_ranges,
	.n_yes_ranges = ARRAY_SIZE(da9063l_da_readable_ranges),
	};

	static const struct regmap_access_table da9063l_da_writeable_table = {
	.yes_ranges = da9063l_da_writeable_ranges,
	.n_yes_ranges = ARRAY_SIZE(da9063l_da_writeable_ranges),
	};

	static const struct regmap_range_cfg da9063_range_cfg[] = {
	{
	.range_min = DA9063_REG_PAGE_CON,
	.range_max = DA9063_REG_CONFIG_ID,
	.selector_reg = DA9063_REG_PAGE_CON,
	.selector_mask = 1 << DA9063_I2C_PAGE_SEL_SHIFT,
	.selector_shift = DA9063_I2C_PAGE_SEL_SHIFT,
	.window_start = 0,
	.window_len = 256,
	}
	};

	static struct regmap_config da9063_regmap_config = {
	.reg_bits = 8,
	.val_bits = 8,
	.ranges = da9063_range_cfg,
	.num_ranges = ARRAY_SIZE(da9063_range_cfg),
	.max_register = DA9063_REG_CONFIG_ID,

	.cache_type = REGCACHE_RBTREE,
	};

	static const struct of_device_id da9063_dt_ids[] = {
	{ .compatible = "dlg,da9063", },
	{ .compatible = "dlg,da9063l", },
	{ }
	};
	MODULE_DEVICE_TABLE(of, da9063_dt_ids);
	static int da9063_i2c_probe(struct i2c_client *i2c,
	const struct i2c_device_id *id)
	{
	struct da9063 *da9063;
	int ret;

	da9063 = devm_kzalloc(&i2c->dev, sizeof(struct da9063), GFP_KERNEL);
	if (da9063 == NULL)
	return -ENOMEM;

	i2c_set_clientdata(i2c, da9063);
	da9063->dev = &i2c->dev;
	da9063->chip_irq = i2c->irq;
	da9063->type = id->driver_data;

	ret = da9063_get_device_type(i2c, da9063);
	if (ret)
	return ret;

	switch (da9063->type) {
	case PMIC_TYPE_DA9063:
	switch (da9063->variant_code) {
	case PMIC_DA9063_AD:
	da9063_regmap_config.rd_table =
	&da9063_ad_readable_table;
	da9063_regmap_config.wr_table =
	&da9063_ad_writeable_table;
	da9063_regmap_config.volatile_table =
	&da9063_ad_volatile_table;
	break;
	case PMIC_DA9063_BB:
	case PMIC_DA9063_CA:
	da9063_regmap_config.rd_table =
	&da9063_bb_readable_table;
	da9063_regmap_config.wr_table =
	&da9063_bb_writeable_table;
	da9063_regmap_config.volatile_table =
	&da9063_bb_da_volatile_table;
	break;
	case PMIC_DA9063_DA:
	case PMIC_DA9063_EA:
	da9063_regmap_config.rd_table =
	&da9063_da_readable_table;
	da9063_regmap_config.wr_table =
	&da9063_da_writeable_table;
	da9063_regmap_config.volatile_table =
	&da9063_bb_da_volatile_table;
	break;
	default:
	dev_err(da9063->dev,
	"Chip variant not supported for DA9063\n");
	return -ENODEV;
	}
	break;
	case PMIC_TYPE_DA9063L:
	switch (da9063->variant_code) {
	case PMIC_DA9063_BB:
	case PMIC_DA9063_CA:
	da9063_regmap_config.rd_table =
	&da9063l_bb_readable_table;
	da9063_regmap_config.wr_table =
	&da9063l_bb_writeable_table;
	da9063_regmap_config.volatile_table =
	&da9063l_bb_da_volatile_table;
	break;
	case PMIC_DA9063_DA:
	case PMIC_DA9063_EA:
	da9063_regmap_config.rd_table =
	&da9063l_da_readable_table;
	da9063_regmap_config.wr_table =
	&da9063l_da_writeable_table;
	da9063_regmap_config.volatile_table =
	&da9063l_bb_da_volatile_table;
	break;
	default:
	dev_err(da9063->dev,
	"Chip variant not supported for DA9063L\n");
	return -ENODEV;
	}
	break;
	default:
	dev_err(da9063->dev, "Chip type not supported\n");
	return -ENODEV;
	}

	da9063->regmap = devm_regmap_init_i2c(i2c, &da9063_regmap_config);
	if (IS_ERR(da9063->regmap)) {
	ret = PTR_ERR(da9063->regmap);
	dev_err(da9063->dev, "Failed to allocate register map: %d\n",
	ret);
	return ret;
	}

	/* If SMBus is not available and only I2C is possible, enter I2C mode */
	if (i2c_check_functionality(i2c->adapter, I2C_FUNC_I2C)) {
	ret = regmap_clear_bits(da9063->regmap, DA9063_REG_CONFIG_J,
	DA9063_TWOWIRE_TO);
	if (ret < 0) {
	dev_err(da9063->dev, "Failed to set Two-Wire Bus Mode.\n");
	return ret;
	}
	}

	return da9063_device_init(da9063, i2c->irq);
	}

	static const struct i2c_device_id da9063_i2c_id[] = {
	{ "da9063", PMIC_TYPE_DA9063 },
	{ "da9063l", PMIC_TYPE_DA9063L },
	{},
	};
	MODULE_DEVICE_TABLE(i2c, da9063_i2c_id);

	static struct i2c_driver da9063_i2c_driver = {
	.driver = {
	.name = "da9063",
	.of_match_table = da9063_dt_ids,
	},
	.probe = da9063_i2c_probe,
	.id_table = da9063_i2c_id,
	};

	module_i2c_driver(da9063_i2c_driver);