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474 lines
16 KiB
474 lines
16 KiB
// SPDX-License-Identifier: GPL-2.0+ |
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/* I2C support for Dialog DA9063 |
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* |
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* Copyright 2012 Dialog Semiconductor Ltd. |
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* Copyright 2013 Philipp Zabel, Pengutronix |
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* |
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* Author: Krystian Garbaciak, Dialog Semiconductor |
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*/ |
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|
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#include <linux/kernel.h> |
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#include <linux/module.h> |
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#include <linux/i2c.h> |
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#include <linux/regmap.h> |
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#include <linux/delay.h> |
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#include <linux/slab.h> |
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#include <linux/err.h> |
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|
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#include <linux/mfd/core.h> |
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#include <linux/mfd/da9063/core.h> |
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#include <linux/mfd/da9063/registers.h> |
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#include <linux/of.h> |
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#include <linux/regulator/of_regulator.h> |
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|
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/* |
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* Raw I2C access required for just accessing chip and variant info before we |
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* know which device is present. The info read from the device using this |
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* approach is then used to select the correct regmap tables. |
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*/ |
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#define DA9063_REG_PAGE_SIZE 0x100 |
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#define DA9063_REG_PAGED_ADDR_MASK 0xFF |
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enum da9063_page_sel_buf_fmt { |
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DA9063_PAGE_SEL_BUF_PAGE_REG = 0, |
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DA9063_PAGE_SEL_BUF_PAGE_VAL, |
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DA9063_PAGE_SEL_BUF_SIZE, |
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}; |
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enum da9063_paged_read_msgs { |
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DA9063_PAGED_READ_MSG_PAGE_SEL = 0, |
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DA9063_PAGED_READ_MSG_REG_SEL, |
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DA9063_PAGED_READ_MSG_DATA, |
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DA9063_PAGED_READ_MSG_CNT, |
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}; |
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static int da9063_i2c_blockreg_read(struct i2c_client *client, u16 addr, |
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u8 *buf, int count) |
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{ |
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struct i2c_msg xfer[DA9063_PAGED_READ_MSG_CNT]; |
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u8 page_sel_buf[DA9063_PAGE_SEL_BUF_SIZE]; |
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u8 page_num, paged_addr; |
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int ret; |
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/* Determine page info based on register address */ |
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page_num = (addr / DA9063_REG_PAGE_SIZE); |
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if (page_num > 1) { |
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dev_err(&client->dev, "Invalid register address provided\n"); |
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return -EINVAL; |
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} |
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paged_addr = (addr % DA9063_REG_PAGE_SIZE) & DA9063_REG_PAGED_ADDR_MASK; |
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page_sel_buf[DA9063_PAGE_SEL_BUF_PAGE_REG] = DA9063_REG_PAGE_CON; |
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page_sel_buf[DA9063_PAGE_SEL_BUF_PAGE_VAL] = |
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(page_num << DA9063_I2C_PAGE_SEL_SHIFT) & DA9063_REG_PAGE_MASK; |
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/* Write reg address, page selection */ |
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xfer[DA9063_PAGED_READ_MSG_PAGE_SEL].addr = client->addr; |
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xfer[DA9063_PAGED_READ_MSG_PAGE_SEL].flags = 0; |
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xfer[DA9063_PAGED_READ_MSG_PAGE_SEL].len = DA9063_PAGE_SEL_BUF_SIZE; |
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xfer[DA9063_PAGED_READ_MSG_PAGE_SEL].buf = page_sel_buf; |
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/* Select register address */ |
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xfer[DA9063_PAGED_READ_MSG_REG_SEL].addr = client->addr; |
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xfer[DA9063_PAGED_READ_MSG_REG_SEL].flags = 0; |
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xfer[DA9063_PAGED_READ_MSG_REG_SEL].len = sizeof(paged_addr); |
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xfer[DA9063_PAGED_READ_MSG_REG_SEL].buf = &paged_addr; |
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/* Read data */ |
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xfer[DA9063_PAGED_READ_MSG_DATA].addr = client->addr; |
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xfer[DA9063_PAGED_READ_MSG_DATA].flags = I2C_M_RD; |
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xfer[DA9063_PAGED_READ_MSG_DATA].len = count; |
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xfer[DA9063_PAGED_READ_MSG_DATA].buf = buf; |
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ret = i2c_transfer(client->adapter, xfer, DA9063_PAGED_READ_MSG_CNT); |
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if (ret < 0) { |
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dev_err(&client->dev, "Paged block read failed: %d\n", ret); |
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return ret; |
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} |
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if (ret != DA9063_PAGED_READ_MSG_CNT) { |
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dev_err(&client->dev, "Paged block read failed to complete\n"); |
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return -EIO; |
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} |
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return 0; |
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} |
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enum { |
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DA9063_DEV_ID_REG = 0, |
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DA9063_VAR_ID_REG, |
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DA9063_CHIP_ID_REGS, |
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}; |
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static int da9063_get_device_type(struct i2c_client *i2c, struct da9063 *da9063) |
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{ |
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u8 buf[DA9063_CHIP_ID_REGS]; |
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int ret; |
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ret = da9063_i2c_blockreg_read(i2c, DA9063_REG_DEVICE_ID, buf, |
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DA9063_CHIP_ID_REGS); |
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if (ret) |
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return ret; |
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if (buf[DA9063_DEV_ID_REG] != PMIC_CHIP_ID_DA9063) { |
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dev_err(da9063->dev, |
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"Invalid chip device ID: 0x%02x\n", |
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buf[DA9063_DEV_ID_REG]); |
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return -ENODEV; |
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} |
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dev_info(da9063->dev, |
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"Device detected (chip-ID: 0x%02X, var-ID: 0x%02X)\n", |
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buf[DA9063_DEV_ID_REG], buf[DA9063_VAR_ID_REG]); |
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da9063->variant_code = |
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(buf[DA9063_VAR_ID_REG] & DA9063_VARIANT_ID_MRC_MASK) |
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>> DA9063_VARIANT_ID_MRC_SHIFT; |
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return 0; |
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} |
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/* |
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* Variant specific regmap configs |
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*/ |
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static const struct regmap_range da9063_ad_readable_ranges[] = { |
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regmap_reg_range(DA9063_REG_PAGE_CON, DA9063_AD_REG_SECOND_D), |
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regmap_reg_range(DA9063_REG_SEQ, DA9063_REG_ID_32_31), |
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regmap_reg_range(DA9063_REG_SEQ_A, DA9063_REG_AUTO3_LOW), |
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regmap_reg_range(DA9063_REG_T_OFFSET, DA9063_AD_REG_GP_ID_19), |
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regmap_reg_range(DA9063_REG_DEVICE_ID, DA9063_REG_VARIANT_ID), |
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}; |
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static const struct regmap_range da9063_ad_writeable_ranges[] = { |
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regmap_reg_range(DA9063_REG_PAGE_CON, DA9063_REG_PAGE_CON), |
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regmap_reg_range(DA9063_REG_FAULT_LOG, DA9063_REG_VSYS_MON), |
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regmap_reg_range(DA9063_REG_COUNT_S, DA9063_AD_REG_ALARM_Y), |
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regmap_reg_range(DA9063_REG_SEQ, DA9063_REG_ID_32_31), |
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regmap_reg_range(DA9063_REG_SEQ_A, DA9063_REG_AUTO3_LOW), |
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regmap_reg_range(DA9063_REG_CONFIG_I, DA9063_AD_REG_MON_REG_4), |
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regmap_reg_range(DA9063_AD_REG_GP_ID_0, DA9063_AD_REG_GP_ID_19), |
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}; |
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static const struct regmap_range da9063_ad_volatile_ranges[] = { |
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regmap_reg_range(DA9063_REG_PAGE_CON, DA9063_REG_EVENT_D), |
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regmap_reg_range(DA9063_REG_CONTROL_A, DA9063_REG_CONTROL_B), |
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regmap_reg_range(DA9063_REG_CONTROL_E, DA9063_REG_CONTROL_F), |
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regmap_reg_range(DA9063_REG_BCORE2_CONT, DA9063_REG_LDO11_CONT), |
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regmap_reg_range(DA9063_REG_DVC_1, DA9063_REG_ADC_MAN), |
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regmap_reg_range(DA9063_REG_ADC_RES_L, DA9063_AD_REG_SECOND_D), |
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regmap_reg_range(DA9063_REG_SEQ, DA9063_REG_SEQ), |
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regmap_reg_range(DA9063_REG_EN_32K, DA9063_REG_EN_32K), |
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regmap_reg_range(DA9063_AD_REG_MON_REG_5, DA9063_AD_REG_MON_REG_6), |
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}; |
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static const struct regmap_access_table da9063_ad_readable_table = { |
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.yes_ranges = da9063_ad_readable_ranges, |
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.n_yes_ranges = ARRAY_SIZE(da9063_ad_readable_ranges), |
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}; |
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static const struct regmap_access_table da9063_ad_writeable_table = { |
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.yes_ranges = da9063_ad_writeable_ranges, |
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.n_yes_ranges = ARRAY_SIZE(da9063_ad_writeable_ranges), |
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}; |
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static const struct regmap_access_table da9063_ad_volatile_table = { |
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.yes_ranges = da9063_ad_volatile_ranges, |
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.n_yes_ranges = ARRAY_SIZE(da9063_ad_volatile_ranges), |
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}; |
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static const struct regmap_range da9063_bb_readable_ranges[] = { |
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regmap_reg_range(DA9063_REG_PAGE_CON, DA9063_BB_REG_SECOND_D), |
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regmap_reg_range(DA9063_REG_SEQ, DA9063_REG_ID_32_31), |
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regmap_reg_range(DA9063_REG_SEQ_A, DA9063_REG_AUTO3_LOW), |
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regmap_reg_range(DA9063_REG_T_OFFSET, DA9063_BB_REG_GP_ID_19), |
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regmap_reg_range(DA9063_REG_DEVICE_ID, DA9063_REG_VARIANT_ID), |
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}; |
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static const struct regmap_range da9063_bb_writeable_ranges[] = { |
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regmap_reg_range(DA9063_REG_PAGE_CON, DA9063_REG_PAGE_CON), |
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regmap_reg_range(DA9063_REG_FAULT_LOG, DA9063_REG_VSYS_MON), |
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regmap_reg_range(DA9063_REG_COUNT_S, DA9063_BB_REG_ALARM_Y), |
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regmap_reg_range(DA9063_REG_SEQ, DA9063_REG_ID_32_31), |
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regmap_reg_range(DA9063_REG_SEQ_A, DA9063_REG_AUTO3_LOW), |
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regmap_reg_range(DA9063_REG_CONFIG_I, DA9063_BB_REG_MON_REG_4), |
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regmap_reg_range(DA9063_BB_REG_GP_ID_0, DA9063_BB_REG_GP_ID_19), |
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}; |
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static const struct regmap_range da9063_bb_da_volatile_ranges[] = { |
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regmap_reg_range(DA9063_REG_PAGE_CON, DA9063_REG_EVENT_D), |
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regmap_reg_range(DA9063_REG_CONTROL_A, DA9063_REG_CONTROL_B), |
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regmap_reg_range(DA9063_REG_CONTROL_E, DA9063_REG_CONTROL_F), |
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regmap_reg_range(DA9063_REG_BCORE2_CONT, DA9063_REG_LDO11_CONT), |
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regmap_reg_range(DA9063_REG_DVC_1, DA9063_REG_ADC_MAN), |
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regmap_reg_range(DA9063_REG_ADC_RES_L, DA9063_BB_REG_SECOND_D), |
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regmap_reg_range(DA9063_REG_SEQ, DA9063_REG_SEQ), |
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regmap_reg_range(DA9063_REG_EN_32K, DA9063_REG_EN_32K), |
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regmap_reg_range(DA9063_BB_REG_MON_REG_5, DA9063_BB_REG_MON_REG_6), |
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}; |
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static const struct regmap_access_table da9063_bb_readable_table = { |
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.yes_ranges = da9063_bb_readable_ranges, |
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.n_yes_ranges = ARRAY_SIZE(da9063_bb_readable_ranges), |
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}; |
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static const struct regmap_access_table da9063_bb_writeable_table = { |
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.yes_ranges = da9063_bb_writeable_ranges, |
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.n_yes_ranges = ARRAY_SIZE(da9063_bb_writeable_ranges), |
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}; |
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static const struct regmap_access_table da9063_bb_da_volatile_table = { |
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.yes_ranges = da9063_bb_da_volatile_ranges, |
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.n_yes_ranges = ARRAY_SIZE(da9063_bb_da_volatile_ranges), |
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}; |
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static const struct regmap_range da9063l_bb_readable_ranges[] = { |
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regmap_reg_range(DA9063_REG_PAGE_CON, DA9063_REG_MON_A10_RES), |
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regmap_reg_range(DA9063_REG_SEQ, DA9063_REG_ID_32_31), |
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regmap_reg_range(DA9063_REG_SEQ_A, DA9063_REG_AUTO3_LOW), |
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regmap_reg_range(DA9063_REG_T_OFFSET, DA9063_BB_REG_GP_ID_19), |
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regmap_reg_range(DA9063_REG_DEVICE_ID, DA9063_REG_VARIANT_ID), |
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}; |
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static const struct regmap_range da9063l_bb_writeable_ranges[] = { |
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regmap_reg_range(DA9063_REG_PAGE_CON, DA9063_REG_PAGE_CON), |
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regmap_reg_range(DA9063_REG_FAULT_LOG, DA9063_REG_VSYS_MON), |
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regmap_reg_range(DA9063_REG_SEQ, DA9063_REG_ID_32_31), |
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regmap_reg_range(DA9063_REG_SEQ_A, DA9063_REG_AUTO3_LOW), |
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regmap_reg_range(DA9063_REG_CONFIG_I, DA9063_BB_REG_MON_REG_4), |
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regmap_reg_range(DA9063_BB_REG_GP_ID_0, DA9063_BB_REG_GP_ID_19), |
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}; |
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static const struct regmap_range da9063l_bb_da_volatile_ranges[] = { |
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regmap_reg_range(DA9063_REG_PAGE_CON, DA9063_REG_EVENT_D), |
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regmap_reg_range(DA9063_REG_CONTROL_A, DA9063_REG_CONTROL_B), |
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regmap_reg_range(DA9063_REG_CONTROL_E, DA9063_REG_CONTROL_F), |
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regmap_reg_range(DA9063_REG_BCORE2_CONT, DA9063_REG_LDO11_CONT), |
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regmap_reg_range(DA9063_REG_DVC_1, DA9063_REG_ADC_MAN), |
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regmap_reg_range(DA9063_REG_ADC_RES_L, DA9063_REG_MON_A10_RES), |
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regmap_reg_range(DA9063_REG_SEQ, DA9063_REG_SEQ), |
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regmap_reg_range(DA9063_REG_EN_32K, DA9063_REG_EN_32K), |
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regmap_reg_range(DA9063_BB_REG_MON_REG_5, DA9063_BB_REG_MON_REG_6), |
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}; |
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static const struct regmap_access_table da9063l_bb_readable_table = { |
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.yes_ranges = da9063l_bb_readable_ranges, |
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.n_yes_ranges = ARRAY_SIZE(da9063l_bb_readable_ranges), |
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}; |
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static const struct regmap_access_table da9063l_bb_writeable_table = { |
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.yes_ranges = da9063l_bb_writeable_ranges, |
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.n_yes_ranges = ARRAY_SIZE(da9063l_bb_writeable_ranges), |
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}; |
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static const struct regmap_access_table da9063l_bb_da_volatile_table = { |
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.yes_ranges = da9063l_bb_da_volatile_ranges, |
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.n_yes_ranges = ARRAY_SIZE(da9063l_bb_da_volatile_ranges), |
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}; |
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static const struct regmap_range da9063_da_readable_ranges[] = { |
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regmap_reg_range(DA9063_REG_PAGE_CON, DA9063_BB_REG_SECOND_D), |
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regmap_reg_range(DA9063_REG_SEQ, DA9063_REG_ID_32_31), |
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regmap_reg_range(DA9063_REG_SEQ_A, DA9063_REG_AUTO3_LOW), |
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regmap_reg_range(DA9063_REG_T_OFFSET, DA9063_BB_REG_GP_ID_11), |
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regmap_reg_range(DA9063_REG_DEVICE_ID, DA9063_REG_VARIANT_ID), |
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}; |
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static const struct regmap_range da9063_da_writeable_ranges[] = { |
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regmap_reg_range(DA9063_REG_PAGE_CON, DA9063_REG_PAGE_CON), |
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regmap_reg_range(DA9063_REG_FAULT_LOG, DA9063_REG_VSYS_MON), |
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regmap_reg_range(DA9063_REG_COUNT_S, DA9063_BB_REG_ALARM_Y), |
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regmap_reg_range(DA9063_REG_SEQ, DA9063_REG_ID_32_31), |
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regmap_reg_range(DA9063_REG_SEQ_A, DA9063_REG_AUTO3_LOW), |
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regmap_reg_range(DA9063_REG_CONFIG_I, DA9063_BB_REG_MON_REG_4), |
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regmap_reg_range(DA9063_BB_REG_GP_ID_0, DA9063_BB_REG_GP_ID_11), |
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}; |
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static const struct regmap_access_table da9063_da_readable_table = { |
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.yes_ranges = da9063_da_readable_ranges, |
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.n_yes_ranges = ARRAY_SIZE(da9063_da_readable_ranges), |
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}; |
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static const struct regmap_access_table da9063_da_writeable_table = { |
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.yes_ranges = da9063_da_writeable_ranges, |
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.n_yes_ranges = ARRAY_SIZE(da9063_da_writeable_ranges), |
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}; |
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static const struct regmap_range da9063l_da_readable_ranges[] = { |
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regmap_reg_range(DA9063_REG_PAGE_CON, DA9063_REG_MON_A10_RES), |
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regmap_reg_range(DA9063_REG_SEQ, DA9063_REG_ID_32_31), |
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regmap_reg_range(DA9063_REG_SEQ_A, DA9063_REG_AUTO3_LOW), |
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regmap_reg_range(DA9063_REG_T_OFFSET, DA9063_BB_REG_GP_ID_11), |
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regmap_reg_range(DA9063_REG_DEVICE_ID, DA9063_REG_VARIANT_ID), |
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}; |
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static const struct regmap_range da9063l_da_writeable_ranges[] = { |
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regmap_reg_range(DA9063_REG_PAGE_CON, DA9063_REG_PAGE_CON), |
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regmap_reg_range(DA9063_REG_FAULT_LOG, DA9063_REG_VSYS_MON), |
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regmap_reg_range(DA9063_REG_SEQ, DA9063_REG_ID_32_31), |
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regmap_reg_range(DA9063_REG_SEQ_A, DA9063_REG_AUTO3_LOW), |
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regmap_reg_range(DA9063_REG_CONFIG_I, DA9063_BB_REG_MON_REG_4), |
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regmap_reg_range(DA9063_BB_REG_GP_ID_0, DA9063_BB_REG_GP_ID_11), |
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}; |
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static const struct regmap_access_table da9063l_da_readable_table = { |
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.yes_ranges = da9063l_da_readable_ranges, |
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.n_yes_ranges = ARRAY_SIZE(da9063l_da_readable_ranges), |
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}; |
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static const struct regmap_access_table da9063l_da_writeable_table = { |
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.yes_ranges = da9063l_da_writeable_ranges, |
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.n_yes_ranges = ARRAY_SIZE(da9063l_da_writeable_ranges), |
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}; |
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static const struct regmap_range_cfg da9063_range_cfg[] = { |
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{ |
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.range_min = DA9063_REG_PAGE_CON, |
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.range_max = DA9063_REG_CONFIG_ID, |
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.selector_reg = DA9063_REG_PAGE_CON, |
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.selector_mask = 1 << DA9063_I2C_PAGE_SEL_SHIFT, |
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.selector_shift = DA9063_I2C_PAGE_SEL_SHIFT, |
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.window_start = 0, |
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.window_len = 256, |
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} |
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}; |
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static struct regmap_config da9063_regmap_config = { |
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.reg_bits = 8, |
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.val_bits = 8, |
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.ranges = da9063_range_cfg, |
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.num_ranges = ARRAY_SIZE(da9063_range_cfg), |
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.max_register = DA9063_REG_CONFIG_ID, |
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.cache_type = REGCACHE_RBTREE, |
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}; |
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static const struct of_device_id da9063_dt_ids[] = { |
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{ .compatible = "dlg,da9063", }, |
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{ .compatible = "dlg,da9063l", }, |
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{ } |
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}; |
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MODULE_DEVICE_TABLE(of, da9063_dt_ids); |
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static int da9063_i2c_probe(struct i2c_client *i2c, |
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const struct i2c_device_id *id) |
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{ |
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struct da9063 *da9063; |
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int ret; |
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da9063 = devm_kzalloc(&i2c->dev, sizeof(struct da9063), GFP_KERNEL); |
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if (da9063 == NULL) |
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return -ENOMEM; |
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i2c_set_clientdata(i2c, da9063); |
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da9063->dev = &i2c->dev; |
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da9063->chip_irq = i2c->irq; |
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da9063->type = id->driver_data; |
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ret = da9063_get_device_type(i2c, da9063); |
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if (ret) |
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return ret; |
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|
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switch (da9063->type) { |
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case PMIC_TYPE_DA9063: |
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switch (da9063->variant_code) { |
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case PMIC_DA9063_AD: |
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da9063_regmap_config.rd_table = |
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&da9063_ad_readable_table; |
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da9063_regmap_config.wr_table = |
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&da9063_ad_writeable_table; |
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da9063_regmap_config.volatile_table = |
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&da9063_ad_volatile_table; |
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break; |
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case PMIC_DA9063_BB: |
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case PMIC_DA9063_CA: |
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da9063_regmap_config.rd_table = |
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&da9063_bb_readable_table; |
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da9063_regmap_config.wr_table = |
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&da9063_bb_writeable_table; |
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da9063_regmap_config.volatile_table = |
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&da9063_bb_da_volatile_table; |
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break; |
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case PMIC_DA9063_DA: |
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da9063_regmap_config.rd_table = |
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&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: |
|
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);
|
|
|