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3b1bbfb5fc
The Texas Instruments BQ25703A is an integrated charger manager and boost converter. The MFD driver initializes the device for the regulator driver and power supply driver. Signed-off-by: Chris Morgan <macromorgan@hotmail.com> Link: https://lore.kernel.org/r/20250904160530.66178-3-macroalpha82@gmail.com Signed-off-by: Lee Jones <lee@kernel.org>
100 lines
2.6 KiB
C
100 lines
2.6 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* BQ257XX Core Driver
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* Copyright (C) 2025 Chris Morgan <macromorgan@hotmail.com>
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*/
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#include <linux/device.h>
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#include <linux/i2c.h>
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#include <linux/mfd/bq257xx.h>
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#include <linux/mfd/core.h>
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#include <linux/regmap.h>
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static const struct regmap_range bq25703_readonly_reg_ranges[] = {
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regmap_reg_range(BQ25703_CHARGER_STATUS, BQ25703_MANUFACT_DEV_ID),
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};
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static const struct regmap_access_table bq25703_writeable_regs = {
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.no_ranges = bq25703_readonly_reg_ranges,
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.n_no_ranges = ARRAY_SIZE(bq25703_readonly_reg_ranges),
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};
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static const struct regmap_range bq25703_volatile_reg_ranges[] = {
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regmap_reg_range(BQ25703_CHARGE_OPTION_0, BQ25703_IIN_HOST),
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regmap_reg_range(BQ25703_CHARGER_STATUS, BQ25703_ADC_OPTION),
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};
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static const struct regmap_access_table bq25703_volatile_regs = {
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.yes_ranges = bq25703_volatile_reg_ranges,
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.n_yes_ranges = ARRAY_SIZE(bq25703_volatile_reg_ranges),
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};
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static const struct regmap_config bq25703_regmap_config = {
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.reg_bits = 8,
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.val_bits = 16,
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.max_register = BQ25703_ADC_OPTION,
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.cache_type = REGCACHE_MAPLE,
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.wr_table = &bq25703_writeable_regs,
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.volatile_table = &bq25703_volatile_regs,
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.val_format_endian = REGMAP_ENDIAN_LITTLE,
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};
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static const struct mfd_cell cells[] = {
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MFD_CELL_NAME("bq257xx-regulator"),
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MFD_CELL_NAME("bq257xx-charger"),
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};
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static int bq257xx_probe(struct i2c_client *client)
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{
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struct bq257xx_device *ddata;
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int ret;
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ddata = devm_kzalloc(&client->dev, sizeof(*ddata), GFP_KERNEL);
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if (!ddata)
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return -ENOMEM;
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ddata->client = client;
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ddata->regmap = devm_regmap_init_i2c(client, &bq25703_regmap_config);
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if (IS_ERR(ddata->regmap)) {
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return dev_err_probe(&client->dev, PTR_ERR(ddata->regmap),
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"Failed to allocate register map\n");
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}
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i2c_set_clientdata(client, ddata);
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ret = devm_mfd_add_devices(&client->dev, PLATFORM_DEVID_AUTO,
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cells, ARRAY_SIZE(cells), NULL, 0, NULL);
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if (ret)
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return dev_err_probe(&client->dev, ret,
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"Failed to register child devices\n");
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return ret;
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}
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static const struct i2c_device_id bq257xx_i2c_ids[] = {
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{ "bq25703a" },
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{}
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};
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MODULE_DEVICE_TABLE(i2c, bq257xx_i2c_ids);
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static const struct of_device_id bq257xx_of_match[] = {
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{ .compatible = "ti,bq25703a" },
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{}
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};
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MODULE_DEVICE_TABLE(of, bq257xx_of_match);
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static struct i2c_driver bq257xx_driver = {
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.driver = {
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.name = "bq257xx",
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.of_match_table = bq257xx_of_match,
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},
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.probe = bq257xx_probe,
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.id_table = bq257xx_i2c_ids,
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};
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module_i2c_driver(bq257xx_driver);
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MODULE_DESCRIPTION("bq257xx buck/boost/charger driver");
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MODULE_AUTHOR("Chris Morgan <macromorgan@hotmail.com>");
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MODULE_LICENSE("GPL");
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