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https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2026-08-14 06:22:34 +02:00
Alexey Charkov
9adbe53e32
Add register definitions and a new 'type' enum to be passed via MFD private data to support the BQ25792, which is a newer variant of the BQ257xx family. BQ25792 shares similar logic of operation with the already supported BQ25703A but has a completely different register map and different electrical constraints. Signed-off-by: Alexey Charkov <alchark@flipper.net> Tested-by: Chris Morgan <macromorgan@hotmail.com> Link: https://patch.msgid.link/20260331-bq25792-v6-9-0278fba33eb9@flipper.net Signed-off-by: Lee Jones <lee@kernel.org>
148 lines
4.1 KiB
C
148 lines
4.1 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 regmap_range bq25792_writeable_reg_ranges[] = {
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regmap_reg_range(BQ25792_REG00_MIN_SYS_VOLTAGE,
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BQ25792_REG18_NTC_CONTROL_1),
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regmap_reg_range(BQ25792_REG28_CHARGER_MASK_0,
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BQ25792_REG30_ADC_FUNCTION_DISABLE_1),
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};
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static const struct regmap_access_table bq25792_writeable_regs = {
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.yes_ranges = bq25792_writeable_reg_ranges,
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.n_yes_ranges = ARRAY_SIZE(bq25792_writeable_reg_ranges),
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};
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static const struct regmap_range bq25792_volatile_reg_ranges[] = {
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regmap_reg_range(BQ25792_REG19_ICO_CURRENT_LIMIT,
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BQ25792_REG27_FAULT_FLAG_1),
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regmap_reg_range(BQ25792_REG31_IBUS_ADC,
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BQ25792_REG47_DPDM_DRIVER),
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};
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static const struct regmap_access_table bq25792_volatile_regs = {
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.yes_ranges = bq25792_volatile_reg_ranges,
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.n_yes_ranges = ARRAY_SIZE(bq25792_volatile_reg_ranges),
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};
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static const struct regmap_config bq25792_regmap_config = {
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.reg_bits = 8,
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.val_bits = 8,
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.max_register = BQ25792_REG48_PART_INFORMATION,
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.cache_type = REGCACHE_MAPLE,
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.wr_table = &bq25792_writeable_regs,
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.volatile_table = &bq25792_volatile_regs,
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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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const struct regmap_config *rcfg;
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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->type = (uintptr_t)i2c_get_match_data(client);
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ddata->client = client;
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switch (ddata->type) {
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case BQ25703A:
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rcfg = &bq25703_regmap_config;
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break;
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case BQ25792:
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rcfg = &bq25792_regmap_config;
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break;
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default:
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return dev_err_probe(&client->dev, -ENODEV, "Unsupported device type\n");
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}
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ddata->regmap = devm_regmap_init_i2c(client, rcfg);
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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", BQ25703A },
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{ "bq25792", BQ25792 },
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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", .data = (void *)BQ25703A },
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{ .compatible = "ti,bq25792", .data = (void *)BQ25792 },
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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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