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1// SPDX-License-Identifier: GPL-2.02/*3 * CS42L43 I2C driver4 *5 * Copyright (C) 2022-2023 Cirrus Logic, Inc. and6 * Cirrus Logic International Semiconductor Ltd.7 */8 9#include <linux/array_size.h>10#include <linux/err.h>11#include <linux/i2c.h>12#include <linux/mfd/cs42l43.h>13#include <linux/mfd/cs42l43-regs.h>14#include <linux/mod_devicetable.h>15#include <linux/module.h>16#include <linux/pm.h>17#include <linux/regmap.h>18 19#include "cs42l43.h"20 21static const struct regmap_config cs42l43_i2c_regmap = {22 .reg_bits = 32,23 .reg_stride = 4,24 .val_bits = 32,25 .reg_format_endian = REGMAP_ENDIAN_BIG,26 .val_format_endian = REGMAP_ENDIAN_BIG,27 28 .max_register = CS42L43_MCU_RAM_MAX,29 .readable_reg = cs42l43_readable_register,30 .volatile_reg = cs42l43_volatile_register,31 .precious_reg = cs42l43_precious_register,32 33 .cache_type = REGCACHE_MAPLE,34 .reg_defaults = cs42l43_reg_default,35 .num_reg_defaults = ARRAY_SIZE(cs42l43_reg_default),36};37 38static int cs42l43_i2c_probe(struct i2c_client *i2c)39{40 struct cs42l43 *cs42l43;41 42 cs42l43 = devm_kzalloc(&i2c->dev, sizeof(*cs42l43), GFP_KERNEL);43 if (!cs42l43)44 return -ENOMEM;45 46 cs42l43->dev = &i2c->dev;47 cs42l43->irq = i2c->irq;48 /* A device on an I2C is always attached by definition. */49 cs42l43->attached = true;50 51 cs42l43->regmap = devm_regmap_init_i2c(i2c, &cs42l43_i2c_regmap);52 if (IS_ERR(cs42l43->regmap))53 return dev_err_probe(cs42l43->dev, PTR_ERR(cs42l43->regmap),54 "Failed to allocate regmap\n");55 56 return cs42l43_dev_probe(cs42l43);57}58 59static void cs42l43_i2c_remove(struct i2c_client *i2c)60{61 struct cs42l43 *cs42l43 = dev_get_drvdata(&i2c->dev);62 63 cs42l43_dev_remove(cs42l43);64}65 66#if IS_ENABLED(CONFIG_OF)67static const struct of_device_id cs42l43_of_match[] = {68 { .compatible = "cirrus,cs42l43", },69 {}70};71MODULE_DEVICE_TABLE(of, cs42l43_of_match);72#endif73 74#if IS_ENABLED(CONFIG_ACPI)75static const struct acpi_device_id cs42l43_acpi_match[] = {76 { "CSC4243", 0 },77 {}78};79MODULE_DEVICE_TABLE(acpi, cs42l43_acpi_match);80#endif81 82static struct i2c_driver cs42l43_i2c_driver = {83 .driver = {84 .name = "cs42l43",85 .pm = pm_ptr(&cs42l43_pm_ops),86 .of_match_table = of_match_ptr(cs42l43_of_match),87 .acpi_match_table = ACPI_PTR(cs42l43_acpi_match),88 },89 90 .probe = cs42l43_i2c_probe,91 .remove = cs42l43_i2c_remove,92};93module_i2c_driver(cs42l43_i2c_driver);94 95MODULE_IMPORT_NS(MFD_CS42L43);96 97MODULE_DESCRIPTION("CS42L43 I2C Driver");98MODULE_AUTHOR("Charles Keepax <ckeepax@opensource.cirrus.com>");99MODULE_LICENSE("GPL");100