projects / linux-2.6-block.git / blame
| Commit | Line | Data |
|---|---|---|
| ace6d144 CK |
1 | // SPDX-License-Identifier: GPL-2.0 |
| 2 | /* | |
| 3 | * CS42L43 I2C driver | |
| 4 | * | |
| 5 | * Copyright (C) 2022-2023 Cirrus Logic, Inc. and | |
| 6 | * Cirrus Logic International Semiconductor Ltd. | |
| 7 | */ | |
| 8 | ||
| 9 | #include <linux/err.h> | |
| 10 | #include <linux/errno.h> | |
| 11 | #include <linux/i2c.h> | |
| 12 | #include <linux/mfd/cs42l43-regs.h> | |
| 13 | #include <linux/module.h> | |
| 14 | ||
| 15 | #include "cs42l43.h" | |
| 16 | ||
| 17 | static const struct regmap_config cs42l43_i2c_regmap = { | |
| 18 | .reg_bits = 32, | |
| 19 | .reg_stride = 4, | |
| 20 | .val_bits = 32, | |
| 21 | .reg_format_endian = REGMAP_ENDIAN_BIG, | |
| 22 | .val_format_endian = REGMAP_ENDIAN_BIG, | |
| 23 | ||
| 24 | .max_register = CS42L43_MCU_RAM_MAX, | |
| 25 | .readable_reg = cs42l43_readable_register, | |
| 26 | .volatile_reg = cs42l43_volatile_register, | |
| 27 | .precious_reg = cs42l43_precious_register, | |
| 28 | ||
| 29 | .cache_type = REGCACHE_MAPLE, | |
| 30 | .reg_defaults = cs42l43_reg_default, | |
| 31 | .num_reg_defaults = ARRAY_SIZE(cs42l43_reg_default), | |
| 32 | }; | |
| 33 | ||
| 34 | static int cs42l43_i2c_probe(struct i2c_client *i2c) | |
| 35 | { | |
| 36 | struct cs42l43 *cs42l43; | |
| 37 | int ret; | |
| 38 | ||
| 39 | cs42l43 = devm_kzalloc(&i2c->dev, sizeof(*cs42l43), GFP_KERNEL); | |
| 40 | if (!cs42l43) | |
| 41 | return -ENOMEM; | |
| 42 | ||
| 43 | cs42l43->dev = &i2c->dev; | |
| 44 | cs42l43->irq = i2c->irq; | |
| 45 | /* A device on an I2C is always attached by definition. */ | |
| 46 | cs42l43->attached = true; | |
| 47 | ||
| 48 | cs42l43->regmap = devm_regmap_init_i2c(i2c, &cs42l43_i2c_regmap); | |
| 49 | if (IS_ERR(cs42l43->regmap)) { | |
| 50 | ret = PTR_ERR(cs42l43->regmap); | |
| 51 | dev_err(cs42l43->dev, "Failed to allocate regmap: %d\n", ret); | |
| 52 | return ret; | |
| 53 | } | |
| 54 | ||
| 55 | return cs42l43_dev_probe(cs42l43); | |
| 56 | } | |
| 57 | ||
| 58 | static void cs42l43_i2c_remove(struct i2c_client *i2c) | |
| 59 | { | |
| 60 | struct cs42l43 *cs42l43 = dev_get_drvdata(&i2c->dev); | |
| 61 | ||
| 62 | cs42l43_dev_remove(cs42l43); | |
| 63 | } | |
| 64 | ||
| 65 | #if IS_ENABLED(CONFIG_OF) | |
| 66 | static const struct of_device_id cs42l43_of_match[] = { | |
| 67 | { .compatible = "cirrus,cs42l43", }, | |
| 68 | {} | |
| 69 | }; | |
| 70 | MODULE_DEVICE_TABLE(of, cs42l43_of_match); | |
| 71 | #endif | |
| 72 | ||
| 73 | #if IS_ENABLED(CONFIG_ACPI) | |
| 74 | static const struct acpi_device_id cs42l43_acpi_match[] = { | |
| 75 | { "CSC4243", 0 }, | |
| 76 | {} | |
| 77 | }; | |
| 78 | MODULE_DEVICE_TABLE(acpi, cs42l43_acpi_match); | |
| 79 | #endif | |
| 80 | ||
| 81 | static struct i2c_driver cs42l43_i2c_driver = { | |
| 82 | .driver = { | |
| 83 | .name = "cs42l43", | |
| 84 | .pm = pm_ptr(&cs42l43_pm_ops), | |
| 85 | .of_match_table = of_match_ptr(cs42l43_of_match), | |
| 86 | .acpi_match_table = ACPI_PTR(cs42l43_acpi_match), | |
| 87 | }, | |
| 88 | ||
| 89 | .probe = cs42l43_i2c_probe, | |
| 90 | .remove = cs42l43_i2c_remove, | |
| 91 | }; | |
| 92 | module_i2c_driver(cs42l43_i2c_driver); | |
| 93 | ||
| 94 | MODULE_IMPORT_NS(MFD_CS42L43); | |
| 95 | ||
| 96 | MODULE_DESCRIPTION("CS42L43 I2C Driver"); | |
| 97 | MODULE_AUTHOR("Charles Keepax <ckeepax@opensource.cirrus.com>"); | |
| 98 | MODULE_LICENSE("GPL"); |