Charles Keepax | ace6d14 | 2023-08-04 11:45:59 +0100 | [diff] [blame] | 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 | |
Charles Keepax | 8b9a1f5 | 2024-01-29 15:25:53 +0000 | [diff] [blame] | 9 | #include <linux/array_size.h> |
Charles Keepax | ace6d14 | 2023-08-04 11:45:59 +0100 | [diff] [blame] | 10 | #include <linux/err.h> |
Charles Keepax | ace6d14 | 2023-08-04 11:45:59 +0100 | [diff] [blame] | 11 | #include <linux/i2c.h> |
Charles Keepax | 8b9a1f5 | 2024-01-29 15:25:53 +0000 | [diff] [blame] | 12 | #include <linux/mfd/cs42l43.h> |
Charles Keepax | ace6d14 | 2023-08-04 11:45:59 +0100 | [diff] [blame] | 13 | #include <linux/mfd/cs42l43-regs.h> |
Charles Keepax | 8b9a1f5 | 2024-01-29 15:25:53 +0000 | [diff] [blame] | 14 | #include <linux/mod_devicetable.h> |
Charles Keepax | ace6d14 | 2023-08-04 11:45:59 +0100 | [diff] [blame] | 15 | #include <linux/module.h> |
Charles Keepax | 8b9a1f5 | 2024-01-29 15:25:53 +0000 | [diff] [blame] | 16 | #include <linux/pm.h> |
| 17 | #include <linux/regmap.h> |
Charles Keepax | ace6d14 | 2023-08-04 11:45:59 +0100 | [diff] [blame] | 18 | |
| 19 | #include "cs42l43.h" |
| 20 | |
| 21 | static 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 | |
| 38 | static int cs42l43_i2c_probe(struct i2c_client *i2c) |
| 39 | { |
| 40 | struct cs42l43 *cs42l43; |
Charles Keepax | ace6d14 | 2023-08-04 11:45:59 +0100 | [diff] [blame] | 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); |
Charles Keepax | d92b9bc | 2024-01-29 15:25:56 +0000 | [diff] [blame] | 52 | if (IS_ERR(cs42l43->regmap)) |
| 53 | return dev_err_probe(cs42l43->dev, PTR_ERR(cs42l43->regmap), |
| 54 | "Failed to allocate regmap\n"); |
Charles Keepax | ace6d14 | 2023-08-04 11:45:59 +0100 | [diff] [blame] | 55 | |
| 56 | return cs42l43_dev_probe(cs42l43); |
| 57 | } |
| 58 | |
| 59 | static 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) |
| 67 | static const struct of_device_id cs42l43_of_match[] = { |
| 68 | { .compatible = "cirrus,cs42l43", }, |
| 69 | {} |
| 70 | }; |
| 71 | MODULE_DEVICE_TABLE(of, cs42l43_of_match); |
| 72 | #endif |
| 73 | |
| 74 | #if IS_ENABLED(CONFIG_ACPI) |
| 75 | static const struct acpi_device_id cs42l43_acpi_match[] = { |
| 76 | { "CSC4243", 0 }, |
| 77 | {} |
| 78 | }; |
| 79 | MODULE_DEVICE_TABLE(acpi, cs42l43_acpi_match); |
| 80 | #endif |
| 81 | |
| 82 | static 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 | }; |
| 93 | module_i2c_driver(cs42l43_i2c_driver); |
| 94 | |
| 95 | MODULE_IMPORT_NS(MFD_CS42L43); |
| 96 | |
| 97 | MODULE_DESCRIPTION("CS42L43 I2C Driver"); |
| 98 | MODULE_AUTHOR("Charles Keepax <ckeepax@opensource.cirrus.com>"); |
| 99 | MODULE_LICENSE("GPL"); |