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/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 | |
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; |
41 | |
42 | cs42l43 = devm_kzalloc(dev: &i2c->dev, size: 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(ptr: cs42l43->regmap)) |
53 | return dev_err_probe(dev: cs42l43->dev, err: PTR_ERR(ptr: cs42l43->regmap), |
54 | fmt: "Failed to allocate regmap\n" ); |
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(dev: &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" ); |
100 | |