1 // SPDX-License-Identifier: GPL-2.0
2 //
3 // cs35l41-spi.c -- CS35l41 SPI driver
4 //
5 // Copyright 2017-2021 Cirrus Logic, Inc.
6 //
7 // Author: David Rhodes <david.rhodes@cirrus.com>
8
9 #include <linux/acpi.h>
10 #include <linux/delay.h>
11 #include <linux/init.h>
12 #include <linux/kernel.h>
13 #include <linux/module.h>
14 #include <linux/moduleparam.h>
15 #include <linux/platform_device.h>
16 #include <linux/spi/spi.h>
17
18 #include "cs35l41.h"
19
20 static const struct spi_device_id cs35l41_id_spi[] = {
21 { "cs35l40", 0 },
22 { "cs35l41", 0 },
23 { "cs35l51", 0 },
24 { "cs35l53", 0 },
25 {}
26 };
27
28 MODULE_DEVICE_TABLE(spi, cs35l41_id_spi);
29
cs35l41_spi_probe(struct spi_device * spi)30 static int cs35l41_spi_probe(struct spi_device *spi)
31 {
32 const struct regmap_config *regmap_config = &cs35l41_regmap_spi;
33 struct cs35l41_hw_cfg *hw_cfg = dev_get_platdata(&spi->dev);
34 struct cs35l41_private *cs35l41;
35 int ret;
36
37 cs35l41 = devm_kzalloc(&spi->dev, sizeof(struct cs35l41_private), GFP_KERNEL);
38 if (!cs35l41)
39 return -ENOMEM;
40
41 spi->max_speed_hz = CS35L41_SPI_MAX_FREQ;
42 spi_setup(spi);
43
44 spi_set_drvdata(spi, cs35l41);
45 cs35l41->regmap = devm_regmap_init_spi(spi, regmap_config);
46 if (IS_ERR(cs35l41->regmap)) {
47 ret = PTR_ERR(cs35l41->regmap);
48 dev_err(&spi->dev, "Failed to allocate register map: %d\n", ret);
49 return ret;
50 }
51
52 cs35l41->dev = &spi->dev;
53 cs35l41->irq = spi->irq;
54
55 return cs35l41_probe(cs35l41, hw_cfg);
56 }
57
cs35l41_spi_remove(struct spi_device * spi)58 static void cs35l41_spi_remove(struct spi_device *spi)
59 {
60 struct cs35l41_private *cs35l41 = spi_get_drvdata(spi);
61
62 cs35l41_remove(cs35l41);
63 }
64
65 #ifdef CONFIG_OF
66 static const struct of_device_id cs35l41_of_match[] = {
67 { .compatible = "cirrus,cs35l40" },
68 { .compatible = "cirrus,cs35l41" },
69 {},
70 };
71 MODULE_DEVICE_TABLE(of, cs35l41_of_match);
72 #endif
73
74 #ifdef CONFIG_ACPI
75 static const struct acpi_device_id cs35l41_acpi_match[] = {
76 { "CSC3541", 0 }, /* Cirrus Logic PnP ID + part ID */
77 { "CLSA3541", 0 }, /* Cirrus Logic PnP ID + part ID */
78 {},
79 };
80 MODULE_DEVICE_TABLE(acpi, cs35l41_acpi_match);
81 #endif
82
83 static struct spi_driver cs35l41_spi_driver = {
84 .driver = {
85 .name = "cs35l41",
86 .pm = &cs35l41_pm_ops,
87 .of_match_table = of_match_ptr(cs35l41_of_match),
88 .acpi_match_table = ACPI_PTR(cs35l41_acpi_match),
89 },
90 .id_table = cs35l41_id_spi,
91 .probe = cs35l41_spi_probe,
92 .remove = cs35l41_spi_remove,
93 };
94
95 module_spi_driver(cs35l41_spi_driver);
96
97 MODULE_DESCRIPTION("SPI CS35L41 driver");
98 MODULE_AUTHOR("David Rhodes, Cirrus Logic Inc, <david.rhodes@cirrus.com>");
99 MODULE_LICENSE("GPL");
100