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 ret = spi_setup(spi);
43 if (ret < 0)
44 return ret;
45
46 spi_set_drvdata(spi, cs35l41);
47 cs35l41->regmap = devm_regmap_init_spi(spi, regmap_config);
48 if (IS_ERR(cs35l41->regmap)) {
49 ret = PTR_ERR(cs35l41->regmap);
50 dev_err(&spi->dev, "Failed to allocate register map: %d\n", ret);
51 return ret;
52 }
53
54 cs35l41->dev = &spi->dev;
55 cs35l41->irq = spi->irq;
56
57 return cs35l41_probe(cs35l41, hw_cfg);
58 }
59
cs35l41_spi_remove(struct spi_device * spi)60 static void cs35l41_spi_remove(struct spi_device *spi)
61 {
62 struct cs35l41_private *cs35l41 = spi_get_drvdata(spi);
63
64 cs35l41_remove(cs35l41);
65 }
66
67 #ifdef CONFIG_OF
68 static const struct of_device_id cs35l41_of_match[] = {
69 { .compatible = "cirrus,cs35l40" },
70 { .compatible = "cirrus,cs35l41" },
71 {},
72 };
73 MODULE_DEVICE_TABLE(of, cs35l41_of_match);
74 #endif
75
76 #ifdef CONFIG_ACPI
77 static const struct acpi_device_id cs35l41_acpi_match[] = {
78 { "CSC3541", 0 }, /* Cirrus Logic PnP ID + part ID */
79 { "CLSA3541", 0 }, /* Cirrus Logic PnP ID + part ID */
80 {},
81 };
82 MODULE_DEVICE_TABLE(acpi, cs35l41_acpi_match);
83 #endif
84
85 static struct spi_driver cs35l41_spi_driver = {
86 .driver = {
87 .name = "cs35l41",
88 .pm = &cs35l41_pm_ops,
89 .of_match_table = of_match_ptr(cs35l41_of_match),
90 .acpi_match_table = ACPI_PTR(cs35l41_acpi_match),
91 },
92 .id_table = cs35l41_id_spi,
93 .probe = cs35l41_spi_probe,
94 .remove = cs35l41_spi_remove,
95 };
96
97 module_spi_driver(cs35l41_spi_driver);
98
99 MODULE_DESCRIPTION("SPI CS35L41 driver");
100 MODULE_AUTHOR("David Rhodes, Cirrus Logic Inc, <david.rhodes@cirrus.com>");
101 MODULE_LICENSE("GPL");
102