sound/soc/codecs/cs35l41-spi.c

   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
  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
  36         cs35l41 = devm_kzalloc(&spi->dev, sizeof(struct cs35l41_private), GFP_KERNEL);
  37         if (!cs35l41)
  38                 return -ENOMEM;
  39
  40         spi->max_speed_hz = CS35L41_SPI_MAX_FREQ;
  41         spi_setup(spi);
  42
  43         spi_set_drvdata(spi, cs35l41);
  44         cs35l41->regmap = devm_regmap_init_spi(spi, regmap_config);
  45         if (IS_ERR(cs35l41->regmap))
  46                 return dev_err_probe(cs35l41->dev, PTR_ERR(cs35l41->regmap),
  47                                      "Failed to allocate register map\n");
  48
  49         cs35l41->dev = &spi->dev;
  50         cs35l41->irq = spi->irq;
  51
  52         return cs35l41_probe(cs35l41, hw_cfg);
  53 }
  54
  55 static void cs35l41_spi_remove(struct spi_device *spi)
  56 {
  57         struct cs35l41_private *cs35l41 = spi_get_drvdata(spi);
  58
  59         cs35l41_remove(cs35l41);
  60 }
  61
  62 #ifdef CONFIG_OF
  63 static const struct of_device_id cs35l41_of_match[] = {
  64         { .compatible = "cirrus,cs35l40" },
  65         { .compatible = "cirrus,cs35l41" },
  66         {},
  67 };
  68 MODULE_DEVICE_TABLE(of, cs35l41_of_match);
  69 #endif
  70
  71 #ifdef CONFIG_ACPI
  72 static const struct acpi_device_id cs35l41_acpi_match[] = {
  73         { "CSC3541", 0 }, /* Cirrus Logic PnP ID + part ID */
  74         { "CLSA3541", 0 }, /* Cirrus Logic PnP ID + part ID */
  75         {},
  76 };
  77 MODULE_DEVICE_TABLE(acpi, cs35l41_acpi_match);
  78 #endif
  79
  80 static struct spi_driver cs35l41_spi_driver = {
  81         .driver = {
  82                 .name           = "cs35l41",
  83                 .pm             = pm_ptr(&cs35l41_pm_ops),
  84                 .of_match_table = of_match_ptr(cs35l41_of_match),
  85                 .acpi_match_table = ACPI_PTR(cs35l41_acpi_match),
  86         },
  87         .id_table       = cs35l41_id_spi,
  88         .probe          = cs35l41_spi_probe,
  89         .remove         = cs35l41_spi_remove,
  90 };
  91
  92 module_spi_driver(cs35l41_spi_driver);
  93
  94 MODULE_DESCRIPTION("SPI CS35L41 driver");
  95 MODULE_AUTHOR("David Rhodes, Cirrus Logic Inc, <david.rhodes@cirrus.com>");
  96 MODULE_LICENSE("GPL");