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 <[email protected]>
   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         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
  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         {},
  78 };
  79 MODULE_DEVICE_TABLE(acpi, cs35l41_acpi_match);
  80 #endif
  81
  82 static struct spi_driver cs35l41_spi_driver = {
  83         .driver = {
  84                 .name           = "cs35l41",
  85                 .pm             = &cs35l41_pm_ops,
  86                 .of_match_table = of_match_ptr(cs35l41_of_match),
  87                 .acpi_match_table = ACPI_PTR(cs35l41_acpi_match),
  88         },
  89         .id_table       = cs35l41_id_spi,
  90         .probe          = cs35l41_spi_probe,
  91         .remove         = cs35l41_spi_remove,
  92 };
  93
  94 module_spi_driver(cs35l41_spi_driver);
  95
  96 MODULE_DESCRIPTION("SPI CS35L41 driver");
  97 MODULE_AUTHOR("David Rhodes, Cirrus Logic Inc, <[email protected]>");
  98 MODULE_LICENSE("GPL");