sound/soc/codecs/cs35l45-spi.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 //
   3 // cs35l45-spi.c -- CS35L45 SPI driver
   4 //
   5 // Copyright 2019-2022 Cirrus Logic, Inc.
   6 //
   7 // Author: James Schulman <james.schulman@cirrus.com>
   8
   9 #include <linux/device.h>
  10 #include <linux/module.h>
  11 #include <linux/regmap.h>
  12 #include <linux/spi/spi.h>
  13
  14 #include "cs35l45.h"
  15
  16 static int cs35l45_spi_probe(struct spi_device *spi)
  17 {
  18         struct cs35l45_private *cs35l45;
  19         struct device *dev = &spi->dev;
  20         int ret;
  21
  22         cs35l45 = devm_kzalloc(dev, sizeof(struct cs35l45_private), GFP_KERNEL);
  23         if (cs35l45 == NULL)
  24                 return -ENOMEM;
  25
  26         spi->max_speed_hz = CS35L45_SPI_MAX_FREQ;
  27         spi_setup(spi);
  28
  29         spi_set_drvdata(spi, cs35l45);
  30         cs35l45->regmap = devm_regmap_init_spi(spi, &cs35l45_spi_regmap);
  31         if (IS_ERR(cs35l45->regmap)) {
  32                 ret = PTR_ERR(cs35l45->regmap);
  33                 dev_err(dev, "Failed to allocate register map: %d\n", ret);
  34                 return ret;
  35         }
  36
  37         cs35l45->dev = dev;
  38         cs35l45->irq = spi->irq;
  39         cs35l45->bus_type = CONTROL_BUS_SPI;
  40
  41         return cs35l45_probe(cs35l45);
  42 }
  43
  44 static void cs35l45_spi_remove(struct spi_device *spi)
  45 {
  46         struct cs35l45_private *cs35l45 = spi_get_drvdata(spi);
  47
  48         cs35l45_remove(cs35l45);
  49 }
  50
  51 static const struct of_device_id cs35l45_of_match[] = {
  52         { .compatible = "cirrus,cs35l45" },
  53         {},
  54 };
  55 MODULE_DEVICE_TABLE(of, cs35l45_of_match);
  56
  57 static const struct spi_device_id cs35l45_id_spi[] = {
  58         { "cs35l45", 0 },
  59         {}
  60 };
  61 MODULE_DEVICE_TABLE(spi, cs35l45_id_spi);
  62
  63 static struct spi_driver cs35l45_spi_driver = {
  64         .driver = {
  65                 .name           = "cs35l45",
  66                 .of_match_table = cs35l45_of_match,
  67                 .pm             = &cs35l45_pm_ops,
  68         },
  69         .id_table       = cs35l45_id_spi,
  70         .probe          = cs35l45_spi_probe,
  71         .remove         = cs35l45_spi_remove,
  72 };
  73 module_spi_driver(cs35l45_spi_driver);
  74
  75 MODULE_DESCRIPTION("SPI CS35L45 driver");
  76 MODULE_AUTHOR("James Schulman, Cirrus Logic Inc, <james.schulman@cirrus.com>");
  77 MODULE_LICENSE("GPL");
  78 MODULE_IMPORT_NS(SND_SOC_CS35L45);