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 <sound/cs35l41.h> 19 #include "cs35l41.h" 20 21 static const struct spi_device_id cs35l41_id_spi[] = { 22 { "cs35l40", 0 }, 23 { "cs35l41", 0 }, 24 {} 25 }; 26 27 MODULE_DEVICE_TABLE(spi, cs35l41_id_spi); 28 29 static int cs35l41_spi_probe(struct spi_device *spi) 30 { 31 const struct regmap_config *regmap_config = &cs35l41_regmap_spi; 32 struct cs35l41_platform_data *pdata = dev_get_platdata(&spi->dev); 33 struct cs35l41_private *cs35l41; 34 int ret; 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 ret = PTR_ERR(cs35l41->regmap); 47 dev_err(&spi->dev, "Failed to allocate register map: %d\n", ret); 48 return ret; 49 } 50 51 cs35l41->dev = &spi->dev; 52 cs35l41->irq = spi->irq; 53 54 return cs35l41_probe(cs35l41, pdata); 55 } 56 57 static int cs35l41_spi_remove(struct spi_device *spi) 58 { 59 struct cs35l41_private *cs35l41 = spi_get_drvdata(spi); 60 61 cs35l41_remove(cs35l41); 62 63 return 0; 64 } 65 66 #ifdef CONFIG_OF 67 static const struct of_device_id cs35l41_of_match[] = { 68 { .compatible = "cirrus,cs35l40" }, 69 { .compatible = "cirrus,cs35l41" }, 70 {}, 71 }; 72 MODULE_DEVICE_TABLE(of, cs35l41_of_match); 73 #endif 74 75 #ifdef CONFIG_ACPI 76 static const struct acpi_device_id cs35l41_acpi_match[] = { 77 { "CSC3541", 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 .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, <david.rhodes@cirrus.com>"); 98 MODULE_LICENSE("GPL"); 99