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 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, <david.rhodes@cirrus.com>"); 98 MODULE_LICENSE("GPL"); 99