1 // SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause 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("Dual BSD/GPL"); 78 MODULE_IMPORT_NS(SND_SOC_CS35L45); 79