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 20static const struct spi_device_id cs35l41_id_spi[] = { 21 { "cs35l40", 0 }, 22 { "cs35l41", 0 }, 23 { "cs35l51", 0 }, 24 { "cs35l53", 0 }, 25 {} 26}; 27 28MODULE_DEVICE_TABLE(spi, cs35l41_id_spi); 29 30static 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 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 return dev_err_probe(cs35l41->dev, PTR_ERR(cs35l41->regmap), 47 "Failed to allocate register map\n"); 48 49 cs35l41->dev = &spi->dev; 50 cs35l41->irq = spi->irq; 51 52 return cs35l41_probe(cs35l41, hw_cfg); 53} 54 55static void cs35l41_spi_remove(struct spi_device *spi) 56{ 57 struct cs35l41_private *cs35l41 = spi_get_drvdata(spi); 58 59 cs35l41_remove(cs35l41); 60} 61 62#ifdef CONFIG_OF 63static const struct of_device_id cs35l41_of_match[] = { 64 { .compatible = "cirrus,cs35l40" }, 65 { .compatible = "cirrus,cs35l41" }, 66 {}, 67}; 68MODULE_DEVICE_TABLE(of, cs35l41_of_match); 69#endif 70 71#ifdef CONFIG_ACPI 72static const struct acpi_device_id cs35l41_acpi_match[] = { 73 { "CSC3541", 0 }, /* Cirrus Logic PnP ID + part ID */ 74 { "CLSA3541", 0 }, /* Cirrus Logic PnP ID + part ID */ 75 {}, 76}; 77MODULE_DEVICE_TABLE(acpi, cs35l41_acpi_match); 78#endif 79 80static struct spi_driver cs35l41_spi_driver = { 81 .driver = { 82 .name = "cs35l41", 83 .pm = pm_ptr(&cs35l41_pm_ops), 84 .of_match_table = of_match_ptr(cs35l41_of_match), 85 .acpi_match_table = ACPI_PTR(cs35l41_acpi_match), 86 }, 87 .id_table = cs35l41_id_spi, 88 .probe = cs35l41_spi_probe, 89 .remove = cs35l41_spi_remove, 90}; 91 92module_spi_driver(cs35l41_spi_driver); 93 94MODULE_DESCRIPTION("SPI CS35L41 driver"); 95MODULE_AUTHOR("David Rhodes, Cirrus Logic Inc, <david.rhodes@cirrus.com>"); 96MODULE_LICENSE("GPL"); 97