1// SPDX-License-Identifier: GPL-2.0 2// 3// cs35l41-i2c.c -- CS35l41 I2C 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/i2c.h> 12#include <linux/init.h> 13#include <linux/kernel.h> 14#include <linux/module.h> 15#include <linux/moduleparam.h> 16#include <linux/of.h> 17#include <linux/platform_device.h> 18#include <linux/slab.h> 19 20#include "cs35l41.h" 21 22static const struct i2c_device_id cs35l41_id_i2c[] = { 23 { "cs35l40", 0 }, 24 { "cs35l41", 0 }, 25 { "cs35l51", 0 }, 26 { "cs35l53", 0 }, 27 {} 28}; 29 30MODULE_DEVICE_TABLE(i2c, cs35l41_id_i2c); 31 32static int cs35l41_i2c_probe(struct i2c_client *client) 33{ 34 struct cs35l41_private *cs35l41; 35 struct device *dev = &client->dev; 36 struct cs35l41_hw_cfg *hw_cfg = dev_get_platdata(dev); 37 const struct regmap_config *regmap_config = &cs35l41_regmap_i2c; 38 39 cs35l41 = devm_kzalloc(dev, sizeof(struct cs35l41_private), GFP_KERNEL); 40 41 if (!cs35l41) 42 return -ENOMEM; 43 44 cs35l41->dev = dev; 45 cs35l41->irq = client->irq; 46 47 i2c_set_clientdata(client, cs35l41); 48 cs35l41->regmap = devm_regmap_init_i2c(client, regmap_config); 49 if (IS_ERR(cs35l41->regmap)) 50 return dev_err_probe(cs35l41->dev, PTR_ERR(cs35l41->regmap), 51 "Failed to allocate register map\n"); 52 53 return cs35l41_probe(cs35l41, hw_cfg); 54} 55 56static void cs35l41_i2c_remove(struct i2c_client *client) 57{ 58 struct cs35l41_private *cs35l41 = i2c_get_clientdata(client); 59 60 cs35l41_remove(cs35l41); 61} 62 63#ifdef CONFIG_OF 64static const struct of_device_id cs35l41_of_match[] = { 65 { .compatible = "cirrus,cs35l40" }, 66 { .compatible = "cirrus,cs35l41" }, 67 {}, 68}; 69MODULE_DEVICE_TABLE(of, cs35l41_of_match); 70#endif 71 72#ifdef CONFIG_ACPI 73static const struct acpi_device_id cs35l41_acpi_match[] = { 74 { "CSC3541", 0 }, /* Cirrus Logic PnP ID + part ID */ 75 {}, 76}; 77MODULE_DEVICE_TABLE(acpi, cs35l41_acpi_match); 78#endif 79 80static struct i2c_driver cs35l41_i2c_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_i2c, 88 .probe = cs35l41_i2c_probe, 89 .remove = cs35l41_i2c_remove, 90}; 91 92module_i2c_driver(cs35l41_i2c_driver); 93 94MODULE_DESCRIPTION("I2C CS35L41 driver"); 95MODULE_AUTHOR("David Rhodes, Cirrus Logic Inc, <david.rhodes@cirrus.com>"); 96MODULE_LICENSE("GPL"); 97