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_device.h> 17 #include <linux/platform_device.h> 18 #include <linux/slab.h> 19 20 #include "cs35l41.h" 21 22 static const struct i2c_device_id cs35l41_id_i2c[] = { 23 { "cs35l40", 0 }, 24 { "cs35l41", 0 }, 25 { "cs35l51", 0 }, 26 { "cs35l53", 0 }, 27 {} 28 }; 29 30 MODULE_DEVICE_TABLE(i2c, cs35l41_id_i2c); 31 32 static int cs35l41_i2c_probe(struct i2c_client *client, 33 const struct i2c_device_id *id) 34 { 35 struct cs35l41_private *cs35l41; 36 struct device *dev = &client->dev; 37 struct cs35l41_platform_data *pdata = dev_get_platdata(dev); 38 const struct regmap_config *regmap_config = &cs35l41_regmap_i2c; 39 int ret; 40 41 cs35l41 = devm_kzalloc(dev, sizeof(struct cs35l41_private), GFP_KERNEL); 42 43 if (!cs35l41) 44 return -ENOMEM; 45 46 cs35l41->dev = dev; 47 cs35l41->irq = client->irq; 48 49 i2c_set_clientdata(client, cs35l41); 50 cs35l41->regmap = devm_regmap_init_i2c(client, regmap_config); 51 if (IS_ERR(cs35l41->regmap)) { 52 ret = PTR_ERR(cs35l41->regmap); 53 dev_err(cs35l41->dev, "Failed to allocate register map: %d\n", ret); 54 return ret; 55 } 56 57 return cs35l41_probe(cs35l41, pdata); 58 } 59 60 static int cs35l41_i2c_remove(struct i2c_client *client) 61 { 62 struct cs35l41_private *cs35l41 = i2c_get_clientdata(client); 63 64 cs35l41_remove(cs35l41); 65 66 return 0; 67 } 68 69 #ifdef CONFIG_OF 70 static const struct of_device_id cs35l41_of_match[] = { 71 { .compatible = "cirrus,cs35l40" }, 72 { .compatible = "cirrus,cs35l41" }, 73 {}, 74 }; 75 MODULE_DEVICE_TABLE(of, cs35l41_of_match); 76 #endif 77 78 #ifdef CONFIG_ACPI 79 static const struct acpi_device_id cs35l41_acpi_match[] = { 80 { "CSC3541", 0 }, /* Cirrus Logic PnP ID + part ID */ 81 {}, 82 }; 83 MODULE_DEVICE_TABLE(acpi, cs35l41_acpi_match); 84 #endif 85 86 static struct i2c_driver cs35l41_i2c_driver = { 87 .driver = { 88 .name = "cs35l41", 89 .pm = &cs35l41_pm_ops, 90 .of_match_table = of_match_ptr(cs35l41_of_match), 91 .acpi_match_table = ACPI_PTR(cs35l41_acpi_match), 92 }, 93 .id_table = cs35l41_id_i2c, 94 .probe = cs35l41_i2c_probe, 95 .remove = cs35l41_i2c_remove, 96 }; 97 98 module_i2c_driver(cs35l41_i2c_driver); 99 100 MODULE_DESCRIPTION("I2C CS35L41 driver"); 101 MODULE_AUTHOR("David Rhodes, Cirrus Logic Inc, <david.rhodes@cirrus.com>"); 102 MODULE_LICENSE("GPL"); 103