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 <sound/cs35l41.h> 21 #include "cs35l41.h" 22 23 static struct regmap_config cs35l41_regmap_i2c = { 24 .reg_bits = 32, 25 .val_bits = 32, 26 .reg_stride = CS35L41_REGSTRIDE, 27 .reg_format_endian = REGMAP_ENDIAN_BIG, 28 .val_format_endian = REGMAP_ENDIAN_BIG, 29 .max_register = CS35L41_LASTREG, 30 .reg_defaults = cs35l41_reg, 31 .num_reg_defaults = ARRAY_SIZE(cs35l41_reg), 32 .volatile_reg = cs35l41_volatile_reg, 33 .readable_reg = cs35l41_readable_reg, 34 .precious_reg = cs35l41_precious_reg, 35 .cache_type = REGCACHE_RBTREE, 36 }; 37 38 static const struct i2c_device_id cs35l41_id_i2c[] = { 39 { "cs35l40", 0 }, 40 { "cs35l41", 0 }, 41 {} 42 }; 43 44 MODULE_DEVICE_TABLE(i2c, cs35l41_id_i2c); 45 46 static int cs35l41_i2c_probe(struct i2c_client *client, 47 const struct i2c_device_id *id) 48 { 49 struct cs35l41_private *cs35l41; 50 struct device *dev = &client->dev; 51 struct cs35l41_platform_data *pdata = dev_get_platdata(dev); 52 const struct regmap_config *regmap_config = &cs35l41_regmap_i2c; 53 int ret; 54 55 cs35l41 = devm_kzalloc(dev, sizeof(struct cs35l41_private), GFP_KERNEL); 56 57 if (!cs35l41) 58 return -ENOMEM; 59 60 cs35l41->dev = dev; 61 cs35l41->irq = client->irq; 62 63 i2c_set_clientdata(client, cs35l41); 64 cs35l41->regmap = devm_regmap_init_i2c(client, regmap_config); 65 if (IS_ERR(cs35l41->regmap)) { 66 ret = PTR_ERR(cs35l41->regmap); 67 dev_err(cs35l41->dev, "Failed to allocate register map: %d\n", ret); 68 return ret; 69 } 70 71 return cs35l41_probe(cs35l41, pdata); 72 } 73 74 static int cs35l41_i2c_remove(struct i2c_client *client) 75 { 76 struct cs35l41_private *cs35l41 = i2c_get_clientdata(client); 77 78 cs35l41_remove(cs35l41); 79 80 return 0; 81 } 82 83 #ifdef CONFIG_OF 84 static const struct of_device_id cs35l41_of_match[] = { 85 { .compatible = "cirrus,cs35l40" }, 86 { .compatible = "cirrus,cs35l41" }, 87 {}, 88 }; 89 MODULE_DEVICE_TABLE(of, cs35l41_of_match); 90 #endif 91 92 #ifdef CONFIG_ACPI 93 static const struct acpi_device_id cs35l41_acpi_match[] = { 94 { "CSC3541", 0 }, /* Cirrus Logic PnP ID + part ID */ 95 {}, 96 }; 97 MODULE_DEVICE_TABLE(acpi, cs35l41_acpi_match); 98 #endif 99 100 static struct i2c_driver cs35l41_i2c_driver = { 101 .driver = { 102 .name = "cs35l41", 103 .of_match_table = of_match_ptr(cs35l41_of_match), 104 .acpi_match_table = ACPI_PTR(cs35l41_acpi_match), 105 }, 106 .id_table = cs35l41_id_i2c, 107 .probe = cs35l41_i2c_probe, 108 .remove = cs35l41_i2c_remove, 109 }; 110 111 module_i2c_driver(cs35l41_i2c_driver); 112 113 MODULE_DESCRIPTION("I2C CS35L41 driver"); 114 MODULE_AUTHOR("David Rhodes, Cirrus Logic Inc, <david.rhodes@cirrus.com>"); 115 MODULE_LICENSE("GPL"); 116