1 // SPDX-License-Identifier: GPL-2.0 2 // 3 // Analog Devices ADAU7118 8 channel PDM-to-I2S/TDM Converter driver over I2C 4 // 5 // Copyright 2019 Analog Devices Inc. 6 7 #include <linux/i2c.h> 8 #include <linux/module.h> 9 #include <linux/regmap.h> 10 11 #include "adau7118.h" 12 13 static const struct reg_default adau7118_reg_defaults[] = { 14 { ADAU7118_REG_VENDOR_ID, 0x41 }, 15 { ADAU7118_REG_DEVICE_ID1, 0x71 }, 16 { ADAU7118_REG_DEVICE_ID2, 0x18 }, 17 { ADAU7118_REG_REVISION_ID, 0x00 }, 18 { ADAU7118_REG_ENABLES, 0x3F }, 19 { ADAU7118_REG_DEC_RATIO_CLK_MAP, 0xC0 }, 20 { ADAU7118_REG_HPF_CONTROL, 0xD0 }, 21 { ADAU7118_REG_SPT_CTRL1, 0x41 }, 22 { ADAU7118_REG_SPT_CTRL2, 0x00 }, 23 { ADAU7118_REG_SPT_CX(0), 0x01 }, 24 { ADAU7118_REG_SPT_CX(1), 0x11 }, 25 { ADAU7118_REG_SPT_CX(2), 0x21 }, 26 { ADAU7118_REG_SPT_CX(3), 0x31 }, 27 { ADAU7118_REG_SPT_CX(4), 0x41 }, 28 { ADAU7118_REG_SPT_CX(5), 0x51 }, 29 { ADAU7118_REG_SPT_CX(6), 0x61 }, 30 { ADAU7118_REG_SPT_CX(7), 0x71 }, 31 { ADAU7118_REG_DRIVE_STRENGTH, 0x2a }, 32 { ADAU7118_REG_RESET, 0x00 }, 33 }; 34 35 static bool adau7118_volatile(struct device *dev, unsigned int reg) 36 { 37 return (reg == ADAU7118_REG_RESET); 38 } 39 40 41 static const struct regmap_config adau7118_regmap_config = { 42 .reg_bits = 8, 43 .val_bits = 8, 44 .reg_defaults = adau7118_reg_defaults, 45 .num_reg_defaults = ARRAY_SIZE(adau7118_reg_defaults), 46 .cache_type = REGCACHE_RBTREE, 47 .max_register = ADAU7118_REG_RESET, 48 .volatile_reg = adau7118_volatile, 49 }; 50 51 static int adau7118_probe_i2c(struct i2c_client *i2c) 52 { 53 struct regmap *map; 54 55 map = devm_regmap_init_i2c(i2c, &adau7118_regmap_config); 56 if (IS_ERR(map)) { 57 dev_err(&i2c->dev, "Failed to init regmap %ld\n", PTR_ERR(map)); 58 return PTR_ERR(map); 59 } 60 61 return adau7118_probe(&i2c->dev, map, false); 62 } 63 64 static const struct of_device_id adau7118_of_match[] = { 65 { .compatible = "adi,adau7118" }, 66 {} 67 }; 68 MODULE_DEVICE_TABLE(of, adau7118_of_match); 69 70 static const struct i2c_device_id adau7118_id[] = { 71 {"adau7118", 0}, 72 {} 73 }; 74 MODULE_DEVICE_TABLE(i2c, adau7118_id); 75 76 static struct i2c_driver adau7118_driver = { 77 .driver = { 78 .name = "adau7118", 79 .of_match_table = adau7118_of_match, 80 }, 81 .probe = adau7118_probe_i2c, 82 .id_table = adau7118_id, 83 }; 84 module_i2c_driver(adau7118_driver); 85 86 MODULE_AUTHOR("Nuno Sa <nuno.sa@analog.com>"); 87 MODULE_DESCRIPTION("ADAU7118 8 channel PDM-to-I2S/TDM Converter driver over I2C"); 88 MODULE_LICENSE("GPL"); 89