1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * AD5593R Digital <-> Analog converters driver 4 * 5 * Copyright 2015-2016 Analog Devices Inc. 6 * Author: Paul Cercueil <paul.cercueil@analog.com> 7 */ 8 9 #include "ad5592r-base.h" 10 11 #include <linux/bitops.h> 12 #include <linux/i2c.h> 13 #include <linux/module.h> 14 #include <linux/mod_devicetable.h> 15 16 #define AD5593R_MODE_CONF (0 << 4) 17 #define AD5593R_MODE_DAC_WRITE (1 << 4) 18 #define AD5593R_MODE_ADC_READBACK (4 << 4) 19 #define AD5593R_MODE_DAC_READBACK (5 << 4) 20 #define AD5593R_MODE_GPIO_READBACK (6 << 4) 21 #define AD5593R_MODE_REG_READBACK (7 << 4) 22 23 static int ad5593r_write_dac(struct ad5592r_state *st, unsigned chan, u16 value) 24 { 25 struct i2c_client *i2c = to_i2c_client(st->dev); 26 27 return i2c_smbus_write_word_swapped(i2c, 28 AD5593R_MODE_DAC_WRITE | chan, value); 29 } 30 31 static int ad5593r_read_adc(struct ad5592r_state *st, unsigned chan, u16 *value) 32 { 33 struct i2c_client *i2c = to_i2c_client(st->dev); 34 s32 val; 35 36 val = i2c_smbus_write_word_swapped(i2c, 37 AD5593R_MODE_CONF | AD5592R_REG_ADC_SEQ, BIT(chan)); 38 if (val < 0) 39 return (int) val; 40 41 val = i2c_smbus_read_word_swapped(i2c, AD5593R_MODE_ADC_READBACK); 42 if (val < 0) 43 return (int) val; 44 45 *value = (u16) val; 46 47 return 0; 48 } 49 50 static int ad5593r_reg_write(struct ad5592r_state *st, u8 reg, u16 value) 51 { 52 struct i2c_client *i2c = to_i2c_client(st->dev); 53 54 return i2c_smbus_write_word_swapped(i2c, 55 AD5593R_MODE_CONF | reg, value); 56 } 57 58 static int ad5593r_reg_read(struct ad5592r_state *st, u8 reg, u16 *value) 59 { 60 struct i2c_client *i2c = to_i2c_client(st->dev); 61 s32 val; 62 63 val = i2c_smbus_read_word_swapped(i2c, AD5593R_MODE_REG_READBACK | reg); 64 if (val < 0) 65 return (int) val; 66 67 *value = (u16) val; 68 69 return 0; 70 } 71 72 static int ad5593r_gpio_read(struct ad5592r_state *st, u8 *value) 73 { 74 struct i2c_client *i2c = to_i2c_client(st->dev); 75 s32 val; 76 77 val = i2c_smbus_read_word_swapped(i2c, AD5593R_MODE_GPIO_READBACK); 78 if (val < 0) 79 return (int) val; 80 81 *value = (u8) val; 82 83 return 0; 84 } 85 86 static const struct ad5592r_rw_ops ad5593r_rw_ops = { 87 .write_dac = ad5593r_write_dac, 88 .read_adc = ad5593r_read_adc, 89 .reg_write = ad5593r_reg_write, 90 .reg_read = ad5593r_reg_read, 91 .gpio_read = ad5593r_gpio_read, 92 }; 93 94 static int ad5593r_i2c_probe(struct i2c_client *i2c, 95 const struct i2c_device_id *id) 96 { 97 return ad5592r_probe(&i2c->dev, id->name, &ad5593r_rw_ops); 98 } 99 100 static int ad5593r_i2c_remove(struct i2c_client *i2c) 101 { 102 ad5592r_remove(&i2c->dev); 103 104 return 0; 105 } 106 107 static const struct i2c_device_id ad5593r_i2c_ids[] = { 108 { .name = "ad5593r", }, 109 {}, 110 }; 111 MODULE_DEVICE_TABLE(i2c, ad5593r_i2c_ids); 112 113 static const struct of_device_id ad5593r_of_match[] = { 114 { .compatible = "adi,ad5593r", }, 115 {}, 116 }; 117 MODULE_DEVICE_TABLE(of, ad5593r_of_match); 118 119 static const struct acpi_device_id ad5593r_acpi_match[] = { 120 {"ADS5593", }, 121 { }, 122 }; 123 MODULE_DEVICE_TABLE(acpi, ad5593r_acpi_match); 124 125 static struct i2c_driver ad5593r_driver = { 126 .driver = { 127 .name = "ad5593r", 128 .of_match_table = ad5593r_of_match, 129 .acpi_match_table = ad5593r_acpi_match, 130 }, 131 .probe = ad5593r_i2c_probe, 132 .remove = ad5593r_i2c_remove, 133 .id_table = ad5593r_i2c_ids, 134 }; 135 module_i2c_driver(ad5593r_driver); 136 137 MODULE_AUTHOR("Paul Cercueil <paul.cercueil@analog.com>"); 138 MODULE_DESCRIPTION("Analog Devices AD5593R multi-channel converters"); 139 MODULE_LICENSE("GPL v2"); 140 MODULE_IMPORT_NS(IIO_AD5592R); 141