projects / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| cbd5dd38 | 1 | // SPDX-License-Identifier: GPL-2.0 |
| 4177381b | 2 | /* |
| be1b24d2 SP |
3 | * AD5671R, AD5675R, AD5691R, AD5692R, AD5693, AD5693R, |
| 4 | * AD5694, AD5694R, AD5695R, AD5696, AD5696R | |
| 4177381b SP |
5 | * Digital to analog converters driver |
| 6 | * | |
| 7 | * Copyright 2018 Analog Devices Inc. | |
| 8 | */ | |
| 9 | ||
| 10 | #include "ad5686.h" | |
| 11 | ||
| 12 | #include <linux/module.h> | |
| 13 | #include <linux/i2c.h> | |
| 14 | ||
| 15 | static int ad5686_i2c_read(struct ad5686_state *st, u8 addr) | |
| 16 | { | |
| 17 | struct i2c_client *i2c = to_i2c_client(st->dev); | |
| 18 | struct i2c_msg msg[2] = { | |
| 19 | { | |
| 20 | .addr = i2c->addr, | |
| 21 | .flags = i2c->flags, | |
| 22 | .len = 3, | |
| 23 | .buf = &st->data[0].d8[1], | |
| 24 | }, | |
| 25 | { | |
| 26 | .addr = i2c->addr, | |
| 27 | .flags = i2c->flags | I2C_M_RD, | |
| 28 | .len = 2, | |
| 29 | .buf = (char *)&st->data[0].d16, | |
| 30 | }, | |
| 31 | }; | |
| 32 | int ret; | |
| 33 | ||
| 34 | st->data[0].d32 = cpu_to_be32(AD5686_CMD(AD5686_CMD_NOOP) | | |
| 35 | AD5686_ADDR(addr) | | |
| 36 | 0x00); | |
| 37 | ||
| 38 | ret = i2c_transfer(i2c->adapter, msg, 2); | |
| 39 | if (ret < 0) | |
| 40 | return ret; | |
| 41 | ||
| 42 | return be16_to_cpu(st->data[0].d16); | |
| 43 | } | |
| 44 | ||
| 45 | static int ad5686_i2c_write(struct ad5686_state *st, | |
| 46 | u8 cmd, u8 addr, u16 val) | |
| 47 | { | |
| 48 | struct i2c_client *i2c = to_i2c_client(st->dev); | |
| 49 | int ret; | |
| 50 | ||
| 51 | st->data[0].d32 = cpu_to_be32(AD5686_CMD(cmd) | AD5686_ADDR(addr) | |
| 52 | | val); | |
| 53 | ||
| 54 | ret = i2c_master_send(i2c, &st->data[0].d8[1], 3); | |
| 55 | if (ret < 0) | |
| 56 | return ret; | |
| 57 | ||
| 58 | return (ret != 3) ? -EIO : 0; | |
| 59 | } | |
| 60 | ||
| 61 | static int ad5686_i2c_probe(struct i2c_client *i2c, | |
| 62 | const struct i2c_device_id *id) | |
| 63 | { | |
| 64 | return ad5686_probe(&i2c->dev, id->driver_data, id->name, | |
| 65 | ad5686_i2c_write, ad5686_i2c_read); | |
| 66 | } | |
| 67 | ||
| 68 | static int ad5686_i2c_remove(struct i2c_client *i2c) | |
| 69 | { | |
| 70 | return ad5686_remove(&i2c->dev); | |
| 71 | } | |
| 72 | ||
| 73 | static const struct i2c_device_id ad5686_i2c_id[] = { | |
| d8084a04 | 74 | {"ad5311r", ID_AD5311R}, |
| 4177381b SP |
75 | {"ad5671r", ID_AD5671R}, |
| 76 | {"ad5675r", ID_AD5675R}, | |
| be1b24d2 SP |
77 | {"ad5691r", ID_AD5691R}, |
| 78 | {"ad5692r", ID_AD5692R}, | |
| 79 | {"ad5693", ID_AD5693}, | |
| 80 | {"ad5693r", ID_AD5693R}, | |
| 4177381b SP |
81 | {"ad5694", ID_AD5694}, |
| 82 | {"ad5694r", ID_AD5694R}, | |
| 83 | {"ad5695r", ID_AD5695R}, | |
| 84 | {"ad5696", ID_AD5696}, | |
| 85 | {"ad5696r", ID_AD5696R}, | |
| 86 | {} | |
| 87 | }; | |
| 88 | MODULE_DEVICE_TABLE(i2c, ad5686_i2c_id); | |
| 89 | ||
| 90 | static struct i2c_driver ad5686_i2c_driver = { | |
| 91 | .driver = { | |
| 92 | .name = "ad5696", | |
| 93 | }, | |
| 94 | .probe = ad5686_i2c_probe, | |
| 95 | .remove = ad5686_i2c_remove, | |
| 96 | .id_table = ad5686_i2c_id, | |
| 97 | }; | |
| 98 | ||
| 99 | module_i2c_driver(ad5686_i2c_driver); | |
| 100 | ||
| 101 | MODULE_AUTHOR("Stefan Popa <[email protected]>"); | |
| 102 | MODULE_DESCRIPTION("Analog Devices AD5686 and similar multi-channel DACs"); | |
| 103 | MODULE_LICENSE("GPL v2"); |