| // SPDX-License-Identifier: GPL-2.0 |
| /* |
| * AD5672R, AD5674R, AD5676, AD5676R, AD5679R, |
| * AD5681R, AD5682R, AD5683, AD5683R, AD5684, |
| * AD5684R, AD5685R, AD5686, AD5686R |
| * Digital to analog converters driver |
| * |
| * Copyright 2018 Analog Devices Inc. |
| */ |
| |
| #include "ad5686.h" |
| |
| #include <linux/module.h> |
| #include <linux/spi/spi.h> |
| |
| static int ad5686_spi_write(struct ad5686_state *st, |
| u8 cmd, u8 addr, u16 val) |
| { |
| struct spi_device *spi = to_spi_device(st->dev); |
| u8 tx_len, *buf; |
| |
| switch (st->chip_info->regmap_type) { |
| case AD5310_REGMAP: |
| st->data[0].d16 = cpu_to_be16(AD5310_CMD(cmd) | |
| val); |
| buf = &st->data[0].d8[0]; |
| tx_len = 2; |
| break; |
| case AD5683_REGMAP: |
| st->data[0].d32 = cpu_to_be32(AD5686_CMD(cmd) | |
| AD5683_DATA(val)); |
| buf = &st->data[0].d8[1]; |
| tx_len = 3; |
| break; |
| case AD5686_REGMAP: |
| st->data[0].d32 = cpu_to_be32(AD5686_CMD(cmd) | |
| AD5686_ADDR(addr) | |
| val); |
| buf = &st->data[0].d8[1]; |
| tx_len = 3; |
| break; |
| default: |
| return -EINVAL; |
| } |
| |
| return spi_write(spi, buf, tx_len); |
| } |
| |
| static int ad5686_spi_read(struct ad5686_state *st, u8 addr) |
| { |
| struct spi_transfer t[] = { |
| { |
| .tx_buf = &st->data[0].d8[1], |
| .len = 3, |
| .cs_change = 1, |
| }, { |
| .tx_buf = &st->data[1].d8[1], |
| .rx_buf = &st->data[2].d8[1], |
| .len = 3, |
| }, |
| }; |
| struct spi_device *spi = to_spi_device(st->dev); |
| u8 cmd = 0; |
| int ret; |
| |
| switch (st->chip_info->regmap_type) { |
| case AD5310_REGMAP: |
| return -ENOTSUPP; |
| case AD5683_REGMAP: |
| cmd = AD5686_CMD_READBACK_ENABLE_V2; |
| break; |
| case AD5686_REGMAP: |
| cmd = AD5686_CMD_READBACK_ENABLE; |
| break; |
| default: |
| return -EINVAL; |
| } |
| |
| st->data[0].d32 = cpu_to_be32(AD5686_CMD(cmd) | |
| AD5686_ADDR(addr)); |
| st->data[1].d32 = cpu_to_be32(AD5686_CMD(AD5686_CMD_NOOP)); |
| |
| ret = spi_sync_transfer(spi, t, ARRAY_SIZE(t)); |
| if (ret < 0) |
| return ret; |
| |
| return be32_to_cpu(st->data[2].d32); |
| } |
| |
| static int ad5686_spi_probe(struct spi_device *spi) |
| { |
| const struct spi_device_id *id = spi_get_device_id(spi); |
| |
| return ad5686_probe(&spi->dev, id->driver_data, id->name, |
| ad5686_spi_write, ad5686_spi_read); |
| } |
| |
| static void ad5686_spi_remove(struct spi_device *spi) |
| { |
| ad5686_remove(&spi->dev); |
| } |
| |
| static const struct spi_device_id ad5686_spi_id[] = { |
| {"ad5310r", ID_AD5310R}, |
| {"ad5672r", ID_AD5672R}, |
| {"ad5674r", ID_AD5674R}, |
| {"ad5676", ID_AD5676}, |
| {"ad5676r", ID_AD5676R}, |
| {"ad5679r", ID_AD5679R}, |
| {"ad5681r", ID_AD5681R}, |
| {"ad5682r", ID_AD5682R}, |
| {"ad5683", ID_AD5683}, |
| {"ad5683r", ID_AD5683R}, |
| {"ad5684", ID_AD5684}, |
| {"ad5684r", ID_AD5684R}, |
| {"ad5685", ID_AD5685R}, /* Does not exist */ |
| {"ad5685r", ID_AD5685R}, |
| {"ad5686", ID_AD5686}, |
| {"ad5686r", ID_AD5686R}, |
| {} |
| }; |
| MODULE_DEVICE_TABLE(spi, ad5686_spi_id); |
| |
| static struct spi_driver ad5686_spi_driver = { |
| .driver = { |
| .name = "ad5686", |
| }, |
| .probe = ad5686_spi_probe, |
| .remove = ad5686_spi_remove, |
| .id_table = ad5686_spi_id, |
| }; |
| |
| module_spi_driver(ad5686_spi_driver); |
| |
| MODULE_AUTHOR("Stefan Popa <stefan.popa@analog.com>"); |
| MODULE_DESCRIPTION("Analog Devices AD5686 and similar multi-channel DACs"); |
| MODULE_LICENSE("GPL v2"); |
| MODULE_IMPORT_NS(IIO_AD5686); |