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1// SPDX-License-Identifier: GPL-2.02/*3 * AD5672R, AD5674R, AD5676, AD5676R, AD5679R,4 * AD5681R, AD5682R, AD5683, AD5683R, AD5684,5 * AD5684R, AD5685R, AD5686, AD5686R6 * Digital to analog converters driver7 *8 * Copyright 2018 Analog Devices Inc.9 */10 11#include "ad5686.h"12 13#include <linux/module.h>14#include <linux/spi/spi.h>15 16static int ad5686_spi_write(struct ad5686_state *st,17 u8 cmd, u8 addr, u16 val)18{19 struct spi_device *spi = to_spi_device(st->dev);20 u8 tx_len, *buf;21 22 switch (st->chip_info->regmap_type) {23 case AD5310_REGMAP:24 st->data[0].d16 = cpu_to_be16(AD5310_CMD(cmd) |25 val);26 buf = &st->data[0].d8[0];27 tx_len = 2;28 break;29 case AD5683_REGMAP:30 st->data[0].d32 = cpu_to_be32(AD5686_CMD(cmd) |31 AD5683_DATA(val));32 buf = &st->data[0].d8[1];33 tx_len = 3;34 break;35 case AD5686_REGMAP:36 st->data[0].d32 = cpu_to_be32(AD5686_CMD(cmd) |37 AD5686_ADDR(addr) |38 val);39 buf = &st->data[0].d8[1];40 tx_len = 3;41 break;42 default:43 return -EINVAL;44 }45 46 return spi_write(spi, buf, tx_len);47}48 49static int ad5686_spi_read(struct ad5686_state *st, u8 addr)50{51 struct spi_transfer t[] = {52 {53 .tx_buf = &st->data[0].d8[1],54 .len = 3,55 .cs_change = 1,56 }, {57 .tx_buf = &st->data[1].d8[1],58 .rx_buf = &st->data[2].d8[1],59 .len = 3,60 },61 };62 struct spi_device *spi = to_spi_device(st->dev);63 u8 cmd = 0;64 int ret;65 66 switch (st->chip_info->regmap_type) {67 case AD5310_REGMAP:68 return -ENOTSUPP;69 case AD5683_REGMAP:70 cmd = AD5686_CMD_READBACK_ENABLE_V2;71 break;72 case AD5686_REGMAP:73 cmd = AD5686_CMD_READBACK_ENABLE;74 break;75 default:76 return -EINVAL;77 }78 79 st->data[0].d32 = cpu_to_be32(AD5686_CMD(cmd) |80 AD5686_ADDR(addr));81 st->data[1].d32 = cpu_to_be32(AD5686_CMD(AD5686_CMD_NOOP));82 83 ret = spi_sync_transfer(spi, t, ARRAY_SIZE(t));84 if (ret < 0)85 return ret;86 87 return be32_to_cpu(st->data[2].d32);88}89 90static int ad5686_spi_probe(struct spi_device *spi)91{92 const struct spi_device_id *id = spi_get_device_id(spi);93 94 return ad5686_probe(&spi->dev, id->driver_data, id->name,95 ad5686_spi_write, ad5686_spi_read);96}97 98static void ad5686_spi_remove(struct spi_device *spi)99{100 ad5686_remove(&spi->dev);101}102 103static const struct spi_device_id ad5686_spi_id[] = {104 {"ad5310r", ID_AD5310R},105 {"ad5672r", ID_AD5672R},106 {"ad5674r", ID_AD5674R},107 {"ad5676", ID_AD5676},108 {"ad5676r", ID_AD5676R},109 {"ad5679r", ID_AD5679R},110 {"ad5681r", ID_AD5681R},111 {"ad5682r", ID_AD5682R},112 {"ad5683", ID_AD5683},113 {"ad5683r", ID_AD5683R},114 {"ad5684", ID_AD5684},115 {"ad5684r", ID_AD5684R},116 {"ad5685", ID_AD5685R}, /* Does not exist */117 {"ad5685r", ID_AD5685R},118 {"ad5686", ID_AD5686},119 {"ad5686r", ID_AD5686R},120 {}121};122MODULE_DEVICE_TABLE(spi, ad5686_spi_id);123 124static struct spi_driver ad5686_spi_driver = {125 .driver = {126 .name = "ad5686",127 },128 .probe = ad5686_spi_probe,129 .remove = ad5686_spi_remove,130 .id_table = ad5686_spi_id,131};132 133module_spi_driver(ad5686_spi_driver);134 135MODULE_AUTHOR("Stefan Popa <stefan.popa@analog.com>");136MODULE_DESCRIPTION("Analog Devices AD5686 and similar multi-channel DACs");137MODULE_LICENSE("GPL v2");138MODULE_IMPORT_NS(IIO_AD5686);139