1cbd5dd38SStefan Popa // SPDX-License-Identifier: GPL-2.0
20357e488SStefan Popa /*
3192778fbSMircea Caprioru * AD5672R, AD5674R, AD5676, AD5676R, AD5679R,
4192778fbSMircea Caprioru * AD5681R, AD5682R, AD5683, AD5683R, AD5684,
5192778fbSMircea Caprioru * AD5684R, AD5685R, AD5686, AD5686R
60357e488SStefan Popa * Digital to analog converters driver
70357e488SStefan Popa *
80357e488SStefan Popa * Copyright 2018 Analog Devices Inc.
90357e488SStefan Popa */
100357e488SStefan Popa
110357e488SStefan Popa #include "ad5686.h"
120357e488SStefan Popa
130357e488SStefan Popa #include <linux/module.h>
140357e488SStefan Popa #include <linux/spi/spi.h>
150357e488SStefan Popa
ad5686_spi_write(struct ad5686_state * st,u8 cmd,u8 addr,u16 val)160357e488SStefan Popa static int ad5686_spi_write(struct ad5686_state *st,
170357e488SStefan Popa u8 cmd, u8 addr, u16 val)
180357e488SStefan Popa {
190357e488SStefan Popa struct spi_device *spi = to_spi_device(st->dev);
201dbae4c6SStefan Popa u8 tx_len, *buf;
210357e488SStefan Popa
221dbae4c6SStefan Popa switch (st->chip_info->regmap_type) {
2312d323cfSStefan Popa case AD5310_REGMAP:
2412d323cfSStefan Popa st->data[0].d16 = cpu_to_be16(AD5310_CMD(cmd) |
2512d323cfSStefan Popa val);
2612d323cfSStefan Popa buf = &st->data[0].d8[0];
2712d323cfSStefan Popa tx_len = 2;
2812d323cfSStefan Popa break;
291dbae4c6SStefan Popa case AD5683_REGMAP:
301dbae4c6SStefan Popa st->data[0].d32 = cpu_to_be32(AD5686_CMD(cmd) |
311dbae4c6SStefan Popa AD5683_DATA(val));
321dbae4c6SStefan Popa buf = &st->data[0].d8[1];
331dbae4c6SStefan Popa tx_len = 3;
341dbae4c6SStefan Popa break;
351dbae4c6SStefan Popa case AD5686_REGMAP:
360357e488SStefan Popa st->data[0].d32 = cpu_to_be32(AD5686_CMD(cmd) |
370357e488SStefan Popa AD5686_ADDR(addr) |
380357e488SStefan Popa val);
391dbae4c6SStefan Popa buf = &st->data[0].d8[1];
401dbae4c6SStefan Popa tx_len = 3;
411dbae4c6SStefan Popa break;
421dbae4c6SStefan Popa default:
431dbae4c6SStefan Popa return -EINVAL;
441dbae4c6SStefan Popa }
450357e488SStefan Popa
461dbae4c6SStefan Popa return spi_write(spi, buf, tx_len);
470357e488SStefan Popa }
480357e488SStefan Popa
ad5686_spi_read(struct ad5686_state * st,u8 addr)490357e488SStefan Popa static int ad5686_spi_read(struct ad5686_state *st, u8 addr)
500357e488SStefan Popa {
510357e488SStefan Popa struct spi_transfer t[] = {
520357e488SStefan Popa {
530357e488SStefan Popa .tx_buf = &st->data[0].d8[1],
540357e488SStefan Popa .len = 3,
550357e488SStefan Popa .cs_change = 1,
560357e488SStefan Popa }, {
570357e488SStefan Popa .tx_buf = &st->data[1].d8[1],
580357e488SStefan Popa .rx_buf = &st->data[2].d8[1],
590357e488SStefan Popa .len = 3,
600357e488SStefan Popa },
610357e488SStefan Popa };
620357e488SStefan Popa struct spi_device *spi = to_spi_device(st->dev);
631dbae4c6SStefan Popa u8 cmd = 0;
640357e488SStefan Popa int ret;
650357e488SStefan Popa
6612d323cfSStefan Popa switch (st->chip_info->regmap_type) {
6712d323cfSStefan Popa case AD5310_REGMAP:
6812d323cfSStefan Popa return -ENOTSUPP;
6912d323cfSStefan Popa case AD5683_REGMAP:
701dbae4c6SStefan Popa cmd = AD5686_CMD_READBACK_ENABLE_V2;
7112d323cfSStefan Popa break;
7212d323cfSStefan Popa case AD5686_REGMAP:
7312d323cfSStefan Popa cmd = AD5686_CMD_READBACK_ENABLE;
7412d323cfSStefan Popa break;
7512d323cfSStefan Popa default:
7612d323cfSStefan Popa return -EINVAL;
7712d323cfSStefan Popa }
781dbae4c6SStefan Popa
791dbae4c6SStefan Popa st->data[0].d32 = cpu_to_be32(AD5686_CMD(cmd) |
800357e488SStefan Popa AD5686_ADDR(addr));
810357e488SStefan Popa st->data[1].d32 = cpu_to_be32(AD5686_CMD(AD5686_CMD_NOOP));
820357e488SStefan Popa
830357e488SStefan Popa ret = spi_sync_transfer(spi, t, ARRAY_SIZE(t));
840357e488SStefan Popa if (ret < 0)
850357e488SStefan Popa return ret;
860357e488SStefan Popa
870357e488SStefan Popa return be32_to_cpu(st->data[2].d32);
880357e488SStefan Popa }
890357e488SStefan Popa
ad5686_spi_probe(struct spi_device * spi)900357e488SStefan Popa static int ad5686_spi_probe(struct spi_device *spi)
910357e488SStefan Popa {
920357e488SStefan Popa const struct spi_device_id *id = spi_get_device_id(spi);
930357e488SStefan Popa
940357e488SStefan Popa return ad5686_probe(&spi->dev, id->driver_data, id->name,
950357e488SStefan Popa ad5686_spi_write, ad5686_spi_read);
960357e488SStefan Popa }
970357e488SStefan Popa
ad5686_spi_remove(struct spi_device * spi)980357e488SStefan Popa static void ad5686_spi_remove(struct spi_device *spi)
990357e488SStefan Popa {
1003ceed021SUwe Kleine-König ad5686_remove(&spi->dev);
1013ceed021SUwe Kleine-König }
1023ceed021SUwe Kleine-König
1030357e488SStefan Popa static const struct spi_device_id ad5686_spi_id[] = {
1040357e488SStefan Popa {"ad5310r", ID_AD5310R},
1050357e488SStefan Popa {"ad5672r", ID_AD5672R},
10612d323cfSStefan Popa {"ad5674r", ID_AD5674R},
1070357e488SStefan Popa {"ad5676", ID_AD5676},
108192778fbSMircea Caprioru {"ad5676r", ID_AD5676R},
1090357e488SStefan Popa {"ad5679r", ID_AD5679R},
1100357e488SStefan Popa {"ad5681r", ID_AD5681R},
111192778fbSMircea Caprioru {"ad5682r", ID_AD5682R},
1121dbae4c6SStefan Popa {"ad5683", ID_AD5683},
1131dbae4c6SStefan Popa {"ad5683r", ID_AD5683R},
1141dbae4c6SStefan Popa {"ad5684", ID_AD5684},
1151dbae4c6SStefan Popa {"ad5684r", ID_AD5684R},
1160357e488SStefan Popa {"ad5685", ID_AD5685R}, /* Does not exist */
1170357e488SStefan Popa {"ad5685r", ID_AD5685R},
1180357e488SStefan Popa {"ad5686", ID_AD5686},
1190357e488SStefan Popa {"ad5686r", ID_AD5686R},
1200357e488SStefan Popa {}
1210357e488SStefan Popa };
1220357e488SStefan Popa MODULE_DEVICE_TABLE(spi, ad5686_spi_id);
1230357e488SStefan Popa
1240357e488SStefan Popa static struct spi_driver ad5686_spi_driver = {
1250357e488SStefan Popa .driver = {
1260357e488SStefan Popa .name = "ad5686",
1270357e488SStefan Popa },
1280357e488SStefan Popa .probe = ad5686_spi_probe,
1290357e488SStefan Popa .remove = ad5686_spi_remove,
1300357e488SStefan Popa .id_table = ad5686_spi_id,
1310357e488SStefan Popa };
1320357e488SStefan Popa
1330357e488SStefan Popa module_spi_driver(ad5686_spi_driver);
1340357e488SStefan Popa
1350357e488SStefan Popa MODULE_AUTHOR("Stefan Popa <stefan.popa@analog.com>");
1360357e488SStefan Popa MODULE_DESCRIPTION("Analog Devices AD5686 and similar multi-channel DACs");
1370357e488SStefan Popa MODULE_LICENSE("GPL v2");
1380357e488SStefan Popa MODULE_IMPORT_NS(IIO_AD5686);
1390357e488SStefan Popa