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