^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) // SPDX-License-Identifier: GPL-2.0-or-later
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) * Driver for the Analog Devices digital potentiometers (SPI bus)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) * Copyright (C) 2010-2011 Michael Hennerich, Analog Devices Inc.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) #include <linux/spi/spi.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) #include "ad525x_dpot.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) /* SPI bus functions */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) static int write8(void *client, u8 val)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) u8 data = val;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) return spi_write(client, &data, 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) static int write16(void *client, u8 reg, u8 val)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) u8 data[2] = {reg, val};
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) return spi_write(client, data, 2);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) static int write24(void *client, u8 reg, u16 val)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) u8 data[3] = {reg, val >> 8, val};
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) return spi_write(client, data, 3);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) static int read8(void *client)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) u8 data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) ret = spi_read(client, &data, 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) if (ret < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) return data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) static int read16(void *client, u8 reg)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) u8 buf_rx[2];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) write16(client, reg, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) ret = spi_read(client, buf_rx, 2);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) if (ret < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) return (buf_rx[0] << 8) | buf_rx[1];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) static int read24(void *client, u8 reg)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) u8 buf_rx[3];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) write24(client, reg, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) ret = spi_read(client, buf_rx, 3);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) if (ret < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) return (buf_rx[1] << 8) | buf_rx[2];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) static const struct ad_dpot_bus_ops bops = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) .read_d8 = read8,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) .read_r8d8 = read16,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) .read_r8d16 = read24,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) .write_d8 = write8,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) .write_r8d8 = write16,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) .write_r8d16 = write24,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) static int ad_dpot_spi_probe(struct spi_device *spi)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) struct ad_dpot_bus_data bdata = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) .client = spi,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) .bops = &bops,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) return ad_dpot_probe(&spi->dev, &bdata,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) spi_get_device_id(spi)->driver_data,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) spi_get_device_id(spi)->name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) static int ad_dpot_spi_remove(struct spi_device *spi)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) return ad_dpot_remove(&spi->dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) static const struct spi_device_id ad_dpot_spi_id[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) {"ad5160", AD5160_ID},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) {"ad5161", AD5161_ID},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) {"ad5162", AD5162_ID},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) {"ad5165", AD5165_ID},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) {"ad5200", AD5200_ID},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) {"ad5201", AD5201_ID},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) {"ad5203", AD5203_ID},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) {"ad5204", AD5204_ID},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) {"ad5206", AD5206_ID},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) {"ad5207", AD5207_ID},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) {"ad5231", AD5231_ID},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) {"ad5232", AD5232_ID},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) {"ad5233", AD5233_ID},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) {"ad5235", AD5235_ID},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) {"ad5260", AD5260_ID},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) {"ad5262", AD5262_ID},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) {"ad5263", AD5263_ID},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) {"ad5290", AD5290_ID},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) {"ad5291", AD5291_ID},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) {"ad5292", AD5292_ID},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) {"ad5293", AD5293_ID},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) {"ad7376", AD7376_ID},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) {"ad8400", AD8400_ID},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) {"ad8402", AD8402_ID},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) {"ad8403", AD8403_ID},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) {"adn2850", ADN2850_ID},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) {"ad5270", AD5270_ID},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) {"ad5271", AD5271_ID},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) {}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) MODULE_DEVICE_TABLE(spi, ad_dpot_spi_id);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) static struct spi_driver ad_dpot_spi_driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) .driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) .name = "ad_dpot",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) .probe = ad_dpot_spi_probe,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) .remove = ad_dpot_spi_remove,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) .id_table = ad_dpot_spi_id,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) module_spi_driver(ad_dpot_spi_driver);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) MODULE_AUTHOR("Michael Hennerich <michael.hennerich@analog.com>");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) MODULE_DESCRIPTION("digital potentiometer SPI bus driver");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) MODULE_LICENSE("GPL");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) MODULE_ALIAS("spi:ad_dpot");
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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