Orange Pi5 kernel

// SPDX-License-Identifier: GPL-2.0-or-later
/*
 * Driver for the Analog Devices digital potentiometers (SPI bus)
 *
 * Copyright (C) 2010-2011 Michael Hennerich, Analog Devices Inc.
 */
 
#include <linux/spi/spi.h>
#include <linux/module.h>
 
#include "ad525x_dpot.h"
 
/* SPI bus functions */
static int write8(void *client, u8 val)
{
<------>u8 data = val;
 
<------>return spi_write(client, &data, 1);
}
 
static int write16(void *client, u8 reg, u8 val)
{
<------>u8 data[2] = {reg, val};
 
<------>return spi_write(client, data, 2);
}
 
static int write24(void *client, u8 reg, u16 val)
{
<------>u8 data[3] = {reg, val >> 8, val};
 
<------>return spi_write(client, data, 3);
}
 
static int read8(void *client)
{
<------>int ret;
<------>u8 data;
 
<------>ret = spi_read(client, &data, 1);
<------>if (ret < 0)
<------><------>return ret;
 
<------>return data;
}
 
static int read16(void *client, u8 reg)
{
<------>int ret;
<------>u8 buf_rx[2];
 
<------>write16(client, reg, 0);
<------>ret = spi_read(client, buf_rx, 2);
<------>if (ret < 0)
<------><------>return ret;
 
<------>return (buf_rx[0] << 8) |  buf_rx[1];
}
 
static int read24(void *client, u8 reg)
{
<------>int ret;
<------>u8 buf_rx[3];
 
<------>write24(client, reg, 0);
<------>ret = spi_read(client, buf_rx, 3);
<------>if (ret < 0)
<------><------>return ret;
 
<------>return (buf_rx[1] << 8) |  buf_rx[2];
}
 
static const struct ad_dpot_bus_ops bops = {
<------>.read_d8	= read8,
<------>.read_r8d8	= read16,
<------>.read_r8d16	= read24,
<------>.write_d8	= write8,
<------>.write_r8d8	= write16,
<------>.write_r8d16	= write24,
};
static int ad_dpot_spi_probe(struct spi_device *spi)
{
<------>struct ad_dpot_bus_data bdata = {
<------><------>.client = spi,
<------><------>.bops = &bops,
<------>};
 
<------>return ad_dpot_probe(&spi->dev, &bdata,
<------><------><------>     spi_get_device_id(spi)->driver_data,
<------><------><------>     spi_get_device_id(spi)->name);
}
 
static int ad_dpot_spi_remove(struct spi_device *spi)
{
<------>return ad_dpot_remove(&spi->dev);
}
 
static const struct spi_device_id ad_dpot_spi_id[] = {
<------>{"ad5160", AD5160_ID},
<------>{"ad5161", AD5161_ID},
<------>{"ad5162", AD5162_ID},
<------>{"ad5165", AD5165_ID},
<------>{"ad5200", AD5200_ID},
<------>{"ad5201", AD5201_ID},
<------>{"ad5203", AD5203_ID},
<------>{"ad5204", AD5204_ID},
<------>{"ad5206", AD5206_ID},
<------>{"ad5207", AD5207_ID},
<------>{"ad5231", AD5231_ID},
<------>{"ad5232", AD5232_ID},
<------>{"ad5233", AD5233_ID},
<------>{"ad5235", AD5235_ID},
<------>{"ad5260", AD5260_ID},
<------>{"ad5262", AD5262_ID},
<------>{"ad5263", AD5263_ID},
<------>{"ad5290", AD5290_ID},
<------>{"ad5291", AD5291_ID},
<------>{"ad5292", AD5292_ID},
<------>{"ad5293", AD5293_ID},
<------>{"ad7376", AD7376_ID},
<------>{"ad8400", AD8400_ID},
<------>{"ad8402", AD8402_ID},
<------>{"ad8403", AD8403_ID},
<------>{"adn2850", ADN2850_ID},
<------>{"ad5270", AD5270_ID},
<------>{"ad5271", AD5271_ID},
<------>{}
};
MODULE_DEVICE_TABLE(spi, ad_dpot_spi_id);
 
static struct spi_driver ad_dpot_spi_driver = {
<------>.driver = {
<------><------>.name	= "ad_dpot",
<------>},
<------>.probe		= ad_dpot_spi_probe,
<------>.remove		= ad_dpot_spi_remove,
<------>.id_table	= ad_dpot_spi_id,
};
 
module_spi_driver(ad_dpot_spi_driver);
 
MODULE_AUTHOR("Michael Hennerich <michael.hennerich@analog.com>");
MODULE_DESCRIPTION("digital potentiometer SPI bus driver");
MODULE_LICENSE("GPL");
MODULE_ALIAS("spi:ad_dpot");