mirror of
https://mirrors.bfsu.edu.cn/git/linux.git
synced 2024-11-18 17:54:13 +08:00
80503b23b2
Based on 1 normalized pattern(s): licensed under the gpl 2 or later extracted by the scancode license scanner the SPDX license identifier GPL-2.0-or-later has been chosen to replace the boilerplate/reference in 82 file(s). Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Allison Randal <allison@lohutok.net> Reviewed-by: Kate Stewart <kstewart@linuxfoundation.org> Reviewed-by: Richard Fontana <rfontana@redhat.com> Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190524100845.150836982@linutronix.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
146 lines
2.8 KiB
C
146 lines
2.8 KiB
C
// 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");
|