mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-25 21:54:06 +08:00
d8084a048c
AD5311R is a single channel DAC with 10-bit precision and i2c interface. The device includes a 2.5V internal reference which is enabled by default. This device is similar to AD5691R/AD5692R/AD5693/AD5693R, the only difference is that it has 10-bit precision. Datasheet: http://www.analog.com/media/en/technical-documentation/data-sheets/AD5310R_5311R.pdf Signed-off-by: Stefan Popa <stefan.popa@analog.com> Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
104 lines
2.3 KiB
C
104 lines
2.3 KiB
C
// SPDX-License-Identifier: GPL-2.0+
|
|
/*
|
|
* AD5671R, AD5675R, AD5691R, AD5692R, AD5693, AD5693R,
|
|
* AD5694, AD5694R, AD5695R, AD5696, AD5696R
|
|
* Digital to analog converters driver
|
|
*
|
|
* Copyright 2018 Analog Devices Inc.
|
|
*/
|
|
|
|
#include "ad5686.h"
|
|
|
|
#include <linux/module.h>
|
|
#include <linux/i2c.h>
|
|
|
|
static int ad5686_i2c_read(struct ad5686_state *st, u8 addr)
|
|
{
|
|
struct i2c_client *i2c = to_i2c_client(st->dev);
|
|
struct i2c_msg msg[2] = {
|
|
{
|
|
.addr = i2c->addr,
|
|
.flags = i2c->flags,
|
|
.len = 3,
|
|
.buf = &st->data[0].d8[1],
|
|
},
|
|
{
|
|
.addr = i2c->addr,
|
|
.flags = i2c->flags | I2C_M_RD,
|
|
.len = 2,
|
|
.buf = (char *)&st->data[0].d16,
|
|
},
|
|
};
|
|
int ret;
|
|
|
|
st->data[0].d32 = cpu_to_be32(AD5686_CMD(AD5686_CMD_NOOP) |
|
|
AD5686_ADDR(addr) |
|
|
0x00);
|
|
|
|
ret = i2c_transfer(i2c->adapter, msg, 2);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
return be16_to_cpu(st->data[0].d16);
|
|
}
|
|
|
|
static int ad5686_i2c_write(struct ad5686_state *st,
|
|
u8 cmd, u8 addr, u16 val)
|
|
{
|
|
struct i2c_client *i2c = to_i2c_client(st->dev);
|
|
int ret;
|
|
|
|
st->data[0].d32 = cpu_to_be32(AD5686_CMD(cmd) | AD5686_ADDR(addr)
|
|
| val);
|
|
|
|
ret = i2c_master_send(i2c, &st->data[0].d8[1], 3);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
return (ret != 3) ? -EIO : 0;
|
|
}
|
|
|
|
static int ad5686_i2c_probe(struct i2c_client *i2c,
|
|
const struct i2c_device_id *id)
|
|
{
|
|
return ad5686_probe(&i2c->dev, id->driver_data, id->name,
|
|
ad5686_i2c_write, ad5686_i2c_read);
|
|
}
|
|
|
|
static int ad5686_i2c_remove(struct i2c_client *i2c)
|
|
{
|
|
return ad5686_remove(&i2c->dev);
|
|
}
|
|
|
|
static const struct i2c_device_id ad5686_i2c_id[] = {
|
|
{"ad5311r", ID_AD5311R},
|
|
{"ad5671r", ID_AD5671R},
|
|
{"ad5675r", ID_AD5675R},
|
|
{"ad5691r", ID_AD5691R},
|
|
{"ad5692r", ID_AD5692R},
|
|
{"ad5693", ID_AD5693},
|
|
{"ad5693r", ID_AD5693R},
|
|
{"ad5694", ID_AD5694},
|
|
{"ad5694r", ID_AD5694R},
|
|
{"ad5695r", ID_AD5695R},
|
|
{"ad5696", ID_AD5696},
|
|
{"ad5696r", ID_AD5696R},
|
|
{}
|
|
};
|
|
MODULE_DEVICE_TABLE(i2c, ad5686_i2c_id);
|
|
|
|
static struct i2c_driver ad5686_i2c_driver = {
|
|
.driver = {
|
|
.name = "ad5696",
|
|
},
|
|
.probe = ad5686_i2c_probe,
|
|
.remove = ad5686_i2c_remove,
|
|
.id_table = ad5686_i2c_id,
|
|
};
|
|
|
|
module_i2c_driver(ad5686_i2c_driver);
|
|
|
|
MODULE_AUTHOR("Stefan Popa <stefan.popa@analog.com>");
|
|
MODULE_DESCRIPTION("Analog Devices AD5686 and similar multi-channel DACs");
|
|
MODULE_LICENSE("GPL v2");
|