mirror of
https://mirrors.bfsu.edu.cn/git/linux.git
synced 2024-12-14 06:24:53 +08:00
9f90fd652b
The ltc2947 is a high precision power and energy monitor with an internal sense resistor supporting up to +/- 30A. Three internal no Latency ADCs ensure accurate measurement of voltage and current, while high-bandwidth analog multiplication of voltage and current provides accurate power measurement in a wide range of applications. Internal or external clocking options enable precise charge and energy measurements. Signed-off-by: Nuno Sá <nuno.sa@analog.com> Link: https://lore.kernel.org/r/20191021154115.319073-1-nuno.sa@analog.com [groeck: Removed unnecessary checks when reading temperature and energy; PAGE{0,1} -> LTC2947_PAGE_{0,1}] Signed-off-by: Guenter Roeck <linux@roeck-us.net>
51 lines
1.1 KiB
C
51 lines
1.1 KiB
C
// SPDX-License-Identifier: GPL-2.0
|
|
/*
|
|
* Analog Devices LTC2947 high precision power and energy monitor over SPI
|
|
*
|
|
* Copyright 2019 Analog Devices Inc.
|
|
*/
|
|
#include <linux/module.h>
|
|
#include <linux/of.h>
|
|
#include <linux/regmap.h>
|
|
#include <linux/spi/spi.h>
|
|
|
|
#include "ltc2947.h"
|
|
|
|
static const struct regmap_config ltc2947_regmap_config = {
|
|
.reg_bits = 16,
|
|
.val_bits = 8,
|
|
.read_flag_mask = BIT(0),
|
|
};
|
|
|
|
static int ltc2947_probe(struct spi_device *spi)
|
|
{
|
|
struct regmap *map;
|
|
|
|
map = devm_regmap_init_spi(spi, <c2947_regmap_config);
|
|
if (IS_ERR(map))
|
|
return PTR_ERR(map);
|
|
|
|
return ltc2947_core_probe(map, spi_get_device_id(spi)->name);
|
|
}
|
|
|
|
static const struct spi_device_id ltc2947_id[] = {
|
|
{"ltc2947", 0},
|
|
{}
|
|
};
|
|
MODULE_DEVICE_TABLE(spi, ltc2947_id);
|
|
|
|
static struct spi_driver ltc2947_driver = {
|
|
.driver = {
|
|
.name = "ltc2947",
|
|
.of_match_table = ltc2947_of_match,
|
|
.pm = <c2947_pm_ops,
|
|
},
|
|
.probe = ltc2947_probe,
|
|
.id_table = ltc2947_id,
|
|
};
|
|
module_spi_driver(ltc2947_driver);
|
|
|
|
MODULE_AUTHOR("Nuno Sa <nuno.sa@analog.com>");
|
|
MODULE_DESCRIPTION("LTC2947 SPI power and energy monitor driver");
|
|
MODULE_LICENSE("GPL");
|