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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
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/*
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* Analog Devices LTC2947 high precision power and energy monitor over SPI
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*
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* Copyright 2019 Analog Devices Inc.
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*/
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#include <linux/module.h>
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#include <linux/of.h>
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#include <linux/regmap.h>
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#include <linux/spi/spi.h>
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#include "ltc2947.h"
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static const struct regmap_config ltc2947_regmap_config = {
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.reg_bits = 16,
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.val_bits = 8,
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.read_flag_mask = BIT(0),
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};
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static int ltc2947_probe(struct spi_device *spi)
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{
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struct regmap *map;
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map = devm_regmap_init_spi(spi, <c2947_regmap_config);
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if (IS_ERR(map))
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return PTR_ERR(map);
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return ltc2947_core_probe(map, spi_get_device_id(spi)->name);
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}
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static const struct spi_device_id ltc2947_id[] = {
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{"ltc2947", 0},
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{}
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};
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MODULE_DEVICE_TABLE(spi, ltc2947_id);
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static struct spi_driver ltc2947_driver = {
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.driver = {
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.name = "ltc2947",
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.of_match_table = ltc2947_of_match,
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.pm = <c2947_pm_ops,
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},
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.probe = ltc2947_probe,
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.id_table = ltc2947_id,
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};
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module_spi_driver(ltc2947_driver);
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MODULE_AUTHOR("Nuno Sa <nuno.sa@analog.com>");
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MODULE_DESCRIPTION("LTC2947 SPI power and energy monitor driver");
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MODULE_LICENSE("GPL");
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