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beee7890c3
Up to now adt7x10_remove() returns zero unconditionally. Make it return void instead which makes it easier to see in the callers that there is no error to handle. Also the return value of i2c and spi remove callbacks is ignored anyway. Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de> Link: https://lore.kernel.org/r/20211011132754.2479853-3-u.kleine-koenig@pengutronix.de Signed-off-by: Guenter Roeck <linux@roeck-us.net>
117 lines
2.8 KiB
C
117 lines
2.8 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* ADT7310/ADT7310 digital temperature sensor driver
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*
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* Copyright 2012-2013 Analog Devices Inc.
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* Author: Lars-Peter Clausen <lars@metafoo.de>
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*/
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#include <linux/module.h>
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#include <linux/init.h>
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#include <linux/spi/spi.h>
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#include <asm/unaligned.h>
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#include "adt7x10.h"
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#define ADT7310_STATUS 0
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#define ADT7310_CONFIG 1
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#define ADT7310_TEMPERATURE 2
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#define ADT7310_ID 3
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#define ADT7310_T_CRIT 4
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#define ADT7310_T_HYST 5
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#define ADT7310_T_ALARM_HIGH 6
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#define ADT7310_T_ALARM_LOW 7
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static const u8 adt7310_reg_table[] = {
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[ADT7X10_TEMPERATURE] = ADT7310_TEMPERATURE,
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[ADT7X10_STATUS] = ADT7310_STATUS,
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[ADT7X10_CONFIG] = ADT7310_CONFIG,
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[ADT7X10_T_ALARM_HIGH] = ADT7310_T_ALARM_HIGH,
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[ADT7X10_T_ALARM_LOW] = ADT7310_T_ALARM_LOW,
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[ADT7X10_T_CRIT] = ADT7310_T_CRIT,
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[ADT7X10_T_HYST] = ADT7310_T_HYST,
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[ADT7X10_ID] = ADT7310_ID,
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};
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#define ADT7310_CMD_REG_OFFSET 3
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#define ADT7310_CMD_READ 0x40
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#define AD7310_COMMAND(reg) (adt7310_reg_table[(reg)] << ADT7310_CMD_REG_OFFSET)
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static int adt7310_spi_read_word(struct device *dev, u8 reg)
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{
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struct spi_device *spi = to_spi_device(dev);
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return spi_w8r16be(spi, AD7310_COMMAND(reg) | ADT7310_CMD_READ);
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}
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static int adt7310_spi_write_word(struct device *dev, u8 reg, u16 data)
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{
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struct spi_device *spi = to_spi_device(dev);
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u8 buf[3];
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buf[0] = AD7310_COMMAND(reg);
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put_unaligned_be16(data, &buf[1]);
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return spi_write(spi, buf, sizeof(buf));
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}
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static int adt7310_spi_read_byte(struct device *dev, u8 reg)
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{
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struct spi_device *spi = to_spi_device(dev);
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return spi_w8r8(spi, AD7310_COMMAND(reg) | ADT7310_CMD_READ);
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}
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static int adt7310_spi_write_byte(struct device *dev, u8 reg,
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u8 data)
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{
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struct spi_device *spi = to_spi_device(dev);
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u8 buf[2];
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buf[0] = AD7310_COMMAND(reg);
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buf[1] = data;
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return spi_write(spi, buf, sizeof(buf));
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}
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static const struct adt7x10_ops adt7310_spi_ops = {
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.read_word = adt7310_spi_read_word,
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.write_word = adt7310_spi_write_word,
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.read_byte = adt7310_spi_read_byte,
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.write_byte = adt7310_spi_write_byte,
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};
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static int adt7310_spi_probe(struct spi_device *spi)
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{
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return adt7x10_probe(&spi->dev, spi_get_device_id(spi)->name, spi->irq,
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&adt7310_spi_ops);
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}
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static int adt7310_spi_remove(struct spi_device *spi)
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{
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adt7x10_remove(&spi->dev, spi->irq);
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return 0;
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}
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static const struct spi_device_id adt7310_id[] = {
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{ "adt7310", 0 },
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{ "adt7320", 0 },
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{}
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};
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MODULE_DEVICE_TABLE(spi, adt7310_id);
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static struct spi_driver adt7310_driver = {
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.driver = {
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.name = "adt7310",
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.pm = ADT7X10_DEV_PM_OPS,
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},
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.probe = adt7310_spi_probe,
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.remove = adt7310_spi_remove,
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.id_table = adt7310_id,
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};
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module_spi_driver(adt7310_driver);
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MODULE_AUTHOR("Lars-Peter Clausen <lars@metafoo.de>");
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MODULE_DESCRIPTION("ADT7310/ADT7320 driver");
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MODULE_LICENSE("GPL");
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