projects / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| 80503b23 | 1 | // SPDX-License-Identifier: GPL-2.0-or-later |
| 51c2a487 LPC |
2 | /* |
| 3 | * ADT7310/ADT7310 digital temperature sensor driver | |
| 4 | * | |
| 5 | * Copyright 2012-2013 Analog Devices Inc. | |
| 6 | * Author: Lars-Peter Clausen <[email protected]> | |
| 51c2a487 LPC |
7 | */ |
| 8 | ||
| 9 | #include <linux/module.h> | |
| 10 | #include <linux/init.h> | |
| 11 | #include <linux/spi/spi.h> | |
| 12 | #include <asm/unaligned.h> | |
| 13 | ||
| 14 | #include "adt7x10.h" | |
| 15 | ||
| 16 | #define ADT7310_STATUS 0 | |
| 17 | #define ADT7310_CONFIG 1 | |
| 18 | #define ADT7310_TEMPERATURE 2 | |
| 19 | #define ADT7310_ID 3 | |
| 20 | #define ADT7310_T_CRIT 4 | |
| 21 | #define ADT7310_T_HYST 5 | |
| 22 | #define ADT7310_T_ALARM_HIGH 6 | |
| 23 | #define ADT7310_T_ALARM_LOW 7 | |
| 24 | ||
| 25 | static const u8 adt7310_reg_table[] = { | |
| 26 | [ADT7X10_TEMPERATURE] = ADT7310_TEMPERATURE, | |
| 27 | [ADT7X10_STATUS] = ADT7310_STATUS, | |
| 28 | [ADT7X10_CONFIG] = ADT7310_CONFIG, | |
| 29 | [ADT7X10_T_ALARM_HIGH] = ADT7310_T_ALARM_HIGH, | |
| 30 | [ADT7X10_T_ALARM_LOW] = ADT7310_T_ALARM_LOW, | |
| 31 | [ADT7X10_T_CRIT] = ADT7310_T_CRIT, | |
| 32 | [ADT7X10_T_HYST] = ADT7310_T_HYST, | |
| 33 | [ADT7X10_ID] = ADT7310_ID, | |
| 34 | }; | |
| 35 | ||
| 36 | #define ADT7310_CMD_REG_OFFSET 3 | |
| 37 | #define ADT7310_CMD_READ 0x40 | |
| 38 | ||
| 39 | #define AD7310_COMMAND(reg) (adt7310_reg_table[(reg)] << ADT7310_CMD_REG_OFFSET) | |
| 40 | ||
| 41 | static int adt7310_spi_read_word(struct device *dev, u8 reg) | |
| 42 | { | |
| 43 | struct spi_device *spi = to_spi_device(dev); | |
| 51c2a487 | 44 | |
| 600ba98b | 45 | return spi_w8r16be(spi, AD7310_COMMAND(reg) | ADT7310_CMD_READ); |
| 51c2a487 LPC |
46 | } |
| 47 | ||
| 48 | static int adt7310_spi_write_word(struct device *dev, u8 reg, u16 data) | |
| 49 | { | |
| 50 | struct spi_device *spi = to_spi_device(dev); | |
| 51 | u8 buf[3]; | |
| 52 | ||
| 53 | buf[0] = AD7310_COMMAND(reg); | |
| 54 | put_unaligned_be16(data, &buf[1]); | |
| 55 | ||
| 56 | return spi_write(spi, buf, sizeof(buf)); | |
| 57 | } | |
| 58 | ||
| 59 | static int adt7310_spi_read_byte(struct device *dev, u8 reg) | |
| 60 | { | |
| 61 | struct spi_device *spi = to_spi_device(dev); | |
| 62 | ||
| 63 | return spi_w8r8(spi, AD7310_COMMAND(reg) | ADT7310_CMD_READ); | |
| 64 | } | |
| 65 | ||
| 66 | static int adt7310_spi_write_byte(struct device *dev, u8 reg, | |
| 67 | u8 data) | |
| 68 | { | |
| 69 | struct spi_device *spi = to_spi_device(dev); | |
| 70 | u8 buf[2]; | |
| 71 | ||
| 72 | buf[0] = AD7310_COMMAND(reg); | |
| 73 | buf[1] = data; | |
| 74 | ||
| 75 | return spi_write(spi, buf, sizeof(buf)); | |
| 76 | } | |
| 77 | ||
| 78 | static const struct adt7x10_ops adt7310_spi_ops = { | |
| 79 | .read_word = adt7310_spi_read_word, | |
| 80 | .write_word = adt7310_spi_write_word, | |
| 81 | .read_byte = adt7310_spi_read_byte, | |
| 82 | .write_byte = adt7310_spi_write_byte, | |
| 83 | }; | |
| 84 | ||
| 85 | static int adt7310_spi_probe(struct spi_device *spi) | |
| 86 | { | |
| 4b5e536b | 87 | return adt7x10_probe(&spi->dev, spi_get_device_id(spi)->name, spi->irq, |
| 51c2a487 LPC |
88 | &adt7310_spi_ops); |
| 89 | } | |
| 90 | ||
| 91 | static int adt7310_spi_remove(struct spi_device *spi) | |
| 92 | { | |
| 4b5e536b | 93 | return adt7x10_remove(&spi->dev, spi->irq); |
| 51c2a487 LPC |
94 | } |
| 95 | ||
| 96 | static const struct spi_device_id adt7310_id[] = { | |
| 97 | { "adt7310", 0 }, | |
| 98 | { "adt7320", 0 }, | |
| 99 | {} | |
| 100 | }; | |
| 101 | MODULE_DEVICE_TABLE(spi, adt7310_id); | |
| 102 | ||
| 103 | static struct spi_driver adt7310_driver = { | |
| 104 | .driver = { | |
| 105 | .name = "adt7310", | |
| 51c2a487 LPC |
106 | .pm = ADT7X10_DEV_PM_OPS, |
| 107 | }, | |
| 108 | .probe = adt7310_spi_probe, | |
| 109 | .remove = adt7310_spi_remove, | |
| 110 | .id_table = adt7310_id, | |
| 111 | }; | |
| 112 | module_spi_driver(adt7310_driver); | |
| 113 | ||
| 114 | MODULE_AUTHOR("Lars-Peter Clausen <[email protected]>"); | |
| 115 | MODULE_DESCRIPTION("ADT7310/ADT7320 driver"); | |
| 116 | MODULE_LICENSE("GPL"); |