[GitHub/mt8127/android_kernel_alcatel_ttab.git] / drivers / hwmon / adt7310.c

/*
 * ADT7310/ADT7310 digital temperature sensor driver
 *
 * Copyright 2012-2013 Analog Devices Inc.
 *   Author: Lars-Peter Clausen <lars@metafoo.de>
 *
 * Licensed under the GPL-2 or later.
 */

#include <linux/module.h>
#include <linux/init.h>
#include <linux/spi/spi.h>
#include <asm/unaligned.h>

#include "adt7x10.h"

#define ADT7310_STATUS			0
#define ADT7310_CONFIG			1
#define ADT7310_TEMPERATURE		2
#define ADT7310_ID			3
#define ADT7310_T_CRIT			4
#define ADT7310_T_HYST			5
#define ADT7310_T_ALARM_HIGH		6
#define ADT7310_T_ALARM_LOW		7

static const u8 adt7310_reg_table[] = {
	[ADT7X10_TEMPERATURE]   = ADT7310_TEMPERATURE,
	[ADT7X10_STATUS]	= ADT7310_STATUS,
	[ADT7X10_CONFIG]	= ADT7310_CONFIG,
	[ADT7X10_T_ALARM_HIGH]	= ADT7310_T_ALARM_HIGH,
	[ADT7X10_T_ALARM_LOW]	= ADT7310_T_ALARM_LOW,
	[ADT7X10_T_CRIT]	= ADT7310_T_CRIT,
	[ADT7X10_T_HYST]	= ADT7310_T_HYST,
	[ADT7X10_ID]		= ADT7310_ID,
};

#define ADT7310_CMD_REG_OFFSET	3
#define ADT7310_CMD_READ	0x40

#define AD7310_COMMAND(reg) (adt7310_reg_table[(reg)] << ADT7310_CMD_REG_OFFSET)

static int adt7310_spi_read_word(struct device *dev, u8 reg)
{
	struct spi_device *spi = to_spi_device(dev);
	int ret;

	ret = spi_w8r16(spi, AD7310_COMMAND(reg) | ADT7310_CMD_READ);
	if (ret < 0)
		return ret;

	return be16_to_cpu((__force __be16)ret);
}

static int adt7310_spi_write_word(struct device *dev, u8 reg, u16 data)
{
	struct spi_device *spi = to_spi_device(dev);
	u8 buf[3];

	buf[0] = AD7310_COMMAND(reg);
	put_unaligned_be16(data, &buf[1]);

	return spi_write(spi, buf, sizeof(buf));
}

static int adt7310_spi_read_byte(struct device *dev, u8 reg)
{
	struct spi_device *spi = to_spi_device(dev);

	return spi_w8r8(spi, AD7310_COMMAND(reg) | ADT7310_CMD_READ);
}

static int adt7310_spi_write_byte(struct device *dev, u8 reg,
	u8 data)
{
	struct spi_device *spi = to_spi_device(dev);
	u8 buf[2];

	buf[0] = AD7310_COMMAND(reg);
	buf[1] = data;

	return spi_write(spi, buf, sizeof(buf));
}

static const struct adt7x10_ops adt7310_spi_ops = {
	.read_word = adt7310_spi_read_word,
	.write_word = adt7310_spi_write_word,
	.read_byte = adt7310_spi_read_byte,
	.write_byte = adt7310_spi_write_byte,
};

static int adt7310_spi_probe(struct spi_device *spi)
{
	return adt7x10_probe(&spi->dev, spi_get_device_id(spi)->name, spi->irq,
			&adt7310_spi_ops);
}

static int adt7310_spi_remove(struct spi_device *spi)
{
	return adt7x10_remove(&spi->dev, spi->irq);
}

static const struct spi_device_id adt7310_id[] = {
	{ "adt7310", 0 },
	{ "adt7320", 0 },
	{}
};
MODULE_DEVICE_TABLE(spi, adt7310_id);

static struct spi_driver adt7310_driver = {
	.driver = {
		.name	= "adt7310",
		.owner	= THIS_MODULE,
		.pm	= ADT7X10_DEV_PM_OPS,
	},
	.probe		= adt7310_spi_probe,
	.remove		= adt7310_spi_remove,
	.id_table	= adt7310_id,
};
module_spi_driver(adt7310_driver);

MODULE_AUTHOR("Lars-Peter Clausen <lars@metafoo.de>");
MODULE_DESCRIPTION("ADT7310/ADT7320 driver");
MODULE_LICENSE("GPL");
Commit	Line	Data
51c2a487 LPC	1	/*
	2	* ADT7310/ADT7310 digital temperature sensor driver
	3	*
	4	* Copyright 2012-2013 Analog Devices Inc.
	5	* Author: Lars-Peter Clausen <lars@metafoo.de>
	6	*
	7	* Licensed under the GPL-2 or later.
	8	*/
	9
	10	#include <linux/module.h>
	11	#include <linux/init.h>
	12	#include <linux/spi/spi.h>
	13	#include <asm/unaligned.h>
	14
	15	#include "adt7x10.h"
	16
	17	#define ADT7310_STATUS 0
	18	#define ADT7310_CONFIG 1
	19	#define ADT7310_TEMPERATURE 2
	20	#define ADT7310_ID 3
	21	#define ADT7310_T_CRIT 4
	22	#define ADT7310_T_HYST 5
	23	#define ADT7310_T_ALARM_HIGH 6
	24	#define ADT7310_T_ALARM_LOW 7
	25
	26	static const u8 adt7310_reg_table[] = {
	27	[ADT7X10_TEMPERATURE] = ADT7310_TEMPERATURE,
	28	[ADT7X10_STATUS] = ADT7310_STATUS,
	29	[ADT7X10_CONFIG] = ADT7310_CONFIG,
	30	[ADT7X10_T_ALARM_HIGH] = ADT7310_T_ALARM_HIGH,
	31	[ADT7X10_T_ALARM_LOW] = ADT7310_T_ALARM_LOW,
	32	[ADT7X10_T_CRIT] = ADT7310_T_CRIT,
	33	[ADT7X10_T_HYST] = ADT7310_T_HYST,
	34	[ADT7X10_ID] = ADT7310_ID,
	35	};
	36
	37	#define ADT7310_CMD_REG_OFFSET 3
	38	#define ADT7310_CMD_READ 0x40
	39
	40	#define AD7310_COMMAND(reg) (adt7310_reg_table[(reg)] << ADT7310_CMD_REG_OFFSET)
	41
	42	static int adt7310_spi_read_word(struct device *dev, u8 reg)
	43	{
	44	struct spi_device *spi = to_spi_device(dev);
	45	int ret;
	46
	47	ret = spi_w8r16(spi, AD7310_COMMAND(reg) \| ADT7310_CMD_READ);
	48	if (ret < 0)
	49	return ret;
	50
71bb2d21	51	return be16_to_cpu((__force __be16)ret);
51c2a487 LPC	52	}
	53
	54	static int adt7310_spi_write_word(struct device *dev, u8 reg, u16 data)
	55	{
	56	struct spi_device *spi = to_spi_device(dev);
	57	u8 buf[3];
	58
	59	buf[0] = AD7310_COMMAND(reg);
	60	put_unaligned_be16(data, &buf[1]);
	61
	62	return spi_write(spi, buf, sizeof(buf));
	63	}
	64
	65	static int adt7310_spi_read_byte(struct device *dev, u8 reg)
	66	{
	67	struct spi_device *spi = to_spi_device(dev);
	68
	69	return spi_w8r8(spi, AD7310_COMMAND(reg) \| ADT7310_CMD_READ);
	70	}
	71
	72	static int adt7310_spi_write_byte(struct device *dev, u8 reg,
	73	u8 data)
	74	{
	75	struct spi_device *spi = to_spi_device(dev);
	76	u8 buf[2];
	77
	78	buf[0] = AD7310_COMMAND(reg);
	79	buf[1] = data;
	80
	81	return spi_write(spi, buf, sizeof(buf));
	82	}
	83
	84	static const struct adt7x10_ops adt7310_spi_ops = {
	85	.read_word = adt7310_spi_read_word,
	86	.write_word = adt7310_spi_write_word,
	87	.read_byte = adt7310_spi_read_byte,
	88	.write_byte = adt7310_spi_write_byte,
	89	};
	90
	91	static int adt7310_spi_probe(struct spi_device *spi)
	92	{
4b5e536b	93	return adt7x10_probe(&spi->dev, spi_get_device_id(spi)->name, spi->irq,
51c2a487 LPC	94	&adt7310_spi_ops);
	95	}
	96
	97	static int adt7310_spi_remove(struct spi_device *spi)
	98	{
4b5e536b	99	return adt7x10_remove(&spi->dev, spi->irq);
51c2a487 LPC	100	}
	101
	102	static const struct spi_device_id adt7310_id[] = {
	103	{ "adt7310", 0 },
	104	{ "adt7320", 0 },
	105	{}
	106	};
	107	MODULE_DEVICE_TABLE(spi, adt7310_id);
	108
	109	static struct spi_driver adt7310_driver = {
	110	.driver = {
	111	.name = "adt7310",
	112	.owner = THIS_MODULE,
	113	.pm = ADT7X10_DEV_PM_OPS,
	114	},
	115	.probe = adt7310_spi_probe,
	116	.remove = adt7310_spi_remove,
	117	.id_table = adt7310_id,
	118	};
	119	module_spi_driver(adt7310_driver);
	120
	121	MODULE_AUTHOR("Lars-Peter Clausen <lars@metafoo.de>");
	122	MODULE_DESCRIPTION("ADT7310/ADT7320 driver");
	123	MODULE_LICENSE("GPL");