staging: iio: new ADT7316/7/8 and ADT7516/7/9 driver (35f6b6b8) · Commits · e / devices / android_kernel_oneplus_sm7250

drivers/staging/iio/Kconfig

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		@@ -42,6 +42,7 @@ config IIO_TRIGGER

		source "drivers/staging/iio/accel/Kconfig"
		source "drivers/staging/iio/adc/Kconfig"
		source "drivers/staging/iio/addac/Kconfig"
		source "drivers/staging/iio/gyro/Kconfig"
		source "drivers/staging/iio/imu/Kconfig"
		source "drivers/staging/iio/light/Kconfig"

drivers/staging/iio/Makefile

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		@@ -11,6 +11,7 @@ obj-$(CONFIG_IIO_SW_RING) += ring_sw.o

		obj-y += accel/
		obj-y += adc/
		obj-y += addac/
		obj-y += gyro/
		obj-y += imu/
		obj-y += light/

drivers/staging/iio/addac/Kconfig

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		#
		# ADDAC drivers
		#
		comment "Analog digital bi-direction convertors"

		config ADT7316
		tristate "Analog Devices ADT7316/7/8 ADT7516/7/9 temperature sensor, ADC and DAC driver"
		help
		Say yes here to build support for Analog Devices ADT7316, ADT7317, ADT7318
		and ADT7516, ADT7517, ADT7519 temperature sensors, ADC and DAC.

		config ADT7316_SPI
		tristate "support SPI bus connection"
		depends on SPI && ADT7316
		default y
		help
		Say yes here to build SPI bus support for Analog Devices ADT7316/7/8
		and ADT7516/7/9.

		config ADT7316_I2C
		tristate "support I2C bus connection"
		depends on I2C && ADT7316
		help
		Say yes here to build I2C bus support for Analog Devices ADT7316/7/8
		and ADT7516/7/9.

drivers/staging/iio/addac/Makefile

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		#
		# Makefile for industrial I/O ADDAC drivers
		#

		obj-$(CONFIG_ADT7316) += adt7316.o
		obj-$(CONFIG_ADT7316_SPI) += adt7316-spi.o
		obj-$(CONFIG_ADT7316_I2C) += adt7316-i2c.o

drivers/staging/iio/addac/adt7316-i2c.c

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		/*
		* I2C bus driver for ADT7316/7/8 ADT7516/7/9 digital temperature
		* sensor, ADC and DAC
		*
		* Copyright 2010 Analog Devices Inc.
		*
		* Licensed under the GPL-2 or later.
		*/

		#include <linux/device.h>
		#include <linux/kernel.h>
		#include <linux/i2c.h>
		#include <linux/interrupt.h>

		#include "adt7316.h"

		/*
		* adt7316 register access by I2C
		*/
		static int adt7316_i2c_read(void client, u8 reg, u8 data)
		{
		struct i2c_client *cl = client;
		int ret = 0;

		ret = i2c_smbus_write_byte(cl, reg);
		if (ret < 0) {
		dev_err(&cl->dev, "I2C fail to select reg\n");
		return ret;
		}

		ret = i2c_smbus_read_byte(client);
		if (ret < 0) {
		dev_err(&cl->dev, "I2C read error\n");
		return ret;
		}

		return 0;
		}

		static int adt7316_i2c_write(void *client, u8 reg, u8 data)
		{
		struct i2c_client *cl = client;
		int ret = 0;

		ret = i2c_smbus_write_byte_data(cl, reg, data);
		if (ret < 0)
		dev_err(&cl->dev, "I2C write error\n");

		return ret;
		}

		static int adt7316_i2c_multi_read(void client, u8 reg, u8 count, u8 data)
		{
		struct i2c_client *cl = client;
		int i, ret = 0;

		if (count > ADT7316_REG_MAX_ADDR)
		count = ADT7316_REG_MAX_ADDR;

		for (i = 0; i < count; i++) {
		ret = adt7316_i2c_read(cl, reg, &data[i]);
		if (ret < 0) {
		dev_err(&cl->dev, "I2C multi read error\n");
		return ret;
		}
		}

		return 0;
		}

		static int adt7316_i2c_multi_write(void client, u8 reg, u8 count, u8 data)
		{
		struct i2c_client *cl = client;
		int i, ret = 0;

		if (count > ADT7316_REG_MAX_ADDR)
		count = ADT7316_REG_MAX_ADDR;

		for (i = 0; i < count; i++) {
		ret = adt7316_i2c_write(cl, reg, data[i]);
		if (ret < 0) {
		dev_err(&cl->dev, "I2C multi write error\n");
		return ret;
		}
		}

		return 0;
		}

		/*
		* device probe and remove
		*/

		static int __devinit adt7316_i2c_probe(struct i2c_client *client,
		const struct i2c_device_id *id)
		{
		struct adt7316_bus bus = {
		.client = client,
		.irq = client->irq,
		.irq_flags = IRQF_TRIGGER_LOW,
		.read = adt7316_i2c_read,
		.write = adt7316_i2c_write,
		.multi_read = adt7316_i2c_multi_read,
		.multi_write = adt7316_i2c_multi_write,
		};

		return adt7316_probe(&client->dev, &bus, id->name);
		}

		static int __devexit adt7316_i2c_remove(struct i2c_client *client)
		{
		return adt7316_remove(&client->dev);;
		}

		static const struct i2c_device_id adt7316_i2c_id[] = {
		{ "adt7316", 0 },
		{ "adt7317", 0 },
		{ "adt7318", 0 },
		{ "adt7516", 0 },
		{ "adt7517", 0 },
		{ "adt7519", 0 },
		{ }
		};

		MODULE_DEVICE_TABLE(i2c, adt7316_i2c_id);

		#ifdef CONFIG_PM
		static int adt7316_i2c_suspend(struct i2c_client *client, pm_message_t message)
		{
		return adt7316_disable(&client->dev);
		}

		static int adt7316_i2c_resume(struct i2c_client *client)
		{
		return adt7316_enable(&client->dev);
		}
		#else
		# define adt7316_i2c_suspend NULL
		# define adt7316_i2c_resume NULL
		#endif

		static struct i2c_driver adt7316_driver = {
		.driver = {
		.name = "adt7316",
		.owner = THIS_MODULE,
		},
		.probe = adt7316_i2c_probe,
		.remove = __devexit_p(adt7316_i2c_remove),
		.suspend = adt7316_i2c_suspend,
		.resume = adt7316_i2c_resume,
		.id_table = adt7316_i2c_id,
		};

		static __init int adt7316_i2c_init(void)
		{
		return i2c_add_driver(&adt7316_driver);
		}

		static __exit void adt7316_i2c_exit(void)
		{
		i2c_del_driver(&adt7316_driver);
		}

		MODULE_AUTHOR("Sonic Zhang <sonic.zhang@analog.com>");
		MODULE_DESCRIPTION("I2C bus driver for Analog Devices ADT7316/7/9 and"
		"ADT7516/7/8 digital temperature sensor, ADC and DAC");
		MODULE_LICENSE("GPL v2");

		module_init(adt7316_i2c_init);
		module_exit(adt7316_i2c_exit);