Input: add driver for ADXL345/346 Digital Accelerometers (e27c7292) · Commits · e / devices / android_kernel_fairphone_FP3

drivers/input/misc/Kconfig

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	@@ -390,4 +390,41 @@ config INPUT_PCAP
	To compile this driver as a module, choose M here: the		To compile this driver as a module, choose M here: the
	module will be called pcap_keys.		module will be called pcap_keys.

			config INPUT_ADXL34X
			tristate "Analog Devices ADXL34x Three-Axis Digital Accelerometer"
			default n
			help
			Say Y here if you have a Accelerometer interface using the
			ADXL345/6 controller, and your board-specific initialization
			code includes that in its table of devices.

			This driver can use either I2C or SPI communication to the
			ADXL345/6 controller. Select the appropriate method for
			your system.

			If unsure, say N (but it's safe to say "Y").

			To compile this driver as a module, choose M here: the
			module will be called adxl34x.

			config INPUT_ADXL34X_I2C
			tristate "support I2C bus connection"
			depends on INPUT_ADXL34X && I2C
			default y
			help
			Say Y here if you have ADXL345/6 hooked to an I2C bus.

			To compile this driver as a module, choose M here: the
			module will be called adxl34x-i2c.

			config INPUT_ADXL34X_SPI
			tristate "support SPI bus connection"
			depends on INPUT_ADXL34X && SPI
			default y
			help
			Say Y here if you have ADXL345/6 hooked to a SPI bus.

			To compile this driver as a module, choose M here: the
			module will be called adxl34x-spi.

	endif		endif

drivers/input/misc/Makefile

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	@@ -8,6 +8,9 @@ obj-$(CONFIG_INPUT_88PM860X_ONKEY) += 88pm860x_onkey.o
	obj-$(CONFIG_INPUT_AD714X) += ad714x.o		obj-$(CONFIG_INPUT_AD714X) += ad714x.o
	obj-$(CONFIG_INPUT_AD714X_I2C) += ad714x-i2c.o		obj-$(CONFIG_INPUT_AD714X_I2C) += ad714x-i2c.o
	obj-$(CONFIG_INPUT_AD714X_SPI) += ad714x-spi.o		obj-$(CONFIG_INPUT_AD714X_SPI) += ad714x-spi.o
			obj-$(CONFIG_INPUT_ADXL34X) += adxl34x.o
			obj-$(CONFIG_INPUT_ADXL34X_I2C) += adxl34x-i2c.o
			obj-$(CONFIG_INPUT_ADXL34X_SPI) += adxl34x-spi.o
	obj-$(CONFIG_INPUT_APANEL) += apanel.o		obj-$(CONFIG_INPUT_APANEL) += apanel.o
	obj-$(CONFIG_INPUT_ATI_REMOTE) += ati_remote.o		obj-$(CONFIG_INPUT_ATI_REMOTE) += ati_remote.o
	obj-$(CONFIG_INPUT_ATI_REMOTE2) += ati_remote2.o		obj-$(CONFIG_INPUT_ATI_REMOTE2) += ati_remote2.o

drivers/input/misc/adxl34x-i2c.c

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			/*
			* ADLX345/346 Three-Axis Digital Accelerometers (I2C Interface)
			*
			* Enter bugs at http://blackfin.uclinux.org/
			*
			* Copyright (C) 2009 Michael Hennerich, Analog Devices Inc.
			* Licensed under the GPL-2 or later.
			*/

			#include <linux/input.h> /* BUS_I2C */
			#include <linux/i2c.h>
			#include <linux/module.h>
			#include <linux/types.h>
			#include "adxl34x.h"

			static int adxl34x_smbus_read(struct device *dev, unsigned char reg)
			{
			struct i2c_client *client = to_i2c_client(dev);

			return i2c_smbus_read_byte_data(client, reg);
			}

			static int adxl34x_smbus_write(struct device *dev,
			unsigned char reg, unsigned char val)
			{
			struct i2c_client *client = to_i2c_client(dev);

			return i2c_smbus_write_byte_data(client, reg, val);
			}

			static int adxl34x_smbus_read_block(struct device *dev,
			unsigned char reg, int count,
			void *buf)
			{
			struct i2c_client *client = to_i2c_client(dev);

			return i2c_smbus_read_i2c_block_data(client, reg, count, buf);
			}

			static int adxl34x_i2c_read_block(struct device *dev,
			unsigned char reg, int count,
			void *buf)
			{
			struct i2c_client *client = to_i2c_client(dev);
			int ret;

			ret = i2c_master_send(client, &reg, 1);
			if (ret < 0)
			return ret;

			ret = i2c_master_recv(client, buf, count);
			if (ret < 0)
			return ret;

			if (ret != count)
			return -EIO;

			return 0;
			}

			static const struct adxl34x_bus_ops adx134x_smbus_bops = {
			.bustype = BUS_I2C,
			.write = adxl34x_smbus_write,
			.read = adxl34x_smbus_read,
			.read_block = adxl34x_smbus_read_block,
			};

			static const struct adxl34x_bus_ops adx134x_i2c_bops = {
			.bustype = BUS_I2C,
			.write = adxl34x_smbus_write,
			.read = adxl34x_smbus_read,
			.read_block = adxl34x_i2c_read_block,
			};

			static int __devinit adxl34x_i2c_probe(struct i2c_client *client,
			const struct i2c_device_id *id)
			{
			struct adxl34x *ac;
			int error;

			error = i2c_check_functionality(client->adapter,
			I2C_FUNC_SMBUS_BYTE_DATA);
			if (!error) {
			dev_err(&client->dev, "SMBUS Byte Data not Supported\n");
			return -EIO;
			}

			ac = adxl34x_probe(&client->dev, client->irq, false,
			i2c_check_functionality(client->adapter,
			I2C_FUNC_SMBUS_READ_I2C_BLOCK) ?
			&adx134x_smbus_bops : &adx134x_i2c_bops);
			if (IS_ERR(ac))
			return PTR_ERR(ac);

			i2c_set_clientdata(client, ac);

			return 0;
			}

			static int __devexit adxl34x_i2c_remove(struct i2c_client *client)
			{
			struct adxl34x *ac = i2c_get_clientdata(client);

			return adxl34x_remove(ac);
			}

			#ifdef CONFIG_PM
			static int adxl34x_suspend(struct i2c_client *client, pm_message_t message)
			{
			struct adxl34x *ac = i2c_get_clientdata(client);

			adxl34x_disable(ac);

			return 0;
			}

			static int adxl34x_resume(struct i2c_client *client)
			{
			struct adxl34x *ac = i2c_get_clientdata(client);

			adxl34x_enable(ac);

			return 0;
			}
			#else
			# define adxl34x_suspend NULL
			# define adxl34x_resume NULL
			#endif

			static const struct i2c_device_id adxl34x_id[] = {
			{ "adxl34x", 0 },
			{ }
			};

			MODULE_DEVICE_TABLE(i2c, adxl34x_id);

			static struct i2c_driver adxl34x_driver = {
			.driver = {
			.name = "adxl34x",
			.owner = THIS_MODULE,
			},
			.probe = adxl34x_i2c_probe,
			.remove = __devexit_p(adxl34x_i2c_remove),
			.suspend = adxl34x_suspend,
			.resume = adxl34x_resume,
			.id_table = adxl34x_id,
			};

			static int __init adxl34x_i2c_init(void)
			{
			return i2c_add_driver(&adxl34x_driver);
			}
			module_init(adxl34x_i2c_init);

			static void __exit adxl34x_i2c_exit(void)
			{
			i2c_del_driver(&adxl34x_driver);
			}
			module_exit(adxl34x_i2c_exit);

			MODULE_AUTHOR("Michael Hennerich <hennerich@blackfin.uclinux.org>");
			MODULE_DESCRIPTION("ADXL345/346 Three-Axis Digital Accelerometer I2C Bus Driver");
			MODULE_LICENSE("GPL");

drivers/input/misc/adxl34x-spi.c

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			/*
			* ADLX345/346 Three-Axis Digital Accelerometers (SPI Interface)
			*
			* Enter bugs at http://blackfin.uclinux.org/
			*
			* Copyright (C) 2009 Michael Hennerich, Analog Devices Inc.
			* Licensed under the GPL-2 or later.
			*/

			#include <linux/input.h> /* BUS_SPI */
			#include <linux/module.h>
			#include <linux/spi/spi.h>
			#include <linux/types.h>
			#include "adxl34x.h"

			#define MAX_SPI_FREQ_HZ 5000000
			#define MAX_FREQ_NO_FIFODELAY 1500000
			#define ADXL34X_CMD_MULTB (1 << 6)
			#define ADXL34X_CMD_READ (1 << 7)
			#define ADXL34X_WRITECMD(reg) (reg & 0x3F)
			#define ADXL34X_READCMD(reg) (ADXL34X_CMD_READ \| (reg & 0x3F))
			#define ADXL34X_READMB_CMD(reg) (ADXL34X_CMD_READ \| ADXL34X_CMD_MULTB \
			\| (reg & 0x3F))

			static int adxl34x_spi_read(struct device *dev, unsigned char reg)
			{
			struct spi_device *spi = to_spi_device(dev);
			unsigned char cmd;

			cmd = ADXL34X_READCMD(reg);

			return spi_w8r8(spi, cmd);
			}

			static int adxl34x_spi_write(struct device *dev,
			unsigned char reg, unsigned char val)
			{
			struct spi_device *spi = to_spi_device(dev);
			unsigned char buf[2];

			buf[0] = ADXL34X_WRITECMD(reg);
			buf[1] = val;

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

			static int adxl34x_spi_read_block(struct device *dev,
			unsigned char reg, int count,
			void *buf)
			{
			struct spi_device *spi = to_spi_device(dev);
			ssize_t status;

			reg = ADXL34X_READMB_CMD(reg);
			status = spi_write_then_read(spi, &reg, 1, buf, count);

			return (status < 0) ? status : 0;
			}

			static const struct adxl34x_bus_ops adx134x_spi_bops = {
			.bustype = BUS_SPI,
			.write = adxl34x_spi_write,
			.read = adxl34x_spi_read,
			.read_block = adxl34x_spi_read_block,
			};

			static int __devinit adxl34x_spi_probe(struct spi_device *spi)
			{
			struct adxl34x *ac;

			/* don't exceed max specified SPI CLK frequency */
			if (spi->max_speed_hz > MAX_SPI_FREQ_HZ) {
			dev_err(&spi->dev, "SPI CLK %d Hz too fast\n", spi->max_speed_hz);
			return -EINVAL;
			}

			ac = adxl34x_probe(&spi->dev, spi->irq,
			spi->max_speed_hz > MAX_FREQ_NO_FIFODELAY,
			&adx134x_spi_bops);

			if (IS_ERR(ac))
			return PTR_ERR(ac);

			spi_set_drvdata(spi, ac);

			return 0;
			}

			static int __devexit adxl34x_spi_remove(struct spi_device *spi)
			{
			struct adxl34x *ac = dev_get_drvdata(&spi->dev);

			return adxl34x_remove(ac);
			}

			#ifdef CONFIG_PM
			static int adxl34x_suspend(struct spi_device *spi, pm_message_t message)
			{
			struct adxl34x *ac = dev_get_drvdata(&spi->dev);

			adxl34x_disable(ac);

			return 0;
			}

			static int adxl34x_resume(struct spi_device *spi)
			{
			struct adxl34x *ac = dev_get_drvdata(&spi->dev);

			adxl34x_enable(ac);

			return 0;
			}
			#else
			# define adxl34x_suspend NULL
			# define adxl34x_resume NULL
			#endif

			static struct spi_driver adxl34x_driver = {
			.driver = {
			.name = "adxl34x",
			.bus = &spi_bus_type,
			.owner = THIS_MODULE,
			},
			.probe = adxl34x_spi_probe,
			.remove = __devexit_p(adxl34x_spi_remove),
			.suspend = adxl34x_suspend,
			.resume = adxl34x_resume,
			};

			static int __init adxl34x_spi_init(void)
			{
			return spi_register_driver(&adxl34x_driver);
			}
			module_init(adxl34x_spi_init);

			static void __exit adxl34x_spi_exit(void)
			{
			spi_unregister_driver(&adxl34x_driver);
			}
			module_exit(adxl34x_spi_exit);

			MODULE_AUTHOR("Michael Hennerich <hennerich@blackfin.uclinux.org>");
			MODULE_DESCRIPTION("ADXL345/346 Three-Axis Digital Accelerometer SPI Bus Driver");
			MODULE_LICENSE("GPL");