Michael Hennerich | e27c729 | 2010-06-25 08:44:10 -0700 | [diff] [blame] | 1 | /* |
| 2 | * ADLX345/346 Three-Axis Digital Accelerometers (I2C Interface) |
| 3 | * |
| 4 | * Enter bugs at http://blackfin.uclinux.org/ |
| 5 | * |
| 6 | * Copyright (C) 2009 Michael Hennerich, Analog Devices Inc. |
| 7 | * Licensed under the GPL-2 or later. |
| 8 | */ |
| 9 | |
| 10 | #include <linux/input.h> /* BUS_I2C */ |
| 11 | #include <linux/i2c.h> |
| 12 | #include <linux/module.h> |
| 13 | #include <linux/types.h> |
Mark Brown | fbb8993 | 2011-02-11 08:51:52 -0800 | [diff] [blame] | 14 | #include <linux/pm.h> |
Michael Hennerich | e27c729 | 2010-06-25 08:44:10 -0700 | [diff] [blame] | 15 | #include "adxl34x.h" |
| 16 | |
| 17 | static int adxl34x_smbus_read(struct device *dev, unsigned char reg) |
| 18 | { |
| 19 | struct i2c_client *client = to_i2c_client(dev); |
| 20 | |
| 21 | return i2c_smbus_read_byte_data(client, reg); |
| 22 | } |
| 23 | |
| 24 | static int adxl34x_smbus_write(struct device *dev, |
| 25 | unsigned char reg, unsigned char val) |
| 26 | { |
| 27 | struct i2c_client *client = to_i2c_client(dev); |
| 28 | |
| 29 | return i2c_smbus_write_byte_data(client, reg, val); |
| 30 | } |
| 31 | |
| 32 | static int adxl34x_smbus_read_block(struct device *dev, |
| 33 | unsigned char reg, int count, |
| 34 | void *buf) |
| 35 | { |
| 36 | struct i2c_client *client = to_i2c_client(dev); |
| 37 | |
| 38 | return i2c_smbus_read_i2c_block_data(client, reg, count, buf); |
| 39 | } |
| 40 | |
| 41 | static int adxl34x_i2c_read_block(struct device *dev, |
| 42 | unsigned char reg, int count, |
| 43 | void *buf) |
| 44 | { |
| 45 | struct i2c_client *client = to_i2c_client(dev); |
| 46 | int ret; |
| 47 | |
| 48 | ret = i2c_master_send(client, ®, 1); |
| 49 | if (ret < 0) |
| 50 | return ret; |
| 51 | |
| 52 | ret = i2c_master_recv(client, buf, count); |
| 53 | if (ret < 0) |
| 54 | return ret; |
| 55 | |
| 56 | if (ret != count) |
| 57 | return -EIO; |
| 58 | |
| 59 | return 0; |
| 60 | } |
| 61 | |
Dmitry Torokhov | af6e1d9 | 2010-07-01 09:07:33 -0700 | [diff] [blame] | 62 | static const struct adxl34x_bus_ops adxl34x_smbus_bops = { |
Michael Hennerich | e27c729 | 2010-06-25 08:44:10 -0700 | [diff] [blame] | 63 | .bustype = BUS_I2C, |
| 64 | .write = adxl34x_smbus_write, |
| 65 | .read = adxl34x_smbus_read, |
| 66 | .read_block = adxl34x_smbus_read_block, |
| 67 | }; |
| 68 | |
Dmitry Torokhov | af6e1d9 | 2010-07-01 09:07:33 -0700 | [diff] [blame] | 69 | static const struct adxl34x_bus_ops adxl34x_i2c_bops = { |
Michael Hennerich | e27c729 | 2010-06-25 08:44:10 -0700 | [diff] [blame] | 70 | .bustype = BUS_I2C, |
| 71 | .write = adxl34x_smbus_write, |
| 72 | .read = adxl34x_smbus_read, |
| 73 | .read_block = adxl34x_i2c_read_block, |
| 74 | }; |
| 75 | |
| 76 | static int __devinit adxl34x_i2c_probe(struct i2c_client *client, |
| 77 | const struct i2c_device_id *id) |
| 78 | { |
| 79 | struct adxl34x *ac; |
| 80 | int error; |
| 81 | |
| 82 | error = i2c_check_functionality(client->adapter, |
| 83 | I2C_FUNC_SMBUS_BYTE_DATA); |
| 84 | if (!error) { |
| 85 | dev_err(&client->dev, "SMBUS Byte Data not Supported\n"); |
| 86 | return -EIO; |
| 87 | } |
| 88 | |
| 89 | ac = adxl34x_probe(&client->dev, client->irq, false, |
| 90 | i2c_check_functionality(client->adapter, |
| 91 | I2C_FUNC_SMBUS_READ_I2C_BLOCK) ? |
Dmitry Torokhov | af6e1d9 | 2010-07-01 09:07:33 -0700 | [diff] [blame] | 92 | &adxl34x_smbus_bops : &adxl34x_i2c_bops); |
Michael Hennerich | e27c729 | 2010-06-25 08:44:10 -0700 | [diff] [blame] | 93 | if (IS_ERR(ac)) |
| 94 | return PTR_ERR(ac); |
| 95 | |
| 96 | i2c_set_clientdata(client, ac); |
| 97 | |
| 98 | return 0; |
| 99 | } |
| 100 | |
| 101 | static int __devexit adxl34x_i2c_remove(struct i2c_client *client) |
| 102 | { |
| 103 | struct adxl34x *ac = i2c_get_clientdata(client); |
| 104 | |
| 105 | return adxl34x_remove(ac); |
| 106 | } |
| 107 | |
| 108 | #ifdef CONFIG_PM |
Mark Brown | fbb8993 | 2011-02-11 08:51:52 -0800 | [diff] [blame] | 109 | static int adxl34x_i2c_suspend(struct device *dev) |
Michael Hennerich | e27c729 | 2010-06-25 08:44:10 -0700 | [diff] [blame] | 110 | { |
Mark Brown | fbb8993 | 2011-02-11 08:51:52 -0800 | [diff] [blame] | 111 | struct i2c_client *client = to_i2c_client(dev); |
Michael Hennerich | e27c729 | 2010-06-25 08:44:10 -0700 | [diff] [blame] | 112 | struct adxl34x *ac = i2c_get_clientdata(client); |
| 113 | |
Dmitry Torokhov | af6e1d9 | 2010-07-01 09:07:33 -0700 | [diff] [blame] | 114 | adxl34x_suspend(ac); |
Michael Hennerich | e27c729 | 2010-06-25 08:44:10 -0700 | [diff] [blame] | 115 | |
| 116 | return 0; |
| 117 | } |
| 118 | |
Mark Brown | fbb8993 | 2011-02-11 08:51:52 -0800 | [diff] [blame] | 119 | static int adxl34x_i2c_resume(struct device *dev) |
Michael Hennerich | e27c729 | 2010-06-25 08:44:10 -0700 | [diff] [blame] | 120 | { |
Mark Brown | fbb8993 | 2011-02-11 08:51:52 -0800 | [diff] [blame] | 121 | struct i2c_client *client = to_i2c_client(dev); |
Michael Hennerich | e27c729 | 2010-06-25 08:44:10 -0700 | [diff] [blame] | 122 | struct adxl34x *ac = i2c_get_clientdata(client); |
| 123 | |
Dmitry Torokhov | af6e1d9 | 2010-07-01 09:07:33 -0700 | [diff] [blame] | 124 | adxl34x_resume(ac); |
Michael Hennerich | e27c729 | 2010-06-25 08:44:10 -0700 | [diff] [blame] | 125 | |
| 126 | return 0; |
| 127 | } |
Michael Hennerich | e27c729 | 2010-06-25 08:44:10 -0700 | [diff] [blame] | 128 | #endif |
| 129 | |
Mark Brown | fbb8993 | 2011-02-11 08:51:52 -0800 | [diff] [blame] | 130 | static SIMPLE_DEV_PM_OPS(adxl34x_i2c_pm, adxl34x_i2c_suspend, |
| 131 | adxl34x_i2c_resume); |
| 132 | |
Michael Hennerich | e27c729 | 2010-06-25 08:44:10 -0700 | [diff] [blame] | 133 | static const struct i2c_device_id adxl34x_id[] = { |
| 134 | { "adxl34x", 0 }, |
| 135 | { } |
| 136 | }; |
| 137 | |
| 138 | MODULE_DEVICE_TABLE(i2c, adxl34x_id); |
| 139 | |
| 140 | static struct i2c_driver adxl34x_driver = { |
| 141 | .driver = { |
| 142 | .name = "adxl34x", |
| 143 | .owner = THIS_MODULE, |
Mark Brown | fbb8993 | 2011-02-11 08:51:52 -0800 | [diff] [blame] | 144 | .pm = &adxl34x_i2c_pm, |
Michael Hennerich | e27c729 | 2010-06-25 08:44:10 -0700 | [diff] [blame] | 145 | }, |
| 146 | .probe = adxl34x_i2c_probe, |
Bill Pemberton | 1cb0aa8 | 2012-11-23 21:27:39 -0800 | [diff] [blame^] | 147 | .remove = adxl34x_i2c_remove, |
Michael Hennerich | e27c729 | 2010-06-25 08:44:10 -0700 | [diff] [blame] | 148 | .id_table = adxl34x_id, |
| 149 | }; |
| 150 | |
Axel Lin | 1b92c1c | 2012-03-16 23:05:41 -0700 | [diff] [blame] | 151 | module_i2c_driver(adxl34x_driver); |
Michael Hennerich | e27c729 | 2010-06-25 08:44:10 -0700 | [diff] [blame] | 152 | |
| 153 | MODULE_AUTHOR("Michael Hennerich <hennerich@blackfin.uclinux.org>"); |
| 154 | MODULE_DESCRIPTION("ADXL345/346 Three-Axis Digital Accelerometer I2C Bus Driver"); |
| 155 | MODULE_LICENSE("GPL"); |