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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 | /* * 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/of.h> #include <linux/types.h> #include <linux/pm.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, ®, 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 adxl34x_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 adxl34x_i2c_bops = { .bustype = BUS_I2C, .write = adxl34x_smbus_write, .read = adxl34x_smbus_read, .read_block = adxl34x_i2c_read_block, }; static int 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) ? &adxl34x_smbus_bops : &adxl34x_i2c_bops); if (IS_ERR(ac)) return PTR_ERR(ac); i2c_set_clientdata(client, ac); return 0; } static int adxl34x_i2c_remove(struct i2c_client *client) { struct adxl34x *ac = i2c_get_clientdata(client); return adxl34x_remove(ac); } static int __maybe_unused adxl34x_i2c_suspend(struct device *dev) { struct i2c_client *client = to_i2c_client(dev); struct adxl34x *ac = i2c_get_clientdata(client); adxl34x_suspend(ac); return 0; } static int __maybe_unused adxl34x_i2c_resume(struct device *dev) { struct i2c_client *client = to_i2c_client(dev); struct adxl34x *ac = i2c_get_clientdata(client); adxl34x_resume(ac); return 0; } static SIMPLE_DEV_PM_OPS(adxl34x_i2c_pm, adxl34x_i2c_suspend, adxl34x_i2c_resume); static const struct i2c_device_id adxl34x_id[] = { { "adxl34x", 0 }, { } }; MODULE_DEVICE_TABLE(i2c, adxl34x_id); #ifdef CONFIG_OF static const struct of_device_id adxl34x_of_id[] = { /* * The ADXL346 is backward-compatible with the ADXL345. Differences are * handled by runtime detection of the device model, there's thus no * need for listing the "adi,adxl346" compatible value explicitly. */ { .compatible = "adi,adxl345", }, /* * Deprecated, DT nodes should use one or more of the device-specific * compatible values "adi,adxl345" and "adi,adxl346". */ { .compatible = "adi,adxl34x", }, { } }; MODULE_DEVICE_TABLE(of, adxl34x_of_id); #endif static struct i2c_driver adxl34x_driver = { .driver = { .name = "adxl34x", .pm = &adxl34x_i2c_pm, .of_match_table = of_match_ptr(adxl34x_of_id), }, .probe = adxl34x_i2c_probe, .remove = adxl34x_i2c_remove, .id_table = adxl34x_id, }; module_i2c_driver(adxl34x_driver); MODULE_AUTHOR("Michael Hennerich <hennerich@blackfin.uclinux.org>"); MODULE_DESCRIPTION("ADXL345/346 Three-Axis Digital Accelerometer I2C Bus Driver"); MODULE_LICENSE("GPL"); |