1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * Implements I2C interface for VTI CMA300_D0x Accelerometer driver 4 * 5 * Copyright (C) 2010 Texas Instruments 6 * Author: Hemanth V <hemanthv@ti.com> 7 */ 8 9 #include <linux/module.h> 10 #include <linux/i2c.h> 11 #include <linux/input/cma3000.h> 12 #include "cma3000_d0x.h" 13 14 static int cma3000_i2c_set(struct device *dev, 15 u8 reg, u8 val, char *msg) 16 { 17 struct i2c_client *client = to_i2c_client(dev); 18 int ret; 19 20 ret = i2c_smbus_write_byte_data(client, reg, val); 21 if (ret < 0) 22 dev_err(&client->dev, 23 "%s failed (%s, %d)\n", __func__, msg, ret); 24 return ret; 25 } 26 27 static int cma3000_i2c_read(struct device *dev, u8 reg, char *msg) 28 { 29 struct i2c_client *client = to_i2c_client(dev); 30 int ret; 31 32 ret = i2c_smbus_read_byte_data(client, reg); 33 if (ret < 0) 34 dev_err(&client->dev, 35 "%s failed (%s, %d)\n", __func__, msg, ret); 36 return ret; 37 } 38 39 static const struct cma3000_bus_ops cma3000_i2c_bops = { 40 .bustype = BUS_I2C, 41 #define CMA3000_BUSI2C (0 << 4) 42 .ctrl_mod = CMA3000_BUSI2C, 43 .read = cma3000_i2c_read, 44 .write = cma3000_i2c_set, 45 }; 46 47 static int cma3000_i2c_probe(struct i2c_client *client) 48 { 49 struct cma3000_accl_data *data; 50 51 data = cma3000_init(&client->dev, client->irq, &cma3000_i2c_bops); 52 if (IS_ERR(data)) 53 return PTR_ERR(data); 54 55 i2c_set_clientdata(client, data); 56 57 return 0; 58 } 59 60 static void cma3000_i2c_remove(struct i2c_client *client) 61 { 62 struct cma3000_accl_data *data = i2c_get_clientdata(client); 63 64 cma3000_exit(data); 65 } 66 67 static int cma3000_i2c_suspend(struct device *dev) 68 { 69 struct i2c_client *client = to_i2c_client(dev); 70 struct cma3000_accl_data *data = i2c_get_clientdata(client); 71 72 cma3000_suspend(data); 73 74 return 0; 75 } 76 77 static int cma3000_i2c_resume(struct device *dev) 78 { 79 struct i2c_client *client = to_i2c_client(dev); 80 struct cma3000_accl_data *data = i2c_get_clientdata(client); 81 82 cma3000_resume(data); 83 84 return 0; 85 } 86 87 static const struct dev_pm_ops cma3000_i2c_pm_ops = { 88 .suspend = cma3000_i2c_suspend, 89 .resume = cma3000_i2c_resume, 90 }; 91 92 static const struct i2c_device_id cma3000_i2c_id[] = { 93 { "cma3000_d01" }, 94 { } 95 }; 96 97 MODULE_DEVICE_TABLE(i2c, cma3000_i2c_id); 98 99 static struct i2c_driver cma3000_i2c_driver = { 100 .probe = cma3000_i2c_probe, 101 .remove = cma3000_i2c_remove, 102 .id_table = cma3000_i2c_id, 103 .driver = { 104 .name = "cma3000_i2c_accl", 105 .pm = pm_sleep_ptr(&cma3000_i2c_pm_ops), 106 }, 107 }; 108 109 module_i2c_driver(cma3000_i2c_driver); 110 111 MODULE_DESCRIPTION("CMA3000-D0x Accelerometer I2C Driver"); 112 MODULE_LICENSE("GPL"); 113 MODULE_AUTHOR("Hemanth V <hemanthv@ti.com>"); 114