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 const struct i2c_device_id *id) 49 { 50 struct cma3000_accl_data *data; 51 52 data = cma3000_init(&client->dev, client->irq, &cma3000_i2c_bops); 53 if (IS_ERR(data)) 54 return PTR_ERR(data); 55 56 i2c_set_clientdata(client, data); 57 58 return 0; 59 } 60 61 static void cma3000_i2c_remove(struct i2c_client *client) 62 { 63 struct cma3000_accl_data *data = i2c_get_clientdata(client); 64 65 cma3000_exit(data); 66 } 67 68 #ifdef CONFIG_PM 69 static int cma3000_i2c_suspend(struct device *dev) 70 { 71 struct i2c_client *client = to_i2c_client(dev); 72 struct cma3000_accl_data *data = i2c_get_clientdata(client); 73 74 cma3000_suspend(data); 75 76 return 0; 77 } 78 79 static int cma3000_i2c_resume(struct device *dev) 80 { 81 struct i2c_client *client = to_i2c_client(dev); 82 struct cma3000_accl_data *data = i2c_get_clientdata(client); 83 84 cma3000_resume(data); 85 86 return 0; 87 } 88 89 static const struct dev_pm_ops cma3000_i2c_pm_ops = { 90 .suspend = cma3000_i2c_suspend, 91 .resume = cma3000_i2c_resume, 92 }; 93 #endif 94 95 static const struct i2c_device_id cma3000_i2c_id[] = { 96 { "cma3000_d01", 0 }, 97 { }, 98 }; 99 100 MODULE_DEVICE_TABLE(i2c, cma3000_i2c_id); 101 102 static struct i2c_driver cma3000_i2c_driver = { 103 .probe = cma3000_i2c_probe, 104 .remove = cma3000_i2c_remove, 105 .id_table = cma3000_i2c_id, 106 .driver = { 107 .name = "cma3000_i2c_accl", 108 #ifdef CONFIG_PM 109 .pm = &cma3000_i2c_pm_ops, 110 #endif 111 }, 112 }; 113 114 module_i2c_driver(cma3000_i2c_driver); 115 116 MODULE_DESCRIPTION("CMA3000-D0x Accelerometer I2C Driver"); 117 MODULE_LICENSE("GPL"); 118 MODULE_AUTHOR("Hemanth V <hemanthv@ti.com>"); 119