1 /* 2 * dummy.c 3 * 4 * Copyright 2010 Wolfson Microelectronics PLC. 5 * 6 * Author: Mark Brown <broonie@opensource.wolfsonmicro.com> 7 * 8 * This program is free software; you can redistribute it and/or 9 * modify it under the terms of the GNU General Public License as 10 * published by the Free Software Foundation; either version 2 of the 11 * License, or (at your option) any later version. 12 * 13 * This is useful for systems with mixed controllable and 14 * non-controllable regulators, as well as for allowing testing on 15 * systems with no controllable regulators. 16 */ 17 18 #include <linux/err.h> 19 #include <linux/platform_device.h> 20 #include <linux/regulator/driver.h> 21 #include <linux/regulator/machine.h> 22 23 #include "dummy.h" 24 25 struct regulator_dev *dummy_regulator_rdev; 26 27 static struct regulator_init_data dummy_initdata; 28 29 static struct regulator_ops dummy_ops; 30 31 static struct regulator_desc dummy_desc = { 32 .name = "dummy", 33 .id = -1, 34 .type = REGULATOR_VOLTAGE, 35 .owner = THIS_MODULE, 36 .ops = &dummy_ops, 37 }; 38 39 static struct platform_device *dummy_pdev; 40 41 void __init regulator_dummy_init(void) 42 { 43 int ret; 44 45 dummy_pdev = platform_device_alloc("reg-dummy", -1); 46 if (!dummy_pdev) { 47 pr_err("Failed to allocate dummy regulator device\n"); 48 return; 49 } 50 51 ret = platform_device_add(dummy_pdev); 52 if (ret != 0) { 53 pr_err("Failed to register dummy regulator device: %d\n", ret); 54 platform_device_put(dummy_pdev); 55 return; 56 } 57 58 dummy_regulator_rdev = regulator_register(&dummy_desc, NULL, 59 &dummy_initdata, NULL); 60 if (IS_ERR(dummy_regulator_rdev)) { 61 ret = PTR_ERR(dummy_regulator_rdev); 62 pr_err("Failed to register regulator: %d\n", ret); 63 platform_device_unregister(dummy_pdev); 64 return; 65 } 66 } 67