/* * dummy.c * * Copyright 2010 Wolfson Microelectronics PLC. * * Author: Mark Brown <broonie@opensource.wolfsonmicro.com> * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License as * published by the Free Software Foundation; either version 2 of the * License, or (at your option) any later version. * * This is useful for systems with mixed controllable and * non-controllable regulators, as well as for allowing testing on * systems with no controllable regulators. */ #include <linux/err.h> #include <linux/export.h> #include <linux/platform_device.h> #include <linux/regulator/driver.h> #include <linux/regulator/machine.h> #include "dummy.h" struct regulator_dev *dummy_regulator_rdev; static struct regulator_init_data dummy_initdata; static struct regulator_ops dummy_ops; static struct regulator_desc dummy_desc = { .name = "regulator-dummy", .id = -1, .type = REGULATOR_VOLTAGE, .owner = THIS_MODULE, .ops = &dummy_ops, }; static int dummy_regulator_probe(struct platform_device *pdev) { struct regulator_config config = { }; int ret; config.dev = &pdev->dev; config.init_data = &dummy_initdata; dummy_regulator_rdev = regulator_register(&dummy_desc, &config); if (IS_ERR(dummy_regulator_rdev)) { ret = PTR_ERR(dummy_regulator_rdev); pr_err("Failed to register regulator: %d\n", ret); return ret; } return 0; } static struct platform_driver dummy_regulator_driver = { .probe = dummy_regulator_probe, .driver = { .name = "reg-dummy", .owner = THIS_MODULE, }, }; static struct platform_device *dummy_pdev; void __init regulator_dummy_init(void) { int ret; dummy_pdev = platform_device_alloc("reg-dummy", -1); if (!dummy_pdev) { pr_err("Failed to allocate dummy regulator device\n"); return; } ret = platform_device_add(dummy_pdev); if (ret != 0) { pr_err("Failed to register dummy regulator device: %d\n", ret); platform_device_put(dummy_pdev); return; } ret = platform_driver_register(&dummy_regulator_driver); if (ret != 0) { pr_err("Failed to register dummy regulator driver: %d\n", ret); platform_device_unregister(dummy_pdev); } }