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net/rfkill/rfkill-regulator.c
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/* * rfkill-regulator.c - Regulator consumer driver for rfkill * * Copyright (C) 2009 Guiming Zhuo <gmzhuo@gmail.com> * Copyright (C) 2011 Antonio Ospite <ospite@studenti.unina.it> * * Implementation inspired by leds-regulator driver. * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2 as * published by the Free Software Foundation. * */ #include <linux/module.h> #include <linux/err.h> #include <linux/slab.h> #include <linux/platform_device.h> #include <linux/regulator/consumer.h> #include <linux/rfkill.h> #include <linux/rfkill-regulator.h> struct rfkill_regulator_data { struct rfkill *rf_kill; bool reg_enabled; struct regulator *vcc; }; static int rfkill_regulator_set_block(void *data, bool blocked) { struct rfkill_regulator_data *rfkill_data = data; pr_debug("%s: blocked: %d ", __func__, blocked); if (blocked) { if (rfkill_data->reg_enabled) { regulator_disable(rfkill_data->vcc); |
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rfkill_data->reg_enabled = false; |
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} } else { if (!rfkill_data->reg_enabled) { regulator_enable(rfkill_data->vcc); |
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rfkill_data->reg_enabled = true; |
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} } pr_debug("%s: regulator_is_enabled after set_block: %d ", __func__, regulator_is_enabled(rfkill_data->vcc)); return 0; } struct rfkill_ops rfkill_regulator_ops = { .set_block = rfkill_regulator_set_block, }; static int __devinit rfkill_regulator_probe(struct platform_device *pdev) { struct rfkill_regulator_platform_data *pdata = pdev->dev.platform_data; struct rfkill_regulator_data *rfkill_data; struct regulator *vcc; struct rfkill *rf_kill; int ret = 0; if (pdata == NULL) { dev_err(&pdev->dev, "no platform data "); return -ENODEV; } if (pdata->name == NULL || pdata->type == 0) { dev_err(&pdev->dev, "invalid name or type in platform data "); return -EINVAL; } vcc = regulator_get_exclusive(&pdev->dev, "vrfkill"); if (IS_ERR(vcc)) { dev_err(&pdev->dev, "Cannot get vcc for %s ", pdata->name); ret = PTR_ERR(vcc); goto out; } rfkill_data = kzalloc(sizeof(*rfkill_data), GFP_KERNEL); if (rfkill_data == NULL) { ret = -ENOMEM; goto err_data_alloc; } rf_kill = rfkill_alloc(pdata->name, &pdev->dev, pdata->type, &rfkill_regulator_ops, rfkill_data); if (rf_kill == NULL) { |
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ret = -ENOMEM; goto err_rfkill_alloc; } if (regulator_is_enabled(vcc)) { dev_dbg(&pdev->dev, "Regulator already enabled "); |
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rfkill_data->reg_enabled = true; |
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} rfkill_data->vcc = vcc; rfkill_data->rf_kill = rf_kill; ret = rfkill_register(rf_kill); if (ret) { dev_err(&pdev->dev, "Cannot register rfkill device "); goto err_rfkill_register; } platform_set_drvdata(pdev, rfkill_data); dev_info(&pdev->dev, "%s initialized ", pdata->name); return 0; err_rfkill_register: rfkill_destroy(rf_kill); err_rfkill_alloc: kfree(rfkill_data); err_data_alloc: regulator_put(vcc); out: return ret; } static int __devexit rfkill_regulator_remove(struct platform_device *pdev) { struct rfkill_regulator_data *rfkill_data = platform_get_drvdata(pdev); struct rfkill *rf_kill = rfkill_data->rf_kill; rfkill_unregister(rf_kill); rfkill_destroy(rf_kill); regulator_put(rfkill_data->vcc); kfree(rfkill_data); return 0; } static struct platform_driver rfkill_regulator_driver = { .probe = rfkill_regulator_probe, .remove = __devexit_p(rfkill_regulator_remove), .driver = { .name = "rfkill-regulator", .owner = THIS_MODULE, }, }; |
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module_platform_driver(rfkill_regulator_driver); |
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MODULE_AUTHOR("Guiming Zhuo <gmzhuo@gmail.com>"); MODULE_AUTHOR("Antonio Ospite <ospite@studenti.unina.it>"); MODULE_DESCRIPTION("Regulator consumer driver for rfkill"); MODULE_LICENSE("GPL"); MODULE_ALIAS("platform:rfkill-regulator"); |