qwx495460
125 lines
3.2 KiB
C
125 lines
3.2 KiB
C
/*
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* Device driver for hi3xxx power manger
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*
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* Copyright (c) 2013 Linaro Ltd.
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* Copyright (c) 2011 Hisilicon.
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*
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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*/
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#include <linux/slab.h>
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#include <linux/device.h>
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#include <linux/module.h>
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#include <linux/err.h>
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#include <linux/io.h>
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#include <linux/platform_device.h>
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#include <linux/of.h>
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#include <linux/of_device.h>
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#include <linux/of_address.h>
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#include <linux/mfd/hisi_ip_core.h>
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static DEFINE_MUTEX(reg_lock_mutex);
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static struct of_device_id of_hisi_regulator_ip_core_child_match_tbl[] = {
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/* regulators */
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{
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.compatible = "ip-regulator-atf",
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},
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{ /* end */ }
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};
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static struct of_device_id of_hisi_regulator_ip_core_match_tbl[] = {
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{
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.compatible = "hisilicon,hisi_regulator_ip_atf_core",
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},
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{ /* end */ }
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};
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static int hisi_regulator_ip_core_probe(struct platform_device *pdev)
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{
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struct device *dev = &pdev->dev;
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struct device_node *np = dev->of_node;
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struct hisi_regulator_ip_core *pmic = NULL;
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int ret = 0;
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pmic = devm_kzalloc(dev, sizeof(*pmic), GFP_KERNEL);
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if (!pmic) {
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dev_err(dev, "cannot allocate hisi_regulator_ip_core device info\n");
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return -ENOMEM;
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}
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/* get resources */
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pmic->res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
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if (!pmic->res) {
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dev_err(dev, "platform_get_resource err !\n");
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return -ENOENT;/*lint !e429*/
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}
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if (!devm_request_mem_region(dev, pmic->res->start,
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resource_size(pmic->res),
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pdev->name)) {
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dev_err(dev, "cannot claim register memory\n");
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return -ENOMEM;/*lint !e429*/
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}
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pmic->regs = devm_ioremap(dev, pmic->res->start,
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resource_size(pmic->res));
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if (!pmic->regs) {
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dev_err(dev, "cannot map register memory\n");
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return -ENOMEM;/*lint !e429*/
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}
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platform_set_drvdata(pdev, pmic);
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of_platform_populate(np, of_hisi_regulator_ip_core_child_match_tbl, NULL, dev);
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return ret;/*lint !e429*/
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}
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static int hisi_regulator_ip_core_remove(struct platform_device *pdev)
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{
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struct device *dev = &pdev->dev;
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struct hisi_regulator_ip_core *pmic = platform_get_drvdata(pdev);
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devm_iounmap(dev, pmic->regs);
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devm_release_mem_region(dev, pmic->res->start,
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resource_size(pmic->res));
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devm_kfree(dev, pmic);
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platform_set_drvdata(pdev, NULL);
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return 0;
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}
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static struct platform_driver hisi_regulator_ip_core_driver = {
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.driver = {
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.name = "hisi_regulator_ip_core",
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.owner = THIS_MODULE,
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.of_match_table = of_hisi_regulator_ip_core_match_tbl,
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},
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.probe = hisi_regulator_ip_core_probe,
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.remove = hisi_regulator_ip_core_remove,
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};
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static int __init hisi_regulator_ip_core_init(void)
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{
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return platform_driver_register(&hisi_regulator_ip_core_driver);
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}
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fs_initcall(hisi_regulator_ip_core_init);
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static void __exit hisi_regulator_ip_core_exit(void)
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{
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platform_driver_unregister(&hisi_regulator_ip_core_driver);
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}
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module_exit(hisi_regulator_ip_core_exit);
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MODULE_DESCRIPTION("Hisi regulator ip driver");
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MODULE_LICENSE("GPL v2");
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