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d2912cb15b
Based on 2 normalized pattern(s): 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 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 # extracted by the scancode license scanner the SPDX license identifier GPL-2.0-only has been chosen to replace the boilerplate/reference in 4122 file(s). Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Enrico Weigelt <info@metux.net> Reviewed-by: Kate Stewart <kstewart@linuxfoundation.org> Reviewed-by: Allison Randal <allison@lohutok.net> Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190604081206.933168790@linutronix.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
60 lines
1.3 KiB
C
60 lines
1.3 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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/*
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*
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* Copyright (C) 2012 John Crispin <john@phrozen.org>
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* Copyright (C) 2010 Sameer Ahmad, Lantiq GmbH
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*/
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#include <linux/ioport.h>
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#include <linux/of_platform.h>
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#include <lantiq_soc.h>
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/* Bias and regulator Setup Register */
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#define DCDC_BIAS_VREG0 0xa
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/* Bias and regulator Setup Register */
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#define DCDC_BIAS_VREG1 0xb
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#define dcdc_w8(x, y) ltq_w8((x), dcdc_membase + (y))
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#define dcdc_r8(x) ltq_r8(dcdc_membase + (x))
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static void __iomem *dcdc_membase;
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static int dcdc_probe(struct platform_device *pdev)
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{
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struct resource *res;
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res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
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dcdc_membase = devm_ioremap_resource(&pdev->dev, res);
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if (IS_ERR(dcdc_membase))
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return PTR_ERR(dcdc_membase);
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dev_info(&pdev->dev, "Core Voltage : %d mV\n",
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dcdc_r8(DCDC_BIAS_VREG1) * 8);
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return 0;
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}
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static const struct of_device_id dcdc_match[] = {
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{ .compatible = "lantiq,dcdc-xrx200" },
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{},
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};
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static struct platform_driver dcdc_driver = {
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.probe = dcdc_probe,
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.driver = {
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.name = "dcdc-xrx200",
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.of_match_table = dcdc_match,
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},
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};
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int __init dcdc_init(void)
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{
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int ret = platform_driver_register(&dcdc_driver);
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if (ret)
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pr_info("dcdc: Error registering platform driver\n");
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return ret;
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}
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arch_initcall(dcdc_init);
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