mirror of https://gitee.com/openkylin/linux.git
63 lines
1.4 KiB
C
63 lines
1.4 KiB
C
/*
|
|
* 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.
|
|
*
|
|
* Copyright (C) 2012 John Crispin <blogic@openwrt.org>
|
|
* Copyright (C) 2010 Sameer Ahmad, Lantiq GmbH
|
|
*/
|
|
|
|
#include <linux/ioport.h>
|
|
#include <linux/of_platform.h>
|
|
|
|
#include <lantiq_soc.h>
|
|
|
|
/* Bias and regulator Setup Register */
|
|
#define DCDC_BIAS_VREG0 0xa
|
|
/* Bias and regulator Setup Register */
|
|
#define DCDC_BIAS_VREG1 0xb
|
|
|
|
#define dcdc_w8(x, y) ltq_w8((x), dcdc_membase + (y))
|
|
#define dcdc_r8(x) ltq_r8(dcdc_membase + (x))
|
|
|
|
static void __iomem *dcdc_membase;
|
|
|
|
static int dcdc_probe(struct platform_device *pdev)
|
|
{
|
|
struct resource *res;
|
|
|
|
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
|
|
dcdc_membase = devm_ioremap_resource(&pdev->dev, res);
|
|
if (IS_ERR(dcdc_membase))
|
|
return PTR_ERR(dcdc_membase);
|
|
|
|
dev_info(&pdev->dev, "Core Voltage : %d mV\n",
|
|
dcdc_r8(DCDC_BIAS_VREG1) * 8);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static const struct of_device_id dcdc_match[] = {
|
|
{ .compatible = "lantiq,dcdc-xrx200" },
|
|
{},
|
|
};
|
|
|
|
static struct platform_driver dcdc_driver = {
|
|
.probe = dcdc_probe,
|
|
.driver = {
|
|
.name = "dcdc-xrx200",
|
|
.of_match_table = dcdc_match,
|
|
},
|
|
};
|
|
|
|
int __init dcdc_init(void)
|
|
{
|
|
int ret = platform_driver_register(&dcdc_driver);
|
|
|
|
if (ret)
|
|
pr_info("dcdc: Error registering platform driver\n");
|
|
return ret;
|
|
}
|
|
|
|
arch_initcall(dcdc_init);
|