diff options
Diffstat (limited to '')
-rw-r--r-- | arch/mips/lantiq/xway/dcdc.c | 60 |
1 files changed, 60 insertions, 0 deletions
diff --git a/arch/mips/lantiq/xway/dcdc.c b/arch/mips/lantiq/xway/dcdc.c new file mode 100644 index 000000000..4960bee0a --- /dev/null +++ b/arch/mips/lantiq/xway/dcdc.c @@ -0,0 +1,60 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * + * Copyright (C) 2012 John Crispin <john@phrozen.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); |