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60 lines
1.2 KiB
60 lines
1.2 KiB
/* rtc-starfire.c: Starfire platform RTC driver. |
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* |
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* Author: David S. Miller |
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* License: GPL |
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* |
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* Copyright (C) 2008 David S. Miller <[email protected]> |
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*/ |
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#include <linux/kernel.h> |
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#include <linux/init.h> |
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#include <linux/rtc.h> |
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#include <linux/platform_device.h> |
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#include <asm/oplib.h> |
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static u32 starfire_get_time(void) |
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{ |
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static char obp_gettod[32]; |
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static u32 unix_tod; |
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sprintf(obp_gettod, "h# %08x unix-gettod", |
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(unsigned int) (long) &unix_tod); |
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prom_feval(obp_gettod); |
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return unix_tod; |
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} |
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static int starfire_read_time(struct device *dev, struct rtc_time *tm) |
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{ |
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rtc_time64_to_tm(starfire_get_time(), tm); |
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return 0; |
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} |
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static const struct rtc_class_ops starfire_rtc_ops = { |
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.read_time = starfire_read_time, |
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}; |
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static int __init starfire_rtc_probe(struct platform_device *pdev) |
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{ |
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struct rtc_device *rtc; |
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rtc = devm_rtc_allocate_device(&pdev->dev); |
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if (IS_ERR(rtc)) |
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return PTR_ERR(rtc); |
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rtc->ops = &starfire_rtc_ops; |
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rtc->range_max = U32_MAX; |
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platform_set_drvdata(pdev, rtc); |
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return devm_rtc_register_device(rtc); |
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} |
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static struct platform_driver starfire_rtc_driver = { |
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.driver = { |
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.name = "rtc-starfire", |
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}, |
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}; |
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builtin_platform_driver_probe(starfire_rtc_driver, starfire_rtc_probe);
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