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| 2 | |
| 3 | * PS3 RTC Driver
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| 4 | *
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| 5 | * Copyright 2009 Sony Corporation
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| 6 |
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| 7 |
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| 8 | #include <linux/kernel.h>
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| 9 | #include <linux/module.h>
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| 10 | #include <linux/platform_device.h>
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| 11 | #include <linux/rtc.h>
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| 12 |
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| 13 | #include <asm/lv1call.h>
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| 14 | #include <asm/ps3.h>
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| 15 |
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| 16 |
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| 17 | static u64 read_rtc(void)
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| 18 | {
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| 19 | int result;
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| 20 | u64 rtc_val;
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| 21 | u64 tb_val;
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| 22 |
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| 23 | result = lv1_get_rtc(&rtc_val, &tb_val);
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| 24 | BUG_ON(result);
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| 25 |
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| 26 | return rtc_val;
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| 27 | }
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| 28 |
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| 29 | static int ps3_get_time(struct device *dev, struct rtc_time *tm)
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| 30 | {
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| 31 | rtc_time64_to_tm(read_rtc() + ps3_os_area_get_rtc_diff(), tm);
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| 32 | return 0;
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| 33 | }
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| 34 |
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| 35 | static int ps3_set_time(struct device *dev, struct rtc_time *tm)
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| 36 | {
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| 37 | ps3_os_area_set_rtc_diff(rtc_tm_to_time64(tm) - read_rtc());
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| 38 | return 0;
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| 39 | }
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| 40 |
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| 41 | static const struct rtc_class_ops ps3_rtc_ops = {
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| 42 | .read_time = ps3_get_time,
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| 43 | .set_time = ps3_set_time,
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| 44 | };
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| 45 |
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| 46 | static int __init ps3_rtc_probe(struct platform_device *dev)
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| 47 | {
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| 48 | struct rtc_device *rtc;
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| 49 |
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| 50 | rtc = devm_rtc_allocate_device(&dev->dev);
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| 51 | if (IS_ERR(rtc))
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| 52 | return PTR_ERR(rtc);
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| 53 |
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| 54 | rtc->ops = &ps3_rtc_ops;
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| 55 | rtc->range_max = U64_MAX;
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| 56 |
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| 57 | platform_set_drvdata(dev, rtc);
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| 58 |
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| 59 | return devm_rtc_register_device(rtc);
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| 60 | }
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| 61 |
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| 62 | static struct platform_driver ps3_rtc_driver = {
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| 63 | .driver = {
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| 64 | .name = "rtc-ps3",
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| 65 | },
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| 66 | };
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| 67 |
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| 68 | module_platform_driver_probe(ps3_rtc_driver, ps3_rtc_probe);
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| 69 |
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| 70 | MODULE_AUTHOR("Sony Corporation");
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| 71 | MODULE_LICENSE("GPL");
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| 72 | MODULE_DESCRIPTION("ps3 RTC driver");
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| 73 | MODULE_ALIAS("platform:rtc-ps3");
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