rtc: Add Starfire platform RTC driver. (de2cf332) · Commits · e / devices / android_kernel_fairphone_FP4

drivers/rtc/Kconfig

+7 −0

Original line number	Diff line number	Diff line
		@@ -599,4 +599,11 @@ config RTC_DRV_SUN4V
		If you say Y here you will get support for the Hypervisor
		based RTC on SUN4V systems.

		config RTC_DRV_STARFIRE
		bool "Starfire RTC"
		depends on SPARC64
		help
		If you say Y here you will get support for the RTC found on
		Starfire systems.

		endif # RTC_CLASS

drivers/rtc/Makefile

+1 −0

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		@@ -40,6 +40,7 @@ obj-$(CONFIG_RTC_DRV_M48T59) += rtc-m48t59.o
		obj-$(CONFIG_RTC_DRV_M48T86) += rtc-m48t86.o
		obj-$(CONFIG_RTC_DRV_BQ4802) += rtc-bq4802.o
		obj-$(CONFIG_RTC_DRV_SUN4V) += rtc-sun4v.o
		obj-$(CONFIG_RTC_DRV_STARFIRE) += rtc-starfire.o
		obj-$(CONFIG_RTC_DRV_MAX6900) += rtc-max6900.o
		obj-$(CONFIG_RTC_DRV_MAX6902) += rtc-max6902.o
		obj-$(CONFIG_RTC_DRV_OMAP) += rtc-omap.o

drivers/rtc/rtc-starfire.c

0 → 100644

+120 −0

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		/* rtc-starfire.c: Starfire platform RTC driver.
		*
		* Copyright (C) 2008 David S. Miller <davem@davemloft.net>
		*/

		#include <linux/kernel.h>
		#include <linux/module.h>
		#include <linux/init.h>
		#include <linux/time.h>
		#include <linux/rtc.h>
		#include <linux/platform_device.h>

		#include <asm/oplib.h>

		MODULE_AUTHOR("David S. Miller <davem@davemloft.net>");
		MODULE_DESCRIPTION("Starfire RTC driver");
		MODULE_LICENSE("GPL");

		struct starfire_rtc {
		struct rtc_device *rtc;
		spinlock_t lock;
		};

		static u32 starfire_get_time(void)
		{
		static char obp_gettod[32];
		static u32 unix_tod;

		sprintf(obp_gettod, "h# %08x unix-gettod",
		(unsigned int) (long) &unix_tod);
		prom_feval(obp_gettod);

		return unix_tod;
		}

		static int starfire_read_time(struct device dev, struct rtc_time tm)
		{
		struct starfire_rtc *p = dev_get_drvdata(dev);
		unsigned long flags, secs;

		spin_lock_irqsave(&p->lock, flags);
		secs = starfire_get_time();
		spin_unlock_irqrestore(&p->lock, flags);

		rtc_time_to_tm(secs, tm);

		return 0;
		}

		static int starfire_set_time(struct device dev, struct rtc_time tm)
		{
		unsigned long secs;
		int err;

		err = rtc_tm_to_time(tm, &secs);
		if (err)
		return err;

		/* Do nothing, time is set using the service processor
		* console on this platform.
		*/
		return 0;
		}

		static const struct rtc_class_ops starfire_rtc_ops = {
		.read_time = starfire_read_time,
		.set_time = starfire_set_time,
		};

		static int __devinit starfire_rtc_probe(struct platform_device *pdev)
		{
		struct starfire_rtc p = kzalloc(sizeof(p), GFP_KERNEL);

		if (!p)
		return -ENOMEM;

		spin_lock_init(&p->lock);

		p->rtc = rtc_device_register("starfire", &pdev->dev,
		&starfire_rtc_ops, THIS_MODULE);
		if (IS_ERR(p->rtc)) {
		int err = PTR_ERR(p->rtc);
		kfree(p);
		return err;
		}
		platform_set_drvdata(pdev, p);
		return 0;
		}

		static int __devexit starfire_rtc_remove(struct platform_device *pdev)
		{
		struct starfire_rtc *p = platform_get_drvdata(pdev);

		rtc_device_unregister(p->rtc);
		kfree(p);

		return 0;
		}

		static struct platform_driver starfire_rtc_driver = {
		.driver = {
		.name = "rtc-starfire",
		.owner = THIS_MODULE,
		},
		.probe = starfire_rtc_probe,
		.remove = __devexit_p(starfire_rtc_remove),
		};

		static int __init starfire_rtc_init(void)
		{
		return platform_driver_register(&starfire_rtc_driver);
		}

		static void __exit starfire_rtc_exit(void)
		{
		platform_driver_unregister(&starfire_rtc_driver);
		}

		module_init(starfire_rtc_init);
		module_exit(starfire_rtc_exit);