unicore32: move rtc-puv3.c to drivers/rtc directory
authorGuan Xuetao <gxt@mprc.pku.edu.cn>
Thu, 26 May 2011 08:43:27 +0000 (16:43 +0800)
committerGuan Xuetao <gxt@mprc.pku.edu.cn>
Thu, 9 Jun 2011 08:15:24 +0000 (16:15 +0800)
The patch moves rtc driver for PKUnity-v3 SoC from arch/unicore32/kernel/
to drivers/rtc/, with renaming it to rtc-puv3.c.
Also, Kconfig, Makefile, and MAINTAINERS are modified correspondingly.

Signed-off-by: Guan Xuetao <gxt@mprc.pku.edu.cn>
Acked-by: Arnd Bergmann <arnd@arndb.de>
MAINTAINERS
arch/unicore32/Kconfig
arch/unicore32/configs/debug_defconfig
arch/unicore32/kernel/Makefile
arch/unicore32/kernel/rtc.c [deleted file]
drivers/rtc/Kconfig
drivers/rtc/Makefile
drivers/rtc/rtc-puv3.c [new file with mode: 0644]

index b5ea4d033730c75630b1dcc22531da63f56845e3..bbe49d8c22afb024a9fe10fe7146d7ced5cc18f1 100644 (file)
@@ -4945,6 +4945,7 @@ T:        git git://git.kernel.org/pub/scm/linux/kernel/git/epip/linux-2.6-unicore32.gi
 F:     drivers/input/serio/i8042-unicore32io.h
 F:     drivers/i2c/busses/i2c-puv3.c
 F:     drivers/video/fb-puv3.c
+F:     drivers/rtc/rtc-puv3.c
 
 PMC SIERRA MaxRAID DRIVER
 M:     Anil Ravindranath <anil_ravindranath@pmc-sierra.com>
index d3a303246c9f0967ff1ac86e9359eded8fae15da..e57dcce9bfda4da6ea6be362a542bf891289f0c0 100644 (file)
@@ -231,10 +231,6 @@ config PUV3_PWM
        help
          Enable support for NB0916 PWM controllers
 
-config PUV3_RTC
-       tristate "PKUnity v3 RTC Support"
-       depends on !ARCH_FPGA
-
 if PUV3_NB0916
 
 menu "PKUnity NetBook-0916 Features"
index b5fbde9f1cb2cf8623e911178916e7595b6acbde..9b9c2519a38fea8218645a2edab04beb047b7e68 100644 (file)
@@ -64,7 +64,6 @@ CONFIG_I2C_BATTERY_BQ27200=n
 CONFIG_I2C_EEPROM_AT24=n
 CONFIG_LCD_BACKLIGHT=n
 
-CONFIG_PUV3_RTC=y
 CONFIG_PUV3_UMAL=y
 CONFIG_PUV3_MUSB=n
 CONFIG_PUV3_AC97=n
@@ -167,8 +166,9 @@ CONFIG_LEDS_TRIGGER_IDE_DISK=y
 CONFIG_LEDS_TRIGGER_HEARTBEAT=y
 
 #      Real Time Clock
-CONFIG_RTC_LIB=m
-CONFIG_RTC_CLASS=m
+CONFIG_RTC_LIB=y
+CONFIG_RTC_CLASS=y
+CONFIG_RTC_DRV_PUV3=y
 
 ### File systems
 CONFIG_EXT2_FS=m
index ec23a2fb2f508646d38c76ce7bbd89ed20bc8168..aeb0f181568e39f5537f70d7078163c09f29c2cb 100644 (file)
@@ -16,7 +16,6 @@ obj-$(CONFIG_UNICORE_FPU_F64) += fpu-ucf64.o
 obj-$(CONFIG_ARCH_PUV3)                += clock.o irq.o time.o
 
 obj-$(CONFIG_PUV3_GPIO)                += gpio.o
-obj-$(CONFIG_PUV3_RTC)         += rtc.o
 obj-$(CONFIG_PUV3_PWM)         += pwm.o
 obj-$(CONFIG_PUV3_PM)          += pm.o sleep.o
 obj-$(CONFIG_HIBERNATION)      += hibernate.o hibernate_asm.o
diff --git a/arch/unicore32/kernel/rtc.c b/arch/unicore32/kernel/rtc.c
deleted file mode 100644 (file)
index 8cad70b..0000000
+++ /dev/null
@@ -1,371 +0,0 @@
-/*
- * linux/arch/unicore32/kernel/rtc.c
- *
- * Code specific to PKUnity SoC and UniCore ISA
- *
- *     Maintained by GUAN Xue-tao <gxt@mprc.pku.edu.cn>
- *     Copyright (C) 2001-2010 Guan Xuetao
- *
- * 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.
- */
-
-#include <linux/module.h>
-#include <linux/fs.h>
-#include <linux/string.h>
-#include <linux/init.h>
-#include <linux/platform_device.h>
-#include <linux/interrupt.h>
-#include <linux/rtc.h>
-#include <linux/bcd.h>
-#include <linux/clk.h>
-#include <linux/log2.h>
-#include <linux/slab.h>
-#include <linux/uaccess.h>
-#include <linux/io.h>
-
-#include <asm/irq.h>
-#include <mach/hardware.h>
-
-static struct resource *puv3_rtc_mem;
-
-static int puv3_rtc_alarmno = IRQ_RTCAlarm;
-static int puv3_rtc_tickno  = IRQ_RTC;
-
-static DEFINE_SPINLOCK(puv3_rtc_pie_lock);
-
-/* IRQ Handlers */
-
-static irqreturn_t puv3_rtc_alarmirq(int irq, void *id)
-{
-       struct rtc_device *rdev = id;
-
-       writel(readl(RTC_RTSR) | RTC_RTSR_AL, RTC_RTSR);
-       rtc_update_irq(rdev, 1, RTC_AF | RTC_IRQF);
-       return IRQ_HANDLED;
-}
-
-static irqreturn_t puv3_rtc_tickirq(int irq, void *id)
-{
-       struct rtc_device *rdev = id;
-
-       writel(readl(RTC_RTSR) | RTC_RTSR_HZ, RTC_RTSR);
-       rtc_update_irq(rdev, 1, RTC_PF | RTC_IRQF);
-       return IRQ_HANDLED;
-}
-
-/* Update control registers */
-static void puv3_rtc_setaie(int to)
-{
-       unsigned int tmp;
-
-       pr_debug("%s: aie=%d\n", __func__, to);
-
-       tmp = readl(RTC_RTSR) & ~RTC_RTSR_ALE;
-
-       if (to)
-               tmp |= RTC_RTSR_ALE;
-
-       writel(tmp, RTC_RTSR);
-}
-
-static int puv3_rtc_setpie(struct device *dev, int enabled)
-{
-       unsigned int tmp;
-
-       pr_debug("%s: pie=%d\n", __func__, enabled);
-
-       spin_lock_irq(&puv3_rtc_pie_lock);
-       tmp = readl(RTC_RTSR) & ~RTC_RTSR_HZE;
-
-       if (enabled)
-               tmp |= RTC_RTSR_HZE;
-
-       writel(tmp, RTC_RTSR);
-       spin_unlock_irq(&puv3_rtc_pie_lock);
-
-       return 0;
-}
-
-/* Time read/write */
-
-static int puv3_rtc_gettime(struct device *dev, struct rtc_time *rtc_tm)
-{
-       rtc_time_to_tm(readl(RTC_RCNR), rtc_tm);
-
-       pr_debug("read time %02x.%02x.%02x %02x/%02x/%02x\n",
-                rtc_tm->tm_year, rtc_tm->tm_mon, rtc_tm->tm_mday,
-                rtc_tm->tm_hour, rtc_tm->tm_min, rtc_tm->tm_sec);
-
-       return 0;
-}
-
-static int puv3_rtc_settime(struct device *dev, struct rtc_time *tm)
-{
-       unsigned long rtc_count = 0;
-
-       pr_debug("set time %02d.%02d.%02d %02d/%02d/%02d\n",
-                tm->tm_year, tm->tm_mon, tm->tm_mday,
-                tm->tm_hour, tm->tm_min, tm->tm_sec);
-
-       rtc_tm_to_time(tm, &rtc_count);
-       writel(rtc_count, RTC_RCNR);
-
-       return 0;
-}
-
-static int puv3_rtc_getalarm(struct device *dev, struct rtc_wkalrm *alrm)
-{
-       struct rtc_time *alm_tm = &alrm->time;
-
-       rtc_time_to_tm(readl(RTC_RTAR), alm_tm);
-
-       alrm->enabled = readl(RTC_RTSR) & RTC_RTSR_ALE;
-
-       pr_debug("read alarm %02x %02x.%02x.%02x %02x/%02x/%02x\n",
-                alrm->enabled,
-                alm_tm->tm_year, alm_tm->tm_mon, alm_tm->tm_mday,
-                alm_tm->tm_hour, alm_tm->tm_min, alm_tm->tm_sec);
-
-       return 0;
-}
-
-static int puv3_rtc_setalarm(struct device *dev, struct rtc_wkalrm *alrm)
-{
-       struct rtc_time *tm = &alrm->time;
-       unsigned long rtcalarm_count = 0;
-
-       pr_debug("puv3_rtc_setalarm: %d, %02x/%02x/%02x %02x.%02x.%02x\n",
-                alrm->enabled,
-                tm->tm_mday & 0xff, tm->tm_mon & 0xff, tm->tm_year & 0xff,
-                tm->tm_hour & 0xff, tm->tm_min & 0xff, tm->tm_sec);
-
-       rtc_tm_to_time(tm, &rtcalarm_count);
-       writel(rtcalarm_count, RTC_RTAR);
-
-       puv3_rtc_setaie(alrm->enabled);
-
-       if (alrm->enabled)
-               enable_irq_wake(puv3_rtc_alarmno);
-       else
-               disable_irq_wake(puv3_rtc_alarmno);
-
-       return 0;
-}
-
-static int puv3_rtc_proc(struct device *dev, struct seq_file *seq)
-{
-       seq_printf(seq, "periodic_IRQ\t: %s\n",
-                    (readl(RTC_RTSR) & RTC_RTSR_HZE) ? "yes" : "no");
-       return 0;
-}
-
-static int puv3_rtc_open(struct device *dev)
-{
-       struct platform_device *pdev = to_platform_device(dev);
-       struct rtc_device *rtc_dev = platform_get_drvdata(pdev);
-       int ret;
-
-       ret = request_irq(puv3_rtc_alarmno, puv3_rtc_alarmirq,
-                         IRQF_DISABLED,  "pkunity-rtc alarm", rtc_dev);
-
-       if (ret) {
-               dev_err(dev, "IRQ%d error %d\n", puv3_rtc_alarmno, ret);
-               return ret;
-       }
-
-       ret = request_irq(puv3_rtc_tickno, puv3_rtc_tickirq,
-                         IRQF_DISABLED,  "pkunity-rtc tick", rtc_dev);
-
-       if (ret) {
-               dev_err(dev, "IRQ%d error %d\n", puv3_rtc_tickno, ret);
-               goto tick_err;
-       }
-
-       return ret;
-
- tick_err:
-       free_irq(puv3_rtc_alarmno, rtc_dev);
-       return ret;
-}
-
-static void puv3_rtc_release(struct device *dev)
-{
-       struct platform_device *pdev = to_platform_device(dev);
-       struct rtc_device *rtc_dev = platform_get_drvdata(pdev);
-
-       /* do not clear AIE here, it may be needed for wake */
-
-       puv3_rtc_setpie(dev, 0);
-       free_irq(puv3_rtc_alarmno, rtc_dev);
-       free_irq(puv3_rtc_tickno, rtc_dev);
-}
-
-static const struct rtc_class_ops puv3_rtcops = {
-       .open           = puv3_rtc_open,
-       .release        = puv3_rtc_release,
-       .read_time      = puv3_rtc_gettime,
-       .set_time       = puv3_rtc_settime,
-       .read_alarm     = puv3_rtc_getalarm,
-       .set_alarm      = puv3_rtc_setalarm,
-       .proc           = puv3_rtc_proc,
-};
-
-static void puv3_rtc_enable(struct platform_device *pdev, int en)
-{
-       if (!en) {
-               writel(readl(RTC_RTSR) & ~RTC_RTSR_HZE, RTC_RTSR);
-       } else {
-               /* re-enable the device, and check it is ok */
-
-               if ((readl(RTC_RTSR) & RTC_RTSR_HZE) == 0) {
-                       dev_info(&pdev->dev, "rtc disabled, re-enabling\n");
-                       writel(readl(RTC_RTSR) | RTC_RTSR_HZE, RTC_RTSR);
-               }
-       }
-}
-
-static int puv3_rtc_remove(struct platform_device *dev)
-{
-       struct rtc_device *rtc = platform_get_drvdata(dev);
-
-       platform_set_drvdata(dev, NULL);
-       rtc_device_unregister(rtc);
-
-       puv3_rtc_setpie(&dev->dev, 0);
-       puv3_rtc_setaie(0);
-
-       release_resource(puv3_rtc_mem);
-       kfree(puv3_rtc_mem);
-
-       return 0;
-}
-
-static int puv3_rtc_probe(struct platform_device *pdev)
-{
-       struct rtc_device *rtc;
-       struct resource *res;
-       int ret;
-
-       pr_debug("%s: probe=%p\n", __func__, pdev);
-
-       /* find the IRQs */
-
-       puv3_rtc_tickno = platform_get_irq(pdev, 1);
-       if (puv3_rtc_tickno < 0) {
-               dev_err(&pdev->dev, "no irq for rtc tick\n");
-               return -ENOENT;
-       }
-
-       puv3_rtc_alarmno = platform_get_irq(pdev, 0);
-       if (puv3_rtc_alarmno < 0) {
-               dev_err(&pdev->dev, "no irq for alarm\n");
-               return -ENOENT;
-       }
-
-       pr_debug("PKUnity_rtc: tick irq %d, alarm irq %d\n",
-                puv3_rtc_tickno, puv3_rtc_alarmno);
-
-       /* get the memory region */
-
-       res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-       if (res == NULL) {
-               dev_err(&pdev->dev, "failed to get memory region resource\n");
-               return -ENOENT;
-       }
-
-       puv3_rtc_mem = request_mem_region(res->start,
-                                        res->end-res->start+1,
-                                        pdev->name);
-
-       if (puv3_rtc_mem == NULL) {
-               dev_err(&pdev->dev, "failed to reserve memory region\n");
-               ret = -ENOENT;
-               goto err_nores;
-       }
-
-       puv3_rtc_enable(pdev, 1);
-
-       /* register RTC and exit */
-
-       rtc = rtc_device_register("pkunity", &pdev->dev, &puv3_rtcops,
-                                 THIS_MODULE);
-
-       if (IS_ERR(rtc)) {
-               dev_err(&pdev->dev, "cannot attach rtc\n");
-               ret = PTR_ERR(rtc);
-               goto err_nortc;
-       }
-
-       /* platform setup code should have handled this; sigh */
-       if (!device_can_wakeup(&pdev->dev))
-               device_init_wakeup(&pdev->dev, 1);
-
-       platform_set_drvdata(pdev, rtc);
-       return 0;
-
- err_nortc:
-       puv3_rtc_enable(pdev, 0);
-       release_resource(puv3_rtc_mem);
-
- err_nores:
-       return ret;
-}
-
-#ifdef CONFIG_PM
-
-/* RTC Power management control */
-
-static int ticnt_save;
-
-static int puv3_rtc_suspend(struct platform_device *pdev, pm_message_t state)
-{
-       /* save RTAR for anyone using periodic interrupts */
-       ticnt_save = readl(RTC_RTAR);
-       puv3_rtc_enable(pdev, 0);
-       return 0;
-}
-
-static int puv3_rtc_resume(struct platform_device *pdev)
-{
-       puv3_rtc_enable(pdev, 1);
-       writel(ticnt_save, RTC_RTAR);
-       return 0;
-}
-#else
-#define puv3_rtc_suspend NULL
-#define puv3_rtc_resume  NULL
-#endif
-
-static struct platform_driver puv3_rtcdrv = {
-       .probe          = puv3_rtc_probe,
-       .remove         = __devexit_p(puv3_rtc_remove),
-       .suspend        = puv3_rtc_suspend,
-       .resume         = puv3_rtc_resume,
-       .driver         = {
-               .name   = "PKUnity-v3-RTC",
-               .owner  = THIS_MODULE,
-       }
-};
-
-static char __initdata banner[] = "PKUnity-v3 RTC, (c) 2009 PKUnity Co.\n";
-
-static int __init puv3_rtc_init(void)
-{
-       printk(banner);
-       return platform_driver_register(&puv3_rtcdrv);
-}
-
-static void __exit puv3_rtc_exit(void)
-{
-       platform_driver_unregister(&puv3_rtcdrv);
-}
-
-module_init(puv3_rtc_init);
-module_exit(puv3_rtc_exit);
-
-MODULE_DESCRIPTION("RTC Driver for the PKUnity v3 chip");
-MODULE_AUTHOR("Hu Dongliang");
-MODULE_LICENSE("GPL v2");
-
index f822e13dc04b43ca0902e273c6060f1f838fbfdb..ce2aabf5c550a2706bc39dd17ac2b1c5a94142e8 100644 (file)
@@ -1051,4 +1051,13 @@ config RTC_DRV_TILE
          Enable support for the Linux driver side of the Tilera
          hypervisor's real-time clock interface.
 
+config RTC_DRV_PUV3
+       tristate "PKUnity v3 RTC support"
+       depends on ARCH_PUV3
+       help
+         This enables support for the RTC in the PKUnity-v3 SoCs.
+
+         This drive can also be built as a module. If so, the module
+         will be called rtc-puv3.
+
 endif # RTC_CLASS
index 213d725f16d464cc0cc7527a2041f2d468d899f8..0ffefe877bfadca0fcf1730beaff016adc268ea2 100644 (file)
@@ -78,6 +78,7 @@ obj-$(CONFIG_RTC_DRV_PCF50633)        += rtc-pcf50633.o
 obj-$(CONFIG_RTC_DRV_PL030)    += rtc-pl030.o
 obj-$(CONFIG_RTC_DRV_PL031)    += rtc-pl031.o
 obj-$(CONFIG_RTC_DRV_PS3)      += rtc-ps3.o
+obj-$(CONFIG_RTC_DRV_PUV3)     += rtc-puv3.o
 obj-$(CONFIG_RTC_DRV_PXA)      += rtc-pxa.o
 obj-$(CONFIG_RTC_DRV_R9701)    += rtc-r9701.o
 obj-$(CONFIG_RTC_DRV_RP5C01)   += rtc-rp5c01.o
diff --git a/drivers/rtc/rtc-puv3.c b/drivers/rtc/rtc-puv3.c
new file mode 100644 (file)
index 0000000..46f14b8
--- /dev/null
@@ -0,0 +1,359 @@
+/*
+ * RTC driver code specific to PKUnity SoC and UniCore ISA
+ *
+ *     Maintained by GUAN Xue-tao <gxt@mprc.pku.edu.cn>
+ *     Copyright (C) 2001-2010 Guan Xuetao
+ *
+ * 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.
+ */
+
+#include <linux/module.h>
+#include <linux/fs.h>
+#include <linux/string.h>
+#include <linux/init.h>
+#include <linux/platform_device.h>
+#include <linux/interrupt.h>
+#include <linux/rtc.h>
+#include <linux/bcd.h>
+#include <linux/clk.h>
+#include <linux/log2.h>
+#include <linux/slab.h>
+#include <linux/uaccess.h>
+#include <linux/io.h>
+
+#include <asm/irq.h>
+#include <mach/hardware.h>
+
+static struct resource *puv3_rtc_mem;
+
+static int puv3_rtc_alarmno = IRQ_RTCAlarm;
+static int puv3_rtc_tickno  = IRQ_RTC;
+
+static DEFINE_SPINLOCK(puv3_rtc_pie_lock);
+
+/* IRQ Handlers */
+static irqreturn_t puv3_rtc_alarmirq(int irq, void *id)
+{
+       struct rtc_device *rdev = id;
+
+       writel(readl(RTC_RTSR) | RTC_RTSR_AL, RTC_RTSR);
+       rtc_update_irq(rdev, 1, RTC_AF | RTC_IRQF);
+       return IRQ_HANDLED;
+}
+
+static irqreturn_t puv3_rtc_tickirq(int irq, void *id)
+{
+       struct rtc_device *rdev = id;
+
+       writel(readl(RTC_RTSR) | RTC_RTSR_HZ, RTC_RTSR);
+       rtc_update_irq(rdev, 1, RTC_PF | RTC_IRQF);
+       return IRQ_HANDLED;
+}
+
+/* Update control registers */
+static void puv3_rtc_setaie(int to)
+{
+       unsigned int tmp;
+
+       pr_debug("%s: aie=%d\n", __func__, to);
+
+       tmp = readl(RTC_RTSR) & ~RTC_RTSR_ALE;
+
+       if (to)
+               tmp |= RTC_RTSR_ALE;
+
+       writel(tmp, RTC_RTSR);
+}
+
+static int puv3_rtc_setpie(struct device *dev, int enabled)
+{
+       unsigned int tmp;
+
+       pr_debug("%s: pie=%d\n", __func__, enabled);
+
+       spin_lock_irq(&puv3_rtc_pie_lock);
+       tmp = readl(RTC_RTSR) & ~RTC_RTSR_HZE;
+
+       if (enabled)
+               tmp |= RTC_RTSR_HZE;
+
+       writel(tmp, RTC_RTSR);
+       spin_unlock_irq(&puv3_rtc_pie_lock);
+
+       return 0;
+}
+
+/* Time read/write */
+static int puv3_rtc_gettime(struct device *dev, struct rtc_time *rtc_tm)
+{
+       rtc_time_to_tm(readl(RTC_RCNR), rtc_tm);
+
+       pr_debug("read time %02x.%02x.%02x %02x/%02x/%02x\n",
+                rtc_tm->tm_year, rtc_tm->tm_mon, rtc_tm->tm_mday,
+                rtc_tm->tm_hour, rtc_tm->tm_min, rtc_tm->tm_sec);
+
+       return 0;
+}
+
+static int puv3_rtc_settime(struct device *dev, struct rtc_time *tm)
+{
+       unsigned long rtc_count = 0;
+
+       pr_debug("set time %02d.%02d.%02d %02d/%02d/%02d\n",
+                tm->tm_year, tm->tm_mon, tm->tm_mday,
+                tm->tm_hour, tm->tm_min, tm->tm_sec);
+
+       rtc_tm_to_time(tm, &rtc_count);
+       writel(rtc_count, RTC_RCNR);
+
+       return 0;
+}
+
+static int puv3_rtc_getalarm(struct device *dev, struct rtc_wkalrm *alrm)
+{
+       struct rtc_time *alm_tm = &alrm->time;
+
+       rtc_time_to_tm(readl(RTC_RTAR), alm_tm);
+
+       alrm->enabled = readl(RTC_RTSR) & RTC_RTSR_ALE;
+
+       pr_debug("read alarm %02x %02x.%02x.%02x %02x/%02x/%02x\n",
+                alrm->enabled,
+                alm_tm->tm_year, alm_tm->tm_mon, alm_tm->tm_mday,
+                alm_tm->tm_hour, alm_tm->tm_min, alm_tm->tm_sec);
+
+       return 0;
+}
+
+static int puv3_rtc_setalarm(struct device *dev, struct rtc_wkalrm *alrm)
+{
+       struct rtc_time *tm = &alrm->time;
+       unsigned long rtcalarm_count = 0;
+
+       pr_debug("puv3_rtc_setalarm: %d, %02x/%02x/%02x %02x.%02x.%02x\n",
+                alrm->enabled,
+                tm->tm_mday & 0xff, tm->tm_mon & 0xff, tm->tm_year & 0xff,
+                tm->tm_hour & 0xff, tm->tm_min & 0xff, tm->tm_sec);
+
+       rtc_tm_to_time(tm, &rtcalarm_count);
+       writel(rtcalarm_count, RTC_RTAR);
+
+       puv3_rtc_setaie(alrm->enabled);
+
+       if (alrm->enabled)
+               enable_irq_wake(puv3_rtc_alarmno);
+       else
+               disable_irq_wake(puv3_rtc_alarmno);
+
+       return 0;
+}
+
+static int puv3_rtc_proc(struct device *dev, struct seq_file *seq)
+{
+       seq_printf(seq, "periodic_IRQ\t: %s\n",
+                    (readl(RTC_RTSR) & RTC_RTSR_HZE) ? "yes" : "no");
+       return 0;
+}
+
+static int puv3_rtc_open(struct device *dev)
+{
+       struct platform_device *pdev = to_platform_device(dev);
+       struct rtc_device *rtc_dev = platform_get_drvdata(pdev);
+       int ret;
+
+       ret = request_irq(puv3_rtc_alarmno, puv3_rtc_alarmirq,
+                         IRQF_DISABLED,  "pkunity-rtc alarm", rtc_dev);
+
+       if (ret) {
+               dev_err(dev, "IRQ%d error %d\n", puv3_rtc_alarmno, ret);
+               return ret;
+       }
+
+       ret = request_irq(puv3_rtc_tickno, puv3_rtc_tickirq,
+                         IRQF_DISABLED,  "pkunity-rtc tick", rtc_dev);
+
+       if (ret) {
+               dev_err(dev, "IRQ%d error %d\n", puv3_rtc_tickno, ret);
+               goto tick_err;
+       }
+
+       return ret;
+
+ tick_err:
+       free_irq(puv3_rtc_alarmno, rtc_dev);
+       return ret;
+}
+
+static void puv3_rtc_release(struct device *dev)
+{
+       struct platform_device *pdev = to_platform_device(dev);
+       struct rtc_device *rtc_dev = platform_get_drvdata(pdev);
+
+       /* do not clear AIE here, it may be needed for wake */
+       puv3_rtc_setpie(dev, 0);
+       free_irq(puv3_rtc_alarmno, rtc_dev);
+       free_irq(puv3_rtc_tickno, rtc_dev);
+}
+
+static const struct rtc_class_ops puv3_rtcops = {
+       .open           = puv3_rtc_open,
+       .release        = puv3_rtc_release,
+       .read_time      = puv3_rtc_gettime,
+       .set_time       = puv3_rtc_settime,
+       .read_alarm     = puv3_rtc_getalarm,
+       .set_alarm      = puv3_rtc_setalarm,
+       .proc           = puv3_rtc_proc,
+};
+
+static void puv3_rtc_enable(struct platform_device *pdev, int en)
+{
+       if (!en) {
+               writel(readl(RTC_RTSR) & ~RTC_RTSR_HZE, RTC_RTSR);
+       } else {
+               /* re-enable the device, and check it is ok */
+               if ((readl(RTC_RTSR) & RTC_RTSR_HZE) == 0) {
+                       dev_info(&pdev->dev, "rtc disabled, re-enabling\n");
+                       writel(readl(RTC_RTSR) | RTC_RTSR_HZE, RTC_RTSR);
+               }
+       }
+}
+
+static int puv3_rtc_remove(struct platform_device *dev)
+{
+       struct rtc_device *rtc = platform_get_drvdata(dev);
+
+       platform_set_drvdata(dev, NULL);
+       rtc_device_unregister(rtc);
+
+       puv3_rtc_setpie(&dev->dev, 0);
+       puv3_rtc_setaie(0);
+
+       release_resource(puv3_rtc_mem);
+       kfree(puv3_rtc_mem);
+
+       return 0;
+}
+
+static int puv3_rtc_probe(struct platform_device *pdev)
+{
+       struct rtc_device *rtc;
+       struct resource *res;
+       int ret;
+
+       pr_debug("%s: probe=%p\n", __func__, pdev);
+
+       /* find the IRQs */
+       puv3_rtc_tickno = platform_get_irq(pdev, 1);
+       if (puv3_rtc_tickno < 0) {
+               dev_err(&pdev->dev, "no irq for rtc tick\n");
+               return -ENOENT;
+       }
+
+       puv3_rtc_alarmno = platform_get_irq(pdev, 0);
+       if (puv3_rtc_alarmno < 0) {
+               dev_err(&pdev->dev, "no irq for alarm\n");
+               return -ENOENT;
+       }
+
+       pr_debug("PKUnity_rtc: tick irq %d, alarm irq %d\n",
+                puv3_rtc_tickno, puv3_rtc_alarmno);
+
+       /* get the memory region */
+       res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+       if (res == NULL) {
+               dev_err(&pdev->dev, "failed to get memory region resource\n");
+               return -ENOENT;
+       }
+
+       puv3_rtc_mem = request_mem_region(res->start,
+                                        res->end-res->start+1,
+                                        pdev->name);
+
+       if (puv3_rtc_mem == NULL) {
+               dev_err(&pdev->dev, "failed to reserve memory region\n");
+               ret = -ENOENT;
+               goto err_nores;
+       }
+
+       puv3_rtc_enable(pdev, 1);
+
+       /* register RTC and exit */
+       rtc = rtc_device_register("pkunity", &pdev->dev, &puv3_rtcops,
+                                 THIS_MODULE);
+
+       if (IS_ERR(rtc)) {
+               dev_err(&pdev->dev, "cannot attach rtc\n");
+               ret = PTR_ERR(rtc);
+               goto err_nortc;
+       }
+
+       /* platform setup code should have handled this; sigh */
+       if (!device_can_wakeup(&pdev->dev))
+               device_init_wakeup(&pdev->dev, 1);
+
+       platform_set_drvdata(pdev, rtc);
+       return 0;
+
+ err_nortc:
+       puv3_rtc_enable(pdev, 0);
+       release_resource(puv3_rtc_mem);
+
+ err_nores:
+       return ret;
+}
+
+#ifdef CONFIG_PM
+
+static int ticnt_save;
+
+static int puv3_rtc_suspend(struct platform_device *pdev, pm_message_t state)
+{
+       /* save RTAR for anyone using periodic interrupts */
+       ticnt_save = readl(RTC_RTAR);
+       puv3_rtc_enable(pdev, 0);
+       return 0;
+}
+
+static int puv3_rtc_resume(struct platform_device *pdev)
+{
+       puv3_rtc_enable(pdev, 1);
+       writel(ticnt_save, RTC_RTAR);
+       return 0;
+}
+#else
+#define puv3_rtc_suspend NULL
+#define puv3_rtc_resume  NULL
+#endif
+
+static struct platform_driver puv3_rtcdrv = {
+       .probe          = puv3_rtc_probe,
+       .remove         = __devexit_p(puv3_rtc_remove),
+       .suspend        = puv3_rtc_suspend,
+       .resume         = puv3_rtc_resume,
+       .driver         = {
+               .name   = "PKUnity-v3-RTC",
+               .owner  = THIS_MODULE,
+       }
+};
+
+static char __initdata banner[] = "PKUnity-v3 RTC, (c) 2009 PKUnity Co.\n";
+
+static int __init puv3_rtc_init(void)
+{
+       printk(banner);
+       return platform_driver_register(&puv3_rtcdrv);
+}
+
+static void __exit puv3_rtc_exit(void)
+{
+       platform_driver_unregister(&puv3_rtcdrv);
+}
+
+module_init(puv3_rtc_init);
+module_exit(puv3_rtc_exit);
+
+MODULE_DESCRIPTION("RTC Driver for the PKUnity v3 chip");
+MODULE_AUTHOR("Hu Dongliang");
+MODULE_LICENSE("GPL v2");