From 2809e80b8a73d556b2302e273966fb15db16c51e Mon Sep 17 00:00:00 2001 From: Guan Xuetao Date: Thu, 26 May 2011 16:43:27 +0800 Subject: unicore32: move rtc-puv3.c to drivers/rtc directory 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 Acked-by: Arnd Bergmann diff --git a/MAINTAINERS b/MAINTAINERS index b5ea4d0..bbe49d8 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -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 diff --git a/arch/unicore32/Kconfig b/arch/unicore32/Kconfig index d3a3032..e57dcce 100644 --- a/arch/unicore32/Kconfig +++ b/arch/unicore32/Kconfig @@ -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" diff --git a/arch/unicore32/configs/debug_defconfig b/arch/unicore32/configs/debug_defconfig index b5fbde9..9b9c251 100644 --- a/arch/unicore32/configs/debug_defconfig +++ b/arch/unicore32/configs/debug_defconfig @@ -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 diff --git a/arch/unicore32/kernel/Makefile b/arch/unicore32/kernel/Makefile index ec23a2f..aeb0f18 100644 --- a/arch/unicore32/kernel/Makefile +++ b/arch/unicore32/kernel/Makefile @@ -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 index 8cad70b..0000000 --- a/arch/unicore32/kernel/rtc.c +++ /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 - * 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 -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include - -#include -#include - -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"); - diff --git a/drivers/rtc/Kconfig b/drivers/rtc/Kconfig index f822e13..ce2aabf 100644 --- a/drivers/rtc/Kconfig +++ b/drivers/rtc/Kconfig @@ -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 diff --git a/drivers/rtc/Makefile b/drivers/rtc/Makefile index 213d725..0ffefe8 100644 --- a/drivers/rtc/Makefile +++ b/drivers/rtc/Makefile @@ -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 index 0000000..46f14b8 --- /dev/null +++ b/drivers/rtc/rtc-puv3.c @@ -0,0 +1,359 @@ +/* + * RTC driver code specific to PKUnity SoC and UniCore ISA + * + * Maintained by GUAN Xue-tao + * 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 +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include +#include + +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"); -- cgit v0.10.2