[RTC] rtc-pl030: add driver, remove old non-rtc lib driver

Convert Integrator PL030 RTC driver to use the RTC class interfaces.

Acked-by: Alessandro Zummo <a.zummo@towertech.it>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

2 files changed, 1 insertions, 224 deletions

diff --git a/arch/arm/mach-integrator/Makefile b/arch/arm/mach-integrator/Makefile
index 158daaf9e3b0..6a5ef8d30b10 100644
--- a/arch/arm/mach-integrator/Makefile
+++ b/arch/arm/mach-integrator/Makefile
@@ -4,7 +4,7 @@
 
 # Object file lists.
 
-obj-y					:= clock.o core.o lm.o time.o
+obj-y					:= clock.o core.o lm.o
 obj-$(CONFIG_ARCH_INTEGRATOR_AP)	+= integrator_ap.o
 obj-$(CONFIG_ARCH_INTEGRATOR_CP)	+= integrator_cp.o
 
diff --git a/arch/arm/mach-integrator/time.c b/arch/arm/mach-integrator/time.c
deleted file mode 100644
index 8508a0db3eaf..000000000000
--- a/arch/arm/mach-integrator/time.c
+++ /dev/null
@@ -1,223 +0,0 @@
-/*
- *  linux/arch/arm/mach-integrator/time.c
- *
- *  Copyright (C) 2000-2001 Deep Blue Solutions Ltd.
- *
- * 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/kernel.h>
-#include <linux/time.h>
-#include <linux/mc146818rtc.h>
-#include <linux/interrupt.h>
-#include <linux/init.h>
-#include <linux/device.h>
-#include <linux/amba/bus.h>
-
-#include <asm/hardware.h>
-#include <asm/io.h>
-#include <asm/uaccess.h>
-#include <asm/rtc.h>
-
-#include <asm/mach/time.h>
-
-#define RTC_DR		(0)
-#define RTC_MR		(4)
-#define RTC_STAT	(8)
-#define RTC_EOI		(8)
-#define RTC_LR		(12)
-#define RTC_CR		(16)
-#define RTC_CR_MIE	(1 << 0)
-
-extern int (*set_rtc)(void);
-static void __iomem *rtc_base;
-
-static int integrator_set_rtc(void)
-{
-	__raw_writel(xtime.tv_sec, rtc_base + RTC_LR);
-	return 1;
-}
-
-static int integrator_rtc_read_alarm(struct rtc_wkalrm *alrm)
-{
-	rtc_time_to_tm(readl(rtc_base + RTC_MR), &alrm->time);
-	return 0;
-}
-
-static inline int integrator_rtc_set_alarm(struct rtc_wkalrm *alrm)
-{
-	unsigned long time;
-	int ret;
-
-	/*
-	 * At the moment, we can only deal with non-wildcarded alarm times.
-	 */
-	ret = rtc_valid_tm(&alrm->time);
-	if (ret == 0)
-		ret = rtc_tm_to_time(&alrm->time, &time);
-	if (ret == 0)
-		writel(time, rtc_base + RTC_MR);
-	return ret;
-}
-
-static int integrator_rtc_read_time(struct rtc_time *tm)
-{
-	rtc_time_to_tm(readl(rtc_base + RTC_DR), tm);
-	return 0;
-}
-
-/*
- * Set the RTC time.  Unfortunately, we can't accurately set
- * the point at which the counter updates.
- *
- * Also, since RTC_LR is transferred to RTC_CR on next rising
- * edge of the 1Hz clock, we must write the time one second
- * in advance.
- */
-static inline int integrator_rtc_set_time(struct rtc_time *tm)
-{
-	unsigned long time;
-	int ret;
-
-	ret = rtc_tm_to_time(tm, &time);
-	if (ret == 0)
-		writel(time + 1, rtc_base + RTC_LR);
-
-	return ret;
-}
-
-static struct rtc_ops rtc_ops = {
-	.owner		= THIS_MODULE,
-	.read_time	= integrator_rtc_read_time,
-	.set_time	= integrator_rtc_set_time,
-	.read_alarm	= integrator_rtc_read_alarm,
-	.set_alarm	= integrator_rtc_set_alarm,
-};
-
-static irqreturn_t arm_rtc_interrupt(int irq, void *dev_id)
-{
-	writel(0, rtc_base + RTC_EOI);
-	return IRQ_HANDLED;
-}
-
-static int rtc_probe(struct amba_device *dev, void *id)
-{
-	int ret;
-
-	if (rtc_base)
-		return -EBUSY;
-
-	ret = amba_request_regions(dev, NULL);
-	if (ret)
-		goto out;
-
-	rtc_base = ioremap(dev->res.start, SZ_4K);
-	if (!rtc_base) {
-		ret = -ENOMEM;
-		goto res_out;
-	}
-
-	__raw_writel(0, rtc_base + RTC_CR);
-	__raw_writel(0, rtc_base + RTC_EOI);
-
-	xtime.tv_sec = __raw_readl(rtc_base + RTC_DR);
-
-	/* note that 'dev' is merely used for irq disambiguation;
-	 * it is not actually referenced in the irq handler
-	 */
-	ret = request_irq(dev->irq[0], arm_rtc_interrupt, IRQF_DISABLED,
-			  "rtc-pl030", dev);
-	if (ret)
-		goto map_out;
-
-	ret = register_rtc(&rtc_ops);
-	if (ret)
-		goto irq_out;
-
-	set_rtc = integrator_set_rtc;
-	return 0;
-
- irq_out:
-	free_irq(dev->irq[0], dev);
- map_out:
-	iounmap(rtc_base);
-	rtc_base = NULL;
- res_out:
-	amba_release_regions(dev);
- out:
-	return ret;
-}
-
-static int rtc_remove(struct amba_device *dev)
-{
-	set_rtc = NULL;
-
-	writel(0, rtc_base + RTC_CR);
-
-	free_irq(dev->irq[0], dev);
-	unregister_rtc(&rtc_ops);
-
-	iounmap(rtc_base);
-	rtc_base = NULL;
-	amba_release_regions(dev);
-
-	return 0;
-}
-
-static struct timespec rtc_delta;
-
-static int rtc_suspend(struct amba_device *dev, pm_message_t state)
-{
-	struct timespec rtc;
-
-	rtc.tv_sec = readl(rtc_base + RTC_DR);
-	rtc.tv_nsec = 0;
-	save_time_delta(&rtc_delta, &rtc);
-
-	return 0;
-}
-
-static int rtc_resume(struct amba_device *dev)
-{
-	struct timespec rtc;
-
-	rtc.tv_sec = readl(rtc_base + RTC_DR);
-	rtc.tv_nsec = 0;
-	restore_time_delta(&rtc_delta, &rtc);
-
-	return 0;
-}
-
-static struct amba_id rtc_ids[] = {
-	{
-		.id	= 0x00041030,
-		.mask	= 0x000fffff,
-	},
-	{ 0, 0 },
-};
-
-static struct amba_driver rtc_driver = {
-	.drv		= {
-		.name	= "rtc-pl030",
-	},
-	.probe		= rtc_probe,
-	.remove		= rtc_remove,
-	.suspend	= rtc_suspend,
-	.resume		= rtc_resume,
-	.id_table	= rtc_ids,
-};
-
-static int __init integrator_rtc_init(void)
-{
-	return amba_driver_register(&rtc_driver);
-}
-
-static void __exit integrator_rtc_exit(void)
-{
-	amba_driver_unregister(&rtc_driver);
-}
-
-module_init(integrator_rtc_init);
-module_exit(integrator_rtc_exit);