Commit 3888c090 authored by Haojian Zhuang's avatar Haojian Zhuang
Browse files

rtc: sa1100: declare irq in resource 



Avoid to hard coded irq in rtc-sa1100 driver since we could share
it among arch-sa1100/arch-pxa/arch-mmp.

We still keep hard coded register address since the requirement is
enabling both rtc-sa1100 and rtc-pxa driver. The register addresses
are conflict since they're only two wrappers on the same rtc device.

Signed-off-by: default avatarHaojian Zhuang <haojian.zhuang@marvell.com>
Reviewed-by: default avatarArnd Bergmann <arnd@arndb.de>
parent 1d8c38c3

arch/arm/mach-pxa/devices.c

+23 −5
Original line number Diff line number Diff line
@@ -406,20 +406,17 @@ static struct resource pxa_rtc_resources[] = { 
	[1] = {

		.start  = IRQ_RTC1Hz,

		.end    = IRQ_RTC1Hz,

		.name	= "rtc 1Hz",

		.flags  = IORESOURCE_IRQ,

	},

	[2] = {

		.start  = IRQ_RTCAlrm,

		.end    = IRQ_RTCAlrm,

		.name	= "rtc alarm",

		.flags  = IORESOURCE_IRQ,

	},

};



struct platform_device sa1100_device_rtc = {

	.name		= "sa1100-rtc",

	.id		= -1,

};



struct platform_device pxa_device_rtc = {

	.name		= "pxa-rtc",

	.id		= -1,
@@ -427,6 +424,27 @@ struct platform_device pxa_device_rtc = { 
	.resource       = pxa_rtc_resources,

};



static struct resource sa1100_rtc_resources[] = {

	{

		.start  = IRQ_RTC1Hz,

		.end    = IRQ_RTC1Hz,

		.name	= "rtc 1Hz",

		.flags  = IORESOURCE_IRQ,

	}, {

		.start  = IRQ_RTCAlrm,

		.end    = IRQ_RTCAlrm,

		.name	= "rtc alarm",

		.flags  = IORESOURCE_IRQ,

	},

};



struct platform_device sa1100_device_rtc = {

	.name		= "sa1100-rtc",

	.id		= -1,

	.num_resources	= ARRAY_SIZE(sa1100_rtc_resources),

	.resource	= sa1100_rtc_resources,

};



static struct resource pxa_ac97_resources[] = {

	[0] = {

		.start  = 0x40500000,

arch/arm/mach-sa1100/generic.c

+8 −0
Original line number Diff line number Diff line
@@ -345,9 +345,17 @@ void sa11x0_register_irda(struct irda_platform_data *irda) 
	sa11x0_register_device(&sa11x0ir_device, irda);

}



static struct resource sa1100_rtc_resources[] = {

	DEFINE_RES_MEM(0x90010000, 0x9001003f),

	DEFINE_RES_IRQ_NAMED(IRQ_RTC1Hz, "rtc 1Hz"),

	DEFINE_RES_IRQ_NAMED(IRQ_RTCAlrm, "rtc alarm"),

};



static struct platform_device sa11x0rtc_device = {

	.name		= "sa1100-rtc",

	.id		= -1,

	.num_resources	= ARRAY_SIZE(sa1100_rtc_resources),

	.resource	= sa1100_rtc_resources,

};



static struct platform_device *sa11x0_devices[] __initdata = {

drivers/rtc/Kconfig

+2 −2
Original line number Diff line number Diff line
@@ -773,8 +773,8 @@ config RTC_DRV_EP93XX 
	  will be called rtc-ep93xx.



config RTC_DRV_SA1100

	tristate "SA11x0/PXA2xx"

	depends on ARCH_SA1100 || ARCH_PXA

	tristate "SA11x0/PXA2xx/PXA910"

	depends on ARCH_SA1100 || ARCH_PXA || ARCH_MMP

	help

	  If you say Y here you will get access to the real time clock

	  built into your SA11x0 or PXA2xx CPU.

drivers/rtc/rtc-sa1100.c

+67 −31
Original line number Diff line number Diff line
@@ -27,6 +27,7 @@ 
#include <linux/init.h>

#include <linux/fs.h>

#include <linux/interrupt.h>

#include <linux/slab.h>

#include <linux/string.h>

#include <linux/pm.h>

#include <linux/bitops.h>
@@ -34,24 +35,29 @@ 
#include <mach/hardware.h>

#include <asm/irq.h>



#ifdef CONFIG_ARCH_PXA

#if defined(CONFIG_ARCH_PXA) || defined(CONFIG_ARCH_MMP)

#include <mach/regs-rtc.h>

#endif



#define RTC_DEF_DIVIDER		(32768 - 1)

#define RTC_DEF_TRIM		0

#define RTC_FREQ		1024



static const unsigned long RTC_FREQ = 1024;

static DEFINE_SPINLOCK(sa1100_rtc_lock);

struct sa1100_rtc {

	spinlock_t		lock;

	int			irq_1hz;

	int			irq_alarm;

	struct rtc_device	*rtc;

};



static irqreturn_t sa1100_rtc_interrupt(int irq, void *dev_id)

{

	struct platform_device *pdev = to_platform_device(dev_id);

	struct rtc_device *rtc = platform_get_drvdata(pdev);

	struct sa1100_rtc *info = dev_get_drvdata(dev_id);

	struct rtc_device *rtc = info->rtc;

	unsigned int rtsr;

	unsigned long events = 0;



	spin_lock(&sa1100_rtc_lock);

	spin_lock(&info->lock);



	rtsr = RTSR;

	/* clear interrupt sources */
@@ -87,27 +93,27 @@ static irqreturn_t sa1100_rtc_interrupt(int irq, void *dev_id) 


	rtc_update_irq(rtc, 1, events);



	spin_unlock(&sa1100_rtc_lock);

	spin_unlock(&info->lock);



	return IRQ_HANDLED;

}



static int sa1100_rtc_open(struct device *dev)

{

	struct sa1100_rtc *info = dev_get_drvdata(dev);

	struct rtc_device *rtc = info->rtc;

	int ret;

	struct platform_device *plat_dev = to_platform_device(dev);

	struct rtc_device *rtc = platform_get_drvdata(plat_dev);



	ret = request_irq(IRQ_RTC1Hz, sa1100_rtc_interrupt, IRQF_DISABLED,

	ret = request_irq(info->irq_1hz, sa1100_rtc_interrupt, IRQF_DISABLED,

		"rtc 1Hz", dev);

	if (ret) {

		dev_err(dev, "IRQ %d already in use.\n", IRQ_RTC1Hz);

		dev_err(dev, "IRQ %d already in use.\n", info->irq_1hz);

		goto fail_ui;

	}

	ret = request_irq(IRQ_RTCAlrm, sa1100_rtc_interrupt, IRQF_DISABLED,

	ret = request_irq(info->irq_alarm, sa1100_rtc_interrupt, IRQF_DISABLED,

		"rtc Alrm", dev);

	if (ret) {

		dev_err(dev, "IRQ %d already in use.\n", IRQ_RTCAlrm);

		dev_err(dev, "IRQ %d already in use.\n", info->irq_alarm);

		goto fail_ai;

	}

	rtc->max_user_freq = RTC_FREQ;
@@ -116,29 +122,33 @@ static int sa1100_rtc_open(struct device *dev) 
	return 0;



 fail_ai:

	free_irq(IRQ_RTC1Hz, dev);

	free_irq(info->irq_1hz, dev);

 fail_ui:

	return ret;

}



static void sa1100_rtc_release(struct device *dev)

{

	spin_lock_irq(&sa1100_rtc_lock);

	struct sa1100_rtc *info = dev_get_drvdata(dev);



	spin_lock_irq(&info->lock);

	RTSR = 0;

	spin_unlock_irq(&sa1100_rtc_lock);

	spin_unlock_irq(&info->lock);



	free_irq(IRQ_RTCAlrm, dev);

	free_irq(IRQ_RTC1Hz, dev);

	free_irq(info->irq_alarm, dev);

	free_irq(info->irq_1hz, dev);

}



static int sa1100_rtc_alarm_irq_enable(struct device *dev, unsigned int enabled)

{

	spin_lock_irq(&sa1100_rtc_lock);

	struct sa1100_rtc *info = dev_get_drvdata(dev);



	spin_lock_irq(&info->lock);

	if (enabled)

		RTSR |= RTSR_ALE;

	else

		RTSR &= ~RTSR_ALE;

	spin_unlock_irq(&sa1100_rtc_lock);

	spin_unlock_irq(&info->lock);

	return 0;

}
@@ -171,10 +181,11 @@ static int sa1100_rtc_read_alarm(struct device *dev, struct rtc_wkalrm *alrm) 


static int sa1100_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *alrm)

{

	struct sa1100_rtc *info = dev_get_drvdata(dev);

	unsigned long time;

	int ret;



	spin_lock_irq(&sa1100_rtc_lock);

	spin_lock_irq(&info->lock);

	ret = rtc_tm_to_time(&alrm->time, &time);

	if (ret != 0)

		goto out;
@@ -185,7 +196,7 @@ static int sa1100_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *alrm) 
	else

		RTSR &= ~RTSR_ALE;

out:

	spin_unlock_irq(&sa1100_rtc_lock);

	spin_unlock_irq(&info->lock);



	return ret;

}
@@ -212,6 +223,21 @@ static const struct rtc_class_ops sa1100_rtc_ops = { 
static int sa1100_rtc_probe(struct platform_device *pdev)

{

	struct rtc_device *rtc;

	struct sa1100_rtc *info;

	int irq_1hz, irq_alarm, ret = 0;



	irq_1hz = platform_get_irq_byname(pdev, "rtc 1Hz");

	irq_alarm = platform_get_irq_byname(pdev, "rtc alarm");

	if (irq_1hz < 0 || irq_alarm < 0)

		return -ENODEV;



	info = kzalloc(sizeof(struct sa1100_rtc), GFP_KERNEL);

	if (!info)

		return -ENOMEM;

	info->irq_1hz = irq_1hz;

	info->irq_alarm = irq_alarm;

	spin_lock_init(&info->lock);

	platform_set_drvdata(pdev, info);



	/*

	 * According to the manual we should be able to let RTTR be zero
@@ -233,10 +259,11 @@ static int sa1100_rtc_probe(struct platform_device *pdev) 
	rtc = rtc_device_register(pdev->name, &pdev->dev, &sa1100_rtc_ops,

		THIS_MODULE);



	if (IS_ERR(rtc))

		return PTR_ERR(rtc);



	platform_set_drvdata(pdev, rtc);

	if (IS_ERR(rtc)) {

		ret = PTR_ERR(rtc);

		goto err_dev;

	}

	info->rtc = rtc;



	/* Fix for a nasty initialization problem the in SA11xx RTSR register.

	 * See also the comments in sa1100_rtc_interrupt().
@@ -263,14 +290,21 @@ static int sa1100_rtc_probe(struct platform_device *pdev) 
	RTSR = RTSR_AL | RTSR_HZ;



	return 0;

err_dev:

	platform_set_drvdata(pdev, NULL);

	kfree(info);

	return ret;

}



static int sa1100_rtc_remove(struct platform_device *pdev)

{

	struct rtc_device *rtc = platform_get_drvdata(pdev);

	struct sa1100_rtc *info = platform_get_drvdata(pdev);



	if (rtc)

		rtc_device_unregister(rtc);

	if (info) {

		rtc_device_unregister(info->rtc);

		platform_set_drvdata(pdev, NULL);

		kfree(info);

	}



	return 0;

}
@@ -278,15 +312,17 @@ static int sa1100_rtc_remove(struct platform_device *pdev) 
#ifdef CONFIG_PM

static int sa1100_rtc_suspend(struct device *dev)

{

	struct sa1100_rtc *info = dev_get_drvdata(dev);

	if (device_may_wakeup(dev))

		enable_irq_wake(IRQ_RTCAlrm);

		enable_irq_wake(info->irq_alarm);

	return 0;

}



static int sa1100_rtc_resume(struct device *dev)

{

	struct sa1100_rtc *info = dev_get_drvdata(dev);

	if (device_may_wakeup(dev))

		disable_irq_wake(IRQ_RTCAlrm);

		disable_irq_wake(info->irq_alarm);

	return 0;

}

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