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Commit 4402be2b authored by Corentin Labbe's avatar Corentin Labbe Committed by Alexandre Belloni
Browse files

rtc: remove rtc-at32ap700x 



Since PLATFORM_AT32AP is an AVR32 platform which was removed, the
rtc driver rtc-at32ap700x is useless.
This patch remove it.

Signed-off-by: default avatarCorentin Labbe <clabbe.montjoie@gmail.com>
Acked-by: default avatarHans-Christian Noren Egtvedt <egtvedt@samfundet.no>
Signed-off-by: default avatarAlexandre Belloni <alexandre.belloni@free-electrons.com>
parent 796c0ad7

drivers/rtc/Kconfig

+0 −7
Original line number Diff line number Diff line
@@ -1402,13 +1402,6 @@ config RTC_DRV_PL031 
	  To compile this driver as a module, choose M here: the

	  module will be called rtc-pl031.



config RTC_DRV_AT32AP700X

	tristate "AT32AP700X series RTC"

	depends on PLATFORM_AT32AP || COMPILE_TEST

	help

	  Driver for the internal RTC (Realtime Clock) on Atmel AVR32

	  AT32AP700x family processors.



config RTC_DRV_AT91RM9200

	tristate "AT91RM9200 or some AT91SAM9 RTC"

	depends on ARCH_AT91 || COMPILE_TEST

drivers/rtc/Makefile

+0 −1
Original line number Diff line number Diff line
@@ -33,7 +33,6 @@ obj-$(CONFIG_RTC_DRV_AC100) += rtc-ac100.o 
obj-$(CONFIG_RTC_DRV_ARMADA38X)	+= rtc-armada38x.o

obj-$(CONFIG_RTC_DRV_AS3722)	+= rtc-as3722.o

obj-$(CONFIG_RTC_DRV_ASM9260)	+= rtc-asm9260.o

obj-$(CONFIG_RTC_DRV_AT32AP700X)+= rtc-at32ap700x.o

obj-$(CONFIG_RTC_DRV_AT91RM9200)+= rtc-at91rm9200.o

obj-$(CONFIG_RTC_DRV_AT91SAM9)	+= rtc-at91sam9.o

obj-$(CONFIG_RTC_DRV_AU1XXX)	+= rtc-au1xxx.o

drivers/rtc/rtc-at32ap700x.c

deleted100644 → 0
+0 −287
Original line number Diff line number Diff line 
/*

 * An RTC driver for the AVR32 AT32AP700x processor series.

 *

 * Copyright (C) 2007 Atmel Corporation

 *

 * 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/platform_device.h>

#include <linux/slab.h>

#include <linux/rtc.h>

#include <linux/io.h>



/*

 * This is a bare-bones RTC. It runs during most system sleep states, but has

 * no battery backup and gets reset during system restart.  It must be

 * initialized from an external clock (network, I2C, etc) before it can be of

 * much use.

 *

 * The alarm functionality is limited by the hardware, not supporting

 * periodic interrupts.

 */



#define RTC_CTRL		0x00

#define RTC_CTRL_EN		   0

#define RTC_CTRL_PCLR		   1

#define RTC_CTRL_TOPEN		   2

#define RTC_CTRL_PSEL		   8



#define RTC_VAL			0x04



#define RTC_TOP			0x08



#define RTC_IER			0x10

#define RTC_IER_TOPI		   0



#define RTC_IDR			0x14

#define RTC_IDR_TOPI		   0



#define RTC_IMR			0x18

#define RTC_IMR_TOPI		   0



#define RTC_ISR			0x1c

#define RTC_ISR_TOPI		   0



#define RTC_ICR			0x20

#define RTC_ICR_TOPI		   0



#define RTC_BIT(name)		(1 << RTC_##name)

#define RTC_BF(name, value)	((value) << RTC_##name)



#define rtc_readl(dev, reg)				\

	__raw_readl((dev)->regs + RTC_##reg)

#define rtc_writel(dev, reg, value)			\

	__raw_writel((value), (dev)->regs + RTC_##reg)



struct rtc_at32ap700x {

	struct rtc_device	*rtc;

	void __iomem		*regs;

	unsigned long		alarm_time;

	unsigned long		irq;

	/* Protect against concurrent register access. */

	spinlock_t		lock;

};



static int at32_rtc_readtime(struct device *dev, struct rtc_time *tm)

{

	struct rtc_at32ap700x *rtc = dev_get_drvdata(dev);

	unsigned long now;



	now = rtc_readl(rtc, VAL);

	rtc_time_to_tm(now, tm);



	return 0;

}



static int at32_rtc_settime(struct device *dev, struct rtc_time *tm)

{

	struct rtc_at32ap700x *rtc = dev_get_drvdata(dev);

	unsigned long now;

	int ret;



	ret = rtc_tm_to_time(tm, &now);

	if (ret == 0)

		rtc_writel(rtc, VAL, now);



	return ret;

}



static int at32_rtc_readalarm(struct device *dev, struct rtc_wkalrm *alrm)

{

	struct rtc_at32ap700x *rtc = dev_get_drvdata(dev);



	spin_lock_irq(&rtc->lock);

	rtc_time_to_tm(rtc->alarm_time, &alrm->time);

	alrm->enabled = rtc_readl(rtc, IMR) & RTC_BIT(IMR_TOPI) ? 1 : 0;

	alrm->pending = rtc_readl(rtc, ISR) & RTC_BIT(ISR_TOPI) ? 1 : 0;

	spin_unlock_irq(&rtc->lock);



	return 0;

}



static int at32_rtc_setalarm(struct device *dev, struct rtc_wkalrm *alrm)

{

	struct rtc_at32ap700x *rtc = dev_get_drvdata(dev);

	unsigned long rtc_unix_time;

	unsigned long alarm_unix_time;

	int ret;



	rtc_unix_time = rtc_readl(rtc, VAL);



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

	if (ret)

		return ret;



	if (alarm_unix_time < rtc_unix_time)

		return -EINVAL;



	spin_lock_irq(&rtc->lock);

	rtc->alarm_time = alarm_unix_time;

	rtc_writel(rtc, TOP, rtc->alarm_time);

	if (alrm->enabled)

		rtc_writel(rtc, CTRL, rtc_readl(rtc, CTRL)

				| RTC_BIT(CTRL_TOPEN));

	else

		rtc_writel(rtc, CTRL, rtc_readl(rtc, CTRL)

				& ~RTC_BIT(CTRL_TOPEN));

	spin_unlock_irq(&rtc->lock);



	return ret;

}



static int at32_rtc_alarm_irq_enable(struct device *dev, unsigned int enabled)

{

	struct rtc_at32ap700x *rtc = dev_get_drvdata(dev);

	int ret = 0;



	spin_lock_irq(&rtc->lock);



	if (enabled) {

		if (rtc_readl(rtc, VAL) > rtc->alarm_time) {

			ret = -EINVAL;

			goto out;

		}

		rtc_writel(rtc, CTRL, rtc_readl(rtc, CTRL)

				| RTC_BIT(CTRL_TOPEN));

		rtc_writel(rtc, ICR, RTC_BIT(ICR_TOPI));

		rtc_writel(rtc, IER, RTC_BIT(IER_TOPI));

	} else {

		rtc_writel(rtc, CTRL, rtc_readl(rtc, CTRL)

				& ~RTC_BIT(CTRL_TOPEN));

		rtc_writel(rtc, IDR, RTC_BIT(IDR_TOPI));

		rtc_writel(rtc, ICR, RTC_BIT(ICR_TOPI));

	}

out:

	spin_unlock_irq(&rtc->lock);



	return ret;

}



static irqreturn_t at32_rtc_interrupt(int irq, void *dev_id)

{

	struct rtc_at32ap700x *rtc = (struct rtc_at32ap700x *)dev_id;

	unsigned long isr = rtc_readl(rtc, ISR);

	unsigned long events = 0;

	int ret = IRQ_NONE;



	spin_lock(&rtc->lock);



	if (isr & RTC_BIT(ISR_TOPI)) {

		rtc_writel(rtc, ICR, RTC_BIT(ICR_TOPI));

		rtc_writel(rtc, IDR, RTC_BIT(IDR_TOPI));

		rtc_writel(rtc, CTRL, rtc_readl(rtc, CTRL)

				& ~RTC_BIT(CTRL_TOPEN));

		rtc_writel(rtc, VAL, rtc->alarm_time);

		events = RTC_AF | RTC_IRQF;

		rtc_update_irq(rtc->rtc, 1, events);

		ret = IRQ_HANDLED;

	}



	spin_unlock(&rtc->lock);



	return ret;

}



static const struct rtc_class_ops at32_rtc_ops = {

	.read_time	= at32_rtc_readtime,

	.set_time	= at32_rtc_settime,

	.read_alarm	= at32_rtc_readalarm,

	.set_alarm	= at32_rtc_setalarm,

	.alarm_irq_enable = at32_rtc_alarm_irq_enable,

};



static int __init at32_rtc_probe(struct platform_device *pdev)

{

	struct resource	*regs;

	struct rtc_at32ap700x *rtc;

	int irq;

	int ret;



	rtc = devm_kzalloc(&pdev->dev, sizeof(struct rtc_at32ap700x),

			   GFP_KERNEL);

	if (!rtc)

		return -ENOMEM;



	regs = platform_get_resource(pdev, IORESOURCE_MEM, 0);

	if (!regs) {

		dev_dbg(&pdev->dev, "no mmio resource defined\n");

		return -ENXIO;

	}



	irq = platform_get_irq(pdev, 0);

	if (irq <= 0) {

		dev_dbg(&pdev->dev, "could not get irq\n");

		return -ENXIO;

	}



	rtc->irq = irq;

	rtc->regs = devm_ioremap(&pdev->dev, regs->start, resource_size(regs));

	if (!rtc->regs) {

		dev_dbg(&pdev->dev, "could not map I/O memory\n");

		return -ENOMEM;

	}

	spin_lock_init(&rtc->lock);



	/*

	 * Maybe init RTC: count from zero at 1 Hz, disable wrap irq.

	 *

	 * Do not reset VAL register, as it can hold an old time

	 * from last JTAG reset.

	 */

	if (!(rtc_readl(rtc, CTRL) & RTC_BIT(CTRL_EN))) {

		rtc_writel(rtc, CTRL, RTC_BIT(CTRL_PCLR));

		rtc_writel(rtc, IDR, RTC_BIT(IDR_TOPI));

		rtc_writel(rtc, CTRL, RTC_BF(CTRL_PSEL, 0xe)

				| RTC_BIT(CTRL_EN));

	}



	ret = devm_request_irq(&pdev->dev, irq, at32_rtc_interrupt, IRQF_SHARED,

				"rtc", rtc);

	if (ret) {

		dev_dbg(&pdev->dev, "could not request irq %d\n", irq);

		return ret;

	}



	platform_set_drvdata(pdev, rtc);



	rtc->rtc = devm_rtc_device_register(&pdev->dev, pdev->name,

				&at32_rtc_ops, THIS_MODULE);

	if (IS_ERR(rtc->rtc)) {

		dev_dbg(&pdev->dev, "could not register rtc device\n");

		return PTR_ERR(rtc->rtc);

	}



	device_init_wakeup(&pdev->dev, 1);



	dev_info(&pdev->dev, "Atmel RTC for AT32AP700x at %08lx irq %ld\n",

			(unsigned long)rtc->regs, rtc->irq);



	return 0;

}



static int __exit at32_rtc_remove(struct platform_device *pdev)

{

	device_init_wakeup(&pdev->dev, 0);



	return 0;

}



MODULE_ALIAS("platform:at32ap700x_rtc");



static struct platform_driver at32_rtc_driver = {

	.remove		= __exit_p(at32_rtc_remove),

	.driver		= {

		.name	= "at32ap700x_rtc",

	},

};



module_platform_driver_probe(at32_rtc_driver, at32_rtc_probe);



MODULE_AUTHOR("Hans-Christian Egtvedt <egtvedt@samfundet.no>");

MODULE_DESCRIPTION("Real time clock for AVR32 AT32AP700x");

MODULE_LICENSE("GPL");