Commit 2a692245 authored by Thomas Bogendoerfer's avatar Thomas Bogendoerfer Committed by Alexandre Belloni
Browse files

rtc: vr41xx: remove driver 



Commit d3164e2f ("MIPS: Remove VR41xx support") removed support
for MIPS VR41xx platform, so remove exclusive drivers for this
platform, too.

Signed-off-by: default avatarThomas Bogendoerfer <tsbogend@alpha.franken.de>
Signed-off-by: default avatarAlexandre Belloni <alexandre.belloni@bootlin.com>
Link: https://lore.kernel.org/r/20220715135330.134684-1-tsbogend@alpha.franken.de
parent 03d7a732

drivers/rtc/Kconfig

+0 −10
Original line number Diff line number Diff line
@@ -1478,16 +1478,6 @@ config RTC_DRV_SUNPLUS 
	  This driver can also be built as a module. If so, the module

	  will be called rtc-sunplus.



config RTC_DRV_VR41XX

	tristate "NEC VR41XX"

	depends on CPU_VR41XX || COMPILE_TEST

	help

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

	  built into your NEC VR41XX CPU.



	  To compile this driver as a module, choose M here: the

	  module will be called rtc-vr41xx.



config RTC_DRV_PL030

	tristate "ARM AMBA PL030 RTC"

	depends on ARM_AMBA

drivers/rtc/Makefile

+0 −1
Original line number Diff line number Diff line
@@ -178,7 +178,6 @@ obj-$(CONFIG_RTC_DRV_TPS6586X) += rtc-tps6586x.o 
obj-$(CONFIG_RTC_DRV_TPS65910)	+= rtc-tps65910.o

obj-$(CONFIG_RTC_DRV_TWL4030)	+= rtc-twl.o

obj-$(CONFIG_RTC_DRV_V3020)	+= rtc-v3020.o

obj-$(CONFIG_RTC_DRV_VR41XX)	+= rtc-vr41xx.o

obj-$(CONFIG_RTC_DRV_VT8500)	+= rtc-vt8500.o

obj-$(CONFIG_RTC_DRV_WILCO_EC)	+= rtc-wilco-ec.o

obj-$(CONFIG_RTC_DRV_WM831X)	+= rtc-wm831x.o

drivers/rtc/rtc-vr41xx.c

deleted100644 → 0
+0 −363
Original line number Diff line number Diff line 
// SPDX-License-Identifier: GPL-2.0-or-later

/*

 *  Driver for NEC VR4100 series Real Time Clock unit.

 *

 *  Copyright (C) 2003-2008  Yoichi Yuasa <yuasa@linux-mips.org>

 */

#include <linux/compat.h>

#include <linux/err.h>

#include <linux/fs.h>

#include <linux/init.h>

#include <linux/io.h>

#include <linux/ioport.h>

#include <linux/interrupt.h>

#include <linux/module.h>

#include <linux/platform_device.h>

#include <linux/rtc.h>

#include <linux/spinlock.h>

#include <linux/types.h>

#include <linux/uaccess.h>

#include <linux/log2.h>



#include <asm/div64.h>



MODULE_AUTHOR("Yoichi Yuasa <yuasa@linux-mips.org>");

MODULE_DESCRIPTION("NEC VR4100 series RTC driver");

MODULE_LICENSE("GPL v2");



/* RTC 1 registers */

#define ETIMELREG		0x00

#define ETIMEMREG		0x02

#define ETIMEHREG		0x04

/* RFU */

#define ECMPLREG		0x08

#define ECMPMREG		0x0a

#define ECMPHREG		0x0c

/* RFU */

#define RTCL1LREG		0x10

#define RTCL1HREG		0x12

#define RTCL1CNTLREG		0x14

#define RTCL1CNTHREG		0x16

#define RTCL2LREG		0x18

#define RTCL2HREG		0x1a

#define RTCL2CNTLREG		0x1c

#define RTCL2CNTHREG		0x1e



/* RTC 2 registers */

#define TCLKLREG		0x00

#define TCLKHREG		0x02

#define TCLKCNTLREG		0x04

#define TCLKCNTHREG		0x06

/* RFU */

#define RTCINTREG		0x1e

 #define TCLOCK_INT		0x08

 #define RTCLONG2_INT		0x04

 #define RTCLONG1_INT		0x02

 #define ELAPSEDTIME_INT	0x01



#define RTC_FREQUENCY		32768

#define MAX_PERIODIC_RATE	6553



static void __iomem *rtc1_base;

static void __iomem *rtc2_base;



#define rtc1_read(offset)		readw(rtc1_base + (offset))

#define rtc1_write(offset, value)	writew((value), rtc1_base + (offset))



#define rtc2_read(offset)		readw(rtc2_base + (offset))

#define rtc2_write(offset, value)	writew((value), rtc2_base + (offset))



/* 32-bit compat for ioctls that nobody else uses */

#define RTC_EPOCH_READ32	_IOR('p', 0x0d, __u32)



static unsigned long epoch = 1970;	/* Jan 1 1970 00:00:00 */



static DEFINE_SPINLOCK(rtc_lock);

static char rtc_name[] = "RTC";

static unsigned long periodic_count;

static unsigned int alarm_enabled;

static int aie_irq;

static int pie_irq;



static inline time64_t read_elapsed_second(void)

{



	unsigned long first_low, first_mid, first_high;



	unsigned long second_low, second_mid, second_high;



	do {

		first_low = rtc1_read(ETIMELREG);

		first_mid = rtc1_read(ETIMEMREG);

		first_high = rtc1_read(ETIMEHREG);

		second_low = rtc1_read(ETIMELREG);

		second_mid = rtc1_read(ETIMEMREG);

		second_high = rtc1_read(ETIMEHREG);

	} while (first_low != second_low || first_mid != second_mid ||

		 first_high != second_high);



	return ((u64)first_high << 17) | (first_mid << 1) | (first_low >> 15);

}



static inline void write_elapsed_second(time64_t sec)

{

	spin_lock_irq(&rtc_lock);



	rtc1_write(ETIMELREG, (uint16_t)(sec << 15));

	rtc1_write(ETIMEMREG, (uint16_t)(sec >> 1));

	rtc1_write(ETIMEHREG, (uint16_t)(sec >> 17));



	spin_unlock_irq(&rtc_lock);

}



static int vr41xx_rtc_read_time(struct device *dev, struct rtc_time *time)

{

	time64_t epoch_sec, elapsed_sec;



	epoch_sec = mktime64(epoch, 1, 1, 0, 0, 0);

	elapsed_sec = read_elapsed_second();



	rtc_time64_to_tm(epoch_sec + elapsed_sec, time);



	return 0;

}



static int vr41xx_rtc_set_time(struct device *dev, struct rtc_time *time)

{

	time64_t epoch_sec, current_sec;



	epoch_sec = mktime64(epoch, 1, 1, 0, 0, 0);

	current_sec = rtc_tm_to_time64(time);



	write_elapsed_second(current_sec - epoch_sec);



	return 0;

}



static int vr41xx_rtc_read_alarm(struct device *dev, struct rtc_wkalrm *wkalrm)

{

	unsigned long low, mid, high;

	struct rtc_time *time = &wkalrm->time;



	spin_lock_irq(&rtc_lock);



	low = rtc1_read(ECMPLREG);

	mid = rtc1_read(ECMPMREG);

	high = rtc1_read(ECMPHREG);

	wkalrm->enabled = alarm_enabled;



	spin_unlock_irq(&rtc_lock);



	rtc_time64_to_tm((high << 17) | (mid << 1) | (low >> 15), time);



	return 0;

}



static int vr41xx_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *wkalrm)

{

	time64_t alarm_sec;



	alarm_sec = rtc_tm_to_time64(&wkalrm->time);



	spin_lock_irq(&rtc_lock);



	if (alarm_enabled)

		disable_irq(aie_irq);



	rtc1_write(ECMPLREG, (uint16_t)(alarm_sec << 15));

	rtc1_write(ECMPMREG, (uint16_t)(alarm_sec >> 1));

	rtc1_write(ECMPHREG, (uint16_t)(alarm_sec >> 17));



	if (wkalrm->enabled)

		enable_irq(aie_irq);



	alarm_enabled = wkalrm->enabled;



	spin_unlock_irq(&rtc_lock);



	return 0;

}



static int vr41xx_rtc_ioctl(struct device *dev, unsigned int cmd, unsigned long arg)

{

	switch (cmd) {

	case RTC_EPOCH_READ:

		return put_user(epoch, (unsigned long __user *)arg);

#ifdef CONFIG_64BIT

	case RTC_EPOCH_READ32:

		return put_user(epoch, (unsigned int __user *)arg);

#endif

	case RTC_EPOCH_SET:

		/* Doesn't support before 1900 */

		if (arg < 1900)

			return -EINVAL;

		epoch = arg;

		break;

	default:

		return -ENOIOCTLCMD;

	}



	return 0;

}



static int vr41xx_rtc_alarm_irq_enable(struct device *dev, unsigned int enabled)

{

	spin_lock_irq(&rtc_lock);

	if (enabled) {

		if (!alarm_enabled) {

			enable_irq(aie_irq);

			alarm_enabled = 1;

		}

	} else {

		if (alarm_enabled) {

			disable_irq(aie_irq);

			alarm_enabled = 0;

		}

	}

	spin_unlock_irq(&rtc_lock);

	return 0;

}



static irqreturn_t elapsedtime_interrupt(int irq, void *dev_id)

{

	struct platform_device *pdev = (struct platform_device *)dev_id;

	struct rtc_device *rtc = platform_get_drvdata(pdev);



	rtc2_write(RTCINTREG, ELAPSEDTIME_INT);



	rtc_update_irq(rtc, 1, RTC_AF);



	return IRQ_HANDLED;

}



static irqreturn_t rtclong1_interrupt(int irq, void *dev_id)

{

	struct platform_device *pdev = (struct platform_device *)dev_id;

	struct rtc_device *rtc = platform_get_drvdata(pdev);

	unsigned long count = periodic_count;



	rtc2_write(RTCINTREG, RTCLONG1_INT);



	rtc1_write(RTCL1LREG, count);

	rtc1_write(RTCL1HREG, count >> 16);



	rtc_update_irq(rtc, 1, RTC_PF);



	return IRQ_HANDLED;

}



static const struct rtc_class_ops vr41xx_rtc_ops = {

	.ioctl			= vr41xx_rtc_ioctl,

	.read_time		= vr41xx_rtc_read_time,

	.set_time		= vr41xx_rtc_set_time,

	.read_alarm		= vr41xx_rtc_read_alarm,

	.set_alarm		= vr41xx_rtc_set_alarm,

	.alarm_irq_enable	= vr41xx_rtc_alarm_irq_enable,

};



static int rtc_probe(struct platform_device *pdev)

{

	struct resource *res;

	struct rtc_device *rtc;

	int retval;



	if (pdev->num_resources != 4)

		return -EBUSY;



	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);

	if (!res)

		return -EBUSY;



	rtc1_base = devm_ioremap(&pdev->dev, res->start, resource_size(res));

	if (!rtc1_base)

		return -EBUSY;



	res = platform_get_resource(pdev, IORESOURCE_MEM, 1);

	if (!res) {

		retval = -EBUSY;

		goto err_rtc1_iounmap;

	}



	rtc2_base = devm_ioremap(&pdev->dev, res->start, resource_size(res));

	if (!rtc2_base) {

		retval = -EBUSY;

		goto err_rtc1_iounmap;

	}



	rtc = devm_rtc_allocate_device(&pdev->dev);

	if (IS_ERR(rtc)) {

		retval = PTR_ERR(rtc);

		goto err_iounmap_all;

	}



	rtc->ops = &vr41xx_rtc_ops;



	/* 48-bit counter at 32.768 kHz */

	rtc->range_max = (1ULL << 33) - 1;

	rtc->max_user_freq = MAX_PERIODIC_RATE;



	spin_lock_irq(&rtc_lock);



	rtc1_write(ECMPLREG, 0);

	rtc1_write(ECMPMREG, 0);

	rtc1_write(ECMPHREG, 0);

	rtc1_write(RTCL1LREG, 0);

	rtc1_write(RTCL1HREG, 0);



	spin_unlock_irq(&rtc_lock);



	aie_irq = platform_get_irq(pdev, 0);

	if (aie_irq <= 0) {

		retval = -EBUSY;

		goto err_iounmap_all;

	}



	retval = devm_request_irq(&pdev->dev, aie_irq, elapsedtime_interrupt, 0,

				"elapsed_time", pdev);

	if (retval < 0)

		goto err_iounmap_all;



	pie_irq = platform_get_irq(pdev, 1);

	if (pie_irq <= 0) {

		retval = -EBUSY;

		goto err_iounmap_all;

	}



	retval = devm_request_irq(&pdev->dev, pie_irq, rtclong1_interrupt, 0,

				"rtclong1", pdev);

	if (retval < 0)

		goto err_iounmap_all;



	platform_set_drvdata(pdev, rtc);



	disable_irq(aie_irq);

	disable_irq(pie_irq);



	dev_info(&pdev->dev, "Real Time Clock of NEC VR4100 series\n");



	retval = devm_rtc_register_device(rtc);

	if (retval)

		goto err_iounmap_all;



	return 0;



err_iounmap_all:

	rtc2_base = NULL;



err_rtc1_iounmap:

	rtc1_base = NULL;



	return retval;

}



/* work with hotplug and coldplug */

MODULE_ALIAS("platform:RTC");



static struct platform_driver rtc_platform_driver = {

	.probe		= rtc_probe,

	.driver		= {

		.name	= rtc_name,

	},

};



module_platform_driver(rtc_platform_driver);