rtc: remove fb-puv3 driver (fa4b9519) · Commits · EulixOS / Software / Kernel

MAINTAINERS

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		@@ -13585,7 +13585,6 @@ M: Guan Xuetao <gxt@pku.edu.cn>
		S: Maintained
		W: http://mprc.pku.edu.cn/~guanxuetao/linux
		T: git git://github.com/gxt/linux.git
		F: drivers/rtc/rtc-puv3.c

		PLANTOWER PMS7003 AIR POLLUTION SENSOR DRIVER
		M: Tomasz Duszynski <tduszyns@gmail.com>

drivers/rtc/Kconfig

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		@@ -1729,15 +1729,6 @@ config RTC_DRV_TEGRA
		This drive can also be built as a module. If so, the module
		will be called rtc-tegra.

		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.

		config RTC_DRV_LOONGSON1
		tristate "loongson1 RTC support"
		depends on MACH_LOONGSON32

drivers/rtc/Makefile

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		@@ -128,7 +128,6 @@ obj-$(CONFIG_RTC_DRV_PL030) += rtc-pl030.o
		obj-$(CONFIG_RTC_DRV_PL031) += rtc-pl031.o
		obj-$(CONFIG_RTC_DRV_PM8XXX) += rtc-pm8xxx.o
		obj-$(CONFIG_RTC_DRV_PS3) += rtc-ps3.o
		obj-$(CONFIG_RTC_DRV_PUV3) += rtc-puv3.o
		obj-$(CONFIG_RTC_DRV_PXA) += rtc-pxa.o
		obj-$(CONFIG_RTC_DRV_R7301) += rtc-r7301.o
		obj-$(CONFIG_RTC_DRV_R9701) += rtc-r9701.o

drivers/rtc/rtc-puv3.c

deleted100644 → 0

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		// SPDX-License-Identifier: GPL-2.0-only
		/*
		* RTC driver code specific to PKUnity SoC and UniCore ISA
		*
		* Maintained by GUAN Xue-tao <gxt@mprc.pku.edu.cn>
		* Copyright (C) 2001-2010 Guan Xuetao
		*/

		#include <linux/module.h>
		#include <linux/fs.h>
		#include <linux/string.h>
		#include <linux/init.h>
		#include <linux/platform_device.h>
		#include <linux/interrupt.h>
		#include <linux/rtc.h>
		#include <linux/bcd.h>
		#include <linux/clk.h>
		#include <linux/log2.h>
		#include <linux/slab.h>
		#include <linux/uaccess.h>
		#include <linux/io.h>

		#include <asm/irq.h>
		#include <mach/hardware.h>

		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(struct device *dev, int to)
		{
		unsigned int tmp;

		dev_dbg(dev, "%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;

		dev_dbg(dev, "%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_time64_to_tm(readl(RTC_RCNR), rtc_tm);

		dev_dbg(dev, "read time %ptRr\n", rtc_tm);

		return 0;
		}

		static int puv3_rtc_settime(struct device dev, struct rtc_time tm)
		{
		dev_dbg(dev, "set time %ptRr\n", tm);

		writel(rtc_tm_to_time64(tm), RTC_RCNR);

		return 0;
		}

		static int puv3_rtc_getalarm(struct device dev, struct rtc_wkalrm alrm)
		{
		struct rtc_time *alm_tm = &alrm->time;

		rtc_time64_to_tm(readl(RTC_RTAR), alm_tm);

		alrm->enabled = readl(RTC_RTSR) & RTC_RTSR_ALE;

		dev_dbg(dev, "read alarm: %d, %ptRr\n", alrm->enabled, alm_tm);

		return 0;
		}

		static int puv3_rtc_setalarm(struct device dev, struct rtc_wkalrm alrm)
		{
		struct rtc_time *tm = &alrm->time;

		dev_dbg(dev, "set alarm: %d, %ptRr\n", alrm->enabled, tm);

		writel(rtc_tm_to_time64(tm), RTC_RTAR);

		puv3_rtc_setaie(dev, 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 const struct rtc_class_ops puv3_rtcops = {
		.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 device *dev, 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(dev, "rtc disabled, re-enabling\n");
		writel(readl(RTC_RTSR) \| RTC_RTSR_HZE, RTC_RTSR);
		}
		}
		}

		static int puv3_rtc_remove(struct platform_device *dev)
		{
		puv3_rtc_setpie(&dev->dev, 0);
		puv3_rtc_setaie(&dev->dev, 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;

		dev_dbg(&pdev->dev, "%s: probe=%p\n", __func__, pdev);

		/* find the IRQs */
		puv3_rtc_tickno = platform_get_irq(pdev, 1);
		if (puv3_rtc_tickno < 0)
		return -ENOENT;

		puv3_rtc_alarmno = platform_get_irq(pdev, 0);
		if (puv3_rtc_alarmno < 0)
		return -ENOENT;

		dev_dbg(&pdev->dev, "PKUnity_rtc: tick irq %d, alarm irq %d\n",
		puv3_rtc_tickno, puv3_rtc_alarmno);

		rtc = devm_rtc_allocate_device(&pdev->dev);
		if (IS_ERR(rtc))
		return PTR_ERR(rtc);

		ret = devm_request_irq(&pdev->dev, puv3_rtc_alarmno, puv3_rtc_alarmirq,
		0, "pkunity-rtc alarm", rtc);
		if (ret) {
		dev_err(&pdev->dev, "IRQ%d error %d\n", puv3_rtc_alarmno, ret);
		return ret;
		}

		ret = devm_request_irq(&pdev->dev, puv3_rtc_tickno, puv3_rtc_tickirq,
		0, "pkunity-rtc tick", rtc);
		if (ret) {
		dev_err(&pdev->dev, "IRQ%d error %d\n", puv3_rtc_tickno, ret);
		return ret;
		}

		/* 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, resource_size(res),
		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->dev, 1);

		/* register RTC and exit */
		rtc->ops = &puv3_rtcops;
		rtc->range_max = U32_MAX;
		ret = rtc_register_device(rtc);
		if (ret)
		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->dev, 0);
		release_resource(puv3_rtc_mem);

		err_nores:
		return ret;
		}

		#ifdef CONFIG_PM_SLEEP
		static int ticnt_save;

		static int puv3_rtc_suspend(struct device *dev)
		{
		/* save RTAR for anyone using periodic interrupts */
		ticnt_save = readl(RTC_RTAR);
		puv3_rtc_enable(dev, 0);
		return 0;
		}

		static int puv3_rtc_resume(struct device *dev)
		{
		puv3_rtc_enable(dev, 1);
		writel(ticnt_save, RTC_RTAR);
		return 0;
		}
		#endif

		static SIMPLE_DEV_PM_OPS(puv3_rtc_pm_ops, puv3_rtc_suspend, puv3_rtc_resume);

		static struct platform_driver puv3_rtc_driver = {
		.probe = puv3_rtc_probe,
		.remove = puv3_rtc_remove,
		.driver = {
		.name = "PKUnity-v3-RTC",
		.pm = &puv3_rtc_pm_ops,
		}
		};

		module_platform_driver(puv3_rtc_driver);

		MODULE_DESCRIPTION("RTC Driver for the PKUnity v3 chip");
		MODULE_AUTHOR("Hu Dongliang");
		MODULE_LICENSE("GPL v2");