rtc: tx4939: Remove driver
CPU support for TX49xx is getting removed, so remove rtc driver for it. Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de> Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com> Link: https://lore.kernel.org/r/20210105140305.141401-9-tsbogend@alpha.franken.de
This commit is contained in:
Thomas Bogendoerfer
Alexandre Belloni
Родитель
51f9b1f8ee
Коммит
446667df28
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@ -1587,13 +1587,6 @@ config RTC_DRV_STARFIRE
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If you say Y here you will get support for the RTC found on
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Starfire systems.
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config RTC_DRV_TX4939
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tristate "TX4939 SoC"
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depends on SOC_TX4939 || COMPILE_TEST
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help
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Driver for the internal RTC (Realtime Clock) module found on
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Toshiba TX4939 SoC.
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config RTC_DRV_MV
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tristate "Marvell SoC RTC"
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depends on ARCH_DOVE || ARCH_MVEBU || COMPILE_TEST
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@ -171,7 +171,6 @@ obj-$(CONFIG_RTC_DRV_TPS6586X) += rtc-tps6586x.o
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obj-$(CONFIG_RTC_DRV_TPS65910) += rtc-tps65910.o
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obj-$(CONFIG_RTC_DRV_TPS80031) += rtc-tps80031.o
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obj-$(CONFIG_RTC_DRV_TWL4030) += rtc-twl.o
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obj-$(CONFIG_RTC_DRV_TX4939) += rtc-tx4939.o
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obj-$(CONFIG_RTC_DRV_V3020) += rtc-v3020.o
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obj-$(CONFIG_RTC_DRV_VR41XX) += rtc-vr41xx.o
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obj-$(CONFIG_RTC_DRV_VRTC) += rtc-mrst.o
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@ -1,303 +0,0 @@
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// SPDX-License-Identifier: GPL-2.0
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/*
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* TX4939 internal RTC driver
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* Based on RBTX49xx patch from CELF patch archive.
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*
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* (C) Copyright TOSHIBA CORPORATION 2005-2007
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*/
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#include <linux/rtc.h>
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#include <linux/platform_device.h>
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#include <linux/interrupt.h>
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#include <linux/module.h>
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#include <linux/io.h>
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#include <linux/gfp.h>
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#define TX4939_RTCCTL_ALME 0x00000080
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#define TX4939_RTCCTL_ALMD 0x00000040
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#define TX4939_RTCCTL_BUSY 0x00000020
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#define TX4939_RTCCTL_COMMAND 0x00000007
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#define TX4939_RTCCTL_COMMAND_NOP 0x00000000
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#define TX4939_RTCCTL_COMMAND_GETTIME 0x00000001
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#define TX4939_RTCCTL_COMMAND_SETTIME 0x00000002
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#define TX4939_RTCCTL_COMMAND_GETALARM 0x00000003
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#define TX4939_RTCCTL_COMMAND_SETALARM 0x00000004
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#define TX4939_RTCTBC_PM 0x00000080
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#define TX4939_RTCTBC_COMP 0x0000007f
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#define TX4939_RTC_REG_RAMSIZE 0x00000100
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#define TX4939_RTC_REG_RWBSIZE 0x00000006
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struct tx4939_rtc_reg {
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__u32 ctl;
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__u32 adr;
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__u32 dat;
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__u32 tbc;
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};
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struct tx4939rtc_plat_data {
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struct rtc_device *rtc;
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struct tx4939_rtc_reg __iomem *rtcreg;
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spinlock_t lock;
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};
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static int tx4939_rtc_cmd(struct tx4939_rtc_reg __iomem *rtcreg, int cmd)
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{
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int i = 0;
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__raw_writel(cmd, &rtcreg->ctl);
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/* This might take 30us (next 32.768KHz clock) */
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while (__raw_readl(&rtcreg->ctl) & TX4939_RTCCTL_BUSY) {
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/* timeout on approx. 100us (@ GBUS200MHz) */
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if (i++ > 200 * 100)
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return -EBUSY;
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cpu_relax();
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}
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return 0;
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}
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static int tx4939_rtc_set_time(struct device *dev, struct rtc_time *tm)
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{
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struct tx4939rtc_plat_data *pdata = dev_get_drvdata(dev);
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struct tx4939_rtc_reg __iomem *rtcreg = pdata->rtcreg;
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unsigned long secs = rtc_tm_to_time64(tm);
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int i, ret;
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unsigned char buf[6];
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buf[0] = 0;
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buf[1] = 0;
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buf[2] = secs;
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buf[3] = secs >> 8;
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buf[4] = secs >> 16;
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buf[5] = secs >> 24;
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spin_lock_irq(&pdata->lock);
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__raw_writel(0, &rtcreg->adr);
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for (i = 0; i < 6; i++)
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__raw_writel(buf[i], &rtcreg->dat);
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ret = tx4939_rtc_cmd(rtcreg,
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TX4939_RTCCTL_COMMAND_SETTIME |
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(__raw_readl(&rtcreg->ctl) & TX4939_RTCCTL_ALME));
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spin_unlock_irq(&pdata->lock);
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return ret;
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}
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static int tx4939_rtc_read_time(struct device *dev, struct rtc_time *tm)
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{
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struct tx4939rtc_plat_data *pdata = dev_get_drvdata(dev);
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struct tx4939_rtc_reg __iomem *rtcreg = pdata->rtcreg;
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int i, ret;
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unsigned long sec;
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unsigned char buf[6];
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spin_lock_irq(&pdata->lock);
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ret = tx4939_rtc_cmd(rtcreg,
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TX4939_RTCCTL_COMMAND_GETTIME |
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(__raw_readl(&rtcreg->ctl) & TX4939_RTCCTL_ALME));
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if (ret) {
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spin_unlock_irq(&pdata->lock);
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return ret;
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}
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__raw_writel(2, &rtcreg->adr);
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for (i = 2; i < 6; i++)
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buf[i] = __raw_readl(&rtcreg->dat);
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spin_unlock_irq(&pdata->lock);
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sec = ((unsigned long)buf[5] << 24) | (buf[4] << 16) |
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(buf[3] << 8) | buf[2];
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rtc_time64_to_tm(sec, tm);
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return 0;
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}
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static int tx4939_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *alrm)
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{
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struct tx4939rtc_plat_data *pdata = dev_get_drvdata(dev);
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struct tx4939_rtc_reg __iomem *rtcreg = pdata->rtcreg;
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int i, ret;
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unsigned long sec;
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unsigned char buf[6];
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sec = rtc_tm_to_time64(&alrm->time);
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buf[0] = 0;
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buf[1] = 0;
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buf[2] = sec;
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buf[3] = sec >> 8;
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buf[4] = sec >> 16;
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buf[5] = sec >> 24;
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spin_lock_irq(&pdata->lock);
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__raw_writel(0, &rtcreg->adr);
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for (i = 0; i < 6; i++)
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__raw_writel(buf[i], &rtcreg->dat);
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ret = tx4939_rtc_cmd(rtcreg, TX4939_RTCCTL_COMMAND_SETALARM |
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(alrm->enabled ? TX4939_RTCCTL_ALME : 0));
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spin_unlock_irq(&pdata->lock);
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return ret;
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}
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static int tx4939_rtc_read_alarm(struct device *dev, struct rtc_wkalrm *alrm)
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{
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struct tx4939rtc_plat_data *pdata = dev_get_drvdata(dev);
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struct tx4939_rtc_reg __iomem *rtcreg = pdata->rtcreg;
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int i, ret;
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unsigned long sec;
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unsigned char buf[6];
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u32 ctl;
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spin_lock_irq(&pdata->lock);
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ret = tx4939_rtc_cmd(rtcreg,
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TX4939_RTCCTL_COMMAND_GETALARM |
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(__raw_readl(&rtcreg->ctl) & TX4939_RTCCTL_ALME));
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if (ret) {
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spin_unlock_irq(&pdata->lock);
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return ret;
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}
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__raw_writel(2, &rtcreg->adr);
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for (i = 2; i < 6; i++)
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buf[i] = __raw_readl(&rtcreg->dat);
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ctl = __raw_readl(&rtcreg->ctl);
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alrm->enabled = (ctl & TX4939_RTCCTL_ALME) ? 1 : 0;
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alrm->pending = (ctl & TX4939_RTCCTL_ALMD) ? 1 : 0;
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spin_unlock_irq(&pdata->lock);
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sec = ((unsigned long)buf[5] << 24) | (buf[4] << 16) |
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(buf[3] << 8) | buf[2];
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rtc_time64_to_tm(sec, &alrm->time);
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return rtc_valid_tm(&alrm->time);
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}
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static int tx4939_rtc_alarm_irq_enable(struct device *dev, unsigned int enabled)
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{
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struct tx4939rtc_plat_data *pdata = dev_get_drvdata(dev);
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spin_lock_irq(&pdata->lock);
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tx4939_rtc_cmd(pdata->rtcreg,
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TX4939_RTCCTL_COMMAND_NOP |
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(enabled ? TX4939_RTCCTL_ALME : 0));
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spin_unlock_irq(&pdata->lock);
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return 0;
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}
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static irqreturn_t tx4939_rtc_interrupt(int irq, void *dev_id)
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{
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struct tx4939rtc_plat_data *pdata = dev_get_drvdata(dev_id);
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struct tx4939_rtc_reg __iomem *rtcreg = pdata->rtcreg;
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unsigned long events = RTC_IRQF;
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spin_lock(&pdata->lock);
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if (__raw_readl(&rtcreg->ctl) & TX4939_RTCCTL_ALMD) {
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events |= RTC_AF;
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tx4939_rtc_cmd(rtcreg, TX4939_RTCCTL_COMMAND_NOP);
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}
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spin_unlock(&pdata->lock);
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rtc_update_irq(pdata->rtc, 1, events);
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return IRQ_HANDLED;
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}
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static const struct rtc_class_ops tx4939_rtc_ops = {
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.read_time = tx4939_rtc_read_time,
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.read_alarm = tx4939_rtc_read_alarm,
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.set_alarm = tx4939_rtc_set_alarm,
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.set_time = tx4939_rtc_set_time,
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.alarm_irq_enable = tx4939_rtc_alarm_irq_enable,
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};
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static int tx4939_nvram_read(void *priv, unsigned int pos, void *val,
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size_t bytes)
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{
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struct tx4939rtc_plat_data *pdata = priv;
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struct tx4939_rtc_reg __iomem *rtcreg = pdata->rtcreg;
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u8 *buf = val;
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spin_lock_irq(&pdata->lock);
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for (; bytes; bytes--) {
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__raw_writel(pos++, &rtcreg->adr);
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*buf++ = __raw_readl(&rtcreg->dat);
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}
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spin_unlock_irq(&pdata->lock);
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return 0;
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}
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static int tx4939_nvram_write(void *priv, unsigned int pos, void *val,
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size_t bytes)
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{
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struct tx4939rtc_plat_data *pdata = priv;
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struct tx4939_rtc_reg __iomem *rtcreg = pdata->rtcreg;
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u8 *buf = val;
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spin_lock_irq(&pdata->lock);
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for (; bytes; bytes--) {
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__raw_writel(pos++, &rtcreg->adr);
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__raw_writel(*buf++, &rtcreg->dat);
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}
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spin_unlock_irq(&pdata->lock);
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return 0;
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}
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static int __init tx4939_rtc_probe(struct platform_device *pdev)
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{
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struct rtc_device *rtc;
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struct tx4939rtc_plat_data *pdata;
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int irq, ret;
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struct nvmem_config nvmem_cfg = {
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.name = "tx4939_nvram",
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.size = TX4939_RTC_REG_RAMSIZE,
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.reg_read = tx4939_nvram_read,
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.reg_write = tx4939_nvram_write,
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};
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irq = platform_get_irq(pdev, 0);
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if (irq < 0)
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return -ENODEV;
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pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL);
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if (!pdata)
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return -ENOMEM;
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platform_set_drvdata(pdev, pdata);
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pdata->rtcreg = devm_platform_ioremap_resource(pdev, 0);
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if (IS_ERR(pdata->rtcreg))
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return PTR_ERR(pdata->rtcreg);
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spin_lock_init(&pdata->lock);
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tx4939_rtc_cmd(pdata->rtcreg, TX4939_RTCCTL_COMMAND_NOP);
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if (devm_request_irq(&pdev->dev, irq, tx4939_rtc_interrupt,
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0, pdev->name, &pdev->dev) < 0)
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return -EBUSY;
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rtc = devm_rtc_allocate_device(&pdev->dev);
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if (IS_ERR(rtc))
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return PTR_ERR(rtc);
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rtc->ops = &tx4939_rtc_ops;
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rtc->range_max = U32_MAX;
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pdata->rtc = rtc;
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nvmem_cfg.priv = pdata;
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ret = devm_rtc_nvmem_register(rtc, &nvmem_cfg);
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if (ret)
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return ret;
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return devm_rtc_register_device(rtc);
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}
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static int __exit tx4939_rtc_remove(struct platform_device *pdev)
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{
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struct tx4939rtc_plat_data *pdata = platform_get_drvdata(pdev);
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spin_lock_irq(&pdata->lock);
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tx4939_rtc_cmd(pdata->rtcreg, TX4939_RTCCTL_COMMAND_NOP);
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spin_unlock_irq(&pdata->lock);
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return 0;
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}
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static struct platform_driver tx4939_rtc_driver = {
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.remove = __exit_p(tx4939_rtc_remove),
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.driver = {
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.name = "tx4939rtc",
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},
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};
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module_platform_driver_probe(tx4939_rtc_driver, tx4939_rtc_probe);
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MODULE_AUTHOR("Atsushi Nemoto <anemo@mba.ocn.ne.jp>");
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MODULE_DESCRIPTION("TX4939 internal RTC driver");
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MODULE_LICENSE("GPL v2");
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MODULE_ALIAS("platform:tx4939rtc");
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