[PATCH] rtc: remove unused pcap driver
From: Arnd Bergmann
Date: Wed May 27 2026 - 15:40:56 EST
From: Arnd Bergmann <arnd@xxxxxxxx>
The platform was removed a few years ago, and the mfd driver
is also gone now, so it is impossible to build or use it.
Signed-off-by: Arnd Bergmann <arnd@xxxxxxxx>
---
drivers/rtc/Kconfig | 7 --
drivers/rtc/Makefile | 1 -
drivers/rtc/rtc-pcap.c | 179 -----------------------------------------
3 files changed, 187 deletions(-)
delete mode 100644 drivers/rtc/rtc-pcap.c
diff --git a/drivers/rtc/Kconfig b/drivers/rtc/Kconfig
index 364afc73f8ab..01def8231873 100644
--- a/drivers/rtc/Kconfig
+++ b/drivers/rtc/Kconfig
@@ -1763,13 +1763,6 @@ config RTC_DRV_STMP
This driver can also be built as a module. If so, the module
will be called rtc-stmp3xxx.
-config RTC_DRV_PCAP
- tristate "PCAP RTC"
- depends on EZX_PCAP
- help
- If you say Y here you will get support for the RTC found on
- the PCAP2 ASIC used on some Motorola phones.
-
config RTC_DRV_MC13XXX
depends on MFD_MC13XXX
tristate "Freescale MC13xxx RTC"
diff --git a/drivers/rtc/Makefile b/drivers/rtc/Makefile
index 6cf7e066314e..0347645b021f 100644
--- a/drivers/rtc/Makefile
+++ b/drivers/rtc/Makefile
@@ -128,7 +128,6 @@ obj-$(CONFIG_RTC_DRV_OMAP) += rtc-omap.o
obj-$(CONFIG_RTC_DRV_OPAL) += rtc-opal.o
obj-$(CONFIG_RTC_DRV_OPTEE) += rtc-optee.o
obj-$(CONFIG_RTC_DRV_PALMAS) += rtc-palmas.o
-obj-$(CONFIG_RTC_DRV_PCAP) += rtc-pcap.o
obj-$(CONFIG_RTC_DRV_PCF2123) += rtc-pcf2123.o
obj-$(CONFIG_RTC_DRV_PCF2127) += rtc-pcf2127.o
obj-$(CONFIG_RTC_DRV_PCF85063) += rtc-pcf85063.o
diff --git a/drivers/rtc/rtc-pcap.c b/drivers/rtc/rtc-pcap.c
deleted file mode 100644
index d6651611a0c6..000000000000
--- a/drivers/rtc/rtc-pcap.c
+++ /dev/null
@@ -1,179 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-/*
- * pcap rtc code for Motorola EZX phones
- *
- * Copyright (c) 2008 guiming zhuo <gmzhuo@xxxxxxxxx>
- * Copyright (c) 2009 Daniel Ribeiro <drwyrm@xxxxxxxxx>
- *
- * Based on Motorola's rtc.c Copyright (c) 2003-2005 Motorola
- */
-
-#include <linux/kernel.h>
-#include <linux/module.h>
-#include <linux/init.h>
-#include <linux/mfd/ezx-pcap.h>
-#include <linux/rtc.h>
-#include <linux/slab.h>
-#include <linux/platform_device.h>
-
-struct pcap_rtc {
- struct pcap_chip *pcap;
- struct rtc_device *rtc;
-};
-
-static irqreturn_t pcap_rtc_irq(int irq, void *_pcap_rtc)
-{
- struct pcap_rtc *pcap_rtc = _pcap_rtc;
- unsigned long rtc_events;
-
- if (irq == pcap_to_irq(pcap_rtc->pcap, PCAP_IRQ_1HZ))
- rtc_events = RTC_IRQF | RTC_UF;
- else if (irq == pcap_to_irq(pcap_rtc->pcap, PCAP_IRQ_TODA))
- rtc_events = RTC_IRQF | RTC_AF;
- else
- rtc_events = 0;
-
- rtc_update_irq(pcap_rtc->rtc, 1, rtc_events);
- return IRQ_HANDLED;
-}
-
-static int pcap_rtc_read_alarm(struct device *dev, struct rtc_wkalrm *alrm)
-{
- struct pcap_rtc *pcap_rtc = dev_get_drvdata(dev);
- struct rtc_time *tm = &alrm->time;
- unsigned long secs;
- u32 tod; /* time of day, seconds since midnight */
- u32 days; /* days since 1/1/1970 */
-
- ezx_pcap_read(pcap_rtc->pcap, PCAP_REG_RTC_TODA, &tod);
- secs = tod & PCAP_RTC_TOD_MASK;
-
- ezx_pcap_read(pcap_rtc->pcap, PCAP_REG_RTC_DAYA, &days);
- secs += (days & PCAP_RTC_DAY_MASK) * SEC_PER_DAY;
-
- rtc_time64_to_tm(secs, tm);
-
- return 0;
-}
-
-static int pcap_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *alrm)
-{
- struct pcap_rtc *pcap_rtc = dev_get_drvdata(dev);
- unsigned long secs = rtc_tm_to_time64(&alrm->time);
- u32 tod, days;
-
- tod = secs % SEC_PER_DAY;
- ezx_pcap_write(pcap_rtc->pcap, PCAP_REG_RTC_TODA, tod);
-
- days = secs / SEC_PER_DAY;
- ezx_pcap_write(pcap_rtc->pcap, PCAP_REG_RTC_DAYA, days);
-
- return 0;
-}
-
-static int pcap_rtc_read_time(struct device *dev, struct rtc_time *tm)
-{
- struct pcap_rtc *pcap_rtc = dev_get_drvdata(dev);
- unsigned long secs;
- u32 tod, days;
-
- ezx_pcap_read(pcap_rtc->pcap, PCAP_REG_RTC_TOD, &tod);
- secs = tod & PCAP_RTC_TOD_MASK;
-
- ezx_pcap_read(pcap_rtc->pcap, PCAP_REG_RTC_DAY, &days);
- secs += (days & PCAP_RTC_DAY_MASK) * SEC_PER_DAY;
-
- rtc_time64_to_tm(secs, tm);
-
- return 0;
-}
-
-static int pcap_rtc_set_time(struct device *dev, struct rtc_time *tm)
-{
- struct pcap_rtc *pcap_rtc = dev_get_drvdata(dev);
- unsigned long secs = rtc_tm_to_time64(tm);
- u32 tod, days;
-
- tod = secs % SEC_PER_DAY;
- ezx_pcap_write(pcap_rtc->pcap, PCAP_REG_RTC_TOD, tod);
-
- days = secs / SEC_PER_DAY;
- ezx_pcap_write(pcap_rtc->pcap, PCAP_REG_RTC_DAY, days);
-
- return 0;
-}
-
-static int pcap_rtc_irq_enable(struct device *dev, int pirq, unsigned int en)
-{
- struct pcap_rtc *pcap_rtc = dev_get_drvdata(dev);
-
- if (en)
- enable_irq(pcap_to_irq(pcap_rtc->pcap, pirq));
- else
- disable_irq(pcap_to_irq(pcap_rtc->pcap, pirq));
-
- return 0;
-}
-
-static int pcap_rtc_alarm_irq_enable(struct device *dev, unsigned int en)
-{
- return pcap_rtc_irq_enable(dev, PCAP_IRQ_TODA, en);
-}
-
-static const struct rtc_class_ops pcap_rtc_ops = {
- .read_time = pcap_rtc_read_time,
- .set_time = pcap_rtc_set_time,
- .read_alarm = pcap_rtc_read_alarm,
- .set_alarm = pcap_rtc_set_alarm,
- .alarm_irq_enable = pcap_rtc_alarm_irq_enable,
-};
-
-static int __init pcap_rtc_probe(struct platform_device *pdev)
-{
- struct pcap_rtc *pcap_rtc;
- int timer_irq, alarm_irq;
- int err = -ENOMEM;
-
- pcap_rtc = devm_kzalloc(&pdev->dev, sizeof(struct pcap_rtc),
- GFP_KERNEL);
- if (!pcap_rtc)
- return err;
-
- pcap_rtc->pcap = dev_get_drvdata(pdev->dev.parent);
-
- platform_set_drvdata(pdev, pcap_rtc);
-
- pcap_rtc->rtc = devm_rtc_allocate_device(&pdev->dev);
- if (IS_ERR(pcap_rtc->rtc))
- return PTR_ERR(pcap_rtc->rtc);
-
- pcap_rtc->rtc->ops = &pcap_rtc_ops;
- pcap_rtc->rtc->range_max = (1 << 14) * 86400ULL - 1;
-
- timer_irq = pcap_to_irq(pcap_rtc->pcap, PCAP_IRQ_1HZ);
- alarm_irq = pcap_to_irq(pcap_rtc->pcap, PCAP_IRQ_TODA);
-
- err = devm_request_irq(&pdev->dev, timer_irq, pcap_rtc_irq, 0,
- "RTC Timer", pcap_rtc);
- if (err)
- return err;
-
- err = devm_request_irq(&pdev->dev, alarm_irq, pcap_rtc_irq, 0,
- "RTC Alarm", pcap_rtc);
- if (err)
- return err;
-
- return devm_rtc_register_device(pcap_rtc->rtc);
-}
-
-static struct platform_driver pcap_rtc_driver = {
- .driver = {
- .name = "pcap-rtc",
- },
-};
-
-module_platform_driver_probe(pcap_rtc_driver, pcap_rtc_probe);
-
-MODULE_DESCRIPTION("Motorola pcap rtc driver");
-MODULE_AUTHOR("guiming zhuo <gmzhuo@xxxxxxxxx>");
-MODULE_LICENSE("GPL");
--
2.39.5