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Message-Id: <20201113004624.3788573-1-rkir@google.com>
Date: Thu, 12 Nov 2020 16:46:24 -0800
From: rkir@...gle.com
To: gregkh@...uxfoundation.org
Cc: linux-kernel@...r.kernel.org, lfy@...gle.com,
Roman Kiryanov <rkir@...gle.com>
Subject: [PATCH] drivers: rtc: retire RTC_DRV_GOLDFISH
From: Roman Kiryanov <rkir@...gle.com>
The only user of RTC_DRV_GOLDFISH is
the MIPS flavor of Android Studio Emulator
(goldfish) which should be also retired.
Signed-off-by: Roman Kiryanov <rkir@...gle.com>
---
arch/riscv/Kconfig.socs | 1 -
drivers/rtc/Kconfig | 10 --
drivers/rtc/Makefile | 1 -
drivers/rtc/rtc-goldfish.c | 216 -------------------------------------
4 files changed, 228 deletions(-)
delete mode 100644 drivers/rtc/rtc-goldfish.c
diff --git a/arch/riscv/Kconfig.socs b/arch/riscv/Kconfig.socs
index 8a55f6156661..9c4c2abb2011 100644
--- a/arch/riscv/Kconfig.socs
+++ b/arch/riscv/Kconfig.socs
@@ -17,7 +17,6 @@ config SOC_VIRT
select POWER_RESET_SYSCON
select POWER_RESET_SYSCON_POWEROFF
select GOLDFISH
- select RTC_DRV_GOLDFISH if RTC_CLASS
select SIFIVE_PLIC
help
This enables support for QEMU Virt Machine.
diff --git a/drivers/rtc/Kconfig b/drivers/rtc/Kconfig
index 65ad9d0b47ab..e574f24f3b08 100644
--- a/drivers/rtc/Kconfig
+++ b/drivers/rtc/Kconfig
@@ -1932,16 +1932,6 @@ config RTC_DRV_HID_SENSOR_TIME
If this driver is compiled as a module, it will be named
rtc-hid-sensor-time.
-config RTC_DRV_GOLDFISH
- tristate "Goldfish Real Time Clock"
- depends on OF && HAS_IOMEM
- depends on GOLDFISH || COMPILE_TEST
- help
- Say yes to enable RTC driver for the Goldfish based virtual platform.
-
- Goldfish is a code name for the virtual platform developed by Google
- for Android emulation.
-
config RTC_DRV_WILCO_EC
tristate "Wilco EC RTC"
depends on WILCO_EC
diff --git a/drivers/rtc/Makefile b/drivers/rtc/Makefile
index bfb57464118d..1730d0676096 100644
--- a/drivers/rtc/Makefile
+++ b/drivers/rtc/Makefile
@@ -71,7 +71,6 @@ obj-$(CONFIG_RTC_DRV_FM3130) += rtc-fm3130.o
obj-$(CONFIG_RTC_DRV_FSL_FTM_ALARM) += rtc-fsl-ftm-alarm.o
obj-$(CONFIG_RTC_DRV_FTRTC010) += rtc-ftrtc010.o
obj-$(CONFIG_RTC_DRV_GENERIC) += rtc-generic.o
-obj-$(CONFIG_RTC_DRV_GOLDFISH) += rtc-goldfish.o
obj-$(CONFIG_RTC_DRV_HID_SENSOR_TIME) += rtc-hid-sensor-time.o
obj-$(CONFIG_RTC_DRV_HYM8563) += rtc-hym8563.o
obj-$(CONFIG_RTC_DRV_IMXDI) += rtc-imxdi.o
diff --git a/drivers/rtc/rtc-goldfish.c b/drivers/rtc/rtc-goldfish.c
deleted file mode 100644
index 6349d2cd3680..000000000000
--- a/drivers/rtc/rtc-goldfish.c
+++ /dev/null
@@ -1,216 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-/* drivers/rtc/rtc-goldfish.c
- *
- * Copyright (C) 2007 Google, Inc.
- * Copyright (C) 2017 Imagination Technologies Ltd.
- */
-
-#include <linux/io.h>
-#include <linux/module.h>
-#include <linux/of.h>
-#include <linux/platform_device.h>
-#include <linux/rtc.h>
-
-#define TIMER_TIME_LOW 0x00 /* get low bits of current time */
- /* and update TIMER_TIME_HIGH */
-#define TIMER_TIME_HIGH 0x04 /* get high bits of time at last */
- /* TIMER_TIME_LOW read */
-#define TIMER_ALARM_LOW 0x08 /* set low bits of alarm and */
- /* activate it */
-#define TIMER_ALARM_HIGH 0x0c /* set high bits of next alarm */
-#define TIMER_IRQ_ENABLED 0x10
-#define TIMER_CLEAR_ALARM 0x14
-#define TIMER_ALARM_STATUS 0x18
-#define TIMER_CLEAR_INTERRUPT 0x1c
-
-struct goldfish_rtc {
- void __iomem *base;
- int irq;
- struct rtc_device *rtc;
-};
-
-static int goldfish_rtc_read_alarm(struct device *dev,
- struct rtc_wkalrm *alrm)
-{
- u64 rtc_alarm;
- u64 rtc_alarm_low;
- u64 rtc_alarm_high;
- void __iomem *base;
- struct goldfish_rtc *rtcdrv;
-
- rtcdrv = dev_get_drvdata(dev);
- base = rtcdrv->base;
-
- rtc_alarm_low = readl(base + TIMER_ALARM_LOW);
- rtc_alarm_high = readl(base + TIMER_ALARM_HIGH);
- rtc_alarm = (rtc_alarm_high << 32) | rtc_alarm_low;
-
- do_div(rtc_alarm, NSEC_PER_SEC);
- memset(alrm, 0, sizeof(struct rtc_wkalrm));
-
- rtc_time64_to_tm(rtc_alarm, &alrm->time);
-
- if (readl(base + TIMER_ALARM_STATUS))
- alrm->enabled = 1;
- else
- alrm->enabled = 0;
-
- return 0;
-}
-
-static int goldfish_rtc_set_alarm(struct device *dev,
- struct rtc_wkalrm *alrm)
-{
- struct goldfish_rtc *rtcdrv;
- u64 rtc_alarm64;
- u64 rtc_status_reg;
- void __iomem *base;
-
- rtcdrv = dev_get_drvdata(dev);
- base = rtcdrv->base;
-
- if (alrm->enabled) {
- rtc_alarm64 = rtc_tm_to_time64(&alrm->time) * NSEC_PER_SEC;
- writel((rtc_alarm64 >> 32), base + TIMER_ALARM_HIGH);
- writel(rtc_alarm64, base + TIMER_ALARM_LOW);
- writel(1, base + TIMER_IRQ_ENABLED);
- } else {
- /*
- * if this function was called with enabled=0
- * then it could mean that the application is
- * trying to cancel an ongoing alarm
- */
- rtc_status_reg = readl(base + TIMER_ALARM_STATUS);
- if (rtc_status_reg)
- writel(1, base + TIMER_CLEAR_ALARM);
- }
-
- return 0;
-}
-
-static int goldfish_rtc_alarm_irq_enable(struct device *dev,
- unsigned int enabled)
-{
- void __iomem *base;
- struct goldfish_rtc *rtcdrv;
-
- rtcdrv = dev_get_drvdata(dev);
- base = rtcdrv->base;
-
- if (enabled)
- writel(1, base + TIMER_IRQ_ENABLED);
- else
- writel(0, base + TIMER_IRQ_ENABLED);
-
- return 0;
-}
-
-static irqreturn_t goldfish_rtc_interrupt(int irq, void *dev_id)
-{
- struct goldfish_rtc *rtcdrv = dev_id;
- void __iomem *base = rtcdrv->base;
-
- writel(1, base + TIMER_CLEAR_INTERRUPT);
-
- rtc_update_irq(rtcdrv->rtc, 1, RTC_IRQF | RTC_AF);
-
- return IRQ_HANDLED;
-}
-
-static int goldfish_rtc_read_time(struct device *dev, struct rtc_time *tm)
-{
- struct goldfish_rtc *rtcdrv;
- void __iomem *base;
- u64 time_high;
- u64 time_low;
- u64 time;
-
- rtcdrv = dev_get_drvdata(dev);
- base = rtcdrv->base;
-
- time_low = readl(base + TIMER_TIME_LOW);
- time_high = readl(base + TIMER_TIME_HIGH);
- time = (time_high << 32) | time_low;
-
- do_div(time, NSEC_PER_SEC);
-
- rtc_time64_to_tm(time, tm);
-
- return 0;
-}
-
-static int goldfish_rtc_set_time(struct device *dev, struct rtc_time *tm)
-{
- struct goldfish_rtc *rtcdrv;
- void __iomem *base;
- u64 now64;
-
- rtcdrv = dev_get_drvdata(dev);
- base = rtcdrv->base;
-
- now64 = rtc_tm_to_time64(tm) * NSEC_PER_SEC;
- writel((now64 >> 32), base + TIMER_TIME_HIGH);
- writel(now64, base + TIMER_TIME_LOW);
-
- return 0;
-}
-
-static const struct rtc_class_ops goldfish_rtc_ops = {
- .read_time = goldfish_rtc_read_time,
- .set_time = goldfish_rtc_set_time,
- .read_alarm = goldfish_rtc_read_alarm,
- .set_alarm = goldfish_rtc_set_alarm,
- .alarm_irq_enable = goldfish_rtc_alarm_irq_enable
-};
-
-static int goldfish_rtc_probe(struct platform_device *pdev)
-{
- struct goldfish_rtc *rtcdrv;
- int err;
-
- rtcdrv = devm_kzalloc(&pdev->dev, sizeof(*rtcdrv), GFP_KERNEL);
- if (!rtcdrv)
- return -ENOMEM;
-
- platform_set_drvdata(pdev, rtcdrv);
- rtcdrv->base = devm_platform_ioremap_resource(pdev, 0);
- if (IS_ERR(rtcdrv->base))
- return PTR_ERR(rtcdrv->base);
-
- rtcdrv->irq = platform_get_irq(pdev, 0);
- if (rtcdrv->irq < 0)
- return -ENODEV;
-
- rtcdrv->rtc = devm_rtc_allocate_device(&pdev->dev);
- if (IS_ERR(rtcdrv->rtc))
- return PTR_ERR(rtcdrv->rtc);
-
- rtcdrv->rtc->ops = &goldfish_rtc_ops;
- rtcdrv->rtc->range_max = U64_MAX / NSEC_PER_SEC;
-
- err = devm_request_irq(&pdev->dev, rtcdrv->irq,
- goldfish_rtc_interrupt,
- 0, pdev->name, rtcdrv);
- if (err)
- return err;
-
- return rtc_register_device(rtcdrv->rtc);
-}
-
-static const struct of_device_id goldfish_rtc_of_match[] = {
- { .compatible = "google,goldfish-rtc", },
- {},
-};
-MODULE_DEVICE_TABLE(of, goldfish_rtc_of_match);
-
-static struct platform_driver goldfish_rtc = {
- .probe = goldfish_rtc_probe,
- .driver = {
- .name = "goldfish_rtc",
- .of_match_table = goldfish_rtc_of_match,
- }
-};
-
-module_platform_driver(goldfish_rtc);
-
-MODULE_LICENSE("GPL v2");
--
2.29.2.299.gdc1121823c-goog
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