mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-11-01 17:08:10 +00:00
rtc: remove ste coh901 driver
The ST-Ericsson U300 platform is getting removed, so this driver is no longer needed. Cc: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Arnd Bergmann <arnd@arndb.de> Reviewed-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com> Link: https://lore.kernel.org/r/20210120154158.1860736-3-arnd@kernel.org
This commit is contained in:
Arnd Bergmann
Alexandre Belloni
parent
9d0735519f
commit
dd2d3b4003
4 changed files with 0 additions and 319 deletions
|
|
@ -1,16 +0,0 @@
|
|||
ST-Ericsson COH 901 331 Real Time Clock
|
||||
|
||||
Required properties:
|
||||
- compatible: must be "stericsson,coh901331"
|
||||
- reg: address range of rtc register set.
|
||||
- interrupts: rtc alarm interrupt.
|
||||
- clocks: phandle to the rtc clock source
|
||||
|
||||
Example:
|
||||
rtc: rtc@c0017000 {
|
||||
compatible = "stericsson,coh901331";
|
||||
reg = <0xc0017000 0x1000>;
|
||||
interrupt-parent = <&vicb>;
|
||||
interrupts = <10>;
|
||||
clocks = <&rtc_clk>;
|
||||
};
|
||||
|
|
@ -1639,18 +1639,6 @@ config RTC_DRV_PS3
|
|||
This driver can also be built as a module. If so, the module
|
||||
will be called rtc-ps3.
|
||||
|
||||
config RTC_DRV_COH901331
|
||||
tristate "ST-Ericsson COH 901 331 RTC"
|
||||
depends on ARCH_U300 || COMPILE_TEST
|
||||
help
|
||||
If you say Y here you will get access to ST-Ericsson
|
||||
COH 901 331 RTC clock found in some ST-Ericsson Mobile
|
||||
Platforms.
|
||||
|
||||
This driver can also be built as a module. If so, the module
|
||||
will be called "rtc-coh901331".
|
||||
|
||||
|
||||
config RTC_DRV_STMP
|
||||
tristate "Freescale STMP3xxx/i.MX23/i.MX28 RTC"
|
||||
depends on ARCH_MXS || COMPILE_TEST
|
||||
|
|
|
|||
|
|
@ -38,7 +38,6 @@ obj-$(CONFIG_RTC_DRV_BQ4802) += rtc-bq4802.o
|
|||
obj-$(CONFIG_RTC_DRV_BRCMSTB) += rtc-brcmstb-waketimer.o
|
||||
obj-$(CONFIG_RTC_DRV_CADENCE) += rtc-cadence.o
|
||||
obj-$(CONFIG_RTC_DRV_CMOS) += rtc-cmos.o
|
||||
obj-$(CONFIG_RTC_DRV_COH901331) += rtc-coh901331.o
|
||||
obj-$(CONFIG_RTC_DRV_CPCAP) += rtc-cpcap.o
|
||||
obj-$(CONFIG_RTC_DRV_CROS_EC) += rtc-cros-ec.o
|
||||
obj-$(CONFIG_RTC_DRV_DA9052) += rtc-da9052.o
|
||||
|
|
|
|||
|
|
@ -1,290 +0,0 @@
|
|||
// SPDX-License-Identifier: GPL-2.0
|
||||
/*
|
||||
* Copyright (C) 2007-2009 ST-Ericsson AB
|
||||
* Real Time Clock interface for ST-Ericsson AB COH 901 331 RTC.
|
||||
* Author: Linus Walleij <linus.walleij@stericsson.com>
|
||||
* Based on rtc-pl031.c by Deepak Saxena <dsaxena@plexity.net>
|
||||
* Copyright 2006 (c) MontaVista Software, Inc.
|
||||
*/
|
||||
#include <linux/init.h>
|
||||
#include <linux/module.h>
|
||||
#include <linux/mod_devicetable.h>
|
||||
#include <linux/rtc.h>
|
||||
#include <linux/clk.h>
|
||||
#include <linux/interrupt.h>
|
||||
#include <linux/pm.h>
|
||||
#include <linux/platform_device.h>
|
||||
#include <linux/io.h>
|
||||
#include <linux/slab.h>
|
||||
|
||||
/*
|
||||
* Registers in the COH 901 331
|
||||
*/
|
||||
/* Alarm value 32bit (R/W) */
|
||||
#define COH901331_ALARM 0x00U
|
||||
/* Used to set current time 32bit (R/W) */
|
||||
#define COH901331_SET_TIME 0x04U
|
||||
/* Indication if current time is valid 32bit (R/-) */
|
||||
#define COH901331_VALID 0x08U
|
||||
/* Read the current time 32bit (R/-) */
|
||||
#define COH901331_CUR_TIME 0x0cU
|
||||
/* Event register for the "alarm" interrupt */
|
||||
#define COH901331_IRQ_EVENT 0x10U
|
||||
/* Mask register for the "alarm" interrupt */
|
||||
#define COH901331_IRQ_MASK 0x14U
|
||||
/* Force register for the "alarm" interrupt */
|
||||
#define COH901331_IRQ_FORCE 0x18U
|
||||
|
||||
/*
|
||||
* Reference to RTC block clock
|
||||
* Notice that the frequent clk_enable()/clk_disable() on this
|
||||
* clock is mainly to be able to turn on/off other clocks in the
|
||||
* hierarchy as needed, the RTC clock is always on anyway.
|
||||
*/
|
||||
struct coh901331_port {
|
||||
struct rtc_device *rtc;
|
||||
struct clk *clk;
|
||||
void __iomem *virtbase;
|
||||
int irq;
|
||||
#ifdef CONFIG_PM_SLEEP
|
||||
u32 irqmaskstore;
|
||||
#endif
|
||||
};
|
||||
|
||||
static irqreturn_t coh901331_interrupt(int irq, void *data)
|
||||
{
|
||||
struct coh901331_port *rtap = data;
|
||||
|
||||
clk_enable(rtap->clk);
|
||||
/* Ack IRQ */
|
||||
writel(1, rtap->virtbase + COH901331_IRQ_EVENT);
|
||||
/*
|
||||
* Disable the interrupt. This is necessary because
|
||||
* the RTC lives on a lower-clocked line and will
|
||||
* not release the IRQ line until after a few (slower)
|
||||
* clock cycles. The interrupt will be re-enabled when
|
||||
* a new alarm is set anyway.
|
||||
*/
|
||||
writel(0, rtap->virtbase + COH901331_IRQ_MASK);
|
||||
clk_disable(rtap->clk);
|
||||
|
||||
/* Set alarm flag */
|
||||
rtc_update_irq(rtap->rtc, 1, RTC_AF);
|
||||
|
||||
return IRQ_HANDLED;
|
||||
}
|
||||
|
||||
static int coh901331_read_time(struct device *dev, struct rtc_time *tm)
|
||||
{
|
||||
struct coh901331_port *rtap = dev_get_drvdata(dev);
|
||||
|
||||
clk_enable(rtap->clk);
|
||||
/* Check if the time is valid */
|
||||
if (!readl(rtap->virtbase + COH901331_VALID)) {
|
||||
clk_disable(rtap->clk);
|
||||
return -EINVAL;
|
||||
}
|
||||
|
||||
rtc_time64_to_tm(readl(rtap->virtbase + COH901331_CUR_TIME), tm);
|
||||
clk_disable(rtap->clk);
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int coh901331_set_time(struct device *dev, struct rtc_time *tm)
|
||||
{
|
||||
struct coh901331_port *rtap = dev_get_drvdata(dev);
|
||||
|
||||
clk_enable(rtap->clk);
|
||||
writel(rtc_tm_to_time64(tm), rtap->virtbase + COH901331_SET_TIME);
|
||||
clk_disable(rtap->clk);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int coh901331_read_alarm(struct device *dev, struct rtc_wkalrm *alarm)
|
||||
{
|
||||
struct coh901331_port *rtap = dev_get_drvdata(dev);
|
||||
|
||||
clk_enable(rtap->clk);
|
||||
rtc_time64_to_tm(readl(rtap->virtbase + COH901331_ALARM), &alarm->time);
|
||||
alarm->pending = readl(rtap->virtbase + COH901331_IRQ_EVENT) & 1U;
|
||||
alarm->enabled = readl(rtap->virtbase + COH901331_IRQ_MASK) & 1U;
|
||||
clk_disable(rtap->clk);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int coh901331_set_alarm(struct device *dev, struct rtc_wkalrm *alarm)
|
||||
{
|
||||
struct coh901331_port *rtap = dev_get_drvdata(dev);
|
||||
unsigned long time = rtc_tm_to_time64(&alarm->time);
|
||||
|
||||
clk_enable(rtap->clk);
|
||||
writel(time, rtap->virtbase + COH901331_ALARM);
|
||||
writel(alarm->enabled, rtap->virtbase + COH901331_IRQ_MASK);
|
||||
clk_disable(rtap->clk);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int coh901331_alarm_irq_enable(struct device *dev, unsigned int enabled)
|
||||
{
|
||||
struct coh901331_port *rtap = dev_get_drvdata(dev);
|
||||
|
||||
clk_enable(rtap->clk);
|
||||
if (enabled)
|
||||
writel(1, rtap->virtbase + COH901331_IRQ_MASK);
|
||||
else
|
||||
writel(0, rtap->virtbase + COH901331_IRQ_MASK);
|
||||
clk_disable(rtap->clk);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static const struct rtc_class_ops coh901331_ops = {
|
||||
.read_time = coh901331_read_time,
|
||||
.set_time = coh901331_set_time,
|
||||
.read_alarm = coh901331_read_alarm,
|
||||
.set_alarm = coh901331_set_alarm,
|
||||
.alarm_irq_enable = coh901331_alarm_irq_enable,
|
||||
};
|
||||
|
||||
static int __exit coh901331_remove(struct platform_device *pdev)
|
||||
{
|
||||
struct coh901331_port *rtap = platform_get_drvdata(pdev);
|
||||
|
||||
if (rtap)
|
||||
clk_unprepare(rtap->clk);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
|
||||
static int __init coh901331_probe(struct platform_device *pdev)
|
||||
{
|
||||
int ret;
|
||||
struct coh901331_port *rtap;
|
||||
|
||||
rtap = devm_kzalloc(&pdev->dev,
|
||||
sizeof(struct coh901331_port), GFP_KERNEL);
|
||||
if (!rtap)
|
||||
return -ENOMEM;
|
||||
|
||||
rtap->virtbase = devm_platform_ioremap_resource(pdev, 0);
|
||||
if (IS_ERR(rtap->virtbase))
|
||||
return PTR_ERR(rtap->virtbase);
|
||||
|
||||
rtap->irq = platform_get_irq(pdev, 0);
|
||||
if (devm_request_irq(&pdev->dev, rtap->irq, coh901331_interrupt, 0,
|
||||
"RTC COH 901 331 Alarm", rtap))
|
||||
return -EIO;
|
||||
|
||||
rtap->clk = devm_clk_get(&pdev->dev, NULL);
|
||||
if (IS_ERR(rtap->clk)) {
|
||||
ret = PTR_ERR(rtap->clk);
|
||||
dev_err(&pdev->dev, "could not get clock\n");
|
||||
return ret;
|
||||
}
|
||||
|
||||
rtap->rtc = devm_rtc_allocate_device(&pdev->dev);
|
||||
if (IS_ERR(rtap->rtc))
|
||||
return PTR_ERR(rtap->rtc);
|
||||
|
||||
rtap->rtc->ops = &coh901331_ops;
|
||||
rtap->rtc->range_max = U32_MAX;
|
||||
|
||||
/* We enable/disable the clock only to assure it works */
|
||||
ret = clk_prepare_enable(rtap->clk);
|
||||
if (ret) {
|
||||
dev_err(&pdev->dev, "could not enable clock\n");
|
||||
return ret;
|
||||
}
|
||||
clk_disable(rtap->clk);
|
||||
|
||||
platform_set_drvdata(pdev, rtap);
|
||||
|
||||
ret = devm_rtc_register_device(rtap->rtc);
|
||||
if (ret)
|
||||
goto out_no_rtc;
|
||||
|
||||
return 0;
|
||||
|
||||
out_no_rtc:
|
||||
clk_unprepare(rtap->clk);
|
||||
return ret;
|
||||
}
|
||||
|
||||
#ifdef CONFIG_PM_SLEEP
|
||||
static int coh901331_suspend(struct device *dev)
|
||||
{
|
||||
struct coh901331_port *rtap = dev_get_drvdata(dev);
|
||||
|
||||
/*
|
||||
* If this RTC alarm will be used for waking the system up,
|
||||
* don't disable it of course. Else we just disable the alarm
|
||||
* and await suspension.
|
||||
*/
|
||||
if (device_may_wakeup(dev)) {
|
||||
enable_irq_wake(rtap->irq);
|
||||
} else {
|
||||
clk_enable(rtap->clk);
|
||||
rtap->irqmaskstore = readl(rtap->virtbase + COH901331_IRQ_MASK);
|
||||
writel(0, rtap->virtbase + COH901331_IRQ_MASK);
|
||||
clk_disable(rtap->clk);
|
||||
}
|
||||
clk_unprepare(rtap->clk);
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int coh901331_resume(struct device *dev)
|
||||
{
|
||||
int ret;
|
||||
struct coh901331_port *rtap = dev_get_drvdata(dev);
|
||||
|
||||
ret = clk_prepare(rtap->clk);
|
||||
if (ret)
|
||||
return ret;
|
||||
|
||||
if (device_may_wakeup(dev)) {
|
||||
disable_irq_wake(rtap->irq);
|
||||
} else {
|
||||
clk_enable(rtap->clk);
|
||||
writel(rtap->irqmaskstore, rtap->virtbase + COH901331_IRQ_MASK);
|
||||
clk_disable(rtap->clk);
|
||||
}
|
||||
return 0;
|
||||
}
|
||||
#endif
|
||||
|
||||
static SIMPLE_DEV_PM_OPS(coh901331_pm_ops, coh901331_suspend, coh901331_resume);
|
||||
|
||||
static void coh901331_shutdown(struct platform_device *pdev)
|
||||
{
|
||||
struct coh901331_port *rtap = platform_get_drvdata(pdev);
|
||||
|
||||
clk_enable(rtap->clk);
|
||||
writel(0, rtap->virtbase + COH901331_IRQ_MASK);
|
||||
clk_disable_unprepare(rtap->clk);
|
||||
}
|
||||
|
||||
static const struct of_device_id coh901331_dt_match[] = {
|
||||
{ .compatible = "stericsson,coh901331" },
|
||||
{},
|
||||
};
|
||||
MODULE_DEVICE_TABLE(of, coh901331_dt_match);
|
||||
|
||||
static struct platform_driver coh901331_driver = {
|
||||
.driver = {
|
||||
.name = "rtc-coh901331",
|
||||
.pm = &coh901331_pm_ops,
|
||||
.of_match_table = coh901331_dt_match,
|
||||
},
|
||||
.remove = __exit_p(coh901331_remove),
|
||||
.shutdown = coh901331_shutdown,
|
||||
};
|
||||
|
||||
module_platform_driver_probe(coh901331_driver, coh901331_probe);
|
||||
|
||||
MODULE_AUTHOR("Linus Walleij <linus.walleij@stericsson.com>");
|
||||
MODULE_DESCRIPTION("ST-Ericsson AB COH 901 331 RTC Driver");
|
||||
MODULE_LICENSE("GPL");
|
||||
Loading…
Reference in a new issue