diff options
author | Arnd Bergmann <arnd@arndb.de> | 2021-01-20 18:41:57 +0300 |
---|---|---|
committer | Alexandre Belloni <alexandre.belloni@bootlin.com> | 2021-01-23 16:57:21 +0300 |
commit | dd2d3b40039d0278f25a21aa3e50955a01a92a62 (patch) | |
tree | 44865b7d24e9cd5ef98698d387cadf4768af2ecf /drivers/rtc | |
parent | 9d0735519f99948c5b5c22426b682ced7f7af9be (diff) | |
download | linux-dd2d3b40039d0278f25a21aa3e50955a01a92a62.tar.xz |
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
Diffstat (limited to 'drivers/rtc')
-rw-r--r-- | drivers/rtc/Kconfig | 12 | ||||
-rw-r--r-- | drivers/rtc/Makefile | 1 | ||||
-rw-r--r-- | drivers/rtc/rtc-coh901331.c | 290 |
3 files changed, 0 insertions, 303 deletions
diff --git a/drivers/rtc/Kconfig b/drivers/rtc/Kconfig index 12907352f697..38a25bbf3fe9 100644 --- a/drivers/rtc/Kconfig +++ b/drivers/rtc/Kconfig @@ -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 diff --git a/drivers/rtc/Makefile b/drivers/rtc/Makefile index 821643b3b699..9cb0e0e8fd28 100644 --- a/drivers/rtc/Makefile +++ b/drivers/rtc/Makefile @@ -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 diff --git a/drivers/rtc/rtc-coh901331.c b/drivers/rtc/rtc-coh901331.c deleted file mode 100644 index 168ced87d93a..000000000000 --- a/drivers/rtc/rtc-coh901331.c +++ /dev/null @@ -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"); |