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* [PATCH 04/16] watchdog: remove ks8695 driver
       [not found] <20190809202749.742267-1-arnd@arndb.de>
@ 2019-08-09 20:27 ` Arnd Bergmann
  2019-08-09 20:42   ` Guenter Roeck
  2019-08-09 20:27 ` [PATCH 06/16] watchdog: remove w90x900 driver Arnd Bergmann
  1 sibling, 1 reply; 6+ messages in thread
From: Arnd Bergmann @ 2019-08-09 20:27 UTC (permalink / raw)
  To: soc
  Cc: Arnd Bergmann, Wim Van Sebroeck, Guenter Roeck, Jonathan Corbet,
	linux-watchdog, linux-doc, linux-kernel

The platform is getting removed, so there are no remaining
users of this driver.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
---
 .../watchdog/watchdog-parameters.rst          |   9 -
 drivers/watchdog/Kconfig                      |   7 -
 drivers/watchdog/Makefile                     |   1 -
 drivers/watchdog/ks8695_wdt.c                 | 319 ------------------
 4 files changed, 336 deletions(-)
 delete mode 100644 drivers/watchdog/ks8695_wdt.c

diff --git a/Documentation/watchdog/watchdog-parameters.rst b/Documentation/watchdog/watchdog-parameters.rst
index a3985cc5aeda..226aba56f704 100644
--- a/Documentation/watchdog/watchdog-parameters.rst
+++ b/Documentation/watchdog/watchdog-parameters.rst
@@ -301,15 +301,6 @@ ixp4xx_wdt:
 
 -------------------------------------------------
 
-ks8695_wdt:
-    wdt_time:
-	Watchdog time in seconds. (default=5)
-    nowayout:
-	Watchdog cannot be stopped once started
-	(default=kernel config parameter)
-
--------------------------------------------------
-
 machzwd:
     nowayout:
 	Watchdog cannot be stopped once started
diff --git a/drivers/watchdog/Kconfig b/drivers/watchdog/Kconfig
index 8188963a405b..e631f1ae303a 100644
--- a/drivers/watchdog/Kconfig
+++ b/drivers/watchdog/Kconfig
@@ -477,13 +477,6 @@ config IXP4XX_WATCHDOG
 
 	  Say N if you are unsure.
 
-config KS8695_WATCHDOG
-	tristate "KS8695 watchdog"
-	depends on ARCH_KS8695
-	help
-	  Watchdog timer embedded into KS8695 processor. This will reboot your
-	  system when the timeout is reached.
-
 config HAVE_S3C2410_WATCHDOG
 	bool
 	help
diff --git a/drivers/watchdog/Makefile b/drivers/watchdog/Makefile
index 7caa920e7e60..85f55ec76f8d 100644
--- a/drivers/watchdog/Makefile
+++ b/drivers/watchdog/Makefile
@@ -49,7 +49,6 @@ obj-$(CONFIG_21285_WATCHDOG) += wdt285.o
 obj-$(CONFIG_977_WATCHDOG) += wdt977.o
 obj-$(CONFIG_FTWDT010_WATCHDOG) += ftwdt010_wdt.o
 obj-$(CONFIG_IXP4XX_WATCHDOG) += ixp4xx_wdt.o
-obj-$(CONFIG_KS8695_WATCHDOG) += ks8695_wdt.o
 obj-$(CONFIG_S3C2410_WATCHDOG) += s3c2410_wdt.o
 obj-$(CONFIG_SA1100_WATCHDOG) += sa1100_wdt.o
 obj-$(CONFIG_SAMA5D4_WATCHDOG) += sama5d4_wdt.o
diff --git a/drivers/watchdog/ks8695_wdt.c b/drivers/watchdog/ks8695_wdt.c
deleted file mode 100644
index 1550ce3c5702..000000000000
--- a/drivers/watchdog/ks8695_wdt.c
+++ /dev/null
@@ -1,319 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0-only
-/*
- * Watchdog driver for Kendin/Micrel KS8695.
- *
- * (C) 2007 Andrew Victor
- */
-
-#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
-
-#include <linux/bitops.h>
-#include <linux/errno.h>
-#include <linux/fs.h>
-#include <linux/init.h>
-#include <linux/kernel.h>
-#include <linux/miscdevice.h>
-#include <linux/module.h>
-#include <linux/moduleparam.h>
-#include <linux/platform_device.h>
-#include <linux/types.h>
-#include <linux/watchdog.h>
-#include <linux/io.h>
-#include <linux/uaccess.h>
-#include <mach/hardware.h>
-
-#define KS8695_TMR_OFFSET	(0xF0000 + 0xE400)
-#define KS8695_TMR_VA		(KS8695_IO_VA + KS8695_TMR_OFFSET)
-
-/*
- * Timer registers
- */
-#define KS8695_TMCON		(0x00)		/* Timer Control Register */
-#define KS8695_T0TC		(0x08)		/* Timer 0 Timeout Count Register */
-#define TMCON_T0EN		(1 << 0)	/* Timer 0 Enable */
-
-/* Timer0 Timeout Counter Register */
-#define T0TC_WATCHDOG		(0xff)		/* Enable watchdog mode */
-
-#define WDT_DEFAULT_TIME	5	/* seconds */
-#define WDT_MAX_TIME		171	/* seconds */
-
-static int wdt_time = WDT_DEFAULT_TIME;
-static bool nowayout = WATCHDOG_NOWAYOUT;
-
-module_param(wdt_time, int, 0);
-MODULE_PARM_DESC(wdt_time, "Watchdog time in seconds. (default="
-					__MODULE_STRING(WDT_DEFAULT_TIME) ")");
-
-#ifdef CONFIG_WATCHDOG_NOWAYOUT
-module_param(nowayout, bool, 0);
-MODULE_PARM_DESC(nowayout, "Watchdog cannot be stopped once started (default="
-				__MODULE_STRING(WATCHDOG_NOWAYOUT) ")");
-#endif
-
-
-static unsigned long ks8695wdt_busy;
-static DEFINE_SPINLOCK(ks8695_lock);
-
-/* ......................................................................... */
-
-/*
- * Disable the watchdog.
- */
-static inline void ks8695_wdt_stop(void)
-{
-	unsigned long tmcon;
-
-	spin_lock(&ks8695_lock);
-	/* disable timer0 */
-	tmcon = __raw_readl(KS8695_TMR_VA + KS8695_TMCON);
-	__raw_writel(tmcon & ~TMCON_T0EN, KS8695_TMR_VA + KS8695_TMCON);
-	spin_unlock(&ks8695_lock);
-}
-
-/*
- * Enable and reset the watchdog.
- */
-static inline void ks8695_wdt_start(void)
-{
-	unsigned long tmcon;
-	unsigned long tval = wdt_time * KS8695_CLOCK_RATE;
-
-	spin_lock(&ks8695_lock);
-	/* disable timer0 */
-	tmcon = __raw_readl(KS8695_TMR_VA + KS8695_TMCON);
-	__raw_writel(tmcon & ~TMCON_T0EN, KS8695_TMR_VA + KS8695_TMCON);
-
-	/* program timer0 */
-	__raw_writel(tval | T0TC_WATCHDOG, KS8695_TMR_VA + KS8695_T0TC);
-
-	/* re-enable timer0 */
-	tmcon = __raw_readl(KS8695_TMR_VA + KS8695_TMCON);
-	__raw_writel(tmcon | TMCON_T0EN, KS8695_TMR_VA + KS8695_TMCON);
-	spin_unlock(&ks8695_lock);
-}
-
-/*
- * Reload the watchdog timer.  (ie, pat the watchdog)
- */
-static inline void ks8695_wdt_reload(void)
-{
-	unsigned long tmcon;
-
-	spin_lock(&ks8695_lock);
-	/* disable, then re-enable timer0 */
-	tmcon = __raw_readl(KS8695_TMR_VA + KS8695_TMCON);
-	__raw_writel(tmcon & ~TMCON_T0EN, KS8695_TMR_VA + KS8695_TMCON);
-	__raw_writel(tmcon | TMCON_T0EN, KS8695_TMR_VA + KS8695_TMCON);
-	spin_unlock(&ks8695_lock);
-}
-
-/*
- * Change the watchdog time interval.
- */
-static int ks8695_wdt_settimeout(int new_time)
-{
-	/*
-	 * All counting occurs at KS8695_CLOCK_RATE / 128 = 0.256 Hz
-	 *
-	 * Since WDV is a 16-bit counter, the maximum period is
-	 * 65536 / 0.256 = 256 seconds.
-	 */
-	if ((new_time <= 0) || (new_time > WDT_MAX_TIME))
-		return -EINVAL;
-
-	/* Set new watchdog time. It will be used when
-	   ks8695_wdt_start() is called. */
-	wdt_time = new_time;
-	return 0;
-}
-
-/* ......................................................................... */
-
-/*
- * Watchdog device is opened, and watchdog starts running.
- */
-static int ks8695_wdt_open(struct inode *inode, struct file *file)
-{
-	if (test_and_set_bit(0, &ks8695wdt_busy))
-		return -EBUSY;
-
-	ks8695_wdt_start();
-	return stream_open(inode, file);
-}
-
-/*
- * Close the watchdog device.
- * If CONFIG_WATCHDOG_NOWAYOUT is NOT defined then the watchdog is also
- *  disabled.
- */
-static int ks8695_wdt_close(struct inode *inode, struct file *file)
-{
-	/* Disable the watchdog when file is closed */
-	if (!nowayout)
-		ks8695_wdt_stop();
-	clear_bit(0, &ks8695wdt_busy);
-	return 0;
-}
-
-static const struct watchdog_info ks8695_wdt_info = {
-	.identity	= "ks8695 watchdog",
-	.options	= WDIOF_SETTIMEOUT | WDIOF_KEEPALIVEPING,
-};
-
-/*
- * Handle commands from user-space.
- */
-static long ks8695_wdt_ioctl(struct file *file, unsigned int cmd,
-							unsigned long arg)
-{
-	void __user *argp = (void __user *)arg;
-	int __user *p = argp;
-	int new_value;
-
-	switch (cmd) {
-	case WDIOC_GETSUPPORT:
-		return copy_to_user(argp, &ks8695_wdt_info,
-					sizeof(ks8695_wdt_info)) ? -EFAULT : 0;
-	case WDIOC_GETSTATUS:
-	case WDIOC_GETBOOTSTATUS:
-		return put_user(0, p);
-	case WDIOC_SETOPTIONS:
-		if (get_user(new_value, p))
-			return -EFAULT;
-		if (new_value & WDIOS_DISABLECARD)
-			ks8695_wdt_stop();
-		if (new_value & WDIOS_ENABLECARD)
-			ks8695_wdt_start();
-		return 0;
-	case WDIOC_KEEPALIVE:
-		ks8695_wdt_reload();	/* pat the watchdog */
-		return 0;
-	case WDIOC_SETTIMEOUT:
-		if (get_user(new_value, p))
-			return -EFAULT;
-		if (ks8695_wdt_settimeout(new_value))
-			return -EINVAL;
-		/* Enable new time value */
-		ks8695_wdt_start();
-		/* Return current value */
-		return put_user(wdt_time, p);
-	case WDIOC_GETTIMEOUT:
-		return put_user(wdt_time, p);
-	default:
-		return -ENOTTY;
-	}
-}
-
-/*
- * Pat the watchdog whenever device is written to.
- */
-static ssize_t ks8695_wdt_write(struct file *file, const char *data,
-						size_t len, loff_t *ppos)
-{
-	ks8695_wdt_reload();		/* pat the watchdog */
-	return len;
-}
-
-/* ......................................................................... */
-
-static const struct file_operations ks8695wdt_fops = {
-	.owner		= THIS_MODULE,
-	.llseek		= no_llseek,
-	.unlocked_ioctl	= ks8695_wdt_ioctl,
-	.open		= ks8695_wdt_open,
-	.release	= ks8695_wdt_close,
-	.write		= ks8695_wdt_write,
-};
-
-static struct miscdevice ks8695wdt_miscdev = {
-	.minor		= WATCHDOG_MINOR,
-	.name		= "watchdog",
-	.fops		= &ks8695wdt_fops,
-};
-
-static int ks8695wdt_probe(struct platform_device *pdev)
-{
-	int res;
-
-	if (ks8695wdt_miscdev.parent)
-		return -EBUSY;
-	ks8695wdt_miscdev.parent = &pdev->dev;
-
-	res = misc_register(&ks8695wdt_miscdev);
-	if (res)
-		return res;
-
-	pr_info("KS8695 Watchdog Timer enabled (%d seconds%s)\n",
-		wdt_time, nowayout ? ", nowayout" : "");
-	return 0;
-}
-
-static int ks8695wdt_remove(struct platform_device *pdev)
-{
-	misc_deregister(&ks8695wdt_miscdev);
-	ks8695wdt_miscdev.parent = NULL;
-
-	return 0;
-}
-
-static void ks8695wdt_shutdown(struct platform_device *pdev)
-{
-	ks8695_wdt_stop();
-}
-
-#ifdef CONFIG_PM
-
-static int ks8695wdt_suspend(struct platform_device *pdev, pm_message_t message)
-{
-	ks8695_wdt_stop();
-	return 0;
-}
-
-static int ks8695wdt_resume(struct platform_device *pdev)
-{
-	if (ks8695wdt_busy)
-		ks8695_wdt_start();
-	return 0;
-}
-
-#else
-#define ks8695wdt_suspend NULL
-#define ks8695wdt_resume	NULL
-#endif
-
-static struct platform_driver ks8695wdt_driver = {
-	.probe		= ks8695wdt_probe,
-	.remove		= ks8695wdt_remove,
-	.shutdown	= ks8695wdt_shutdown,
-	.suspend	= ks8695wdt_suspend,
-	.resume		= ks8695wdt_resume,
-	.driver		= {
-		.name	= "ks8695_wdt",
-	},
-};
-
-static int __init ks8695_wdt_init(void)
-{
-	/* Check that the heartbeat value is within range;
-	   if not reset to the default */
-	if (ks8695_wdt_settimeout(wdt_time)) {
-		ks8695_wdt_settimeout(WDT_DEFAULT_TIME);
-		pr_info("ks8695_wdt: wdt_time value must be 1 <= wdt_time <= %i"
-					", using %d\n", wdt_time, WDT_MAX_TIME);
-	}
-	return platform_driver_register(&ks8695wdt_driver);
-}
-
-static void __exit ks8695_wdt_exit(void)
-{
-	platform_driver_unregister(&ks8695wdt_driver);
-}
-
-module_init(ks8695_wdt_init);
-module_exit(ks8695_wdt_exit);
-
-MODULE_AUTHOR("Andrew Victor");
-MODULE_DESCRIPTION("Watchdog driver for KS8695");
-MODULE_LICENSE("GPL");
-MODULE_ALIAS("platform:ks8695_wdt");
-- 
2.20.0


^ permalink raw reply	[flat|nested] 6+ messages in thread

* [PATCH 06/16] watchdog: remove w90x900 driver
       [not found] <20190809202749.742267-1-arnd@arndb.de>
  2019-08-09 20:27 ` [PATCH 04/16] watchdog: remove ks8695 driver Arnd Bergmann
@ 2019-08-09 20:27 ` Arnd Bergmann
  2019-08-09 20:42   ` Guenter Roeck
  1 sibling, 1 reply; 6+ messages in thread
From: Arnd Bergmann @ 2019-08-09 20:27 UTC (permalink / raw)
  To: soc
  Cc: Arnd Bergmann, Wim Van Sebroeck, Guenter Roeck, Jonathan Corbet,
	linux-watchdog, linux-doc, linux-kernel

The ARM w90x900 platform is getting removed, so this driver is obsolete

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
---
 .../watchdog/watchdog-parameters.rst          |  10 -
 drivers/watchdog/Kconfig                      |   9 -
 drivers/watchdog/Makefile                     |   1 -
 drivers/watchdog/nuc900_wdt.c                 | 302 ------------------
 4 files changed, 322 deletions(-)
 delete mode 100644 drivers/watchdog/nuc900_wdt.c

diff --git a/Documentation/watchdog/watchdog-parameters.rst b/Documentation/watchdog/watchdog-parameters.rst
index 226aba56f704..223c99361a30 100644
--- a/Documentation/watchdog/watchdog-parameters.rst
+++ b/Documentation/watchdog/watchdog-parameters.rst
@@ -366,16 +366,6 @@ nic7018_wdt:
 
 -------------------------------------------------
 
-nuc900_wdt:
-    heartbeat:
-	Watchdog heartbeats in seconds.
-	(default = 15)
-    nowayout:
-	Watchdog cannot be stopped once started
-	(default=kernel config parameter)
-
--------------------------------------------------
-
 omap_wdt:
     timer_margin:
 	initial watchdog timeout (in seconds)
diff --git a/drivers/watchdog/Kconfig b/drivers/watchdog/Kconfig
index e631f1ae303a..0e64f501ef30 100644
--- a/drivers/watchdog/Kconfig
+++ b/drivers/watchdog/Kconfig
@@ -655,15 +655,6 @@ config STMP3XXX_RTC_WATCHDOG
 	  To compile this driver as a module, choose M here: the
 	  module will be called stmp3xxx_rtc_wdt.
 
-config NUC900_WATCHDOG
-	tristate "Nuvoton NUC900 watchdog"
-	depends on ARCH_W90X900 || COMPILE_TEST
-	help
-	  Say Y here if to include support for the watchdog timer
-	  for the Nuvoton NUC900 series SoCs.
-	  To compile this driver as a module, choose M here: the
-	  module will be called nuc900_wdt.
-
 config TS4800_WATCHDOG
 	tristate "TS-4800 Watchdog"
 	depends on HAS_IOMEM && OF
diff --git a/drivers/watchdog/Makefile b/drivers/watchdog/Makefile
index 85f55ec76f8d..b5a0aed537af 100644
--- a/drivers/watchdog/Makefile
+++ b/drivers/watchdog/Makefile
@@ -63,7 +63,6 @@ obj-$(CONFIG_RN5T618_WATCHDOG) += rn5t618_wdt.o
 obj-$(CONFIG_COH901327_WATCHDOG) += coh901327_wdt.o
 obj-$(CONFIG_NPCM7XX_WATCHDOG) += npcm_wdt.o
 obj-$(CONFIG_STMP3XXX_RTC_WATCHDOG) += stmp3xxx_rtc_wdt.o
-obj-$(CONFIG_NUC900_WATCHDOG) += nuc900_wdt.o
 obj-$(CONFIG_TS4800_WATCHDOG) += ts4800_wdt.o
 obj-$(CONFIG_TS72XX_WATCHDOG) += ts72xx_wdt.o
 obj-$(CONFIG_IMX2_WDT) += imx2_wdt.o
diff --git a/drivers/watchdog/nuc900_wdt.c b/drivers/watchdog/nuc900_wdt.c
deleted file mode 100644
index db124cebe838..000000000000
--- a/drivers/watchdog/nuc900_wdt.c
+++ /dev/null
@@ -1,302 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0-only
-/*
- * Copyright (c) 2009 Nuvoton technology corporation.
- *
- * Wan ZongShun <mcuos.com@gmail.com>
- */
-
-#include <linux/bitops.h>
-#include <linux/errno.h>
-#include <linux/fs.h>
-#include <linux/io.h>
-#include <linux/clk.h>
-#include <linux/kernel.h>
-#include <linux/miscdevice.h>
-#include <linux/module.h>
-#include <linux/moduleparam.h>
-#include <linux/platform_device.h>
-#include <linux/slab.h>
-#include <linux/interrupt.h>
-#include <linux/types.h>
-#include <linux/watchdog.h>
-#include <linux/uaccess.h>
-
-#define REG_WTCR		0x1c
-#define WTCLK			(0x01 << 10)
-#define WTE			(0x01 << 7)	/*wdt enable*/
-#define WTIS			(0x03 << 4)
-#define WTIF			(0x01 << 3)
-#define WTRF			(0x01 << 2)
-#define WTRE			(0x01 << 1)
-#define WTR			(0x01 << 0)
-/*
- * The watchdog time interval can be calculated via following formula:
- * WTIS		real time interval (formula)
- * 0x00		((2^ 14 ) * ((external crystal freq) / 256))seconds
- * 0x01		((2^ 16 ) * ((external crystal freq) / 256))seconds
- * 0x02		((2^ 18 ) * ((external crystal freq) / 256))seconds
- * 0x03		((2^ 20 ) * ((external crystal freq) / 256))seconds
- *
- * The external crystal freq is 15Mhz in the nuc900 evaluation board.
- * So 0x00 = +-0.28 seconds, 0x01 = +-1.12 seconds, 0x02 = +-4.48 seconds,
- * 0x03 = +- 16.92 seconds..
- */
-#define WDT_HW_TIMEOUT		0x02
-#define WDT_TIMEOUT		(HZ/2)
-#define WDT_HEARTBEAT		15
-
-static int heartbeat = WDT_HEARTBEAT;
-module_param(heartbeat, int, 0);
-MODULE_PARM_DESC(heartbeat, "Watchdog heartbeats in seconds. "
-	"(default = " __MODULE_STRING(WDT_HEARTBEAT) ")");
-
-static bool nowayout = WATCHDOG_NOWAYOUT;
-module_param(nowayout, bool, 0);
-MODULE_PARM_DESC(nowayout, "Watchdog cannot be stopped once started "
-	"(default=" __MODULE_STRING(WATCHDOG_NOWAYOUT) ")");
-
-struct nuc900_wdt {
-	struct clk	 *wdt_clock;
-	struct platform_device *pdev;
-	void __iomem	 *wdt_base;
-	char		 expect_close;
-	struct timer_list timer;
-	spinlock_t       wdt_lock;
-	unsigned long next_heartbeat;
-};
-
-static unsigned long nuc900wdt_busy;
-static struct nuc900_wdt *nuc900_wdt;
-
-static inline void nuc900_wdt_keepalive(void)
-{
-	unsigned int val;
-
-	spin_lock(&nuc900_wdt->wdt_lock);
-
-	val = __raw_readl(nuc900_wdt->wdt_base + REG_WTCR);
-	val |= (WTR | WTIF);
-	__raw_writel(val, nuc900_wdt->wdt_base + REG_WTCR);
-
-	spin_unlock(&nuc900_wdt->wdt_lock);
-}
-
-static inline void nuc900_wdt_start(void)
-{
-	unsigned int val;
-
-	spin_lock(&nuc900_wdt->wdt_lock);
-
-	val = __raw_readl(nuc900_wdt->wdt_base + REG_WTCR);
-	val |= (WTRE | WTE | WTR | WTCLK | WTIF);
-	val &= ~WTIS;
-	val |= (WDT_HW_TIMEOUT << 0x04);
-	__raw_writel(val, nuc900_wdt->wdt_base + REG_WTCR);
-
-	spin_unlock(&nuc900_wdt->wdt_lock);
-
-	nuc900_wdt->next_heartbeat = jiffies + heartbeat * HZ;
-	mod_timer(&nuc900_wdt->timer, jiffies + WDT_TIMEOUT);
-}
-
-static inline void nuc900_wdt_stop(void)
-{
-	unsigned int val;
-
-	del_timer(&nuc900_wdt->timer);
-
-	spin_lock(&nuc900_wdt->wdt_lock);
-
-	val = __raw_readl(nuc900_wdt->wdt_base + REG_WTCR);
-	val &= ~WTE;
-	__raw_writel(val, nuc900_wdt->wdt_base + REG_WTCR);
-
-	spin_unlock(&nuc900_wdt->wdt_lock);
-}
-
-static inline void nuc900_wdt_ping(void)
-{
-	nuc900_wdt->next_heartbeat = jiffies + heartbeat * HZ;
-}
-
-static int nuc900_wdt_open(struct inode *inode, struct file *file)
-{
-
-	if (test_and_set_bit(0, &nuc900wdt_busy))
-		return -EBUSY;
-
-	nuc900_wdt_start();
-
-	return stream_open(inode, file);
-}
-
-static int nuc900_wdt_close(struct inode *inode, struct file *file)
-{
-	if (nuc900_wdt->expect_close == 42)
-		nuc900_wdt_stop();
-	else {
-		dev_crit(&nuc900_wdt->pdev->dev,
-			"Unexpected close, not stopping watchdog!\n");
-		nuc900_wdt_ping();
-	}
-
-	nuc900_wdt->expect_close = 0;
-	clear_bit(0, &nuc900wdt_busy);
-	return 0;
-}
-
-static const struct watchdog_info nuc900_wdt_info = {
-	.identity	= "nuc900 watchdog",
-	.options	= WDIOF_SETTIMEOUT | WDIOF_KEEPALIVEPING |
-						WDIOF_MAGICCLOSE,
-};
-
-static long nuc900_wdt_ioctl(struct file *file,
-					unsigned int cmd, unsigned long arg)
-{
-	void __user *argp = (void __user *)arg;
-	int __user *p = argp;
-	int new_value;
-
-	switch (cmd) {
-	case WDIOC_GETSUPPORT:
-		return copy_to_user(argp, &nuc900_wdt_info,
-				sizeof(nuc900_wdt_info)) ? -EFAULT : 0;
-	case WDIOC_GETSTATUS:
-	case WDIOC_GETBOOTSTATUS:
-		return put_user(0, p);
-
-	case WDIOC_KEEPALIVE:
-		nuc900_wdt_ping();
-		return 0;
-
-	case WDIOC_SETTIMEOUT:
-		if (get_user(new_value, p))
-			return -EFAULT;
-
-		heartbeat = new_value;
-		nuc900_wdt_ping();
-
-		return put_user(new_value, p);
-	case WDIOC_GETTIMEOUT:
-		return put_user(heartbeat, p);
-	default:
-		return -ENOTTY;
-	}
-}
-
-static ssize_t nuc900_wdt_write(struct file *file, const char __user *data,
-						size_t len, loff_t *ppos)
-{
-	if (!len)
-		return 0;
-
-	/* Scan for magic character */
-	if (!nowayout) {
-		size_t i;
-
-		nuc900_wdt->expect_close = 0;
-
-		for (i = 0; i < len; i++) {
-			char c;
-			if (get_user(c, data + i))
-				return -EFAULT;
-			if (c == 'V') {
-				nuc900_wdt->expect_close = 42;
-				break;
-			}
-		}
-	}
-
-	nuc900_wdt_ping();
-	return len;
-}
-
-static void nuc900_wdt_timer_ping(struct timer_list *unused)
-{
-	if (time_before(jiffies, nuc900_wdt->next_heartbeat)) {
-		nuc900_wdt_keepalive();
-		mod_timer(&nuc900_wdt->timer, jiffies + WDT_TIMEOUT);
-	} else
-		dev_warn(&nuc900_wdt->pdev->dev, "Will reset the machine !\n");
-}
-
-static const struct file_operations nuc900wdt_fops = {
-	.owner		= THIS_MODULE,
-	.llseek		= no_llseek,
-	.unlocked_ioctl	= nuc900_wdt_ioctl,
-	.open		= nuc900_wdt_open,
-	.release	= nuc900_wdt_close,
-	.write		= nuc900_wdt_write,
-};
-
-static struct miscdevice nuc900wdt_miscdev = {
-	.minor		= WATCHDOG_MINOR,
-	.name		= "watchdog",
-	.fops		= &nuc900wdt_fops,
-};
-
-static int nuc900wdt_probe(struct platform_device *pdev)
-{
-	int ret = 0;
-
-	nuc900_wdt = devm_kzalloc(&pdev->dev, sizeof(*nuc900_wdt),
-				GFP_KERNEL);
-	if (!nuc900_wdt)
-		return -ENOMEM;
-
-	nuc900_wdt->pdev = pdev;
-
-	spin_lock_init(&nuc900_wdt->wdt_lock);
-
-	nuc900_wdt->wdt_base = devm_platform_ioremap_resource(pdev, 0);
-	if (IS_ERR(nuc900_wdt->wdt_base))
-		return PTR_ERR(nuc900_wdt->wdt_base);
-
-	nuc900_wdt->wdt_clock = devm_clk_get(&pdev->dev, NULL);
-	if (IS_ERR(nuc900_wdt->wdt_clock)) {
-		dev_err(&pdev->dev, "failed to find watchdog clock source\n");
-		return PTR_ERR(nuc900_wdt->wdt_clock);
-	}
-
-	clk_enable(nuc900_wdt->wdt_clock);
-
-	timer_setup(&nuc900_wdt->timer, nuc900_wdt_timer_ping, 0);
-
-	ret = misc_register(&nuc900wdt_miscdev);
-	if (ret) {
-		dev_err(&pdev->dev, "err register miscdev on minor=%d (%d)\n",
-			WATCHDOG_MINOR, ret);
-		goto err_clk;
-	}
-
-	return 0;
-
-err_clk:
-	clk_disable(nuc900_wdt->wdt_clock);
-	return ret;
-}
-
-static int nuc900wdt_remove(struct platform_device *pdev)
-{
-	misc_deregister(&nuc900wdt_miscdev);
-
-	clk_disable(nuc900_wdt->wdt_clock);
-
-	return 0;
-}
-
-static struct platform_driver nuc900wdt_driver = {
-	.probe		= nuc900wdt_probe,
-	.remove		= nuc900wdt_remove,
-	.driver		= {
-		.name	= "nuc900-wdt",
-	},
-};
-
-module_platform_driver(nuc900wdt_driver);
-
-MODULE_AUTHOR("Wan ZongShun <mcuos.com@gmail.com>");
-MODULE_DESCRIPTION("Watchdog driver for NUC900");
-MODULE_LICENSE("GPL");
-MODULE_ALIAS("platform:nuc900-wdt");
-- 
2.20.0


^ permalink raw reply	[flat|nested] 6+ messages in thread

* Re: [PATCH 04/16] watchdog: remove ks8695 driver
  2019-08-09 20:27 ` [PATCH 04/16] watchdog: remove ks8695 driver Arnd Bergmann
@ 2019-08-09 20:42   ` Guenter Roeck
  2019-08-10  8:37     ` Arnd Bergmann
  0 siblings, 1 reply; 6+ messages in thread
From: Guenter Roeck @ 2019-08-09 20:42 UTC (permalink / raw)
  To: Arnd Bergmann
  Cc: soc, Wim Van Sebroeck, Jonathan Corbet, linux-watchdog,
	linux-doc, linux-kernel

On Fri, Aug 09, 2019 at 10:27:32PM +0200, Arnd Bergmann wrote:
> The platform is getting removed, so there are no remaining
> users of this driver.
> 
> Signed-off-by: Arnd Bergmann <arnd@arndb.de>

Acked-by: Guenter Roeck <linux@roeck-us.net>

Please let me know if this should be applied through the watchdog tree.
For now I'll assume it will be applied together with the rest of the
series.

> ---
>  .../watchdog/watchdog-parameters.rst          |   9 -
>  drivers/watchdog/Kconfig                      |   7 -
>  drivers/watchdog/Makefile                     |   1 -
>  drivers/watchdog/ks8695_wdt.c                 | 319 ------------------
>  4 files changed, 336 deletions(-)
>  delete mode 100644 drivers/watchdog/ks8695_wdt.c
> 
> diff --git a/Documentation/watchdog/watchdog-parameters.rst b/Documentation/watchdog/watchdog-parameters.rst
> index a3985cc5aeda..226aba56f704 100644
> --- a/Documentation/watchdog/watchdog-parameters.rst
> +++ b/Documentation/watchdog/watchdog-parameters.rst
> @@ -301,15 +301,6 @@ ixp4xx_wdt:
>  
>  -------------------------------------------------
>  
> -ks8695_wdt:
> -    wdt_time:
> -	Watchdog time in seconds. (default=5)
> -    nowayout:
> -	Watchdog cannot be stopped once started
> -	(default=kernel config parameter)
> -
> --------------------------------------------------
> -
>  machzwd:
>      nowayout:
>  	Watchdog cannot be stopped once started
> diff --git a/drivers/watchdog/Kconfig b/drivers/watchdog/Kconfig
> index 8188963a405b..e631f1ae303a 100644
> --- a/drivers/watchdog/Kconfig
> +++ b/drivers/watchdog/Kconfig
> @@ -477,13 +477,6 @@ config IXP4XX_WATCHDOG
>  
>  	  Say N if you are unsure.
>  
> -config KS8695_WATCHDOG
> -	tristate "KS8695 watchdog"
> -	depends on ARCH_KS8695
> -	help
> -	  Watchdog timer embedded into KS8695 processor. This will reboot your
> -	  system when the timeout is reached.
> -
>  config HAVE_S3C2410_WATCHDOG
>  	bool
>  	help
> diff --git a/drivers/watchdog/Makefile b/drivers/watchdog/Makefile
> index 7caa920e7e60..85f55ec76f8d 100644
> --- a/drivers/watchdog/Makefile
> +++ b/drivers/watchdog/Makefile
> @@ -49,7 +49,6 @@ obj-$(CONFIG_21285_WATCHDOG) += wdt285.o
>  obj-$(CONFIG_977_WATCHDOG) += wdt977.o
>  obj-$(CONFIG_FTWDT010_WATCHDOG) += ftwdt010_wdt.o
>  obj-$(CONFIG_IXP4XX_WATCHDOG) += ixp4xx_wdt.o
> -obj-$(CONFIG_KS8695_WATCHDOG) += ks8695_wdt.o
>  obj-$(CONFIG_S3C2410_WATCHDOG) += s3c2410_wdt.o
>  obj-$(CONFIG_SA1100_WATCHDOG) += sa1100_wdt.o
>  obj-$(CONFIG_SAMA5D4_WATCHDOG) += sama5d4_wdt.o
> diff --git a/drivers/watchdog/ks8695_wdt.c b/drivers/watchdog/ks8695_wdt.c
> deleted file mode 100644
> index 1550ce3c5702..000000000000
> --- a/drivers/watchdog/ks8695_wdt.c
> +++ /dev/null
> @@ -1,319 +0,0 @@
> -// SPDX-License-Identifier: GPL-2.0-only
> -/*
> - * Watchdog driver for Kendin/Micrel KS8695.
> - *
> - * (C) 2007 Andrew Victor
> - */
> -
> -#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
> -
> -#include <linux/bitops.h>
> -#include <linux/errno.h>
> -#include <linux/fs.h>
> -#include <linux/init.h>
> -#include <linux/kernel.h>
> -#include <linux/miscdevice.h>
> -#include <linux/module.h>
> -#include <linux/moduleparam.h>
> -#include <linux/platform_device.h>
> -#include <linux/types.h>
> -#include <linux/watchdog.h>
> -#include <linux/io.h>
> -#include <linux/uaccess.h>
> -#include <mach/hardware.h>
> -
> -#define KS8695_TMR_OFFSET	(0xF0000 + 0xE400)
> -#define KS8695_TMR_VA		(KS8695_IO_VA + KS8695_TMR_OFFSET)
> -
> -/*
> - * Timer registers
> - */
> -#define KS8695_TMCON		(0x00)		/* Timer Control Register */
> -#define KS8695_T0TC		(0x08)		/* Timer 0 Timeout Count Register */
> -#define TMCON_T0EN		(1 << 0)	/* Timer 0 Enable */
> -
> -/* Timer0 Timeout Counter Register */
> -#define T0TC_WATCHDOG		(0xff)		/* Enable watchdog mode */
> -
> -#define WDT_DEFAULT_TIME	5	/* seconds */
> -#define WDT_MAX_TIME		171	/* seconds */
> -
> -static int wdt_time = WDT_DEFAULT_TIME;
> -static bool nowayout = WATCHDOG_NOWAYOUT;
> -
> -module_param(wdt_time, int, 0);
> -MODULE_PARM_DESC(wdt_time, "Watchdog time in seconds. (default="
> -					__MODULE_STRING(WDT_DEFAULT_TIME) ")");
> -
> -#ifdef CONFIG_WATCHDOG_NOWAYOUT
> -module_param(nowayout, bool, 0);
> -MODULE_PARM_DESC(nowayout, "Watchdog cannot be stopped once started (default="
> -				__MODULE_STRING(WATCHDOG_NOWAYOUT) ")");
> -#endif
> -
> -
> -static unsigned long ks8695wdt_busy;
> -static DEFINE_SPINLOCK(ks8695_lock);
> -
> -/* ......................................................................... */
> -
> -/*
> - * Disable the watchdog.
> - */
> -static inline void ks8695_wdt_stop(void)
> -{
> -	unsigned long tmcon;
> -
> -	spin_lock(&ks8695_lock);
> -	/* disable timer0 */
> -	tmcon = __raw_readl(KS8695_TMR_VA + KS8695_TMCON);
> -	__raw_writel(tmcon & ~TMCON_T0EN, KS8695_TMR_VA + KS8695_TMCON);
> -	spin_unlock(&ks8695_lock);
> -}
> -
> -/*
> - * Enable and reset the watchdog.
> - */
> -static inline void ks8695_wdt_start(void)
> -{
> -	unsigned long tmcon;
> -	unsigned long tval = wdt_time * KS8695_CLOCK_RATE;
> -
> -	spin_lock(&ks8695_lock);
> -	/* disable timer0 */
> -	tmcon = __raw_readl(KS8695_TMR_VA + KS8695_TMCON);
> -	__raw_writel(tmcon & ~TMCON_T0EN, KS8695_TMR_VA + KS8695_TMCON);
> -
> -	/* program timer0 */
> -	__raw_writel(tval | T0TC_WATCHDOG, KS8695_TMR_VA + KS8695_T0TC);
> -
> -	/* re-enable timer0 */
> -	tmcon = __raw_readl(KS8695_TMR_VA + KS8695_TMCON);
> -	__raw_writel(tmcon | TMCON_T0EN, KS8695_TMR_VA + KS8695_TMCON);
> -	spin_unlock(&ks8695_lock);
> -}
> -
> -/*
> - * Reload the watchdog timer.  (ie, pat the watchdog)
> - */
> -static inline void ks8695_wdt_reload(void)
> -{
> -	unsigned long tmcon;
> -
> -	spin_lock(&ks8695_lock);
> -	/* disable, then re-enable timer0 */
> -	tmcon = __raw_readl(KS8695_TMR_VA + KS8695_TMCON);
> -	__raw_writel(tmcon & ~TMCON_T0EN, KS8695_TMR_VA + KS8695_TMCON);
> -	__raw_writel(tmcon | TMCON_T0EN, KS8695_TMR_VA + KS8695_TMCON);
> -	spin_unlock(&ks8695_lock);
> -}
> -
> -/*
> - * Change the watchdog time interval.
> - */
> -static int ks8695_wdt_settimeout(int new_time)
> -{
> -	/*
> -	 * All counting occurs at KS8695_CLOCK_RATE / 128 = 0.256 Hz
> -	 *
> -	 * Since WDV is a 16-bit counter, the maximum period is
> -	 * 65536 / 0.256 = 256 seconds.
> -	 */
> -	if ((new_time <= 0) || (new_time > WDT_MAX_TIME))
> -		return -EINVAL;
> -
> -	/* Set new watchdog time. It will be used when
> -	   ks8695_wdt_start() is called. */
> -	wdt_time = new_time;
> -	return 0;
> -}
> -
> -/* ......................................................................... */
> -
> -/*
> - * Watchdog device is opened, and watchdog starts running.
> - */
> -static int ks8695_wdt_open(struct inode *inode, struct file *file)
> -{
> -	if (test_and_set_bit(0, &ks8695wdt_busy))
> -		return -EBUSY;
> -
> -	ks8695_wdt_start();
> -	return stream_open(inode, file);
> -}
> -
> -/*
> - * Close the watchdog device.
> - * If CONFIG_WATCHDOG_NOWAYOUT is NOT defined then the watchdog is also
> - *  disabled.
> - */
> -static int ks8695_wdt_close(struct inode *inode, struct file *file)
> -{
> -	/* Disable the watchdog when file is closed */
> -	if (!nowayout)
> -		ks8695_wdt_stop();
> -	clear_bit(0, &ks8695wdt_busy);
> -	return 0;
> -}
> -
> -static const struct watchdog_info ks8695_wdt_info = {
> -	.identity	= "ks8695 watchdog",
> -	.options	= WDIOF_SETTIMEOUT | WDIOF_KEEPALIVEPING,
> -};
> -
> -/*
> - * Handle commands from user-space.
> - */
> -static long ks8695_wdt_ioctl(struct file *file, unsigned int cmd,
> -							unsigned long arg)
> -{
> -	void __user *argp = (void __user *)arg;
> -	int __user *p = argp;
> -	int new_value;
> -
> -	switch (cmd) {
> -	case WDIOC_GETSUPPORT:
> -		return copy_to_user(argp, &ks8695_wdt_info,
> -					sizeof(ks8695_wdt_info)) ? -EFAULT : 0;
> -	case WDIOC_GETSTATUS:
> -	case WDIOC_GETBOOTSTATUS:
> -		return put_user(0, p);
> -	case WDIOC_SETOPTIONS:
> -		if (get_user(new_value, p))
> -			return -EFAULT;
> -		if (new_value & WDIOS_DISABLECARD)
> -			ks8695_wdt_stop();
> -		if (new_value & WDIOS_ENABLECARD)
> -			ks8695_wdt_start();
> -		return 0;
> -	case WDIOC_KEEPALIVE:
> -		ks8695_wdt_reload();	/* pat the watchdog */
> -		return 0;
> -	case WDIOC_SETTIMEOUT:
> -		if (get_user(new_value, p))
> -			return -EFAULT;
> -		if (ks8695_wdt_settimeout(new_value))
> -			return -EINVAL;
> -		/* Enable new time value */
> -		ks8695_wdt_start();
> -		/* Return current value */
> -		return put_user(wdt_time, p);
> -	case WDIOC_GETTIMEOUT:
> -		return put_user(wdt_time, p);
> -	default:
> -		return -ENOTTY;
> -	}
> -}
> -
> -/*
> - * Pat the watchdog whenever device is written to.
> - */
> -static ssize_t ks8695_wdt_write(struct file *file, const char *data,
> -						size_t len, loff_t *ppos)
> -{
> -	ks8695_wdt_reload();		/* pat the watchdog */
> -	return len;
> -}
> -
> -/* ......................................................................... */
> -
> -static const struct file_operations ks8695wdt_fops = {
> -	.owner		= THIS_MODULE,
> -	.llseek		= no_llseek,
> -	.unlocked_ioctl	= ks8695_wdt_ioctl,
> -	.open		= ks8695_wdt_open,
> -	.release	= ks8695_wdt_close,
> -	.write		= ks8695_wdt_write,
> -};
> -
> -static struct miscdevice ks8695wdt_miscdev = {
> -	.minor		= WATCHDOG_MINOR,
> -	.name		= "watchdog",
> -	.fops		= &ks8695wdt_fops,
> -};
> -
> -static int ks8695wdt_probe(struct platform_device *pdev)
> -{
> -	int res;
> -
> -	if (ks8695wdt_miscdev.parent)
> -		return -EBUSY;
> -	ks8695wdt_miscdev.parent = &pdev->dev;
> -
> -	res = misc_register(&ks8695wdt_miscdev);
> -	if (res)
> -		return res;
> -
> -	pr_info("KS8695 Watchdog Timer enabled (%d seconds%s)\n",
> -		wdt_time, nowayout ? ", nowayout" : "");
> -	return 0;
> -}
> -
> -static int ks8695wdt_remove(struct platform_device *pdev)
> -{
> -	misc_deregister(&ks8695wdt_miscdev);
> -	ks8695wdt_miscdev.parent = NULL;
> -
> -	return 0;
> -}
> -
> -static void ks8695wdt_shutdown(struct platform_device *pdev)
> -{
> -	ks8695_wdt_stop();
> -}
> -
> -#ifdef CONFIG_PM
> -
> -static int ks8695wdt_suspend(struct platform_device *pdev, pm_message_t message)
> -{
> -	ks8695_wdt_stop();
> -	return 0;
> -}
> -
> -static int ks8695wdt_resume(struct platform_device *pdev)
> -{
> -	if (ks8695wdt_busy)
> -		ks8695_wdt_start();
> -	return 0;
> -}
> -
> -#else
> -#define ks8695wdt_suspend NULL
> -#define ks8695wdt_resume	NULL
> -#endif
> -
> -static struct platform_driver ks8695wdt_driver = {
> -	.probe		= ks8695wdt_probe,
> -	.remove		= ks8695wdt_remove,
> -	.shutdown	= ks8695wdt_shutdown,
> -	.suspend	= ks8695wdt_suspend,
> -	.resume		= ks8695wdt_resume,
> -	.driver		= {
> -		.name	= "ks8695_wdt",
> -	},
> -};
> -
> -static int __init ks8695_wdt_init(void)
> -{
> -	/* Check that the heartbeat value is within range;
> -	   if not reset to the default */
> -	if (ks8695_wdt_settimeout(wdt_time)) {
> -		ks8695_wdt_settimeout(WDT_DEFAULT_TIME);
> -		pr_info("ks8695_wdt: wdt_time value must be 1 <= wdt_time <= %i"
> -					", using %d\n", wdt_time, WDT_MAX_TIME);
> -	}
> -	return platform_driver_register(&ks8695wdt_driver);
> -}
> -
> -static void __exit ks8695_wdt_exit(void)
> -{
> -	platform_driver_unregister(&ks8695wdt_driver);
> -}
> -
> -module_init(ks8695_wdt_init);
> -module_exit(ks8695_wdt_exit);
> -
> -MODULE_AUTHOR("Andrew Victor");
> -MODULE_DESCRIPTION("Watchdog driver for KS8695");
> -MODULE_LICENSE("GPL");
> -MODULE_ALIAS("platform:ks8695_wdt");
> -- 
> 2.20.0
> 

^ permalink raw reply	[flat|nested] 6+ messages in thread

* Re: [PATCH 06/16] watchdog: remove w90x900 driver
  2019-08-09 20:27 ` [PATCH 06/16] watchdog: remove w90x900 driver Arnd Bergmann
@ 2019-08-09 20:42   ` Guenter Roeck
  0 siblings, 0 replies; 6+ messages in thread
From: Guenter Roeck @ 2019-08-09 20:42 UTC (permalink / raw)
  To: Arnd Bergmann
  Cc: soc, Wim Van Sebroeck, Jonathan Corbet, linux-watchdog,
	linux-doc, linux-kernel

On Fri, Aug 09, 2019 at 10:27:34PM +0200, Arnd Bergmann wrote:
> The ARM w90x900 platform is getting removed, so this driver is obsolete
> 
> Signed-off-by: Arnd Bergmann <arnd@arndb.de>

Acked-by: Guenter Roeck <linux@roeck-us.net>

> ---
>  .../watchdog/watchdog-parameters.rst          |  10 -
>  drivers/watchdog/Kconfig                      |   9 -
>  drivers/watchdog/Makefile                     |   1 -
>  drivers/watchdog/nuc900_wdt.c                 | 302 ------------------
>  4 files changed, 322 deletions(-)
>  delete mode 100644 drivers/watchdog/nuc900_wdt.c
> 
> diff --git a/Documentation/watchdog/watchdog-parameters.rst b/Documentation/watchdog/watchdog-parameters.rst
> index 226aba56f704..223c99361a30 100644
> --- a/Documentation/watchdog/watchdog-parameters.rst
> +++ b/Documentation/watchdog/watchdog-parameters.rst
> @@ -366,16 +366,6 @@ nic7018_wdt:
>  
>  -------------------------------------------------
>  
> -nuc900_wdt:
> -    heartbeat:
> -	Watchdog heartbeats in seconds.
> -	(default = 15)
> -    nowayout:
> -	Watchdog cannot be stopped once started
> -	(default=kernel config parameter)
> -
> --------------------------------------------------
> -
>  omap_wdt:
>      timer_margin:
>  	initial watchdog timeout (in seconds)
> diff --git a/drivers/watchdog/Kconfig b/drivers/watchdog/Kconfig
> index e631f1ae303a..0e64f501ef30 100644
> --- a/drivers/watchdog/Kconfig
> +++ b/drivers/watchdog/Kconfig
> @@ -655,15 +655,6 @@ config STMP3XXX_RTC_WATCHDOG
>  	  To compile this driver as a module, choose M here: the
>  	  module will be called stmp3xxx_rtc_wdt.
>  
> -config NUC900_WATCHDOG
> -	tristate "Nuvoton NUC900 watchdog"
> -	depends on ARCH_W90X900 || COMPILE_TEST
> -	help
> -	  Say Y here if to include support for the watchdog timer
> -	  for the Nuvoton NUC900 series SoCs.
> -	  To compile this driver as a module, choose M here: the
> -	  module will be called nuc900_wdt.
> -
>  config TS4800_WATCHDOG
>  	tristate "TS-4800 Watchdog"
>  	depends on HAS_IOMEM && OF
> diff --git a/drivers/watchdog/Makefile b/drivers/watchdog/Makefile
> index 85f55ec76f8d..b5a0aed537af 100644
> --- a/drivers/watchdog/Makefile
> +++ b/drivers/watchdog/Makefile
> @@ -63,7 +63,6 @@ obj-$(CONFIG_RN5T618_WATCHDOG) += rn5t618_wdt.o
>  obj-$(CONFIG_COH901327_WATCHDOG) += coh901327_wdt.o
>  obj-$(CONFIG_NPCM7XX_WATCHDOG) += npcm_wdt.o
>  obj-$(CONFIG_STMP3XXX_RTC_WATCHDOG) += stmp3xxx_rtc_wdt.o
> -obj-$(CONFIG_NUC900_WATCHDOG) += nuc900_wdt.o
>  obj-$(CONFIG_TS4800_WATCHDOG) += ts4800_wdt.o
>  obj-$(CONFIG_TS72XX_WATCHDOG) += ts72xx_wdt.o
>  obj-$(CONFIG_IMX2_WDT) += imx2_wdt.o
> diff --git a/drivers/watchdog/nuc900_wdt.c b/drivers/watchdog/nuc900_wdt.c
> deleted file mode 100644
> index db124cebe838..000000000000
> --- a/drivers/watchdog/nuc900_wdt.c
> +++ /dev/null
> @@ -1,302 +0,0 @@
> -// SPDX-License-Identifier: GPL-2.0-only
> -/*
> - * Copyright (c) 2009 Nuvoton technology corporation.
> - *
> - * Wan ZongShun <mcuos.com@gmail.com>
> - */
> -
> -#include <linux/bitops.h>
> -#include <linux/errno.h>
> -#include <linux/fs.h>
> -#include <linux/io.h>
> -#include <linux/clk.h>
> -#include <linux/kernel.h>
> -#include <linux/miscdevice.h>
> -#include <linux/module.h>
> -#include <linux/moduleparam.h>
> -#include <linux/platform_device.h>
> -#include <linux/slab.h>
> -#include <linux/interrupt.h>
> -#include <linux/types.h>
> -#include <linux/watchdog.h>
> -#include <linux/uaccess.h>
> -
> -#define REG_WTCR		0x1c
> -#define WTCLK			(0x01 << 10)
> -#define WTE			(0x01 << 7)	/*wdt enable*/
> -#define WTIS			(0x03 << 4)
> -#define WTIF			(0x01 << 3)
> -#define WTRF			(0x01 << 2)
> -#define WTRE			(0x01 << 1)
> -#define WTR			(0x01 << 0)
> -/*
> - * The watchdog time interval can be calculated via following formula:
> - * WTIS		real time interval (formula)
> - * 0x00		((2^ 14 ) * ((external crystal freq) / 256))seconds
> - * 0x01		((2^ 16 ) * ((external crystal freq) / 256))seconds
> - * 0x02		((2^ 18 ) * ((external crystal freq) / 256))seconds
> - * 0x03		((2^ 20 ) * ((external crystal freq) / 256))seconds
> - *
> - * The external crystal freq is 15Mhz in the nuc900 evaluation board.
> - * So 0x00 = +-0.28 seconds, 0x01 = +-1.12 seconds, 0x02 = +-4.48 seconds,
> - * 0x03 = +- 16.92 seconds..
> - */
> -#define WDT_HW_TIMEOUT		0x02
> -#define WDT_TIMEOUT		(HZ/2)
> -#define WDT_HEARTBEAT		15
> -
> -static int heartbeat = WDT_HEARTBEAT;
> -module_param(heartbeat, int, 0);
> -MODULE_PARM_DESC(heartbeat, "Watchdog heartbeats in seconds. "
> -	"(default = " __MODULE_STRING(WDT_HEARTBEAT) ")");
> -
> -static bool nowayout = WATCHDOG_NOWAYOUT;
> -module_param(nowayout, bool, 0);
> -MODULE_PARM_DESC(nowayout, "Watchdog cannot be stopped once started "
> -	"(default=" __MODULE_STRING(WATCHDOG_NOWAYOUT) ")");
> -
> -struct nuc900_wdt {
> -	struct clk	 *wdt_clock;
> -	struct platform_device *pdev;
> -	void __iomem	 *wdt_base;
> -	char		 expect_close;
> -	struct timer_list timer;
> -	spinlock_t       wdt_lock;
> -	unsigned long next_heartbeat;
> -};
> -
> -static unsigned long nuc900wdt_busy;
> -static struct nuc900_wdt *nuc900_wdt;
> -
> -static inline void nuc900_wdt_keepalive(void)
> -{
> -	unsigned int val;
> -
> -	spin_lock(&nuc900_wdt->wdt_lock);
> -
> -	val = __raw_readl(nuc900_wdt->wdt_base + REG_WTCR);
> -	val |= (WTR | WTIF);
> -	__raw_writel(val, nuc900_wdt->wdt_base + REG_WTCR);
> -
> -	spin_unlock(&nuc900_wdt->wdt_lock);
> -}
> -
> -static inline void nuc900_wdt_start(void)
> -{
> -	unsigned int val;
> -
> -	spin_lock(&nuc900_wdt->wdt_lock);
> -
> -	val = __raw_readl(nuc900_wdt->wdt_base + REG_WTCR);
> -	val |= (WTRE | WTE | WTR | WTCLK | WTIF);
> -	val &= ~WTIS;
> -	val |= (WDT_HW_TIMEOUT << 0x04);
> -	__raw_writel(val, nuc900_wdt->wdt_base + REG_WTCR);
> -
> -	spin_unlock(&nuc900_wdt->wdt_lock);
> -
> -	nuc900_wdt->next_heartbeat = jiffies + heartbeat * HZ;
> -	mod_timer(&nuc900_wdt->timer, jiffies + WDT_TIMEOUT);
> -}
> -
> -static inline void nuc900_wdt_stop(void)
> -{
> -	unsigned int val;
> -
> -	del_timer(&nuc900_wdt->timer);
> -
> -	spin_lock(&nuc900_wdt->wdt_lock);
> -
> -	val = __raw_readl(nuc900_wdt->wdt_base + REG_WTCR);
> -	val &= ~WTE;
> -	__raw_writel(val, nuc900_wdt->wdt_base + REG_WTCR);
> -
> -	spin_unlock(&nuc900_wdt->wdt_lock);
> -}
> -
> -static inline void nuc900_wdt_ping(void)
> -{
> -	nuc900_wdt->next_heartbeat = jiffies + heartbeat * HZ;
> -}
> -
> -static int nuc900_wdt_open(struct inode *inode, struct file *file)
> -{
> -
> -	if (test_and_set_bit(0, &nuc900wdt_busy))
> -		return -EBUSY;
> -
> -	nuc900_wdt_start();
> -
> -	return stream_open(inode, file);
> -}
> -
> -static int nuc900_wdt_close(struct inode *inode, struct file *file)
> -{
> -	if (nuc900_wdt->expect_close == 42)
> -		nuc900_wdt_stop();
> -	else {
> -		dev_crit(&nuc900_wdt->pdev->dev,
> -			"Unexpected close, not stopping watchdog!\n");
> -		nuc900_wdt_ping();
> -	}
> -
> -	nuc900_wdt->expect_close = 0;
> -	clear_bit(0, &nuc900wdt_busy);
> -	return 0;
> -}
> -
> -static const struct watchdog_info nuc900_wdt_info = {
> -	.identity	= "nuc900 watchdog",
> -	.options	= WDIOF_SETTIMEOUT | WDIOF_KEEPALIVEPING |
> -						WDIOF_MAGICCLOSE,
> -};
> -
> -static long nuc900_wdt_ioctl(struct file *file,
> -					unsigned int cmd, unsigned long arg)
> -{
> -	void __user *argp = (void __user *)arg;
> -	int __user *p = argp;
> -	int new_value;
> -
> -	switch (cmd) {
> -	case WDIOC_GETSUPPORT:
> -		return copy_to_user(argp, &nuc900_wdt_info,
> -				sizeof(nuc900_wdt_info)) ? -EFAULT : 0;
> -	case WDIOC_GETSTATUS:
> -	case WDIOC_GETBOOTSTATUS:
> -		return put_user(0, p);
> -
> -	case WDIOC_KEEPALIVE:
> -		nuc900_wdt_ping();
> -		return 0;
> -
> -	case WDIOC_SETTIMEOUT:
> -		if (get_user(new_value, p))
> -			return -EFAULT;
> -
> -		heartbeat = new_value;
> -		nuc900_wdt_ping();
> -
> -		return put_user(new_value, p);
> -	case WDIOC_GETTIMEOUT:
> -		return put_user(heartbeat, p);
> -	default:
> -		return -ENOTTY;
> -	}
> -}
> -
> -static ssize_t nuc900_wdt_write(struct file *file, const char __user *data,
> -						size_t len, loff_t *ppos)
> -{
> -	if (!len)
> -		return 0;
> -
> -	/* Scan for magic character */
> -	if (!nowayout) {
> -		size_t i;
> -
> -		nuc900_wdt->expect_close = 0;
> -
> -		for (i = 0; i < len; i++) {
> -			char c;
> -			if (get_user(c, data + i))
> -				return -EFAULT;
> -			if (c == 'V') {
> -				nuc900_wdt->expect_close = 42;
> -				break;
> -			}
> -		}
> -	}
> -
> -	nuc900_wdt_ping();
> -	return len;
> -}
> -
> -static void nuc900_wdt_timer_ping(struct timer_list *unused)
> -{
> -	if (time_before(jiffies, nuc900_wdt->next_heartbeat)) {
> -		nuc900_wdt_keepalive();
> -		mod_timer(&nuc900_wdt->timer, jiffies + WDT_TIMEOUT);
> -	} else
> -		dev_warn(&nuc900_wdt->pdev->dev, "Will reset the machine !\n");
> -}
> -
> -static const struct file_operations nuc900wdt_fops = {
> -	.owner		= THIS_MODULE,
> -	.llseek		= no_llseek,
> -	.unlocked_ioctl	= nuc900_wdt_ioctl,
> -	.open		= nuc900_wdt_open,
> -	.release	= nuc900_wdt_close,
> -	.write		= nuc900_wdt_write,
> -};
> -
> -static struct miscdevice nuc900wdt_miscdev = {
> -	.minor		= WATCHDOG_MINOR,
> -	.name		= "watchdog",
> -	.fops		= &nuc900wdt_fops,
> -};
> -
> -static int nuc900wdt_probe(struct platform_device *pdev)
> -{
> -	int ret = 0;
> -
> -	nuc900_wdt = devm_kzalloc(&pdev->dev, sizeof(*nuc900_wdt),
> -				GFP_KERNEL);
> -	if (!nuc900_wdt)
> -		return -ENOMEM;
> -
> -	nuc900_wdt->pdev = pdev;
> -
> -	spin_lock_init(&nuc900_wdt->wdt_lock);
> -
> -	nuc900_wdt->wdt_base = devm_platform_ioremap_resource(pdev, 0);
> -	if (IS_ERR(nuc900_wdt->wdt_base))
> -		return PTR_ERR(nuc900_wdt->wdt_base);
> -
> -	nuc900_wdt->wdt_clock = devm_clk_get(&pdev->dev, NULL);
> -	if (IS_ERR(nuc900_wdt->wdt_clock)) {
> -		dev_err(&pdev->dev, "failed to find watchdog clock source\n");
> -		return PTR_ERR(nuc900_wdt->wdt_clock);
> -	}
> -
> -	clk_enable(nuc900_wdt->wdt_clock);
> -
> -	timer_setup(&nuc900_wdt->timer, nuc900_wdt_timer_ping, 0);
> -
> -	ret = misc_register(&nuc900wdt_miscdev);
> -	if (ret) {
> -		dev_err(&pdev->dev, "err register miscdev on minor=%d (%d)\n",
> -			WATCHDOG_MINOR, ret);
> -		goto err_clk;
> -	}
> -
> -	return 0;
> -
> -err_clk:
> -	clk_disable(nuc900_wdt->wdt_clock);
> -	return ret;
> -}
> -
> -static int nuc900wdt_remove(struct platform_device *pdev)
> -{
> -	misc_deregister(&nuc900wdt_miscdev);
> -
> -	clk_disable(nuc900_wdt->wdt_clock);
> -
> -	return 0;
> -}
> -
> -static struct platform_driver nuc900wdt_driver = {
> -	.probe		= nuc900wdt_probe,
> -	.remove		= nuc900wdt_remove,
> -	.driver		= {
> -		.name	= "nuc900-wdt",
> -	},
> -};
> -
> -module_platform_driver(nuc900wdt_driver);
> -
> -MODULE_AUTHOR("Wan ZongShun <mcuos.com@gmail.com>");
> -MODULE_DESCRIPTION("Watchdog driver for NUC900");
> -MODULE_LICENSE("GPL");
> -MODULE_ALIAS("platform:nuc900-wdt");
> -- 
> 2.20.0
> 

^ permalink raw reply	[flat|nested] 6+ messages in thread

* Re: [PATCH 04/16] watchdog: remove ks8695 driver
  2019-08-09 20:42   ` Guenter Roeck
@ 2019-08-10  8:37     ` Arnd Bergmann
  2019-08-10 12:56       ` Guenter Roeck
  0 siblings, 1 reply; 6+ messages in thread
From: Arnd Bergmann @ 2019-08-10  8:37 UTC (permalink / raw)
  To: Guenter Roeck
  Cc: soc, Wim Van Sebroeck, Jonathan Corbet, LINUXWATCHDOG,
	open list:DOCUMENTATION, Linux Kernel Mailing List

On Fri, Aug 9, 2019 at 10:42 PM Guenter Roeck <linux@roeck-us.net> wrote:
>
> On Fri, Aug 09, 2019 at 10:27:32PM +0200, Arnd Bergmann wrote:
> > The platform is getting removed, so there are no remaining
> > users of this driver.
> >
> > Signed-off-by: Arnd Bergmann <arnd@arndb.de>
>
> Acked-by: Guenter Roeck <linux@roeck-us.net>
>
> Please let me know if this should be applied through the watchdog tree.
> For now I'll assume it will be applied together with the rest of the
> series.

For this series, my preference is that you apply the patches through
the subsystem tree as there are no dependencies.

Thanks,

     Arnd

^ permalink raw reply	[flat|nested] 6+ messages in thread

* Re: [PATCH 04/16] watchdog: remove ks8695 driver
  2019-08-10  8:37     ` Arnd Bergmann
@ 2019-08-10 12:56       ` Guenter Roeck
  0 siblings, 0 replies; 6+ messages in thread
From: Guenter Roeck @ 2019-08-10 12:56 UTC (permalink / raw)
  To: Arnd Bergmann
  Cc: soc, Wim Van Sebroeck, Jonathan Corbet, LINUXWATCHDOG,
	open list:DOCUMENTATION, Linux Kernel Mailing List

On Sat, Aug 10, 2019 at 10:37:14AM +0200, Arnd Bergmann wrote:
> On Fri, Aug 9, 2019 at 10:42 PM Guenter Roeck <linux@roeck-us.net> wrote:
> >
> > On Fri, Aug 09, 2019 at 10:27:32PM +0200, Arnd Bergmann wrote:
> > > The platform is getting removed, so there are no remaining
> > > users of this driver.
> > >
> > > Signed-off-by: Arnd Bergmann <arnd@arndb.de>
> >
> > Acked-by: Guenter Roeck <linux@roeck-us.net>
> >
> > Please let me know if this should be applied through the watchdog tree.
> > For now I'll assume it will be applied together with the rest of the
> > series.
> 
> For this series, my preference is that you apply the patches through
> the subsystem tree as there are no dependencies.
> 
Ok, I added both patches to my tree.

Thanks,
Guenter

^ permalink raw reply	[flat|nested] 6+ messages in thread

end of thread, back to index

Thread overview: 6+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
     [not found] <20190809202749.742267-1-arnd@arndb.de>
2019-08-09 20:27 ` [PATCH 04/16] watchdog: remove ks8695 driver Arnd Bergmann
2019-08-09 20:42   ` Guenter Roeck
2019-08-10  8:37     ` Arnd Bergmann
2019-08-10 12:56       ` Guenter Roeck
2019-08-09 20:27 ` [PATCH 06/16] watchdog: remove w90x900 driver Arnd Bergmann
2019-08-09 20:42   ` Guenter Roeck

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