From 4600736f050f210bcdaafd2ef730ad736da9bc0c Mon Sep 17 00:00:00 2001 From: Thomas Bogendoerfer Date: Fri, 6 Nov 2020 14:05:07 +0100 Subject: [PATCH] watchdog: remove pnx83xx driver Commit 625326ea9c84 ("MIPS: Remove PNX833x alias NXP_STB22x") removed support for PNX833x, so it's time to remove watchdog driver, too. Signed-off-by: Thomas Bogendoerfer Reviewed-by: Guenter Roeck Link: https://lore.kernel.org/r/20201106130508.103598-1-tsbogend@alpha.franken.de Signed-off-by: Guenter Roeck Signed-off-by: Wim Van Sebroeck --- drivers/watchdog/Kconfig | 10 -- drivers/watchdog/Makefile | 1 - drivers/watchdog/pnx833x_wdt.c | 277 --------------------------------- 3 files changed, 288 deletions(-) delete mode 100644 drivers/watchdog/pnx833x_wdt.c diff --git a/drivers/watchdog/Kconfig b/drivers/watchdog/Kconfig index f8e9be65036a..5d3c3ec918a8 100644 --- a/drivers/watchdog/Kconfig +++ b/drivers/watchdog/Kconfig @@ -1698,16 +1698,6 @@ config WDT_MTX1 Hardware driver for the MTX-1 boards. This is a watchdog timer that will reboot the machine after a 100 seconds timer expired. -config PNX833X_WDT - tristate "PNX833x Hardware Watchdog" - depends on SOC_PNX8335 - depends on BROKEN - help - Hardware driver for the PNX833x's watchdog. This is a - watchdog timer that will reboot the machine after a programmable - timer has expired and no process has written to /dev/watchdog during - that time. - config SIBYTE_WDOG tristate "Sibyte SoC hardware watchdog" depends on CPU_SB1 || (MIPS && COMPILE_TEST) diff --git a/drivers/watchdog/Makefile b/drivers/watchdog/Makefile index 071a2e50be98..5c74ee19d441 100644 --- a/drivers/watchdog/Makefile +++ b/drivers/watchdog/Makefile @@ -161,7 +161,6 @@ obj-$(CONFIG_RC32434_WDT) += rc32434_wdt.o obj-$(CONFIG_INDYDOG) += indydog.o obj-$(CONFIG_JZ4740_WDT) += jz4740_wdt.o obj-$(CONFIG_WDT_MTX1) += mtx-1_wdt.o -obj-$(CONFIG_PNX833X_WDT) += pnx833x_wdt.o obj-$(CONFIG_SIBYTE_WDOG) += sb_wdog.o obj-$(CONFIG_AR7_WDT) += ar7_wdt.o obj-$(CONFIG_TXX9_WDT) += txx9wdt.o diff --git a/drivers/watchdog/pnx833x_wdt.c b/drivers/watchdog/pnx833x_wdt.c deleted file mode 100644 index 4097d076aab8..000000000000 --- a/drivers/watchdog/pnx833x_wdt.c +++ /dev/null @@ -1,277 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0-or-later -/* - * PNX833x Hardware Watchdog Driver - * Copyright 2008 NXP Semiconductors - * Daniel Laird - * Andre McCurdy - * - * Heavily based upon - IndyDog 0.3 - * A Hardware Watchdog Device for SGI IP22 - * - * (c) Copyright 2002 Guido Guenther , All Rights Reserved. - * - * based on softdog.c by Alan Cox - */ - -#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt - -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include - -#define WATCHDOG_TIMEOUT 30 /* 30 sec Maximum timeout */ -#define WATCHDOG_COUNT_FREQUENCY 68000000U /* Watchdog counts at 68MHZ. */ -#define PNX_WATCHDOG_TIMEOUT (WATCHDOG_TIMEOUT * WATCHDOG_COUNT_FREQUENCY) -#define PNX_TIMEOUT_VALUE 2040000000U - -/** CONFIG block */ -#define PNX833X_CONFIG (0x07000U) -#define PNX833X_CONFIG_CPU_WATCHDOG (0x54) -#define PNX833X_CONFIG_CPU_WATCHDOG_COMPARE (0x58) -#define PNX833X_CONFIG_CPU_COUNTERS_CONTROL (0x1c) - -/** RESET block */ -#define PNX833X_RESET (0x08000U) -#define PNX833X_RESET_CONFIG (0x08) - -static int pnx833x_wdt_alive; - -/* Set default timeout in MHZ.*/ -static int pnx833x_wdt_timeout = PNX_WATCHDOG_TIMEOUT; -module_param(pnx833x_wdt_timeout, int, 0); -MODULE_PARM_DESC(timeout, "Watchdog timeout in Mhz. (68Mhz clock), default=" - __MODULE_STRING(PNX_TIMEOUT_VALUE) "(30 seconds)."); - -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) ")"); - -#define START_DEFAULT 1 -static int start_enabled = START_DEFAULT; -module_param(start_enabled, int, 0); -MODULE_PARM_DESC(start_enabled, "Watchdog is started on module insertion " - "(default=" __MODULE_STRING(START_DEFAULT) ")"); - -static void pnx833x_wdt_start(void) -{ - /* Enable watchdog causing reset. */ - PNX833X_REG(PNX833X_RESET + PNX833X_RESET_CONFIG) |= 0x1; - /* Set timeout.*/ - PNX833X_REG(PNX833X_CONFIG + - PNX833X_CONFIG_CPU_WATCHDOG_COMPARE) = pnx833x_wdt_timeout; - /* Enable watchdog. */ - PNX833X_REG(PNX833X_CONFIG + - PNX833X_CONFIG_CPU_COUNTERS_CONTROL) |= 0x1; - - pr_info("Started watchdog timer\n"); -} - -static void pnx833x_wdt_stop(void) -{ - /* Disable watchdog causing reset. */ - PNX833X_REG(PNX833X_RESET + PNX833X_CONFIG) &= 0xFFFFFFFE; - /* Disable watchdog.*/ - PNX833X_REG(PNX833X_CONFIG + - PNX833X_CONFIG_CPU_COUNTERS_CONTROL) &= 0xFFFFFFFE; - - pr_info("Stopped watchdog timer\n"); -} - -static void pnx833x_wdt_ping(void) -{ - PNX833X_REG(PNX833X_CONFIG + - PNX833X_CONFIG_CPU_WATCHDOG_COMPARE) = pnx833x_wdt_timeout; -} - -/* - * Allow only one person to hold it open - */ -static int pnx833x_wdt_open(struct inode *inode, struct file *file) -{ - if (test_and_set_bit(0, &pnx833x_wdt_alive)) - return -EBUSY; - - if (nowayout) - __module_get(THIS_MODULE); - - /* Activate timer */ - if (!start_enabled) - pnx833x_wdt_start(); - - pnx833x_wdt_ping(); - - pr_info("Started watchdog timer\n"); - - return stream_open(inode, file); -} - -static int pnx833x_wdt_release(struct inode *inode, struct file *file) -{ - /* Shut off the timer. - * Lock it in if it's a module and we defined ...NOWAYOUT */ - if (!nowayout) - pnx833x_wdt_stop(); /* Turn the WDT off */ - - clear_bit(0, &pnx833x_wdt_alive); - return 0; -} - -static ssize_t pnx833x_wdt_write(struct file *file, const char *data, size_t len, loff_t *ppos) -{ - /* Refresh the timer. */ - if (len) - pnx833x_wdt_ping(); - - return len; -} - -static long pnx833x_wdt_ioctl(struct file *file, unsigned int cmd, - unsigned long arg) -{ - int options, new_timeout = 0; - uint32_t timeout, timeout_left = 0; - - static const struct watchdog_info ident = { - .options = WDIOF_KEEPALIVEPING | WDIOF_SETTIMEOUT, - .firmware_version = 0, - .identity = "Hardware Watchdog for PNX833x", - }; - - switch (cmd) { - default: - return -ENOTTY; - - case WDIOC_GETSUPPORT: - if (copy_to_user((struct watchdog_info *)arg, - &ident, sizeof(ident))) - return -EFAULT; - return 0; - - case WDIOC_GETSTATUS: - case WDIOC_GETBOOTSTATUS: - return put_user(0, (int *)arg); - - case WDIOC_SETOPTIONS: - if (get_user(options, (int *)arg)) - return -EFAULT; - - if (options & WDIOS_DISABLECARD) - pnx833x_wdt_stop(); - - if (options & WDIOS_ENABLECARD) - pnx833x_wdt_start(); - - return 0; - - case WDIOC_KEEPALIVE: - pnx833x_wdt_ping(); - return 0; - - case WDIOC_SETTIMEOUT: - { - if (get_user(new_timeout, (int *)arg)) - return -EFAULT; - - pnx833x_wdt_timeout = new_timeout; - PNX833X_REG(PNX833X_CONFIG + - PNX833X_CONFIG_CPU_WATCHDOG_COMPARE) = new_timeout; - return put_user(new_timeout, (int *)arg); - } - - case WDIOC_GETTIMEOUT: - timeout = PNX833X_REG(PNX833X_CONFIG + - PNX833X_CONFIG_CPU_WATCHDOG_COMPARE); - return put_user(timeout, (int *)arg); - - case WDIOC_GETTIMELEFT: - timeout_left = PNX833X_REG(PNX833X_CONFIG + - PNX833X_CONFIG_CPU_WATCHDOG); - return put_user(timeout_left, (int *)arg); - - } -} - -static int pnx833x_wdt_notify_sys(struct notifier_block *this, - unsigned long code, void *unused) -{ - if (code == SYS_DOWN || code == SYS_HALT) - pnx833x_wdt_stop(); /* Turn the WDT off */ - - return NOTIFY_DONE; -} - -static const struct file_operations pnx833x_wdt_fops = { - .owner = THIS_MODULE, - .llseek = no_llseek, - .write = pnx833x_wdt_write, - .unlocked_ioctl = pnx833x_wdt_ioctl, - .compat_ioctl = compat_ptr_ioctl, - .open = pnx833x_wdt_open, - .release = pnx833x_wdt_release, -}; - -static struct miscdevice pnx833x_wdt_miscdev = { - .minor = WATCHDOG_MINOR, - .name = "watchdog", - .fops = &pnx833x_wdt_fops, -}; - -static struct notifier_block pnx833x_wdt_notifier = { - .notifier_call = pnx833x_wdt_notify_sys, -}; - -static int __init watchdog_init(void) -{ - int ret, cause; - - /* Lets check the reason for the reset.*/ - cause = PNX833X_REG(PNX833X_RESET); - /*If bit 31 is set then watchdog was cause of reset.*/ - if (cause & 0x80000000) { - pr_info("The system was previously reset due to the watchdog firing - please investigate...\n"); - } - - ret = register_reboot_notifier(&pnx833x_wdt_notifier); - if (ret) { - pr_err("cannot register reboot notifier (err=%d)\n", ret); - return ret; - } - - ret = misc_register(&pnx833x_wdt_miscdev); - if (ret) { - pr_err("cannot register miscdev on minor=%d (err=%d)\n", - WATCHDOG_MINOR, ret); - unregister_reboot_notifier(&pnx833x_wdt_notifier); - return ret; - } - - pr_info("Hardware Watchdog Timer for PNX833x: Version 0.1\n"); - - if (start_enabled) - pnx833x_wdt_start(); - - return 0; -} - -static void __exit watchdog_exit(void) -{ - misc_deregister(&pnx833x_wdt_miscdev); - unregister_reboot_notifier(&pnx833x_wdt_notifier); -} - -module_init(watchdog_init); -module_exit(watchdog_exit); - -MODULE_AUTHOR("Daniel Laird/Andre McCurdy"); -MODULE_DESCRIPTION("Hardware Watchdog Device for PNX833x"); -MODULE_LICENSE("GPL");