diff options
author | Arnd Bergmann <arnd@arndb.de> | 2021-01-20 17:27:44 +0100 |
---|---|---|
committer | Wim Van Sebroeck <wim@linux-watchdog.org> | 2021-02-07 14:41:26 +0100 |
commit | c1b50b55b00daa373379bb1062afab5ce279cad1 (patch) | |
tree | fc92cb9198280c4c86acaf2e0ebd5b35c045b883 /drivers/watchdog | |
parent | 30f1ec70ddf5afd6a8d4c0e1ce9f21a4aea936be (diff) | |
download | linux-c1b50b55b00daa373379bb1062afab5ce279cad1.tar.bz2 |
watchdog: remove tango driver
The tango platform is getting removed, so the driver is no
longer needed.
Cc: Marc Gonzalez <marc.w.gonzalez@free.fr>
Cc: Mans Rullgard <mans@mansr.com>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Reviewed-by: Guenter Roeck <linux@roeck-us.net>
Acked-by: Mans Rullgard <mans@mansr.com>
Link: https://lore.kernel.org/r/20210120162745.61268-5-arnd@kernel.org
[groeck: Removed devicetree bindings]
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Wim Van Sebroeck <wim@linux-watchdog.org>
Diffstat (limited to 'drivers/watchdog')
-rw-r--r-- | drivers/watchdog/Kconfig | 11 | ||||
-rw-r--r-- | drivers/watchdog/Makefile | 1 | ||||
-rw-r--r-- | drivers/watchdog/tangox_wdt.c | 209 |
3 files changed, 0 insertions, 221 deletions
diff --git a/drivers/watchdog/Kconfig b/drivers/watchdog/Kconfig index 5d47a702f936..dc191725b4e5 100644 --- a/drivers/watchdog/Kconfig +++ b/drivers/watchdog/Kconfig @@ -254,17 +254,6 @@ config MENZ069_WATCHDOG This driver can also be built as a module. If so the module will be called menz069_wdt. -config TANGOX_WATCHDOG - tristate "Sigma Designs SMP86xx/SMP87xx watchdog" - select WATCHDOG_CORE - depends on ARCH_TANGO || COMPILE_TEST - depends on HAS_IOMEM - help - Support for the watchdog in Sigma Designs SMP86xx (tango3) - and SMP87xx (tango4) family chips. - - This driver can be built as a module. The module name is tangox_wdt. - config WDAT_WDT tristate "ACPI Watchdog Action Table (WDAT)" depends on ACPI diff --git a/drivers/watchdog/Makefile b/drivers/watchdog/Makefile index d7678d8d9893..59ab621720ab 100644 --- a/drivers/watchdog/Makefile +++ b/drivers/watchdog/Makefile @@ -211,7 +211,6 @@ obj-$(CONFIG_DA9055_WATCHDOG) += da9055_wdt.o obj-$(CONFIG_DA9062_WATCHDOG) += da9062_wdt.o obj-$(CONFIG_DA9063_WATCHDOG) += da9063_wdt.o obj-$(CONFIG_GPIO_WATCHDOG) += gpio_wdt.o -obj-$(CONFIG_TANGOX_WATCHDOG) += tangox_wdt.o obj-$(CONFIG_WDAT_WDT) += wdat_wdt.o obj-$(CONFIG_WM831X_WATCHDOG) += wm831x_wdt.o obj-$(CONFIG_WM8350_WATCHDOG) += wm8350_wdt.o diff --git a/drivers/watchdog/tangox_wdt.c b/drivers/watchdog/tangox_wdt.c deleted file mode 100644 index 1afb0e9d808c..000000000000 --- a/drivers/watchdog/tangox_wdt.c +++ /dev/null @@ -1,209 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0+ -/* - * Copyright (C) 2015 Mans Rullgard <mans@mansr.com> - * SMP86xx/SMP87xx Watchdog driver - */ - -#include <linux/bitops.h> -#include <linux/clk.h> -#include <linux/delay.h> -#include <linux/io.h> -#include <linux/kernel.h> -#include <linux/module.h> -#include <linux/moduleparam.h> -#include <linux/mod_devicetable.h> -#include <linux/platform_device.h> -#include <linux/watchdog.h> - -#define DEFAULT_TIMEOUT 30 - -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) ")"); - -static unsigned int timeout; -module_param(timeout, int, 0); -MODULE_PARM_DESC(timeout, "Watchdog timeout"); - -/* - * Counter counts down from programmed value. Reset asserts when - * the counter reaches 1. - */ -#define WD_COUNTER 0 - -#define WD_CONFIG 4 -#define WD_CONFIG_XTAL_IN BIT(0) -#define WD_CONFIG_DISABLE BIT(31) - -struct tangox_wdt_device { - struct watchdog_device wdt; - void __iomem *base; - unsigned long clk_rate; - struct clk *clk; -}; - -static int tangox_wdt_set_timeout(struct watchdog_device *wdt, - unsigned int new_timeout) -{ - wdt->timeout = new_timeout; - - return 0; -} - -static int tangox_wdt_start(struct watchdog_device *wdt) -{ - struct tangox_wdt_device *dev = watchdog_get_drvdata(wdt); - u32 ticks; - - ticks = 1 + wdt->timeout * dev->clk_rate; - writel(ticks, dev->base + WD_COUNTER); - - return 0; -} - -static int tangox_wdt_stop(struct watchdog_device *wdt) -{ - struct tangox_wdt_device *dev = watchdog_get_drvdata(wdt); - - writel(0, dev->base + WD_COUNTER); - - return 0; -} - -static unsigned int tangox_wdt_get_timeleft(struct watchdog_device *wdt) -{ - struct tangox_wdt_device *dev = watchdog_get_drvdata(wdt); - u32 count; - - count = readl(dev->base + WD_COUNTER); - - if (!count) - return 0; - - return (count - 1) / dev->clk_rate; -} - -static const struct watchdog_info tangox_wdt_info = { - .options = WDIOF_SETTIMEOUT | WDIOF_KEEPALIVEPING | WDIOF_MAGICCLOSE, - .identity = "tangox watchdog", -}; - -static int tangox_wdt_restart(struct watchdog_device *wdt, - unsigned long action, void *data) -{ - struct tangox_wdt_device *dev = watchdog_get_drvdata(wdt); - - writel(1, dev->base + WD_COUNTER); - - return 0; -} - -static const struct watchdog_ops tangox_wdt_ops = { - .start = tangox_wdt_start, - .stop = tangox_wdt_stop, - .set_timeout = tangox_wdt_set_timeout, - .get_timeleft = tangox_wdt_get_timeleft, - .restart = tangox_wdt_restart, -}; - -static void tangox_clk_disable_unprepare(void *data) -{ - clk_disable_unprepare(data); -} - -static int tangox_wdt_probe(struct platform_device *pdev) -{ - struct tangox_wdt_device *dev; - u32 config; - int err; - - dev = devm_kzalloc(&pdev->dev, sizeof(*dev), GFP_KERNEL); - if (!dev) - return -ENOMEM; - - dev->base = devm_platform_ioremap_resource(pdev, 0); - if (IS_ERR(dev->base)) - return PTR_ERR(dev->base); - - dev->clk = devm_clk_get(&pdev->dev, NULL); - if (IS_ERR(dev->clk)) - return PTR_ERR(dev->clk); - - err = clk_prepare_enable(dev->clk); - if (err) - return err; - err = devm_add_action_or_reset(&pdev->dev, - tangox_clk_disable_unprepare, dev->clk); - if (err) - return err; - - dev->clk_rate = clk_get_rate(dev->clk); - if (!dev->clk_rate) - return -EINVAL; - - dev->wdt.parent = &pdev->dev; - dev->wdt.info = &tangox_wdt_info; - dev->wdt.ops = &tangox_wdt_ops; - dev->wdt.timeout = DEFAULT_TIMEOUT; - dev->wdt.min_timeout = 1; - dev->wdt.max_hw_heartbeat_ms = (U32_MAX - 1) / dev->clk_rate; - - watchdog_init_timeout(&dev->wdt, timeout, &pdev->dev); - watchdog_set_nowayout(&dev->wdt, nowayout); - watchdog_set_drvdata(&dev->wdt, dev); - - /* - * Deactivate counter if disable bit is set to avoid - * accidental reset. - */ - config = readl(dev->base + WD_CONFIG); - if (config & WD_CONFIG_DISABLE) - writel(0, dev->base + WD_COUNTER); - - writel(WD_CONFIG_XTAL_IN, dev->base + WD_CONFIG); - - /* - * Mark as active and restart with configured timeout if - * already running. - */ - if (readl(dev->base + WD_COUNTER)) { - set_bit(WDOG_HW_RUNNING, &dev->wdt.status); - tangox_wdt_start(&dev->wdt); - } - - watchdog_set_restart_priority(&dev->wdt, 128); - - watchdog_stop_on_unregister(&dev->wdt); - err = devm_watchdog_register_device(&pdev->dev, &dev->wdt); - if (err) - return err; - - platform_set_drvdata(pdev, dev); - - dev_info(&pdev->dev, "SMP86xx/SMP87xx watchdog registered\n"); - - return 0; -} - -static const struct of_device_id tangox_wdt_dt_ids[] = { - { .compatible = "sigma,smp8642-wdt" }, - { .compatible = "sigma,smp8759-wdt" }, - { } -}; -MODULE_DEVICE_TABLE(of, tangox_wdt_dt_ids); - -static struct platform_driver tangox_wdt_driver = { - .probe = tangox_wdt_probe, - .driver = { - .name = "tangox-wdt", - .of_match_table = tangox_wdt_dt_ids, - }, -}; - -module_platform_driver(tangox_wdt_driver); - -MODULE_AUTHOR("Mans Rullgard <mans@mansr.com>"); -MODULE_DESCRIPTION("SMP86xx/SMP87xx Watchdog driver"); -MODULE_LICENSE("GPL"); |