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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>
This commit is contained in:
Arnd Bergmann
Wim Van Sebroeck
parent
30f1ec70dd
commit
c1b50b55b0
@ -1,18 +0,0 @@
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Sigma Designs SMP86xx/SMP87xx watchdog
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Required properties:
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- compatible: Should be "sigma,smp8642-wdt"
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- reg: Specifies the physical address region
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- clocks: Should be a phandle to the clock
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Optional properties:
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- timeout-sec: watchdog timeout in seconds
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Example:
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watchdog@1fd00 {
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compatible = "sigma,smp8642-wdt";
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reg = <0x1fd00 8>;
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clocks = <&xtal_in_clk>;
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timeout-sec = <30>;
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};
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@ -254,17 +254,6 @@ config MENZ069_WATCHDOG
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This driver can also be built as a module. If so the module
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will be called menz069_wdt.
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config TANGOX_WATCHDOG
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tristate "Sigma Designs SMP86xx/SMP87xx watchdog"
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select WATCHDOG_CORE
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depends on ARCH_TANGO || COMPILE_TEST
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depends on HAS_IOMEM
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help
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Support for the watchdog in Sigma Designs SMP86xx (tango3)
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and SMP87xx (tango4) family chips.
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This driver can be built as a module. The module name is tangox_wdt.
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config WDAT_WDT
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tristate "ACPI Watchdog Action Table (WDAT)"
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depends on ACPI
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@ -211,7 +211,6 @@ obj-$(CONFIG_DA9055_WATCHDOG) += da9055_wdt.o
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obj-$(CONFIG_DA9062_WATCHDOG) += da9062_wdt.o
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obj-$(CONFIG_DA9063_WATCHDOG) += da9063_wdt.o
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obj-$(CONFIG_GPIO_WATCHDOG) += gpio_wdt.o
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obj-$(CONFIG_TANGOX_WATCHDOG) += tangox_wdt.o
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obj-$(CONFIG_WDAT_WDT) += wdat_wdt.o
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obj-$(CONFIG_WM831X_WATCHDOG) += wm831x_wdt.o
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obj-$(CONFIG_WM8350_WATCHDOG) += wm8350_wdt.o
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@ -1,209 +0,0 @@
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// SPDX-License-Identifier: GPL-2.0+
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/*
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* Copyright (C) 2015 Mans Rullgard <mans@mansr.com>
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* SMP86xx/SMP87xx Watchdog driver
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*/
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#include <linux/bitops.h>
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#include <linux/clk.h>
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#include <linux/delay.h>
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#include <linux/io.h>
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/moduleparam.h>
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#include <linux/mod_devicetable.h>
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#include <linux/platform_device.h>
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#include <linux/watchdog.h>
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#define DEFAULT_TIMEOUT 30
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static bool nowayout = WATCHDOG_NOWAYOUT;
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module_param(nowayout, bool, 0);
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MODULE_PARM_DESC(nowayout,
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"Watchdog cannot be stopped once started (default="
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__MODULE_STRING(WATCHDOG_NOWAYOUT) ")");
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static unsigned int timeout;
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module_param(timeout, int, 0);
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MODULE_PARM_DESC(timeout, "Watchdog timeout");
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/*
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* Counter counts down from programmed value. Reset asserts when
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* the counter reaches 1.
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*/
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#define WD_COUNTER 0
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#define WD_CONFIG 4
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#define WD_CONFIG_XTAL_IN BIT(0)
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#define WD_CONFIG_DISABLE BIT(31)
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struct tangox_wdt_device {
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struct watchdog_device wdt;
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void __iomem *base;
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unsigned long clk_rate;
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struct clk *clk;
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};
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static int tangox_wdt_set_timeout(struct watchdog_device *wdt,
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unsigned int new_timeout)
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{
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wdt->timeout = new_timeout;
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return 0;
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}
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static int tangox_wdt_start(struct watchdog_device *wdt)
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{
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struct tangox_wdt_device *dev = watchdog_get_drvdata(wdt);
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u32 ticks;
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ticks = 1 + wdt->timeout * dev->clk_rate;
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writel(ticks, dev->base + WD_COUNTER);
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return 0;
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}
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static int tangox_wdt_stop(struct watchdog_device *wdt)
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{
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struct tangox_wdt_device *dev = watchdog_get_drvdata(wdt);
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writel(0, dev->base + WD_COUNTER);
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return 0;
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}
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static unsigned int tangox_wdt_get_timeleft(struct watchdog_device *wdt)
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{
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struct tangox_wdt_device *dev = watchdog_get_drvdata(wdt);
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u32 count;
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count = readl(dev->base + WD_COUNTER);
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if (!count)
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return 0;
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return (count - 1) / dev->clk_rate;
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}
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static const struct watchdog_info tangox_wdt_info = {
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.options = WDIOF_SETTIMEOUT | WDIOF_KEEPALIVEPING | WDIOF_MAGICCLOSE,
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.identity = "tangox watchdog",
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};
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static int tangox_wdt_restart(struct watchdog_device *wdt,
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unsigned long action, void *data)
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{
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struct tangox_wdt_device *dev = watchdog_get_drvdata(wdt);
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writel(1, dev->base + WD_COUNTER);
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return 0;
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}
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static const struct watchdog_ops tangox_wdt_ops = {
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.start = tangox_wdt_start,
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.stop = tangox_wdt_stop,
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.set_timeout = tangox_wdt_set_timeout,
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.get_timeleft = tangox_wdt_get_timeleft,
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.restart = tangox_wdt_restart,
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};
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static void tangox_clk_disable_unprepare(void *data)
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{
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clk_disable_unprepare(data);
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}
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static int tangox_wdt_probe(struct platform_device *pdev)
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{
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struct tangox_wdt_device *dev;
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u32 config;
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int err;
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dev = devm_kzalloc(&pdev->dev, sizeof(*dev), GFP_KERNEL);
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if (!dev)
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return -ENOMEM;
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dev->base = devm_platform_ioremap_resource(pdev, 0);
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if (IS_ERR(dev->base))
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return PTR_ERR(dev->base);
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dev->clk = devm_clk_get(&pdev->dev, NULL);
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if (IS_ERR(dev->clk))
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return PTR_ERR(dev->clk);
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err = clk_prepare_enable(dev->clk);
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if (err)
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return err;
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err = devm_add_action_or_reset(&pdev->dev,
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tangox_clk_disable_unprepare, dev->clk);
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if (err)
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return err;
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dev->clk_rate = clk_get_rate(dev->clk);
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if (!dev->clk_rate)
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return -EINVAL;
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dev->wdt.parent = &pdev->dev;
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dev->wdt.info = &tangox_wdt_info;
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dev->wdt.ops = &tangox_wdt_ops;
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dev->wdt.timeout = DEFAULT_TIMEOUT;
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dev->wdt.min_timeout = 1;
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dev->wdt.max_hw_heartbeat_ms = (U32_MAX - 1) / dev->clk_rate;
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watchdog_init_timeout(&dev->wdt, timeout, &pdev->dev);
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watchdog_set_nowayout(&dev->wdt, nowayout);
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watchdog_set_drvdata(&dev->wdt, dev);
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/*
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* Deactivate counter if disable bit is set to avoid
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* accidental reset.
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*/
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config = readl(dev->base + WD_CONFIG);
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if (config & WD_CONFIG_DISABLE)
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writel(0, dev->base + WD_COUNTER);
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writel(WD_CONFIG_XTAL_IN, dev->base + WD_CONFIG);
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/*
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* Mark as active and restart with configured timeout if
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* already running.
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*/
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if (readl(dev->base + WD_COUNTER)) {
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set_bit(WDOG_HW_RUNNING, &dev->wdt.status);
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tangox_wdt_start(&dev->wdt);
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}
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watchdog_set_restart_priority(&dev->wdt, 128);
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watchdog_stop_on_unregister(&dev->wdt);
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err = devm_watchdog_register_device(&pdev->dev, &dev->wdt);
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if (err)
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return err;
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platform_set_drvdata(pdev, dev);
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dev_info(&pdev->dev, "SMP86xx/SMP87xx watchdog registered\n");
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return 0;
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}
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static const struct of_device_id tangox_wdt_dt_ids[] = {
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{ .compatible = "sigma,smp8642-wdt" },
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{ .compatible = "sigma,smp8759-wdt" },
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{ }
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};
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MODULE_DEVICE_TABLE(of, tangox_wdt_dt_ids);
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static struct platform_driver tangox_wdt_driver = {
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.probe = tangox_wdt_probe,
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.driver = {
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.name = "tangox-wdt",
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.of_match_table = tangox_wdt_dt_ids,
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},
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};
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module_platform_driver(tangox_wdt_driver);
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MODULE_AUTHOR("Mans Rullgard <mans@mansr.com>");
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MODULE_DESCRIPTION("SMP86xx/SMP87xx Watchdog driver");
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MODULE_LICENSE("GPL");
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