// SPDX-License-Identifier: GPL-2.0+ /* * Mediatek Watchdog Driver * * Copyright (C) 2014 Matthias Brugger * * Matthias Brugger <[email protected]> * * Based on sunxi_wdt.c */ #include <dt-bindings/reset/mt2712-resets.h> #include <dt-bindings/reset/mediatek,mt6795-resets.h> #include <dt-bindings/reset/mt7986-resets.h> #include <dt-bindings/reset/mt8183-resets.h> #include <dt-bindings/reset/mt8186-resets.h> #include <dt-bindings/reset/mt8188-resets.h> #include <dt-bindings/reset/mt8192-resets.h> #include <dt-bindings/reset/mt8195-resets.h> #include <linux/delay.h> #include <linux/err.h> #include <linux/init.h> #include <linux/io.h> #include <linux/kernel.h> #include <linux/module.h> #include <linux/moduleparam.h> #include <linux/of.h> #include <linux/platform_device.h> #include <linux/reset-controller.h> #include <linux/types.h> #include <linux/watchdog.h> #include <linux/interrupt.h> #define WDT_MAX_TIMEOUT … #define WDT_MIN_TIMEOUT … #define WDT_LENGTH_TIMEOUT(n) … #define WDT_LENGTH … #define WDT_LENGTH_KEY … #define WDT_RST … #define WDT_RST_RELOAD … #define WDT_MODE … #define WDT_MODE_EN … #define WDT_MODE_EXT_POL_LOW … #define WDT_MODE_EXT_POL_HIGH … #define WDT_MODE_EXRST_EN … #define WDT_MODE_IRQ_EN … #define WDT_MODE_AUTO_START … #define WDT_MODE_DUAL_EN … #define WDT_MODE_CNT_SEL … #define WDT_MODE_KEY … #define WDT_SWRST … #define WDT_SWRST_KEY … #define WDT_SWSYSRST … #define WDT_SWSYS_RST_KEY … #define WDT_SWSYSRST_EN … #define DRV_NAME … #define DRV_VERSION … #define MT7988_TOPRGU_SW_RST_NUM … static bool nowayout = … WATCHDOG_NOWAYOUT; static unsigned int timeout; struct mtk_wdt_dev { … }; struct mtk_wdt_data { … }; static const struct mtk_wdt_data mt2712_data = …; static const struct mtk_wdt_data mt6795_data = …; static const struct mtk_wdt_data mt7986_data = …; static const struct mtk_wdt_data mt7988_data = …; static const struct mtk_wdt_data mt8183_data = …; static const struct mtk_wdt_data mt8186_data = …; static const struct mtk_wdt_data mt8188_data = …; static const struct mtk_wdt_data mt8192_data = …; static const struct mtk_wdt_data mt8195_data = …; /** * toprgu_reset_sw_en_unlocked() - enable/disable software control for reset bit * @data: Pointer to instance of driver data. * @id: Bit number identifying the reset to be enabled or disabled. * @enable: If true, enable software control for that bit, disable otherwise. * * Context: The caller must hold lock of struct mtk_wdt_dev. */ static void toprgu_reset_sw_en_unlocked(struct mtk_wdt_dev *data, unsigned long id, bool enable) { … } static int toprgu_reset_update(struct reset_controller_dev *rcdev, unsigned long id, bool assert) { … } static int toprgu_reset_assert(struct reset_controller_dev *rcdev, unsigned long id) { … } static int toprgu_reset_deassert(struct reset_controller_dev *rcdev, unsigned long id) { … } static int toprgu_reset(struct reset_controller_dev *rcdev, unsigned long id) { … } static const struct reset_control_ops toprgu_reset_ops = …; static int toprgu_register_reset_controller(struct platform_device *pdev, int rst_num) { … } static int mtk_wdt_restart(struct watchdog_device *wdt_dev, unsigned long action, void *data) { … } static int mtk_wdt_ping(struct watchdog_device *wdt_dev) { … } static int mtk_wdt_set_timeout(struct watchdog_device *wdt_dev, unsigned int timeout) { … } static void mtk_wdt_init(struct watchdog_device *wdt_dev) { … } static int mtk_wdt_stop(struct watchdog_device *wdt_dev) { … } static int mtk_wdt_start(struct watchdog_device *wdt_dev) { … } static int mtk_wdt_set_pretimeout(struct watchdog_device *wdd, unsigned int timeout) { … } static irqreturn_t mtk_wdt_isr(int irq, void *arg) { … } static const struct watchdog_info mtk_wdt_info = …; static const struct watchdog_info mtk_wdt_pt_info = …; static const struct watchdog_ops mtk_wdt_ops = …; static int mtk_wdt_probe(struct platform_device *pdev) { … } static int mtk_wdt_suspend(struct device *dev) { … } static int mtk_wdt_resume(struct device *dev) { … } static const struct of_device_id mtk_wdt_dt_ids[] = …; MODULE_DEVICE_TABLE(of, mtk_wdt_dt_ids); static DEFINE_SIMPLE_DEV_PM_OPS(mtk_wdt_pm_ops, mtk_wdt_suspend, mtk_wdt_resume); static struct platform_driver mtk_wdt_driver = …; module_platform_driver(…) …; module_param(timeout, uint, 0); MODULE_PARM_DESC(…) …; module_param(nowayout, bool, 0); MODULE_PARM_DESC(…) …; MODULE_LICENSE(…) …; MODULE_AUTHOR(…) …; MODULE_DESCRIPTION(…) …; MODULE_VERSION(…);
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