// SPDX-License-Identifier: GPL-2.0 /* * Driver for STM32 Independent Watchdog * * Copyright (C) STMicroelectronics 2017 * Author: Yannick Fertre <[email protected]> for STMicroelectronics. * * This driver is based on tegra_wdt.c * */ #include <linux/clk.h> #include <linux/delay.h> #include <linux/interrupt.h> #include <linux/io.h> #include <linux/iopoll.h> #include <linux/kernel.h> #include <linux/module.h> #include <linux/of.h> #include <linux/platform_device.h> #include <linux/watchdog.h> #define DEFAULT_TIMEOUT … /* IWDG registers */ #define IWDG_KR … #define IWDG_PR … #define IWDG_RLR … #define IWDG_SR … #define IWDG_WINR … /* IWDG_KR register bit mask */ #define KR_KEY_RELOAD … #define KR_KEY_ENABLE … #define KR_KEY_EWA … #define KR_KEY_DWA … /* IWDG_PR register */ #define PR_SHIFT … #define PR_MIN … /* IWDG_RLR register values */ #define RLR_MIN … #define RLR_MAX … /* IWDG_SR register bit mask */ #define SR_PVU … #define SR_RVU … /* set timeout to 100000 us */ #define TIMEOUT_US … #define SLEEP_US … struct stm32_iwdg_data { … }; static const struct stm32_iwdg_data stm32_iwdg_data = …; static const struct stm32_iwdg_data stm32mp1_iwdg_data = …; struct stm32_iwdg { … }; static inline u32 reg_read(void __iomem *base, u32 reg) { … } static inline void reg_write(void __iomem *base, u32 reg, u32 val) { … } static int stm32_iwdg_start(struct watchdog_device *wdd) { … } static int stm32_iwdg_ping(struct watchdog_device *wdd) { … } static int stm32_iwdg_set_timeout(struct watchdog_device *wdd, unsigned int timeout) { … } static void stm32_clk_disable_unprepare(void *data) { … } static int stm32_iwdg_clk_init(struct platform_device *pdev, struct stm32_iwdg *wdt) { … } static const struct watchdog_info stm32_iwdg_info = …; static const struct watchdog_ops stm32_iwdg_ops = …; static const struct of_device_id stm32_iwdg_of_match[] = …; MODULE_DEVICE_TABLE(of, stm32_iwdg_of_match); static int stm32_iwdg_probe(struct platform_device *pdev) { … } static struct platform_driver stm32_iwdg_driver = …; module_platform_driver(…) …; MODULE_AUTHOR(…) …; MODULE_DESCRIPTION(…) …; MODULE_LICENSE(…) …;
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