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https://github.com/zephyrproject-rtos/zephyr
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8fa2f82524
Basic Watchdog driver for Atmel SAM family MCUs. Currently only disabling the watchdog is supported. Tested on Atmel SAMV71 Xplained Ultra Evaluation Kit. Origin: Original Jira: ZEP-1684 Change-Id: I8f717c7f53aa290c944b7935e0570c2a6f53956e Signed-off-by: Souvik K Chakravarty <souvik.k.chakravarty@intel.com>
95 lines
2.0 KiB
C
95 lines
2.0 KiB
C
/*
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* Copyright (C) 2017 Intel Deutschland GmbH
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*
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* SPDX-License-Identifier: Apache-2.0
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*/
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/**
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* @brief Watchdog (WDT) Driver for Atmel SAM MCUs
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*
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* Note:
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* - Once the watchdog disable bit is set, it cannot be cleared till next
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* power reset, i.e, the watchdog cannot be started once stopped.
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* - Since the MCU boots with WDT enabled, only basic feature (disable) is
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* currently implemented for systems that don't need watchdog functionality.
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*
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*/
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#include <watchdog.h>
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#include <soc.h>
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#define SYS_LOG_DOMAIN "dev/wdt_sam"
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#include <logging/sys_log.h>
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/* Device constant configuration parameters */
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struct wdt_sam_dev_cfg {
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Wdt *regs;
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};
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#define DEV_CFG(dev) \
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((const struct wdt_sam_dev_cfg *const)(dev)->config->config_info)
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static void wdt_sam_enable(struct device *dev)
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{
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ARG_UNUSED(dev);
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SYS_LOG_ERR("Function not implemented!");
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}
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static void wdt_sam_disable(struct device *dev)
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{
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Wdt *const wdt = DEV_CFG(dev)->regs;
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wdt->WDT_MR |= WDT_MR_WDDIS;
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}
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static int wdt_sam_set_config(struct device *dev, struct wdt_config *config)
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{
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ARG_UNUSED(dev);
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ARG_UNUSED(config);
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SYS_LOG_ERR("Function not implemented!");
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return -ENOTSUP;
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}
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static void wdt_sam_get_config(struct device *dev, struct wdt_config *config)
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{
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ARG_UNUSED(dev);
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ARG_UNUSED(config);
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SYS_LOG_ERR("Function not implemented!");
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}
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static void wdt_sam_reload(struct device *dev)
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{
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ARG_UNUSED(dev);
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SYS_LOG_ERR("Function not implemented!");
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}
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static const struct wdt_driver_api wdt_sam_api = {
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.enable = wdt_sam_enable,
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.disable = wdt_sam_disable,
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.get_config = wdt_sam_get_config,
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.set_config = wdt_sam_set_config,
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.reload = wdt_sam_reload
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};
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static int wdt_sam_init(struct device *dev)
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{
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#ifdef CONFIG_WDT_SAM_DISABLE_AT_BOOT
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wdt_sam_disable(dev);
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#endif
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return 0;
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}
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static const struct wdt_sam_dev_cfg wdt_sam_config = {
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.regs = WDT
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};
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DEVICE_AND_API_INIT(wdt_sam, CONFIG_WDT_SAM_DEVICE_NAME, wdt_sam_init,
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NULL, &wdt_sam_config,
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PRE_KERNEL_1, CONFIG_KERNEL_INIT_PRIORITY_DEVICE,
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&wdt_sam_api);
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