watchdog: Introduce mcux wdog shim driver
Adds a shim layer around the mcux kinetis wdog driver to adapt it to the zephyr watchdog interface. Signed-off-by: Maureen Helm <maureen.helm@nxp.com>
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7960f79134
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5 changed files with 204 additions and 0 deletions
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@ -5,3 +5,4 @@ zephyr_sources_ifdef(CONFIG_WDT_SAM wdt_sam.c)
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zephyr_sources_ifdef(CONFIG_WDT_ESP32 wdt_esp32.c)
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zephyr_sources_ifdef(CONFIG_WDT_SAM0 wdt_sam0.c)
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zephyr_sources_ifdef(CONFIG_WDT_NRFX wdt_nrfx.c)
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zephyr_sources_ifdef(CONFIG_WDT_MCUX_WDOG wdt_mcux_wdog.c)
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@ -59,4 +59,6 @@ source "drivers/watchdog/Kconfig.sam0"
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source "drivers/watchdog/Kconfig.nrfx"
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source "drivers/watchdog/Kconfig.mcux_wdog"
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endif
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14
drivers/watchdog/Kconfig.mcux_wdog
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14
drivers/watchdog/Kconfig.mcux_wdog
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@ -0,0 +1,14 @@
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# Kconfig - Watchdog configuration options
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#
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# Copyright (c) 2018, NXP
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#
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# SPDX-License-Identifier: Apache-2.0
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#
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menuconfig WDT_MCUX_WDOG
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bool "MCUX WDOG driver"
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depends on HAS_MCUX && CLOCK_CONTROL
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select HAS_DTS_WDT
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default n
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help
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Enable the mcux wdog driver.
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186
drivers/watchdog/wdt_mcux_wdog.c
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186
drivers/watchdog/wdt_mcux_wdog.c
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@ -0,0 +1,186 @@
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/*
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*
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* Copyright (c) 2018, NXP
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* SPDX-License-Identifier: Apache-2.0
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*/
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#include <watchdog.h>
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#include <clock_control.h>
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#include <fsl_wdog.h>
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#define SYS_LOG_LEVEL CONFIG_SYS_LOG_WDT_LEVEL
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#include <logging/sys_log.h>
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#define MIN_TIMEOUT 4
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struct mcux_wdog_config {
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WDOG_Type *base;
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char *clock_name;
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clock_control_subsys_t clock_subsys;
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void (*irq_config_func)(struct device *dev);
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};
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struct mcux_wdog_data {
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wdt_callback_t callback;
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wdog_config_t wdog_config;
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bool timeout_valid;
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};
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static int mcux_wdog_setup(struct device *dev, u8_t options)
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{
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const struct mcux_wdog_config *config = dev->config->config_info;
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struct mcux_wdog_data *data = dev->driver_data;
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WDOG_Type *base = config->base;
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if (!data->timeout_valid) {
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SYS_LOG_ERR("No valid timeouts installed");
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return -EINVAL;
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}
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data->wdog_config.workMode.enableStop =
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(options & WDT_OPT_PAUSE_IN_SLEEP) == 0;
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data->wdog_config.workMode.enableDebug =
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(options & WDT_OPT_PAUSE_HALTED_BY_DBG) == 0;
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WDOG_Init(base, &data->wdog_config);
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SYS_LOG_DBG("Setup the watchdog");
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return 0;
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}
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static int mcux_wdog_disable(struct device *dev)
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{
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const struct mcux_wdog_config *config = dev->config->config_info;
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struct mcux_wdog_data *data = dev->driver_data;
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WDOG_Type *base = config->base;
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WDOG_Deinit(base);
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data->timeout_valid = false;
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SYS_LOG_DBG("Disabled the watchdog");
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return 0;
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}
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static int mcux_wdog_install_timeout(struct device *dev,
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const struct wdt_timeout_cfg *cfg)
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{
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const struct mcux_wdog_config *config = dev->config->config_info;
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struct mcux_wdog_data *data = dev->driver_data;
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struct device *clock_dev;
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u32_t clock_freq;
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if (data->timeout_valid) {
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SYS_LOG_ERR("No more timeouts can be installed");
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return -ENOMEM;
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}
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clock_dev = device_get_binding(config->clock_name);
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if (clock_dev == NULL) {
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return -EINVAL;
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}
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if (clock_control_get_rate(clock_dev, config->clock_subsys,
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&clock_freq)) {
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return -EINVAL;
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}
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WDOG_GetDefaultConfig(&data->wdog_config);
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data->wdog_config.timeoutValue = clock_freq * cfg->window.max / 1000;
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if (cfg->window.min) {
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data->wdog_config.enableWindowMode = true;
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data->wdog_config.windowValue =
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clock_freq * cfg->window.min / 1000;
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} else {
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data->wdog_config.enableWindowMode = false;
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data->wdog_config.windowValue = 0;
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}
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if ((data->wdog_config.timeoutValue < MIN_TIMEOUT) ||
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(data->wdog_config.timeoutValue < data->wdog_config.windowValue)) {
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SYS_LOG_ERR("Invalid timeout");
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return -EINVAL;
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}
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data->wdog_config.clockSource = kWDOG_LpoClockSource;
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data->wdog_config.enableInterrupt = cfg->callback != NULL;
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data->callback = cfg->callback;
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data->timeout_valid = true;
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return 0;
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}
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static int mcux_wdog_feed(struct device *dev, int channel_id)
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{
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const struct mcux_wdog_config *config = dev->config->config_info;
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WDOG_Type *base = config->base;
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if (channel_id != 0) {
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SYS_LOG_ERR("Invalid channel id");
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return -EINVAL;
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}
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WDOG_Refresh(base);
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SYS_LOG_DBG("Fed the watchdog");
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return 0;
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}
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static void mcux_wdog_isr(void *arg)
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{
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struct device *dev = (struct device *)arg;
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const struct mcux_wdog_config *config = dev->config->config_info;
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struct mcux_wdog_data *data = dev->driver_data;
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WDOG_Type *base = config->base;
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u32_t flags;
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flags = WDOG_GetStatusFlags(base);
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WDOG_ClearStatusFlags(base, flags);
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if (data->callback) {
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data->callback(dev, 0);
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}
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}
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static int mcux_wdog_init(struct device *dev)
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{
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const struct mcux_wdog_config *config = dev->config->config_info;
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config->irq_config_func(dev);
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return 0;
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}
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static const struct wdt_driver_api mcux_wdog_api = {
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.setup = mcux_wdog_setup,
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.disable = mcux_wdog_disable,
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.install_timeout = mcux_wdog_install_timeout,
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.feed = mcux_wdog_feed,
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};
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static void mcux_wdog_config_func_0(struct device *dev);
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static const struct mcux_wdog_config mcux_wdog_config_0 = {
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.base = (WDOG_Type *) CONFIG_WDT_0_BASE_ADDRESS,
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.clock_name = CONFIG_WDT_0_CLOCK_NAME,
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.clock_subsys = (clock_control_subsys_t) CONFIG_WDT_0_CLOCK_SUBSYS,
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.irq_config_func = mcux_wdog_config_func_0,
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};
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static struct mcux_wdog_data mcux_wdog_data_0;
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DEVICE_AND_API_INIT(mcux_wdog_0, CONFIG_WDT_0_NAME, &mcux_wdog_init,
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&mcux_wdog_data_0, &mcux_wdog_config_0,
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POST_KERNEL, CONFIG_KERNEL_INIT_PRIORITY_DEVICE,
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&mcux_wdog_api);
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static void mcux_wdog_config_func_0(struct device *dev)
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{
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IRQ_CONNECT(CONFIG_WDT_0_IRQ, CONFIG_WDT_0_IRQ_PRI,
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mcux_wdog_isr, DEVICE_GET(mcux_wdog_0), 0);
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irq_enable(CONFIG_WDT_0_IRQ);
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}
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@ -18,3 +18,4 @@ zephyr_sources_ifdef(CONFIG_UART_MCUX fsl_uart.c)
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zephyr_sources_ifdef(CONFIG_UART_MCUX_LPSCI fsl_lpsci.c)
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zephyr_sources_ifdef(CONFIG_UART_MCUX_LPUART fsl_lpuart.c)
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zephyr_sources_ifdef(CONFIG_RTC_MCUX fsl_rtc.c)
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zephyr_sources_ifdef(CONFIG_WDT_MCUX_WDOG fsl_wdog.c)
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