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drivers: watchdog: add watchdog driver for RTS5817
Add watchdog driver for RTS5817 Signed-off-by: Darcy Lu <darcy_lu@realsil.com.cn>
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‎drivers/watchdog/CMakeLists.txt

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@@ -53,6 +53,7 @@ zephyr_library_sources_ifdef(CONFIG_WDT_XMC4XXX wdt_xmc4xxx.c)
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zephyr_library_sources_ifdef(CONFIG_WWDT_NUMAKER wdt_wwdt_numaker.c)
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zephyr_library_sources_ifdef(CONFIG_WDT_ENE_KB1200 wdt_ene_kb1200.c)
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zephyr_library_sources_ifdef(CONFIG_WDT_IWDG_WCH wdt_iwdg_wch.c)
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zephyr_library_sources_ifdef(CONFIG_WDT_RTS5817 wdt_rts5817.c)
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zephyr_library_sources_ifdef(CONFIG_WDT_DW wdt_dw.c wdt_dw_common.c)
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zephyr_library_sources_ifdef(CONFIG_WDT_INTEL_ADSP wdt_intel_adsp.c wdt_dw_common.c)

‎drivers/watchdog/Kconfig

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@@ -157,4 +157,6 @@ source "drivers/watchdog/Kconfig.wch"
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source "drivers/watchdog/Kconfig.nxp_ewm"
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source "drivers/watchdog/Kconfig.rts5817"
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endif # WATCHDOG

‎drivers/watchdog/Kconfig.rts5817

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# Copyright (c) 2024 Realtek Semiconductor, Inc.
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# SPDX-License-Identifier: Apache-2.0
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config WDT_RTS5817
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bool "Realtek RTS5817 Watchdog driver"
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default y
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depends on DT_HAS_REALTEK_RTS5817_WATCHDOG_ENABLED
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select HAS_WDT_DISABLE_AT_BOOT
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help
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Realtek RTS5817 watchdog driver.

‎drivers/watchdog/wdt_rts5817.c

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/*
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* Copyright (c) 2024 Realtek Semiconductor, Inc.
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*
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* SPDX-License-Identifier: Apache-2.0
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*/
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#define DT_DRV_COMPAT realtek_rts5817_watchdog
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#include <zephyr/kernel.h>
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#include <zephyr/drivers/watchdog.h>
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#include "wdt_rts5817.h"
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#define LOG_LEVEL CONFIG_WDT_LOG_LEVEL
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#include <zephyr/logging/log.h>
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LOG_MODULE_REGISTER(wdt_rts5817);
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#define WDOG_TIME_1S 0x0
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#define WDOG_TIME_2S 0x1
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#define WDOG_TIME_4S 0x2
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#define WDOG_TIME_8S 0x3
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struct rts_fp_wdt_config {
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mem_addr_t base;
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};
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static inline uint32_t rts_fp_read_reg(const struct device *dev)
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{
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const struct rts_fp_wdt_config *config = dev->config;
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return sys_read32(config->base);
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}
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static inline void rts_fp_write_reg(const struct device *dev, uint32_t value)
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{
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const struct rts_fp_wdt_config *config = dev->config;
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sys_write32(value, config->base);
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}
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static int rts_fp_wdt_setup(const struct device *dev, uint8_t options)
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{
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uint32_t value;
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if ((options & WDT_OPT_PAUSE_IN_SLEEP) || (options & WDT_OPT_PAUSE_HALTED_BY_DBG)) {
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LOG_ERR("Pause in sleep or halted by dbg is not supported");
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return -ENOTSUP;
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}
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value = rts_fp_read_reg(dev);
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value |= WDOG_EN;
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rts_fp_write_reg(dev, value);
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return 0;
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}
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static int rts_fp_wdt_disable(const struct device *dev)
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{
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uint32_t value;
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value = rts_fp_read_reg(dev);
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value &= ~WDOG_EN;
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rts_fp_write_reg(dev, value);
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return 0;
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}
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static int rts_fp_wdt_install_timeout(const struct device *dev, const struct wdt_timeout_cfg *cfg)
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{
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uint32_t value;
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if (cfg->window.min > 0 || cfg->window.max > 8000) {
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LOG_ERR("watchdog window.min should be equal to 0 and window.max should not exceed "
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"8000");
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return -ENOTSUP;
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}
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/* Set mode of watchdog and callback */
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switch (cfg->flags) {
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case WDT_FLAG_RESET_NONE:
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break;
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case WDT_FLAG_RESET_CPU_CORE:
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case WDT_FLAG_RESET_SOC:
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if (cfg->callback != NULL) {
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LOG_ERR("watchdog callback is not supported");
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return -ENOTSUP;
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}
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value = rts_fp_read_reg(dev);
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value &= ~WDOG_TIME_MASK;
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if (cfg->window.max <= 1000) {
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value |= WDOG_TIME_1S << WDOG_TIME_OFFSET;
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} else if (cfg->window.max > 1000 && cfg->window.max <= 2000) {
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value |= WDOG_TIME_2S << WDOG_TIME_OFFSET;
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} else if (cfg->window.max > 2000 && cfg->window.max <= 4000) {
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value |= WDOG_TIME_4S << WDOG_TIME_OFFSET;
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} else if (cfg->window.max > 4000 && cfg->window.max <= 8000) {
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value |= WDOG_TIME_8S << WDOG_TIME_OFFSET;
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} else {
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return -ENOTSUP;
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}
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rts_fp_write_reg(dev, value);
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break;
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default:
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LOG_ERR("unknown watchdog flags");
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return -EINVAL;
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}
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return 0;
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}
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static int rts_fp_wdt_feed(const struct device *dev, int channel_id)
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{
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uint32_t value;
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value = rts_fp_read_reg(dev);
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value |= WDOG_CLR;
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rts_fp_write_reg(dev, value);
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return 0;
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}
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static int rts_fp_wdt_init(const struct device *dev)
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{
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/* Note: Watchdog is enabled by default for rts5817.
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* so CONFIG_WDT_DISABLE_AT_BOOT needs to be selected by default
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*/
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if (IS_ENABLED(CONFIG_WDT_DISABLE_AT_BOOT)) {
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rts_fp_wdt_disable(dev);
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}
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return 0;
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}
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static const struct wdt_driver_api rts_fp_wdt_driver_api = {
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.setup = rts_fp_wdt_setup,
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.disable = rts_fp_wdt_disable,
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.install_timeout = rts_fp_wdt_install_timeout,
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.feed = rts_fp_wdt_feed,
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};
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const struct rts_fp_wdt_config rts_fp_config = {
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.base = DT_INST_REG_ADDR(0),
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};
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DEVICE_DT_INST_DEFINE(0, &rts_fp_wdt_init, NULL, NULL, &rts_fp_config, PRE_KERNEL_1,
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CONFIG_KERNEL_INIT_PRIORITY_DEFAULT, &rts_fp_wdt_driver_api);

‎drivers/watchdog/wdt_rts5817.h

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/*
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* Copyright (c) 2024 Realtek Semiconductor, Inc.
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*
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* SPDX-License-Identifier: Apache-2.0
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*/
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#ifndef ZEPHYR_DRIVERS_WATCHDOG_WDT_RTS_RTS5817_H_
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#define ZEPHYR_DRIVERS_WATCHDOG_WDT_RTS_RTS5817_H_
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/* Bits of R_WTDG_CTRL (0X0048) */
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#define WDOG_EN_OFFSET 0
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#define WDOG_EN_BITS 1
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#define WDOG_EN_MASK (((1 << 1) - 1) << 0)
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#define WDOG_EN (WDOG_EN_MASK)
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#define WDOG_CLR_OFFSET 1
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#define WDOG_CLR_BITS 1
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#define WDOG_CLR_MASK (((1 << 1) - 1) << 1)
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#define WDOG_CLR (WDOG_CLR_MASK)
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#define WDOG_TIME_OFFSET 2
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#define WDOG_TIME_BITS 2
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#define WDOG_TIME_MASK (((1 << 2) - 1) << 2)
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#define WDOG_TIME (WDOG_TIME_MASK)
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#define WDOG_REG_RST_EN_OFFSET 4
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#define WDOG_REG_RST_EN_BITS 1
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#define WDOG_REG_RST_EN_MASK (((1 << 1) - 1) << 4)
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#define WDOG_REG_RST_EN (WDOG_REG_RST_EN_MASK)
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#define WDOG_BUS_RST_EN_OFFSET 5
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#define WDOG_BUS_RST_EN_BITS 1
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#define WDOG_BUS_RST_EN_MASK (((1 << 1) - 1) << 5)
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#define WDOG_BUS_RST_EN (WDOG_BUS_RST_EN_MASK)
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#define WDOG_INT_EN_OFFSET 6
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#define WDOG_INT_EN_BITS 1
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#define WDOG_INT_EN_MASK (((1 << 1) - 1) << 6)
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#define WDOG_INT_EN (WDOG_INT_EN_MASK)
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#define WDOG_INT_CLR_OFFSET 7
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#define WDOG_INT_CLR_BITS 1
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#define WDOG_INT_CLR_MASK (((1 << 1) - 1) << 7)
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#define WDOG_INT_CLR (WDOG_INT_CLR_MASK)
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#define WDOG_INT_OFFSET 8
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#define WDOG_INT_BITS 1
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#define WDOG_INT_MASK (((1 << 1) - 1) << 8)
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#define WDOG_INT (WDOG_INT_MASK)
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#define WDOG_INT_SEL_OFFSET 9
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#define WDOG_INT_SEL_BITS 1
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#define WDOG_INT_SEL_MASK (((1 << 1) - 1) << 9)
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#define WDOG_INT_SEL (WDOG_INT_SEL_MASK)
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#define WDOG_CNT_OFFSET 16
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#define WDOG_CNT_BITS 16
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#define WDOG_CNT_MASK (((1 << 16) - 1) << 16)
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#define WDOG_CNT (WDOG_CNT_MASK)
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#endif /* ZEPHYR_DRIVERS_WATCHDOG_WDT_RTS_RTS5817_H_ */

‎dts/arm/realtek/fingerprint/rts5817/rts5817_base.dtsi

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#size-cells = <1>;
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status = "okay";
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};
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watchdog: watchdog@40100048 {
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compatible = "realtek,rts5817-watchdog";
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reg = <0x40100048 0x4>;
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status = "disabled";
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};
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};
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};
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‎dts/bindings/watchdog/realtek,rts5817-watchdog.yaml

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# Copyright (c) 2024 Realtek Semiconductor, Inc.
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# SPDX-License-Identifier: Apache-2.0
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description: |
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Realtek RTS5817 Watchdog driver
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compatible: "realtek,rts5817-watchdog"
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include: base.yaml
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properties:
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reg:
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required: true

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