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/linux/Documentation/devicetree/bindings/watchdog/
H A Dst,stm32-iwdg.yaml1 # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
3 ---
4 $id: http://devicetree.org/schemas/watchdog/st,stm32-iwdg.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
7 title: STMicroelectronics STM32 Independent WatchDoG (IWDG)
10 - Yannick Fertre <yannick.fertre@foss.st.com>
11 - Christophe Roullier <christophe.roullier@foss.st.com>
14 - $ref: watchdog.yaml#
19 - st,stm32-iwdg
20 - st,stm32mp1-iwdg
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/linux/drivers/watchdog/
H A Dstm32_iwdg.c1 // SPDX-License-Identifier: GPL-2.0
26 /* IWDG registers */
32 #define IWDG_EWCR 0x14 /* Early Wake-up Register */
103 dev_dbg(wdd->parent, "%s\n", __func__); in stm32_iwdg_start()
105 if (!wdd->pretimeout) in stm32_iwdg_start()
106 wdd->pretimeout = 3 * wdd->timeout / 4; in stm32_iwdg_start()
108 tout = clamp_t(unsigned int, wdd->timeout, in stm32_iwdg_start()
109 wdd->min_timeout, wdd->max_hw_heartbeat_ms / 1000); in stm32_iwdg_start()
110 ptot = clamp_t(unsigned int, tout - wdd->pretimeout, in stm32_iwdg_start()
111 wdd->min_timeout, tout); in stm32_iwdg_start()
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