zephyr/drivers/watchdog/Kconfig.intel_adsp

# Intel ADSP Watchdog configuration options

# Copyright (c) 2023 Intel Corporation
# SPDX-License-Identifier: Apache-2.0

config WDT_INTEL_ADSP
	bool "Intel ADSP Watchdog driver"
	default y
	depends on DT_HAS_INTEL_ADSP_WATCHDOG_ENABLED
	help
	  Intel ADSP Watchdog driver.
drivers: wdt: Add wdt_intel_adsp driver Added a new watchdog driver which can handle a multiple wdt_dw instances and can control the pause signal. The mlt platform has three designware watchdogs, one for each core. I decided to create a separate intel watchdog driver for the following reasons: 1. All three devices share the same interrupt number. Each watchdog reports an interrupt to the core to which it has been assigned. The same interrupt number cannot be used by multiple devices in the device tree. So, it would be assigned to only one device. The other dw watchdog devices would use this assignment, even though it would not be described for them in the dt. The interrupt handler function in dw watchdog checks the interrupt flag. If the interrupt was connected to the first watchdog, and the second or third watchdog signal an interrupt, the interrupt handler of the first device would ignore it because it would not have set the interrupt flag. The watchdog device don't knows anything about the existence of the others devices. 2. The designware watchdog only supports a hardware pause signal. It cannot be paused programmatically. On the mtl platform, there is a separate group of control registers for all per-core watchdogs. There are GPIO-like registers that allows control of a hardware pause signal for subordinate watchdogs. This separate block is shared by all three watchdogs. 3. The base addresses of the subordinate watchdogs are read from the aforementioned control registers. As a result, in the device tree we have only one base address for the intel watchdog, which points to the pause control registers and containing the base addresses of the subordinate devices. Signed-off-by: Adrian Warecki <adrian.warecki@intel.com> 2023-01-10 16:35:17 +08:00			`# Intel ADSP Watchdog configuration options`

			`# Copyright (c) 2023 Intel Corporation`
			`# SPDX-License-Identifier: Apache-2.0`

			`config WDT_INTEL_ADSP`
			`bool "Intel ADSP Watchdog driver"`
			`default y`
			`depends on DT_HAS_INTEL_ADSP_WATCHDOG_ENABLED`
			`help`
			`Intel ADSP Watchdog driver.`