[PATCH v22 07/13] power: reset: Add psci-reboot-mode driver

[Shivendra Pratap]

On 18-05-2026 14:28, Bartosz Golaszewski wrote:
> On Thu, 14 May 2026 16:25:48 +0200, Shivendra Pratap
> <shivendra.pratap at oss.qualcomm.com> said:
>> PSCI supports different types of resets like SYSTEM_RESET, SYSTEM_RESET2
>> ARCH WARM reset and SYSTEM_RESET2 vendor-specific resets. Currently
>> there is no common driver that handles all supported psci resets at one
>> place. Additionally, there is no common mechanism to issue the supported
>> psci resets from userspace.
>>
>> Add a psci-reboot-mode driver, and define two types of PSCI resets,
>> predefined-resets and vendor-specific resets. Predefined-resets are
>> defined by psci driver and vendor-specific resets are defined by SoC
>> vendors, under the psci:reboot-mode node of SoC device tree.
>>
>> Register the driver with the reboot-mode framework to interface these
>> resets to userspace. When userspace initiates a supported command, pass
>> the reset arguments to the PSCI driver to enable command-based reset.
>>
>> This change allows userspace to issue supported PSCI reset commands
>> using the standard reboot system calls while enabling SoC vendors to
>> define their specific resets for PSCI.
>>
>> Signed-off-by: Shivendra Pratap <shivendra.pratap at oss.qualcomm.com>
>> ---
>>   MAINTAINERS                            |  1 +
>>   drivers/power/reset/Kconfig            | 10 +++++
>>   drivers/power/reset/Makefile           |  1 +
>>   drivers/power/reset/psci-reboot-mode.c | 72 ++++++++++++++++++++++++++++++++++
>>   4 files changed, 84 insertions(+)
>>
>> diff --git a/MAINTAINERS b/MAINTAINERS
>> index 36ba42209c0b332813a296880cd55798a5592d2a..4b0815c31679550f5ab719de4a5852990c7cc643 100644
>> --- a/MAINTAINERS
>> +++ b/MAINTAINERS
>> @@ -21342,6 +21342,7 @@ S:	Maintained
>>   F:	Documentation/devicetree/bindings/arm/psci.yaml
>>   F:	drivers/firmware/psci/
>>   F:	drivers/mfd/psci-mfd.c
>> +F:	drivers/power/reset/psci-reboot-mode.c
>>   F:	include/linux/psci.h
>>   F:	include/uapi/linux/psci.h
>>
>> diff --git a/drivers/power/reset/Kconfig b/drivers/power/reset/Kconfig
>> index 124afb99febe92450b6ae322aeed3b63fa2070df..d9d1f768b8691abc3b32f2675519f2ddbaf19b84 100644
>> --- a/drivers/power/reset/Kconfig
>> +++ b/drivers/power/reset/Kconfig
>> @@ -348,6 +348,16 @@ config NVMEM_REBOOT_MODE
>>   	  then the bootloader can read it and take different
>>   	  action according to the mode.
>>
>> +config PSCI_REBOOT_MODE
>> +	bool "PSCI reboot mode driver"
>> +	depends on OF && ARM_PSCI_FW
> 
> Can you add COMPILE_TEST coverage here too please?

Ack. thanks.

> 
>> +	select REBOOT_MODE
>> +	help
>> +	  Say y here will enable PSCI reboot mode driver. This gets
>> +	  the PSCI reboot mode arguments and passes them to psci
>> +	  driver. psci driver uses these arguments for issuing
>> +	  device reset into different boot states.
>> +
>>   config POWER_MLXBF
>>   	tristate "Mellanox BlueField power handling driver"
>>   	depends on (GPIO_MLXBF2 || GPIO_MLXBF3) && ACPI
[SNIP..]

>> +static struct platform_driver psci_reboot_mode_driver = {
>> +	.probe  = psci_reboot_mode_probe,
>> +	.driver = {
>> +		.name	= "psci-reboot-mode",
>> +	},
>> +};
>> +
> 
> You can drop the newline here.

Ack.

thanks,
Shivendra