From: Arnd Bergmann Date: Wed, 1 Apr 2026 21:49:16 +0000 (+0200) Subject: Merge tag 'stm32-bus-firewall-for-7.1-1' of git://git.kernel.org/pub/scm/linux/kernel... X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=dc26ea325f9c8d264bffd7d7600a31d01065302d;p=thirdparty%2Fkernel%2Flinux.git Merge tag 'stm32-bus-firewall-for-7.1-1' of git://git.kernel.org/pub/scm/linux/kernel/git/atorgue/stm32 into soc/drivers STM32 Firewall bus for v7.1, round 1 Highlights: ---------- Stm32 SoCs embed debug peripherals such as Coresight. These peripherals can monitor the activity of the cores. Because of that, they can be used only if some features in the debug configuration are enabled. Else, errors or firewall exceptions can be observed. Similarly to the ETZPC(on stm32mp1x platforms) or the RIFSC(on stm32mp2x platforms), debug-related peripherals access can be assessed at bus level to prevent these issues from happening. The debug configuration can only be accessed by the secure world. That means that a service must be implemented in the secure world for the kernel to check the firewall configuration. On OpenSTLinux, it is done through a Debug access PTA in OP-TEE [1]. To represent the debug peripherals present on a dedicated debug bus, create a debug bus node in the device tree and the associated driver that will interact with this PTA. Plus some fixes. * tag 'stm32-bus-firewall-for-7.1-1' of git://git.kernel.org/pub/scm/linux/kernel/git/atorgue/stm32: pinctrl: stm32: add firewall checks before probing the HDP driver drivers: bus: add the stm32 debug bus driver bus: stm32_firewall: add stm32_firewall_get_grant_all_access() API bus: stm32_firewall: allow check on different firewall controllers dt-bindings: bus: document the stm32 debug bus dt-bindings: pinctrl: document access-controllers property for stm32 HDP dt-bindings: document access-controllers property for coresight peripherals bus: rifsc: fix RIF configuration check for peripherals bus: rifsc: Replace snprintf("%s") with strscpy bus: stm32_firewall: Simplify with scoped for each OF child loop bus: firewall: move stm32_firewall header file in include folder Signed-off-by: Arnd Bergmann --- dc26ea325f9c8d264bffd7d7600a31d01065302d