From 796cba2dd4d9fb72c2de8fceb4e5c67a6f3c3f9a Mon Sep 17 00:00:00 2001 From: Laurentiu Mihalcea Date: Tue, 10 Jun 2025 12:01:49 -0400 Subject: bus: add driver for IMX AIPSTZ bridge The secure AHB to IP Slave (AIPSTZ) bus bridge provides access control configurations meant to restrict access to certain peripherals. Some of the configurations include: 1) Marking masters as trusted for R/W. Based on this (and the configuration of the accessed peripheral), the bridge may choose to abort the R/W transactions issued by certain masters. 2) Allowing/disallowing write accesses to peripherals. Add driver for this IP. Since there's currently no framework for access controllers (and since there's currently no need for having flexibility w.r.t the configurations) all this driver does is it applies a relaxed, "default" configuration, in which all masters are trusted for R/W. Note that some instances of this IP (e.g: AIPSTZ5 on i.MX8MP) may be tied to a power domain and may lose their configuration when the domain is powered off. This is why the configuration has to be restored when the domain is powered on. Co-developed-by: Daniel Baluta Signed-off-by: Daniel Baluta Signed-off-by: Laurentiu Mihalcea Signed-off-by: Shawn Guo --- drivers/bus/Kconfig | 6 ++++++ 1 file changed, 6 insertions(+) (limited to 'drivers/bus/Kconfig') diff --git a/drivers/bus/Kconfig b/drivers/bus/Kconfig index ff669a8ccad9..fe7600283e70 100644 --- a/drivers/bus/Kconfig +++ b/drivers/bus/Kconfig @@ -87,6 +87,12 @@ config HISILICON_LPC Driver to enable I/O access to devices attached to the Low Pin Count bus on the HiSilicon Hip06/7 SoC. +config IMX_AIPSTZ + tristate "Support for IMX Secure AHB to IP Slave bus (AIPSTZ) bridge" + depends on ARCH_MXC + help + Enable support for IMX AIPSTZ bridge. + config IMX_WEIM bool "Freescale EIM DRIVER" depends on ARCH_MXC || COMPILE_TEST -- cgit v1.2.3