> Subject: [PATCH] imx8m: soc: cope with existing optee node > > On i.MX8M SoCs, the /firmware/optee Devicetree node is created just > before booting the OS when OP-TEE is found running. If the node > already exists, this results in an error, which prevents the OS to boot: > > Could not create optee node. > ERROR: system-specific fdt fixup failed: FDT_ERR_EXISTS > - must RESET the board to recover. > > failed to process device tree > > On the i.MX8M systems where CONFIG_OF_SYSTEM_SETUP is defined, > the > ft_add_optee_node() function is called before booting the OS. It will > create the OP-TEE Devicetree node and populate it with reserved > memory informations gathered at runtime. > > On on most i.MX8M systems the Devicetree is built with an optee node > if CONFIG_OPTEE is defined. This node is indeed necessary for > commands and drivers communicating with OP-TEE, even before > attempting OS boot. > > The aforementioned issue can happen on the Compulab IOT-GATE- > iMX8, which is the only in-tree i.MX8M system where both > CONFIG_OPTEE and CONFIG_OF_SYSTEM_SETUP are defined (see the > imx8mm-cl-iot-gate* defconfigs). > > Deal with an existing optee node gracefully at runtime to fix this issue. > > Signed-off-by: Vincent Stehlé <vincent.ste...@arm.com> > Cc: Stefano Babic <sba...@denx.de> > Cc: Fabio Estevam <feste...@gmail.com> > Cc: Tom Rini <tr...@konsulko.com> > Cc: Tim Harvey <thar...@gateworks.com>
Reviewed-by: Peng Fan <peng....@nxp.com>
