From: Sumit Garg <[email protected]> Add support for OP-TEE live tree DT fixup support which enables U-Boot OP-TEE driver to be probed. As well as the EFI DT fixup protocol allows the live tree fixup to be carried over to the OS for the OP-TEE driver in the OS to probe as well.
Note that this fixup only gets applied if OP-TEE support is detected via checking for OP-TEE message UID. Signed-off-by: Sumit Garg <[email protected]> --- arch/arm/mach-snapdragon/of_fixup.c | 35 +++++++++++++++++++++++++++++ 1 file changed, 35 insertions(+) diff --git a/arch/arm/mach-snapdragon/of_fixup.c b/arch/arm/mach-snapdragon/of_fixup.c index 5b6076ea8e5..3d19449f133 100644 --- a/arch/arm/mach-snapdragon/of_fixup.c +++ b/arch/arm/mach-snapdragon/of_fixup.c @@ -25,6 +25,7 @@ #include <fdt_support.h> #include <linux/errno.h> #include <stdlib.h> +#include <tee/optee.h> #include <time.h> /* U-Boot only supports USB high-speed mode on Qualcomm platforms with DWC3 @@ -164,6 +165,37 @@ static void fixup_power_domains(struct device_node *root) } } +static void add_optee_node(struct device_node *root) +{ + struct device_node *fw = NULL, *optee = NULL; + int ret; + + fw = of_find_node_by_path("/firmware"); + if (!fw) { + log_err("Failed to find /firmware node\n"); + return; + } + + ret = of_add_subnode(fw, "optee", strlen("optee") + 1, &optee); + if (ret) { + log_err("Failed to add 'maximum-speed' property: %d\n", ret); + return; + } + + ret = of_write_prop(optee, "compatible", strlen("linaro,optee-tz") + 1, + "linaro,optee-tz"); + if (ret) { + log_err("Failed to optee 'compatible' property: %d\n", ret); + return; + } + + ret = of_write_prop(optee, "method", strlen("smc") + 1, "smc"); + if (ret) { + log_err("Failed to optee 'method' property: %d\n", ret); + return; + } +} + #define time_call(func, ...) \ do { \ u64 start = timer_get_us(); \ @@ -178,6 +210,9 @@ static int qcom_of_fixup_nodes(void * __maybe_unused ctx, struct event *event) time_call(fixup_usb_nodes, root); time_call(fixup_power_domains, root); + if (is_optee_smc_api()) + time_call(add_optee_node, root); + return 0; } -- 2.51.0
