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mach-snapdragon: of_fixup: Add OP-TEE DT fixup support

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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 <sumit.garg@oss.qualcomm.com>
Link: https://patch.msgid.link/20260127062341.723966-3-sumit.garg@kernel.org
Signed-off-by: Casey Connolly <casey.connolly@linaro.org>
This commit is contained in:
Sumit Garg 2026-01-27 11:53:40 +05:30 committed by Casey Connolly
parent 3eefe12b4b
commit 3f3f832bc9
1 changed files with 35 additions and 0 deletions
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35
arch/arm/mach-snapdragon/of_fixup.c
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@ -28,6 +28,7 @@
#include <linux/errno.h>
#include <linker_lists.h>
#include <stdlib.h>
#include <tee/optee.h>
#include <time.h>
/**
@ -228,6 +229,37 @@ static void fixup_usb_nodes(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 'optee' subnode: %d\n", ret);
return;
}
ret = of_write_prop(optee, "compatible", strlen("linaro,optee-tz") + 1,
"linaro,optee-tz");
if (ret) {
log_err("Failed to add optee 'compatible' property: %d\n", ret);
return;
}
ret = of_write_prop(optee, "method", strlen("smc") + 1, "smc");
if (ret) {
log_err("Failed to add optee 'method' property: %d\n", ret);
return;
}
}
#define time_call(func, ...) \
do { \
u64 start = timer_get_us(); \
@ -241,6 +273,9 @@ static int qcom_of_fixup_nodes(void * __maybe_unused ctx, struct event *event)
time_call(fixup_usb_nodes, root);
if (IS_ENABLED(CONFIG_OPTEE) && is_optee_smc_api())
time_call(add_optee_node, root);
return 0;
}