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imx8: fdt: add optee node

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Add OP-TEE device tree node for Linux according to args passed from ATF.
If ATF has been built with OP-TEE running, boot_pointer[1] will indicate
that.

Signed-off-by: Peng Fan <peng.fan@nxp.com>
This commit is contained in:
Peng Fan 2019-08-26 08:12:13 +00:00 committed by Stefano Babic
parent fefe051335
commit 94e4d028b2
1 changed files with 51 additions and 1 deletions
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52
arch/arm/mach-imx/imx8/fdt.c
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@ -226,6 +226,56 @@ static int config_smmu_fdt(void *blob)
return 0;
}
static int ft_add_optee_node(void *fdt, bd_t *bd)
{
const char *path, *subpath;
int offs;
/*
* No TEE space allocated indicating no TEE running, so no
* need to add optee node in dts
*/
if (!boot_pointer[1])
return 0;
offs = fdt_increase_size(fdt, 512);
if (offs) {
printf("No Space for dtb\n");
return 1;
}
path = "/firmware";
offs = fdt_path_offset(fdt, path);
if (offs < 0) {
path = "/";
offs = fdt_path_offset(fdt, path);
if (offs < 0) {
printf("Could not find root node.\n");
return offs;
}
subpath = "firmware";
offs = fdt_add_subnode(fdt, offs, subpath);
if (offs < 0) {
printf("Could not create %s node.\n", subpath);
return offs;
}
}
subpath = "optee";
offs = fdt_add_subnode(fdt, offs, subpath);
if (offs < 0) {
printf("Could not create %s node.\n", subpath);
return offs;
}
fdt_setprop_string(fdt, offs, "compatible", "linaro,optee-tz");
fdt_setprop_string(fdt, offs, "method", "smc");
return 0;
}
int ft_system_setup(void *blob, bd_t *bd)
{
int ret;
@ -238,5 +288,5 @@ int ft_system_setup(void *blob, bd_t *bd)
return ret;
}
return 0;
return ft_add_optee_node(blob, bd);
}