[PATCH] arch: arm: mach-k3: Delete tifs node in DT fixup

[Udit Kumar]

Delete tifs DT node as part of fixup.

TISCI API reported msmc_size, does not include 64KB reserved size for
tifs aka MSMC comms memory, see documentation[0].

As part of fixup, original code uses TISCI API reported msmc_size as
size for SRAM DT node.

tifs node is similar to l3-cache, which should hold address above
msmc_size, and should be deleted before passing control to OS.

[0] https://software-dl.ti.com/tisci/esd/latest/2_tisci_msgs/general/core.html?highlight=msmc#tisci-msg-query-msmc

Reviewed-by: Neha Malcom Francis <n-francis at ti.com>
Signed-off-by: Udit Kumar <u-kumar1 at ti.com>
---
RFC was sent to k.org with https://lore.kernel.org/all/20230506100826.1525641-1-u-kumar1@ti.com/
So planning to go ahead with option 1.

Changelog:
Changes in v3:
- Collected R/B of v2
- Updated commit message typo

Changes since v2:
- moved tifs check above l3 as

v2: https://lore.kernel.org/all/20230420081128.3617214-1-u-kumar1@ti.com/
v1: https://lore.kernel.org/all/20230419061352.3156023-1-u-kumar1@ti.com/

 arch/arm/mach-k3/common_fdt.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/arch/arm/mach-k3/common_fdt.c b/arch/arm/mach-k3/common_fdt.c
index 3bdedd7b50..4a01671156 100644
--- a/arch/arm/mach-k3/common_fdt.c
+++ b/arch/arm/mach-k3/common_fdt.c
@@ -65,6 +65,7 @@ static int fdt_fixup_msmc_ram(void *blob, char *parent_path, char *node_name)
 		      subnode, addr, size);
 		if (addr + size > msmc_size ||
 		    !strncmp(fdt_get_name(blob, subnode, &len), "sysfw", 5) ||
+		    !strncmp(fdt_get_name(blob, subnode, &len), "tifs", 4)  ||
 		    !strncmp(fdt_get_name(blob, subnode, &len), "l3cache", 7)) {
 			fdt_del_node(blob, subnode);
 			debug("%s: deleting subnode %d\n", __func__, subnode);
-- 
2.34.1