[PATCH v2] arch: arm: mach-k3: Delete tifs node in DT fixup

From: Udit Kumar <u-kumar1@ti.com>
To: <afd@ti.com>, <n-dasan@ti.com>, <n-francis@ti.com>, <nm@ti.com>,
	<trini@konsulko.com>, <u-boot@lists.denx.de>, <vigneshr@ti.com>
Cc: Udit Kumar <u-kumar1@ti.com>
Subject: [PATCH v2] arch: arm: mach-k3: Delete tifs node in DT fixup
Date: Thu, 20 Apr 2023 13:41:28 +0530	[thread overview]
Message-ID: <20230420081128.3617214-1-u-kumar1@ti.com> (raw)
In-Reply-To: <20230419061352.3156023-1-u-kumar1@ti.com>

This patch deletes tifs DT node as part of fixup.

TISCI API reported msmc_size, does not include
64KB reserved size for tifs aka MSMC comms memory.

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 msms_size, and should be deleted
before passing control to OS.

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

Signed-off-by: Udit Kumar <u-kumar1@ti.com>
---
Changes since v1:
https://lore.kernel.org/all/20230419061352.3156023-1-u-kumar1@ti.com/
- moved tifs check above l3 as

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

diff --git a/arch/arm/mach-k3/common.c b/arch/arm/mach-k3/common.c
index a2adb791f6..33b1f10d58 100644
--- a/arch/arm/mach-k3/common.c
+++ b/arch/arm/mach-k3/common.c
@@ -351,6 +351,7 @@ 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

