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

[Nishanth Menon]

On 11:43-20230419, Udit Kumar wrote:
> 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 at ti.com>
> ---
>  arch/arm/mach-k3/common.c | 4 +++-
>  1 file changed, 3 insertions(+), 1 deletion(-)
> 
> diff --git a/arch/arm/mach-k3/common.c b/arch/arm/mach-k3/common.c
> index a2adb791f6..4651744821 100644
> --- a/arch/arm/mach-k3/common.c
> +++ b/arch/arm/mach-k3/common.c
> @@ -349,9 +349,11 @@ int fdt_fixup_msmc_ram(void *blob, char *parent_path, char *node_name)
>  		size = fdt_read_number(sub_reg, 1);
>  		debug("%s: subnode = %d, addr = 0x%x. size = 0x%x\n", __func__,
>  		      subnode, addr, size);
> +
>  		if (addr + size > msmc_size ||
>  		    !strncmp(fdt_get_name(blob, subnode, &len), "sysfw", 5) ||
> -		    !strncmp(fdt_get_name(blob, subnode, &len), "l3cache", 7)) {
> +		    !strncmp(fdt_get_name(blob, subnode, &len), "l3cache", 7) ||
> +		    !strncmp(fdt_get_name(blob, subnode, &len), "tifs", 4)) {
I would probably move the tifs check above the l3cache check.

>  			fdt_del_node(blob, subnode);
>  			debug("%s: deleting subnode %d\n", __func__, subnode);
>  			if (!prev_node)
> -- 
> 2.34.1
> 

-- 
Regards,
Nishanth Menon
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