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ram: k3-ddrss: Add comment about ecc_reserved_space

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The reserved space needed for storing the parity remains the same no
matter the size of the region that is being protected. Add this as a
comment for better code understanding.

Reviewed-by: Udit Kumar <u-kumar1@ti.com>
Signed-off-by: Neha Malcom Francis <n-francis@ti.com>
This commit is contained in:
Neha Malcom Francis
2025-08-12 18:13:18 +05:30
committed by Tom Rini
parent e511c651f6
commit 1c70e33b0a
1 changed files with 6 additions and 0 deletions
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6
drivers/ram/k3-ddrss/k3-ddrss.c
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@@ -737,6 +737,12 @@ static void k3_ddrss_lpddr4_ecc_calc_reserved_mem(struct k3_ddrss_desc *ddrss)
{
fdtdec_setup_mem_size_base_lowest();
/*
* For every 512-byte data block, 64 bytes are used to store inline ECC
* information into a reserved region. It remains 1/9th of the total DDR
* size irrespective of the size of the region under protection.
*/
ddrss->ecc_reserved_space = ddrss->ddr_ram_size;
do_div(ddrss->ecc_reserved_space, 9);