From: Neha Malcom Francis Date: Tue, 12 Aug 2025 12:43:18 +0000 (+0530) Subject: ram: k3-ddrss: Add comment about ecc_reserved_space X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=1c70e33b0aca6d5d84145636400e496feb19c8b9;p=thirdparty%2Fu-boot.git ram: k3-ddrss: Add comment about ecc_reserved_space 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 Signed-off-by: Neha Malcom Francis --- diff --git a/drivers/ram/k3-ddrss/k3-ddrss.c b/drivers/ram/k3-ddrss/k3-ddrss.c index 2fdbd4609a8..d35adc840f4 100644 --- a/drivers/ram/k3-ddrss/k3-ddrss.c +++ b/drivers/ram/k3-ddrss/k3-ddrss.c @@ -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);