drivers: ddr: imx8mp: Add inline ECC feature support
the DRAM Controller in i.MX8MP will support a feature called "Inline ECC".
This is supported for all 3 supported DRAM technologies (LPDDR4, DDR4 and
DDR3L). When this feature is enabled by software, the DRAM Controller
reserves 12.5% of DRAM capacity for ECC information, and presents only
the non-ECC portion (lower 87.5% of the installed capacity of DRAM) to
the rest of the SoC.
The DRAM memory can be divided into 8 regions so that if a use case only
requires ECC protection on a subset of memory, then only that subset of
memory need support inline ECC. If this occurs, then there is no
performance penalty accessing the non-ECC-protected memory (no need to
access ECC for this portion of the memory map). This is all configured
with the DRAM Controller.
Signed-off-by: Sherry Sun <sherry.sun@nxp.com>
Signed-off-by: Peng Fan <peng.fan@nxp.com>
diff --git a/drivers/ddr/imx/imx8m/Kconfig b/drivers/ddr/imx/imx8m/Kconfig
index 5bf61eb..a5f5524 100644
--- a/drivers/ddr/imx/imx8m/Kconfig
+++ b/drivers/ddr/imx/imx8m/Kconfig
@@ -29,4 +29,11 @@
info into memory for low power use. OCRAM_S is used for this
purpose on i.MX8MM.
default 0x180000
+
+config IMX8M_DRAM_INLINE_ECC
+ bool "imx8mp inline ECC"
+ depends on IMX8MP && IMX8M_LPDDR4
+ help
+ Select this config if you want to use inline ecc feature for
+ imx8mp-evk board.
endmenu