[PATCHv2 2/2] ddr: socfpga: Enable ARM64 Non-Secure SDRAM ECC Access

[thor.thayer at linux.intel.com]

From: Thor Thayer <thor.thayer at linux.intel.com>

The ECC registers in the SDRAM HMC Adapter should always
be accessible (both when ECC is enabled and disabled).
Currently, the registers are accessible only when ECC is enabled.

The ECC Enabled bit is used to determine the status of
ECC by later OSes so always allow access.

Signed-off-by: Thor Thayer <thor.thayer at linux.intel.com>
---
v2 New Patch. Rebase patch on top of pending patchset
   [PATCH v8 00/19] Add Intel Agilex SoC support
   https://patchwork.ozlabs.org/cover/1201373/
---
 drivers/ddr/altera/sdram_agilex.c | 6 +++---
 drivers/ddr/altera/sdram_s10.c    | 6 +++---
 2 files changed, 6 insertions(+), 6 deletions(-)

diff --git a/drivers/ddr/altera/sdram_agilex.c b/drivers/ddr/altera/sdram_agilex.c
index cc7679a6e4c1..0cbcd1405607 100644
--- a/drivers/ddr/altera/sdram_agilex.c
+++ b/drivers/ddr/altera/sdram_agilex.c
@@ -143,9 +143,6 @@ int sdram_mmr_init_full(struct udevice *dev)
 		setbits_le32(plat->hmc + ERRINTEN,
 			     DDR_HMC_ERRINTEN_DERRINTEN_EN_SET_MSK);
 
-		/* Enable non-secure writes to HMC Adapter for SDRAM ECC */
-		writel(FW_HMC_ADAPTOR_MPU_MASK, FW_HMC_ADAPTOR_REG_ADDR);
-
 		if (!cpu_has_been_warmreset())
 			sdram_init_ecc_bits(&bd);
 	} else {
@@ -158,6 +155,9 @@ int sdram_mmr_init_full(struct udevice *dev)
 			      DDR_HMC_ECCCTL2_AWB_EN_SET_MSK));
 	}
 
+	/* Enable non-secure reads/writes to HMC Adapter for SDRAM ECC */
+	writel(FW_HMC_ADAPTOR_MPU_MASK, FW_HMC_ADAPTOR_REG_ADDR);
+
 	sdram_size_check(&bd);
 
 	priv->info.base = bd.bi_dram[0].start;
diff --git a/drivers/ddr/altera/sdram_s10.c b/drivers/ddr/altera/sdram_s10.c
index a7bf82e4e5ce..2b8889260f9f 100644
--- a/drivers/ddr/altera/sdram_s10.c
+++ b/drivers/ddr/altera/sdram_s10.c
@@ -306,9 +306,6 @@ int sdram_mmr_init_full(struct udevice *dev)
 			      DDR_HMC_ECCCTL2_AWB_EN_SET_MSK));
 		hmc_ecc_writel(plat, DDR_HMC_ERRINTEN_INTMASK, ERRINTENS);
 
-		/* Enable non-secure writes to HMC Adapter for SDRAM ECC */
-		writel(FW_HMC_ADAPTOR_MPU_MASK, FW_HMC_ADAPTOR_REG_ADDR);
-
 		/* Initialize memory content if not from warm reset */
 		if (!cpu_has_been_warmreset())
 			sdram_init_ecc_bits(&bd);
@@ -322,6 +319,9 @@ int sdram_mmr_init_full(struct udevice *dev)
 			      DDR_HMC_ECCCTL2_AWB_EN_SET_MSK));
 	}
 
+	/* Enable non-secure reads/writes to HMC Adapter for SDRAM ECC */
+	writel(FW_HMC_ADAPTOR_MPU_MASK, FW_HMC_ADAPTOR_REG_ADDR);
+
 	sdram_size_check(&bd);
 
 	priv->info.base = bd.bi_dram[0].start;
-- 
2.7.4