armv7:ls1021a: Enable workaround for DDR erratum A-009942

Signed-off-by: Shengzhou Liu <Shengzhou.Liu@nxp.com>
Reviewed-by: York Sun <york.sun@nxp.com>

arch/arm/include/asm/arch-ls102xa/config.h

@@ -131,6 +131,7 @@
 #define CONFIG_USB_MAX_CONTROLLER_COUNT		1
 #define CONFIG_SYS_FSL_ERRATUM_A008378
 #define CONFIG_SYS_FSL_ERRATUM_A009663
+#define CONFIG_SYS_FSL_ERRATUM_A009942
 #define CONFIG_SYS_FSL_ERRATUM_A010315
 #define CONFIG_SYS_FSL_MAX_NUM_OF_SEC		1
 #else

board/freescale/ls1021atwr/ls1021atwr.c

@@ -142,7 +142,7 @@ int checkboard(void)
 void ddrmc_init(void)
 {
 	struct ccsr_ddr *ddr = (struct ccsr_ddr *)CONFIG_SYS_FSL_DDR_ADDR;
-	u32 temp_sdram_cfg;
+	u32 temp_sdram_cfg, tmp;
 
 	out_be32(&ddr->sdram_cfg, DDR_SDRAM_CFG);
 
@@ -189,6 +189,11 @@ void ddrmc_init(void)
 	out_be32(&ddr->ddr_zq_cntl, DDR_DDR_ZQ_CNTL);
 
 	out_be32(&ddr->cs0_config_2, DDR_CS0_CONFIG_2);
+
+	/* DDR erratum A-009942 */
+	tmp = in_be32(&ddr->debug[28]);
+	out_be32(&ddr->debug[28], tmp | 0x0070006f);
+
 	udelay(1);
 
 #ifdef CONFIG_DEEP_SLEEP