powerpc/85xx: Add the workaround for erratum CPC-A003 (enable on P4080)

CoreNet Platform Cache single-bit data error scrubbing will cause data
corruption.  Disable the feature to workaround the issue.

Signed-off-by: Kumar Gala <galak@kernel.crashing.org>

arch/powerpc/cpu/mpc85xx/cmd_errata.c

@@ -62,6 +62,9 @@ static int do_errata(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
 #ifdef CONFIG_SYS_FSL_ERRATUM_CPC_A002
 	puts("Work-around for Erratum CPC-A002 enabled\n");
 #endif
+#ifdef CONFIG_SYS_FSL_ERRATUM_CPC_A003
+	puts("Work-around for Erratum CPC-A003 enabled\n");
+#endif
 
 	return 0;
 }

arch/powerpc/cpu/mpc85xx/cpu_init.c

@@ -145,6 +145,9 @@ static void enable_cpc(void)
 #ifdef CONFIG_SYS_FSL_ERRATUM_CPC_A002
 		setbits_be32(&cpc->cpchdbcr0, CPC_HDBCR0_TAG_ECC_SCRUB_DIS);
 #endif
+#ifdef CONFIG_SYS_FSL_ERRATUM_CPC_A003
+		setbits_be32(&cpc->cpchdbcr0, CPC_HDBCR0_DATA_ECC_SCRUB_DIS);
+#endif
 
 		out_be32(&cpc->cpccsr0, CPC_CSR0_CE | CPC_CSR0_PE);
 		/* Read back to sync write */

arch/powerpc/include/asm/immap_85xx.h

@@ -1620,6 +1620,7 @@ typedef struct cpc_corenet {
 #define	CPC_ERRDIS_TMHITDIS  	0x00000080	/* multi-way hit disable */
 #define CPC_HDBCR0_CDQ_SPEC_DIS	0x08000000
 #define CPC_HDBCR0_TAG_ECC_SCRUB_DIS	0x01000000
+#define CPC_HDBCR0_DATA_ECC_SCRUB_DIS	0x00400000
 #endif /* CONFIG_SYS_FSL_CPC */
 
 /* Global Utilities Block */

include/configs/P4080DS.h

@@ -41,6 +41,7 @@
 
 #define CONFIG_SYS_P4080_ERRATUM_CPU22
 #define CONFIG_SYS_FSL_ERRATUM_CPC_A002
+#define CONFIG_SYS_FSL_ERRATUM_CPC_A003
 #define CONFIG_SYS_P4080_ERRATUM_SERDES8
 
 #include "corenet_ds.h"