[U-Boot] [PATCH 2/4] fsl_ifc: Add the workaround for erratum IFC-A002769 (enable on P1010)

[Kumar Gala]

From: Poonam Aggrwal <poonam.aggrwal at freescale.com>

Issue:
The NOR-FCM does not support access to unaligned addresses for 16 bit port size

Impact:
When 16 bit port size is used, accesses not aligned to 16 bit address boundary
will result in incorrect data

Workaround:
The workaround is to switch to GPCM mode for NOR Flash access.

Signed-off-by: Poonam Aggrwal <poonam.aggrwal at freescale.com>
Signed-off-by: Kumar Gala <galak at kernel.crashing.org>
---
 arch/powerpc/cpu/mpc85xx/cmd_errata.c     |    3 +++
 arch/powerpc/include/asm/config_mpc85xx.h |    2 ++
 arch/powerpc/include/asm/fsl_ifc.h        |    5 +++++
 3 files changed, 10 insertions(+), 0 deletions(-)

diff --git a/arch/powerpc/cpu/mpc85xx/cmd_errata.c b/arch/powerpc/cpu/mpc85xx/cmd_errata.c
index 7b9f773..446f759 100644
--- a/arch/powerpc/cpu/mpc85xx/cmd_errata.c
+++ b/arch/powerpc/cpu/mpc85xx/cmd_errata.c
@@ -87,6 +87,9 @@ static int do_errata(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
 	puts("Work-around for Erratum DDR111 enabled\n");
 	puts("Work-around for Erratum DDR134 enabled\n");
 #endif
+#ifdef CONFIG_SYS_FSL_ERRATUM_IFC_A002769
+	puts("Work-around for Erratum IFC-A002769 enabled\n");
+#endif
 	return 0;
 }
 
diff --git a/arch/powerpc/include/asm/config_mpc85xx.h b/arch/powerpc/include/asm/config_mpc85xx.h
index aa0f312..ccd8246 100644
--- a/arch/powerpc/include/asm/config_mpc85xx.h
+++ b/arch/powerpc/include/asm/config_mpc85xx.h
@@ -112,6 +112,7 @@
 #define CONFIG_SYS_CCSRBAR_DEFAULT	0xff700000
 #define CONFIG_SYS_FSL_PCIE_COMPAT	"fsl,qoriq-pcie-v2.2"
 #define CONFIG_SYS_FSL_USB_INTERNAL_UTMI_PHY
+#define CONFIG_SYS_FSL_ERRATUM_IFC_A002769
 
 /* P1011 is single core version of P1020 */
 #elif defined(CONFIG_P1011)
@@ -160,6 +161,7 @@
 #define CONFIG_NUM_DDR_CONTROLLERS	1
 #define CONFIG_SYS_CCSRBAR_DEFAULT	0xff700000
 #define CONFIG_SYS_FSL_USB_INTERNAL_UTMI_PHY
+#define CONFIG_SYS_FSL_ERRATUM_IFC_A002769
 
 /* P1015 is single core version of P1024 */
 #elif defined(CONFIG_P1015)
diff --git a/arch/powerpc/include/asm/fsl_ifc.h b/arch/powerpc/include/asm/fsl_ifc.h
index fb12363..7d95eb4 100644
--- a/arch/powerpc/include/asm/fsl_ifc.h
+++ b/arch/powerpc/include/asm/fsl_ifc.h
@@ -951,5 +951,10 @@ struct fsl_ifc {
 	struct fsl_ifc_gpcm ifc_gpcm;
 };
 
+#ifdef CONFIG_SYS_FSL_ERRATUM_IFC_A002769
+#undef CSPR_MSEL_NOR
+#define CSPR_MSEL_NOR	CSPR_MSEL_GPCM
+#endif
+
 #endif /* __ASSEMBLY__ */
 #endif /* __ASM_PPC_FSL_IFC_H */
-- 
1.7.3.4