v2018.01 commit e23eb942ad103f ("ARM: rmobile: Stop using
rcar-common/common.c on Gen3") removed
board/renesas/rcar-common/common.c from the build chain.
The reasoning is that calling arch_preboot_os() is no more needed.

However, we use this file as a place for R-Car common features /
functionalities, shared by both Renesas reference targets and any
custom R-Car boards. Without such file, we have to duplicate lots of
code into board-specific *.c files.

Restore rcar-common/common.c and zap the unneeded arch_preboot_os().
No functional change intended.

Signed-off-by: Eugeniu Rosca <ero...@de.adit-jv.com>
---
 board/renesas/rcar-common/common.c | 53 ------------------------------
 board/renesas/salvator-x/Makefile  |  2 +-
 board/renesas/ulcb/Makefile        |  2 +-
 3 files changed, 2 insertions(+), 55 deletions(-)

diff --git a/board/renesas/rcar-common/common.c 
b/board/renesas/rcar-common/common.c
index 1129f4bf0c08..1ce6e2eac1bf 100644
--- a/board/renesas/rcar-common/common.c
+++ b/board/renesas/rcar-common/common.c
@@ -8,57 +8,4 @@
  */
 
 #include <common.h>
-#include <asm/io.h>
-#include <asm/arch/sys_proto.h>
 #include <asm/arch/rmobile.h>
-#include <asm/arch/rcar-mstp.h>
-
-#define TSTR0          0x04
-#define TSTR0_STR0     0x01
-
-static struct mstp_ctl mstptbl[] = {
-       { SMSTPCR0, MSTP0_BITS, CONFIG_SMSTP0_ENA,
-               RMSTPCR0, MSTP0_BITS, CONFIG_RMSTP0_ENA },
-       { SMSTPCR1, MSTP1_BITS, CONFIG_SMSTP1_ENA,
-               RMSTPCR1, MSTP1_BITS, CONFIG_RMSTP1_ENA },
-       { SMSTPCR2, MSTP2_BITS, CONFIG_SMSTP2_ENA,
-               RMSTPCR2, MSTP2_BITS, CONFIG_RMSTP2_ENA },
-       { SMSTPCR3, MSTP3_BITS, CONFIG_SMSTP3_ENA,
-               RMSTPCR3, MSTP3_BITS, CONFIG_RMSTP3_ENA },
-       { SMSTPCR4, MSTP4_BITS, CONFIG_SMSTP4_ENA,
-               RMSTPCR4, MSTP4_BITS, CONFIG_RMSTP4_ENA },
-       { SMSTPCR5, MSTP5_BITS, CONFIG_SMSTP5_ENA,
-               RMSTPCR5, MSTP5_BITS, CONFIG_RMSTP5_ENA },
-#ifdef CONFIG_RCAR_GEN3
-       { SMSTPCR6, MSTP6_BITS, CONFIG_SMSTP6_ENA,
-               RMSTPCR6, MSTP6_BITS, CONFIG_RMSTP6_ENA },
-#endif
-       { SMSTPCR7, MSTP7_BITS, CONFIG_SMSTP7_ENA,
-               RMSTPCR7, MSTP7_BITS, CONFIG_RMSTP7_ENA },
-       { SMSTPCR8, MSTP8_BITS, CONFIG_SMSTP8_ENA,
-               RMSTPCR8, MSTP8_BITS, CONFIG_RMSTP8_ENA },
-       { SMSTPCR9, MSTP9_BITS, CONFIG_SMSTP9_ENA,
-               RMSTPCR9, MSTP9_BITS, CONFIG_RMSTP9_ENA },
-       { SMSTPCR10, MSTP10_BITS, CONFIG_SMSTP10_ENA,
-                RMSTPCR10, MSTP10_BITS, CONFIG_RMSTP10_ENA },
-       { SMSTPCR11, MSTP11_BITS, CONFIG_SMSTP1_ENA,
-                RMSTPCR11, MSTP11_BITS, CONFIG_RMSTP11_ENA },
-};
-
-void arch_preboot_os(void)
-{
-       int i;
-
-       /* stop TMU0 */
-       mstp_clrbits_le32(TMU_BASE + TSTR0, TMU_BASE + TSTR0, TSTR0_STR0);
-
-       /* Stop module clock */
-       for (i = 0; i < ARRAY_SIZE(mstptbl); i++) {
-               mstp_setclrbits_le32((uintptr_t)mstptbl[i].s_addr,
-                                    mstptbl[i].s_dis,
-                                    mstptbl[i].s_ena);
-               mstp_setclrbits_le32((uintptr_t)mstptbl[i].r_addr,
-                                    mstptbl[i].r_dis,
-                                    mstptbl[i].r_ena);
-       }
-}
diff --git a/board/renesas/salvator-x/Makefile 
b/board/renesas/salvator-x/Makefile
index 5b4dea91c141..61b0d063e592 100644
--- a/board/renesas/salvator-x/Makefile
+++ b/board/renesas/salvator-x/Makefile
@@ -6,4 +6,4 @@
 # SPDX-License-Identifier: GPL-2.0+
 #
 
-obj-y  := salvator-x.o
+obj-y  := salvator-x.o ../rcar-common/common.o
diff --git a/board/renesas/ulcb/Makefile b/board/renesas/ulcb/Makefile
index 406fdc8fa404..6fe0b480f77e 100644
--- a/board/renesas/ulcb/Makefile
+++ b/board/renesas/ulcb/Makefile
@@ -6,4 +6,4 @@
 # SPDX-License-Identifier: GPL-2.0+
 #
 
-obj-y  := ulcb.o cpld.o
+obj-y  := ulcb.o cpld.o ../rcar-common/common.o
-- 
2.21.0

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