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From:   Dave Gerlach <d-gerlach@ti.com>
To:     <linux-kernel@vger.kernel.org>, Tony Lindgren <tony@atomide.com>,
        Russell King - ARM Linux <linux@armlinux.org.uk>,
        Santosh Shilimkar <santosh.shilimkar@oracle.com>
CC:     <linux-arm-kernel@lists.infradead.org>,
        <linux-omap@vger.kernel.org>, <linux-kbuild@vger.kernel.org>,
        Anders Roxell <anders.roxell@linaro.org>,
        Dave Gerlach <d-gerlach@ti.com>,
        Masahiro Yamada <yamada.masahiro@socionext.com>,
        Michal Marek <michal.lkml@markovi.net>
Subject: [PATCH v2] ARM: omap2: Fix build when using split object directories
Date:   Thu, 12 Apr 2018 21:58:56 -0500
Message-ID: <20180413025856.19969-1-d-gerlach@ti.com>
MIME-Version: 1.0
Content-Type: text/plain
Sender: linux-kernel-owner@vger.kernel.org
Precedence: bulk

The sleep33xx and sleep43xx files should not depend on a header file
generated in drivers/memory. Remove this dependency and instead allow
both drivers/memory and arch/arm/mach-omap2 to generate all macros
needed in headers local to their own paths.

This fixes an issue where the build fail will when using O= to set a
split object directory and arch/arm/mach-omap2 is built before
drivers/memory with the following error:

.../drivers/memory/emif-asm-offsets.c:1:0: fatal error: can't open drivers/memory/emif-asm-offsets.s for writing: No such file or directory
compilation terminated.

Fixes: 41d9d44d7258 ("ARM: OMAP2+: pm33xx-core: Add platform code needed for PM")
Acked-by: Tony Lindgren <tony@atomide.com>
Reviewed-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Tested-by: Anders Roxell <anders.roxell@linaro.org>
Signed-off-by: Dave Gerlach <d-gerlach@ti.com>
---
v1 -> v2:
 * Removed drivers/memory/Makefile.asm-offsets and consolidated into
   drivers/memory/Makefile.

 arch/arm/mach-omap2/Makefile         |  6 +--
 arch/arm/mach-omap2/pm-asm-offsets.c |  3 ++
 arch/arm/mach-omap2/sleep33xx.S      |  1 -
 arch/arm/mach-omap2/sleep43xx.S      |  1 -
 drivers/memory/Makefile              |  8 +++-
 drivers/memory/Makefile.asm-offsets  |  5 ---
 drivers/memory/emif-asm-offsets.c    | 72 +---------------------------------
 include/linux/ti-emif-sram.h         | 75 ++++++++++++++++++++++++++++++++++++
 8 files changed, 86 insertions(+), 85 deletions(-)
 delete mode 100644 drivers/memory/Makefile.asm-offsets

diff --git a/arch/arm/mach-omap2/Makefile b/arch/arm/mach-omap2/Makefile
index 4603c30fef73..0d9ce58bc464 100644
--- a/arch/arm/mach-omap2/Makefile
+++ b/arch/arm/mach-omap2/Makefile
@@ -243,8 +243,4 @@ arch/arm/mach-omap2/pm-asm-offsets.s: arch/arm/mach-omap2/pm-asm-offsets.c
 include/generated/ti-pm-asm-offsets.h: arch/arm/mach-omap2/pm-asm-offsets.s FORCE
 	$(call filechk,offsets,__TI_PM_ASM_OFFSETS_H__)
 
-# For rule to generate ti-emif-asm-offsets.h dependency
-include drivers/memory/Makefile.asm-offsets
-
-arch/arm/mach-omap2/sleep33xx.o: include/generated/ti-pm-asm-offsets.h include/generated/ti-emif-asm-offsets.h
-arch/arm/mach-omap2/sleep43xx.o: include/generated/ti-pm-asm-offsets.h include/generated/ti-emif-asm-offsets.h
+$(obj)/sleep33xx.o $(obj)/sleep43xx.o: include/generated/ti-pm-asm-offsets.h
diff --git a/arch/arm/mach-omap2/pm-asm-offsets.c b/arch/arm/mach-omap2/pm-asm-offsets.c
index 6d4392da7c11..b9846b19e5e2 100644
--- a/arch/arm/mach-omap2/pm-asm-offsets.c
+++ b/arch/arm/mach-omap2/pm-asm-offsets.c
@@ -7,9 +7,12 @@
 
 #include <linux/kbuild.h>
 #include <linux/platform_data/pm33xx.h>
+#include <linux/ti-emif-sram.h>
 
 int main(void)
 {
+	ti_emif_asm_offsets();
+
 	DEFINE(AMX3_PM_WFI_FLAGS_OFFSET,
 	       offsetof(struct am33xx_pm_sram_data, wfi_flags));
 	DEFINE(AMX3_PM_L2_AUX_CTRL_VAL_OFFSET,
diff --git a/arch/arm/mach-omap2/sleep33xx.S b/arch/arm/mach-omap2/sleep33xx.S
index 218d79930b04..322b3bb868b4 100644
--- a/arch/arm/mach-omap2/sleep33xx.S
+++ b/arch/arm/mach-omap2/sleep33xx.S
@@ -6,7 +6,6 @@
  *	Dave Gerlach, Vaibhav Bedia
  */
 
-#include <generated/ti-emif-asm-offsets.h>
 #include <generated/ti-pm-asm-offsets.h>
 #include <linux/linkage.h>
 #include <linux/ti-emif-sram.h>
diff --git a/arch/arm/mach-omap2/sleep43xx.S b/arch/arm/mach-omap2/sleep43xx.S
index b24be624e8b9..8903814a6677 100644
--- a/arch/arm/mach-omap2/sleep43xx.S
+++ b/arch/arm/mach-omap2/sleep43xx.S
@@ -6,7 +6,6 @@
  *	Dave Gerlach, Vaibhav Bedia
  */
 
-#include <generated/ti-emif-asm-offsets.h>
 #include <generated/ti-pm-asm-offsets.h>
 #include <linux/linkage.h>
 #include <linux/ti-emif-sram.h>
diff --git a/drivers/memory/Makefile b/drivers/memory/Makefile
index 66f55240830e..b3b95380346f 100644
--- a/drivers/memory/Makefile
+++ b/drivers/memory/Makefile
@@ -28,6 +28,10 @@ ti-emif-sram-objs		:= ti-emif-pm.o ti-emif-sram-pm.o
 
 AFLAGS_ti-emif-sram-pm.o	:=-Wa,-march=armv7-a
 
-include drivers/memory/Makefile.asm-offsets
+drivers/memory/emif-asm-offsets.s: drivers/memory/emif-asm-offsets.c
+	$(call if_changed_dep,cc_s_c)
 
-drivers/memory/ti-emif-sram-pm.o: include/generated/ti-emif-asm-offsets.h
+include/generated/ti-emif-asm-offsets.h: drivers/memory/emif-asm-offsets.s FORCE
+	$(call filechk,offsets,__TI_EMIF_ASM_OFFSETS_H__)
+
+$(obj)/ti-emif-sram-pm.o: include/generated/ti-emif-asm-offsets.h
diff --git a/drivers/memory/Makefile.asm-offsets b/drivers/memory/Makefile.asm-offsets
deleted file mode 100644
index 843ff60ccb5a..000000000000
--- a/drivers/memory/Makefile.asm-offsets
+++ /dev/null
@@ -1,5 +0,0 @@
-drivers/memory/emif-asm-offsets.s: drivers/memory/emif-asm-offsets.c
-	$(call if_changed_dep,cc_s_c)
-
-include/generated/ti-emif-asm-offsets.h: drivers/memory/emif-asm-offsets.s FORCE
-	$(call filechk,offsets,__TI_EMIF_ASM_OFFSETS_H__)
diff --git a/drivers/memory/emif-asm-offsets.c b/drivers/memory/emif-asm-offsets.c
index 71a89d5d3efd..db8043019ec6 100644
--- a/drivers/memory/emif-asm-offsets.c
+++ b/drivers/memory/emif-asm-offsets.c
@@ -16,77 +16,7 @@
 
 int main(void)
 {
-	DEFINE(EMIF_SDCFG_VAL_OFFSET,
-	       offsetof(struct emif_regs_amx3, emif_sdcfg_val));
-	DEFINE(EMIF_TIMING1_VAL_OFFSET,
-	       offsetof(struct emif_regs_amx3, emif_timing1_val));
-	DEFINE(EMIF_TIMING2_VAL_OFFSET,
-	       offsetof(struct emif_regs_amx3, emif_timing2_val));
-	DEFINE(EMIF_TIMING3_VAL_OFFSET,
-	       offsetof(struct emif_regs_amx3, emif_timing3_val));
-	DEFINE(EMIF_REF_CTRL_VAL_OFFSET,
-	       offsetof(struct emif_regs_amx3, emif_ref_ctrl_val));
-	DEFINE(EMIF_ZQCFG_VAL_OFFSET,
-	       offsetof(struct emif_regs_amx3, emif_zqcfg_val));
-	DEFINE(EMIF_PMCR_VAL_OFFSET,
-	       offsetof(struct emif_regs_amx3, emif_pmcr_val));
-	DEFINE(EMIF_PMCR_SHDW_VAL_OFFSET,
-	       offsetof(struct emif_regs_amx3, emif_pmcr_shdw_val));
-	DEFINE(EMIF_RD_WR_LEVEL_RAMP_CTRL_OFFSET,
-	       offsetof(struct emif_regs_amx3, emif_rd_wr_level_ramp_ctrl));
-	DEFINE(EMIF_RD_WR_EXEC_THRESH_OFFSET,
-	       offsetof(struct emif_regs_amx3, emif_rd_wr_exec_thresh));
-	DEFINE(EMIF_COS_CONFIG_OFFSET,
-	       offsetof(struct emif_regs_amx3, emif_cos_config));
-	DEFINE(EMIF_PRIORITY_TO_COS_MAPPING_OFFSET,
-	       offsetof(struct emif_regs_amx3, emif_priority_to_cos_mapping));
-	DEFINE(EMIF_CONNECT_ID_SERV_1_MAP_OFFSET,
-	       offsetof(struct emif_regs_amx3, emif_connect_id_serv_1_map));
-	DEFINE(EMIF_CONNECT_ID_SERV_2_MAP_OFFSET,
-	       offsetof(struct emif_regs_amx3, emif_connect_id_serv_2_map));
-	DEFINE(EMIF_OCP_CONFIG_VAL_OFFSET,
-	       offsetof(struct emif_regs_amx3, emif_ocp_config_val));
-	DEFINE(EMIF_LPDDR2_NVM_TIM_OFFSET,
-	       offsetof(struct emif_regs_amx3, emif_lpddr2_nvm_tim));
-	DEFINE(EMIF_LPDDR2_NVM_TIM_SHDW_OFFSET,
-	       offsetof(struct emif_regs_amx3, emif_lpddr2_nvm_tim_shdw));
-	DEFINE(EMIF_DLL_CALIB_CTRL_VAL_OFFSET,
-	       offsetof(struct emif_regs_amx3, emif_dll_calib_ctrl_val));
-	DEFINE(EMIF_DLL_CALIB_CTRL_VAL_SHDW_OFFSET,
-	       offsetof(struct emif_regs_amx3, emif_dll_calib_ctrl_val_shdw));
-	DEFINE(EMIF_DDR_PHY_CTLR_1_OFFSET,
-	       offsetof(struct emif_regs_amx3, emif_ddr_phy_ctlr_1));
-	DEFINE(EMIF_EXT_PHY_CTRL_VALS_OFFSET,
-	       offsetof(struct emif_regs_amx3, emif_ext_phy_ctrl_vals));
-	DEFINE(EMIF_REGS_AMX3_SIZE, sizeof(struct emif_regs_amx3));
-
-	BLANK();
-
-	DEFINE(EMIF_PM_BASE_ADDR_VIRT_OFFSET,
-	       offsetof(struct ti_emif_pm_data, ti_emif_base_addr_virt));
-	DEFINE(EMIF_PM_BASE_ADDR_PHYS_OFFSET,
-	       offsetof(struct ti_emif_pm_data, ti_emif_base_addr_phys));
-	DEFINE(EMIF_PM_CONFIG_OFFSET,
-	       offsetof(struct ti_emif_pm_data, ti_emif_sram_config));
-	DEFINE(EMIF_PM_REGS_VIRT_OFFSET,
-	       offsetof(struct ti_emif_pm_data, regs_virt));
-	DEFINE(EMIF_PM_REGS_PHYS_OFFSET,
-	       offsetof(struct ti_emif_pm_data, regs_phys));
-	DEFINE(EMIF_PM_DATA_SIZE, sizeof(struct ti_emif_pm_data));
-
-	BLANK();
-
-	DEFINE(EMIF_PM_SAVE_CONTEXT_OFFSET,
-	       offsetof(struct ti_emif_pm_functions, save_context));
-	DEFINE(EMIF_PM_RESTORE_CONTEXT_OFFSET,
-	       offsetof(struct ti_emif_pm_functions, restore_context));
-	DEFINE(EMIF_PM_ENTER_SR_OFFSET,
-	       offsetof(struct ti_emif_pm_functions, enter_sr));
-	DEFINE(EMIF_PM_EXIT_SR_OFFSET,
-	       offsetof(struct ti_emif_pm_functions, exit_sr));
-	DEFINE(EMIF_PM_ABORT_SR_OFFSET,
-	       offsetof(struct ti_emif_pm_functions, abort_sr));
-	DEFINE(EMIF_PM_FUNCTIONS_SIZE, sizeof(struct ti_emif_pm_functions));
+	ti_emif_asm_offsets();
 
 	return 0;
 }
diff --git a/include/linux/ti-emif-sram.h b/include/linux/ti-emif-sram.h
index 45bc6b376492..53604b087f2c 100644
--- a/include/linux/ti-emif-sram.h
+++ b/include/linux/ti-emif-sram.h
@@ -60,6 +60,81 @@ struct ti_emif_pm_functions {
 	u32 abort_sr;
 } __packed __aligned(8);
 
+static inline void ti_emif_asm_offsets(void)
+{
+	DEFINE(EMIF_SDCFG_VAL_OFFSET,
+	       offsetof(struct emif_regs_amx3, emif_sdcfg_val));
+	DEFINE(EMIF_TIMING1_VAL_OFFSET,
+	       offsetof(struct emif_regs_amx3, emif_timing1_val));
+	DEFINE(EMIF_TIMING2_VAL_OFFSET,
+	       offsetof(struct emif_regs_amx3, emif_timing2_val));
+	DEFINE(EMIF_TIMING3_VAL_OFFSET,
+	       offsetof(struct emif_regs_amx3, emif_timing3_val));
+	DEFINE(EMIF_REF_CTRL_VAL_OFFSET,
+	       offsetof(struct emif_regs_amx3, emif_ref_ctrl_val));
+	DEFINE(EMIF_ZQCFG_VAL_OFFSET,
+	       offsetof(struct emif_regs_amx3, emif_zqcfg_val));
+	DEFINE(EMIF_PMCR_VAL_OFFSET,
+	       offsetof(struct emif_regs_amx3, emif_pmcr_val));
+	DEFINE(EMIF_PMCR_SHDW_VAL_OFFSET,
+	       offsetof(struct emif_regs_amx3, emif_pmcr_shdw_val));
+	DEFINE(EMIF_RD_WR_LEVEL_RAMP_CTRL_OFFSET,
+	       offsetof(struct emif_regs_amx3, emif_rd_wr_level_ramp_ctrl));
+	DEFINE(EMIF_RD_WR_EXEC_THRESH_OFFSET,
+	       offsetof(struct emif_regs_amx3, emif_rd_wr_exec_thresh));
+	DEFINE(EMIF_COS_CONFIG_OFFSET,
+	       offsetof(struct emif_regs_amx3, emif_cos_config));
+	DEFINE(EMIF_PRIORITY_TO_COS_MAPPING_OFFSET,
+	       offsetof(struct emif_regs_amx3, emif_priority_to_cos_mapping));
+	DEFINE(EMIF_CONNECT_ID_SERV_1_MAP_OFFSET,
+	       offsetof(struct emif_regs_amx3, emif_connect_id_serv_1_map));
+	DEFINE(EMIF_CONNECT_ID_SERV_2_MAP_OFFSET,
+	       offsetof(struct emif_regs_amx3, emif_connect_id_serv_2_map));
+	DEFINE(EMIF_OCP_CONFIG_VAL_OFFSET,
+	       offsetof(struct emif_regs_amx3, emif_ocp_config_val));
+	DEFINE(EMIF_LPDDR2_NVM_TIM_OFFSET,
+	       offsetof(struct emif_regs_amx3, emif_lpddr2_nvm_tim));
+	DEFINE(EMIF_LPDDR2_NVM_TIM_SHDW_OFFSET,
+	       offsetof(struct emif_regs_amx3, emif_lpddr2_nvm_tim_shdw));
+	DEFINE(EMIF_DLL_CALIB_CTRL_VAL_OFFSET,
+	       offsetof(struct emif_regs_amx3, emif_dll_calib_ctrl_val));
+	DEFINE(EMIF_DLL_CALIB_CTRL_VAL_SHDW_OFFSET,
+	       offsetof(struct emif_regs_amx3, emif_dll_calib_ctrl_val_shdw));
+	DEFINE(EMIF_DDR_PHY_CTLR_1_OFFSET,
+	       offsetof(struct emif_regs_amx3, emif_ddr_phy_ctlr_1));
+	DEFINE(EMIF_EXT_PHY_CTRL_VALS_OFFSET,
+	       offsetof(struct emif_regs_amx3, emif_ext_phy_ctrl_vals));
+	DEFINE(EMIF_REGS_AMX3_SIZE, sizeof(struct emif_regs_amx3));
+
+	BLANK();
+
+	DEFINE(EMIF_PM_BASE_ADDR_VIRT_OFFSET,
+	       offsetof(struct ti_emif_pm_data, ti_emif_base_addr_virt));
+	DEFINE(EMIF_PM_BASE_ADDR_PHYS_OFFSET,
+	       offsetof(struct ti_emif_pm_data, ti_emif_base_addr_phys));
+	DEFINE(EMIF_PM_CONFIG_OFFSET,
+	       offsetof(struct ti_emif_pm_data, ti_emif_sram_config));
+	DEFINE(EMIF_PM_REGS_VIRT_OFFSET,
+	       offsetof(struct ti_emif_pm_data, regs_virt));
+	DEFINE(EMIF_PM_REGS_PHYS_OFFSET,
+	       offsetof(struct ti_emif_pm_data, regs_phys));
+	DEFINE(EMIF_PM_DATA_SIZE, sizeof(struct ti_emif_pm_data));
+
+	BLANK();
+
+	DEFINE(EMIF_PM_SAVE_CONTEXT_OFFSET,
+	       offsetof(struct ti_emif_pm_functions, save_context));
+	DEFINE(EMIF_PM_RESTORE_CONTEXT_OFFSET,
+	       offsetof(struct ti_emif_pm_functions, restore_context));
+	DEFINE(EMIF_PM_ENTER_SR_OFFSET,
+	       offsetof(struct ti_emif_pm_functions, enter_sr));
+	DEFINE(EMIF_PM_EXIT_SR_OFFSET,
+	       offsetof(struct ti_emif_pm_functions, exit_sr));
+	DEFINE(EMIF_PM_ABORT_SR_OFFSET,
+	       offsetof(struct ti_emif_pm_functions, abort_sr));
+	DEFINE(EMIF_PM_FUNCTIONS_SIZE, sizeof(struct ti_emif_pm_functions));
+}
+
 struct gen_pool;
 
 int ti_emif_copy_pm_function_table(struct gen_pool *sram_pool, void *dst);
-- 
2.16.1