[PATCH] ARM: at91: constify struct at91_ddramc_register parameters

[Ahmad Fatoum]

The SDRAM config passed as struct at91_ddramc_register is read-only,
so make it const everywhere to document and enforce this.

Signed-off-by: Ahmad Fatoum <a.fatoum at pengutronix.de>
---
 arch/arm/mach-at91/ddramc_ll.c                       | 6 +++---
 arch/arm/mach-at91/include/mach/ddramc.h             | 6 +++---
 arch/arm/mach-at91/include/mach/sama5d2-sip-ddramc.h | 2 +-
 arch/arm/mach-at91/include/mach/sama5d2_ll.h         | 2 +-
 arch/arm/mach-at91/sama5d2_ll.c                      | 2 +-
 5 files changed, 9 insertions(+), 9 deletions(-)

diff --git a/arch/arm/mach-at91/ddramc_ll.c b/arch/arm/mach-at91/ddramc_ll.c
index 4768fdcd6281..77d03720cca4 100644
--- a/arch/arm/mach-at91/ddramc_ll.c
+++ b/arch/arm/mach-at91/ddramc_ll.c
@@ -12,7 +12,7 @@
 
 void at91_ddram_initialize(void __iomem *base_address,
 			   void __iomem *ram_address,
-			   struct at91_ddramc_register *ddramc_config)
+			   const struct at91_ddramc_register *ddramc_config)
 {
 	unsigned long ba_offset;
 	unsigned long cr = 0;
@@ -235,7 +235,7 @@ void at91_ddram_initialize(void __iomem *base_address,
 
 void at91_lpddr2_sdram_initialize(void __iomem *base_address,
 				  void __iomem *ram_address,
-				  struct at91_ddramc_register *ddramc_config)
+				  const struct at91_ddramc_register *ddramc_config)
 {
 	unsigned long reg;
 
@@ -386,7 +386,7 @@ void at91_lpddr2_sdram_initialize(void __iomem *base_address,
 
 void at91_lpddr1_sdram_initialize(void __iomem *base_address,
 				  void __iomem *ram_address,
-				  struct at91_ddramc_register *ddramc_config)
+				  const struct at91_ddramc_register *ddramc_config)
 {
 	unsigned long ba_offset;
 
diff --git a/arch/arm/mach-at91/include/mach/ddramc.h b/arch/arm/mach-at91/include/mach/ddramc.h
index b929bf5f58e8..5d6f3a70b788 100644
--- a/arch/arm/mach-at91/include/mach/ddramc.h
+++ b/arch/arm/mach-at91/include/mach/ddramc.h
@@ -21,16 +21,16 @@ struct at91_ddramc_register {
 
 void at91_ddram_initialize(void __iomem *base_address,
 			   void __iomem *ram_address,
-			   struct at91_ddramc_register *ddramc_config);
+			   const struct at91_ddramc_register *ddramc_config);
 
 void at91_lpddr2_sdram_initialize(void __iomem *base_address,
 				  void __iomem *ram_address,
-				  struct at91_ddramc_register *ddramc_config);
+				  const struct at91_ddramc_register *ddramc_config);
 
 
 void at91_lpddr1_sdram_initialize(void __iomem *base_address,
 				  void __iomem *ram_address,
-				  struct at91_ddramc_register *ddramc_config);
+				  const struct at91_ddramc_register *ddramc_config);
 
 void __noreturn sama5d2_barebox_entry(unsigned int r4, void *boarddata);
 
diff --git a/arch/arm/mach-at91/include/mach/sama5d2-sip-ddramc.h b/arch/arm/mach-at91/include/mach/sama5d2-sip-ddramc.h
index 35c92c43fce8..6a75ac71fc35 100644
--- a/arch/arm/mach-at91/include/mach/sama5d2-sip-ddramc.h
+++ b/arch/arm/mach-at91/include/mach/sama5d2-sip-ddramc.h
@@ -11,7 +11,7 @@
 
 static inline void sama5d2_d1g_ddrconf(void) /* DDR2 1Gbit SDRAM */
 {
-	struct at91_ddramc_register conf = {
+	const struct at91_ddramc_register conf = {
 		.mdr = AT91_DDRC2_DBW_16_BITS | AT91_DDRC2_MD_DDR2_SDRAM,
 
 		.cr = AT91_DDRC2_NC_DDR10_SDR9 | AT91_DDRC2_NR_13 |
diff --git a/arch/arm/mach-at91/include/mach/sama5d2_ll.h b/arch/arm/mach-at91/include/mach/sama5d2_ll.h
index 96f3bc545284..244b1a706594 100644
--- a/arch/arm/mach-at91/include/mach/sama5d2_ll.h
+++ b/arch/arm/mach-at91/include/mach/sama5d2_ll.h
@@ -25,7 +25,7 @@ static inline void sama5d2_udelay_init(unsigned int msc)
 }
 
 
-void sama5d2_ddr2_init(struct at91_ddramc_register *ddramc_reg_config);
+void sama5d2_ddr2_init(const struct at91_ddramc_register *ddramc_reg_config);
 
 static inline int sama5d2_pmc_enable_generic_clock(unsigned int periph_id,
 						   unsigned int clk_source,
diff --git a/arch/arm/mach-at91/sama5d2_ll.c b/arch/arm/mach-at91/sama5d2_ll.c
index c3b50617778a..3366a50e8fba 100644
--- a/arch/arm/mach-at91/sama5d2_ll.c
+++ b/arch/arm/mach-at91/sama5d2_ll.c
@@ -18,7 +18,7 @@
 #define sama5d2_pmc_write(off, val) writel(val, SAMA5D2_BASE_PMC + off)
 #define sama5d2_pmc_read(off) readl(SAMA5D2_BASE_PMC + off)
 
-void sama5d2_ddr2_init(struct at91_ddramc_register *ddramc_reg_config)
+void sama5d2_ddr2_init(const struct at91_ddramc_register *ddramc_reg_config)
 {
 	unsigned int reg;
 
-- 
2.29.2