arm: at91/spl: atmel_sfr: move saic redirect to separate file

To make saic redirect code sharing with other SoCs, move the
saic redirect code from SAMA5D4 particular file,
mach-at91/armv7/sama5d4_devices.c to a separate file,
mach-at91/atmel_sfr.c

Move ATMEL_SFR_AICREDIR_KEY definition to sama5d4.h, because each
SoC has its own value.

Signed-off-by: Wenyou Yang <wenyou.yang@atmel.com>
Reviewed-by: Andreas Bießmann <andreas.devel@googlemail.com>

arch/arm/mach-at91/Makefile

@@ -10,7 +10,7 @@ obj-$(CONFIG_AT91SAM9M10G45) += mpddrc.o spl_at91.o
 obj-$(CONFIG_AT91SAM9N12) += mpddrc.o spl_at91.o
 obj-$(CONFIG_AT91SAM9X5) += mpddrc.o spl_at91.o
 obj-$(CONFIG_SAMA5D3) += mpddrc.o spl_atmel.o
-obj-$(CONFIG_SAMA5D4) += mpddrc.o spl_atmel.o matrix.o
+obj-$(CONFIG_SAMA5D4) += mpddrc.o spl_atmel.o matrix.o atmel_sfr.o
 obj-y += spl.o
 endif
 

arch/arm/mach-at91/armv7/sama5d4_devices.c

@@ -45,16 +45,3 @@ void at91_udp_hw_init(void)
 	at91_periph_clk_enable(ATMEL_ID_UDPHS);
 }
 #endif
-
-#ifdef CONFIG_SPL_BUILD
-void redirect_int_from_saic_to_aic(void)
-{
-	struct atmel_sfr *sfr = (struct atmel_sfr *)ATMEL_BASE_SFR;
-	u32 key32;
-
-	if (!(readl(&sfr->aicredir) & ATMEL_SFR_AICREDIR_NSAIC)) {
-		key32 = readl(&sfr->sn1) ^ ATMEL_SFR_AICREDIR_KEY;
-		writel((key32 | ATMEL_SFR_AICREDIR_NSAIC), &sfr->aicredir);
-	}
-}
-#endif

arch/arm/mach-at91/atmel_sfr.c

@@ -0,0 +1,21 @@
+/*
+ * Copyright (C) 2015 Atmel Corporation
+ *		      Wenyou Yang <wenyou.yang@atmel.com>
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#include <common.h>
+#include <asm/io.h>
+#include <asm/arch/sama5_sfr.h>
+
+void redirect_int_from_saic_to_aic(void)
+{
+	struct atmel_sfr *sfr = (struct atmel_sfr *)ATMEL_BASE_SFR;
+	u32 key32;
+
+	if (!(readl(&sfr->aicredir) & ATMEL_SFR_AICREDIR_NSAIC)) {
+		key32 = readl(&sfr->sn1) ^ ATMEL_SFR_AICREDIR_KEY;
+		writel((key32 | ATMEL_SFR_AICREDIR_NSAIC), &sfr->aicredir);
+	}
+}

arch/arm/mach-at91/include/mach/sama5_sfr.h

@@ -32,7 +32,6 @@ struct atmel_sfr {
 #define ATMEL_SFR_DDRCFG_FDQSIEN	0x00020000
 
 /* Bit field in AICREDIR */
-#define ATMEL_SFR_AICREDIR_KEY		0x5F67B102
 #define ATMEL_SFR_AICREDIR_NSAIC	0x00000001
 
 #endif

arch/arm/mach-at91/include/mach/sama5d4.h

@@ -204,6 +204,9 @@
 #define H32MX_SLAVE_USB			5	/* USB Device & Host */
 #define H32MX_SLAVE_SMD			6	/* Soft Modem (SMD) */
 
+/* AICREDIR Unlock Key */
+#define ATMEL_SFR_AICREDIR_KEY		0x5F67B102
+
 /* sama5d4 series chip id definitions */
 #define ARCH_ID_SAMA5D4		0x8a5c07c0
 #define ARCH_EXID_SAMA5D41	0x00000001