[PATCH 09/17] ARM: i.MX: boot: Move magic values into small functions

[Andrey Smirnov <andrew.smirnov@gmail.com>]

Move code to extract appropiate BOOT_CFG bits to decode booutsource on
i.MX53, 6, and 7 into small functions for clarity and to allow sharing
the code between i.MX53 and i.MX6.

Signed-off-by: Andrey Smirnov <andrew.smirnov@gmail.com>
---
 arch/arm/mach-imx/boot.c | 17 +++++++++++++----
 1 file changed, 13 insertions(+), 4 deletions(-)

diff --git a/arch/arm/mach-imx/boot.c b/arch/arm/mach-imx/boot.c
index cc54ea15a..66e1a9254 100644
--- a/arch/arm/mach-imx/boot.c
+++ b/arch/arm/mach-imx/boot.c
@@ -180,6 +180,11 @@ static unsigned int imx53_get_bmod(uint32_t r)
 	return sbmr(r, 25, 24);
 }
 
+static int imx53_bootsource_internal(uint32_t r)
+{
+	return sbmr(r, 7, 4);	/* BOOT_CFG1[7:4] */
+}
+
 void imx53_get_boot_source(enum bootsource *src, int *instance)
 {
 	void __iomem *src_base = IOMEM(MX53_SRC_BASE_ADDR);
@@ -191,7 +196,7 @@ void imx53_get_boot_source(enum bootsource *src, int *instance)
 		return;
 	}
 
-	switch ((cfg1 & 0xff) >> 4) {
+	switch (imx53_bootsource_internal(cfg1)) {
 	case 2:
 		*src = BOOTSOURCE_HD;
 		break;
@@ -266,8 +271,7 @@ void imx6_get_boot_source(enum bootsource *src, int *instance)
 		return;
 	}
 
-	/* BOOT_CFG1[7:4] */
-	switch ((sbmr1 >> 4) & 0xf) {
+	switch (imx53_bootsource_internal(sbmr1)) {
 	case 2:
 		*src = BOOTSOURCE_HD;
 		break;
@@ -307,6 +311,11 @@ void imx6_get_boot_source(enum bootsource *src, int *instance)
 #define IMX_BOOT_SW_INFO_POINTER_ADDR	0x000001E8
 #define IMX_BOOT_SW_INFO_BDT_SD		0x1
 
+static unsigned int imx7_bootsource_internal(uint32_t r)
+{
+	return sbmr(r, 15, 12);	/* BOOT_CFG[15:12] */
+}
+
 struct imx_boot_sw_info {
 	uint8_t  reserved_1;
 	uint8_t  boot_device_instance;
@@ -358,7 +367,7 @@ void imx7_get_boot_source(enum bootsource *src, int *instance)
 		return;
 	}
 
-	switch ((sbmr1 >> 12) & 0xf) {
+	switch (imx7_bootsource_internal(sbmr1)) {
 	case 1:
 	case 2:
 		*src = BOOTSOURCE_MMC;
-- 
2.14.3


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