The algorithm to detect serial mode can be shared between i.M6 and
i.MX7 as wall as simplified a bit by replacing swich goto/break/return
termination logic with more trivial if statements.
This commit also sets the stage for additional improvements in the
commits that follow.
Signed-off-by: Andrey Smirnov <andrew.smirnov@xxxxxxxxx>
---
arch/arm/mach-imx/boot.c | 50 +++++++++++++++++++++++-------------------------
1 file changed, 24 insertions(+), 26 deletions(-)
diff --git a/arch/arm/mach-imx/boot.c b/arch/arm/mach-imx/boot.c
index 56f9fb5d4..7eb7a16f3 100644
--- a/arch/arm/mach-imx/boot.c
+++ b/arch/arm/mach-imx/boot.c
@@ -229,6 +229,18 @@ void imx53_get_boot_source(enum bootsource *src, int *instance)
#define IMX6_SRC_SBMR1 0x04
#define IMX6_SRC_SBMR2 0x1c
+#define IMX6_BMOD_SERIAL 0b01
+#define IMX6_BMOD_RESERVED 0b11
+
+static bool imx6_bootsource_reserved(uint32_t sbmr2)
+{
+ return imx53_get_bmod(sbmr2) == IMX6_BMOD_RESERVED;
+}
+
+static bool imx6_bootsource_serial(uint32_t sbmr2)
+{
+ return imx53_get_bmod(sbmr2) == IMX6_BMOD_SERIAL;
+}
void imx6_get_boot_source(enum bootsource *src, int *instance)
{
@@ -237,20 +249,13 @@ void imx6_get_boot_source(enum bootsource *src, int *instance)
uint32_t sbmr2 = readl(src_base + IMX6_SRC_SBMR2);
uint32_t boot_cfg_4_2_0;
- switch (imx53_get_bmod(sbmr2)) {
- case 0: /* Fuses, fall through */
- case 2: /* internal boot */
- goto internal_boot;
- case 1: /* Serial Downloader */
- *src = BOOTSOURCE_SERIAL;
- break;
- case 3: /* reserved */
- break;
- };
-
- return;
+ if (imx6_bootsource_reserved(sbmr2))
+ return;
-internal_boot:
+ if (imx6_bootsource_serial(sbmr2)) {
+ *src = BOOTSOURCE_SERIAL;
+ return;
+ }
/* BOOT_CFG1[7:4] */
switch ((sbmr1 >> 4) & 0xf) {
@@ -298,20 +303,13 @@ void imx7_get_boot_source(enum bootsource *src, int *instance)
uint32_t sbmr1 = readl(src_base + IMX7_SRC_SBMR1);
uint32_t sbmr2 = readl(src_base + IMX7_SRC_SBMR2);
- switch (imx53_get_bmod(sbmr2)) {
- case 0: /* Fuses, fall through */
- case 2: /* internal boot */
- goto internal_boot;
- case 1: /* Serial Downloader */
- *src = BOOTSOURCE_SERIAL;
- break;
- case 3: /* reserved */
- break;
- };
-
- return;
+ if (imx6_bootsource_reserved(sbmr2))
+ return;
-internal_boot:
+ if (imx6_bootsource_serial(sbmr2)) {
+ *src = BOOTSOURCE_SERIAL;
+ return;
+ }
switch ((sbmr1 >> 12) & 0xf) {
case 1:
--
2.14.3
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