rockchip: Separate the reset cause from display cpuinfo

reset cause is a generic functionality based on the soc
cru registers in rockchip. This can be used for printing
the cause of reset in cpuinfo or some other place where
reset cause is needed. 

Other than cpuinfo, reset cause can also be using during
bootcount for checking the specific reset cause and glow
the led based on the reset cause.

So, let's separate the reset cause code from cpuinfo, and
add a check to build it for rk3399, rk3288 since these two
soc are supporting reset cause as of now.

Tested-by: Suniel Mahesh <sunil@amarulasolutions.com>
Signed-off-by: Jagan Teki <jagan@amarulasolutions.com>
Reviewed-by: Kever Yang <kever.yang@rock-chips.com>

diff --git a/arch/arm/include/asm/arch-rockchip/cru.h b/arch/arm/include/asm/arch-rockchip/cru.h
index d2057cb..13ea4ab 100644 (file)
--- a/arch/arm/include/asm/arch-rockchip/cru.h
+++ b/arch/arm/include/asm/arch-rockchip/cru.h
@@ -30,4 +30,6 @@ enum {
 
 #define MHz            1000000
 
+char *get_reset_cause(void);
+
 #endif /* _ROCKCHIP_CLOCK_H */

diff --git a/arch/arm/mach-rockchip/Makefile b/arch/arm/mach-rockchip/Makefile
index 5b38526..121f23a 100644 (file)
--- a/arch/arm/mach-rockchip/Makefile
+++ b/arch/arm/mach-rockchip/Makefile
@@ -22,11 +22,14 @@ ifeq ($(CONFIG_SPL_BUILD)$(CONFIG_TPL_BUILD),)
 # we can have the preprocessor correctly recognise both 0x0 and 0
 # meaning "turn it off".
 obj-y += boot_mode.o
-obj-$(CONFIG_DISPLAY_CPUINFO) += cpu-info.o
 obj-$(CONFIG_ROCKCHIP_COMMON_BOARD) += board.o
 obj-$(CONFIG_MISC_INIT_R) += misc.o
 endif
 
+ifeq ($(CONFIG_TPL_BUILD),)
+obj-$(CONFIG_DISPLAY_CPUINFO) += cpu-info.o
+endif
+
 obj-$(CONFIG_$(SPL_TPL_)RAM) += sdram.o
 
 obj-$(CONFIG_ROCKCHIP_PX30) += px30/

diff --git a/arch/arm/mach-rockchip/cpu-info.c b/arch/arm/mach-rockchip/cpu-info.c
index bb5a198..d0f0301 100644 (file)
--- a/arch/arm/mach-rockchip/cpu-info.c
+++ b/arch/arm/mach-rockchip/cpu-info.c
@@ -13,7 +13,7 @@
 #include <asm/arch-rockchip/hardware.h>
 #include <linux/err.h>
 
-static char *get_reset_cause(void)
+char *get_reset_cause(void)
 {
        struct rockchip_cru *cru = rockchip_get_cru();
        char *cause = NULL;
@@ -41,21 +41,25 @@ static char *get_reset_cause(void)
                cause = "unknown reset";
        }
 
-       /**
-        * reset_reason env is used by rk3288, due to special use case
-        * to figure it the boot behavior. so keep this as it is.
-        */
-       env_set("reset_reason", cause);
-
        return cause;
 }
 
+#if CONFIG_IS_ENABLED(DISPLAY_CPUINFO)
 int print_cpuinfo(void)
 {
+       char *cause = get_reset_cause();
+
        printf("SoC: Rockchip %s\n", CONFIG_SYS_SOC);
-       printf("Reset cause: %s\n", get_reset_cause());
+       printf("Reset cause: %s\n", cause);
+
+       /**
+        * reset_reason env is used by rk3288, due to special use case
+        * to figure it the boot behavior. so keep this as it is.
+        */
+       env_set("reset_reason", cause);
 
        /* TODO print operating temparature and clock */
 
        return 0;
 }
+#endif