u-boot/arch/arm/mach-rockchip/cpu-info.c
Jagan Teki e230c579a3 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>
2020-07-22 20:55:13 +08:00

66 lines
1.3 KiB
C

// SPDX-License-Identifier: (GPL-2.0+ OR MIT)
/*
* (C) Copyright 2019 Amarula Solutions(India)
* Author: Jagan Teki <jagan@amarulasolutions.com>
*/
#include <common.h>
#include <env.h>
#include <init.h>
#include <asm/io.h>
#include <asm/arch-rockchip/clock.h>
#include <asm/arch-rockchip/cru.h>
#include <asm/arch-rockchip/hardware.h>
#include <linux/err.h>
char *get_reset_cause(void)
{
struct rockchip_cru *cru = rockchip_get_cru();
char *cause = NULL;
if (IS_ERR(cru))
return cause;
switch (cru->glb_rst_st) {
case GLB_POR_RST:
cause = "POR";
break;
case FST_GLB_RST_ST:
case SND_GLB_RST_ST:
cause = "RST";
break;
case FST_GLB_TSADC_RST_ST:
case SND_GLB_TSADC_RST_ST:
cause = "THERMAL";
break;
case FST_GLB_WDT_RST_ST:
case SND_GLB_WDT_RST_ST:
cause = "WDOG";
break;
default:
cause = "unknown reset";
}
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", 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