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imx: cpu.c: give access to reset cause in spl

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This makes get_imx_reset_cause() accessible in SPL, but keeps the SRSR
register content intact so that U-Boot proper can evaluated the
reset_cause again should this be needed.

Signed-off-by: Max Krummenacher <max.krummenacher@toradex.com>
Acked-by: Marcel Ziswiler <marcel.ziswiler@toradex.com>
This commit is contained in:
Max Krummenacher
2019-02-01 16:04:51 +01:00
committed by Stefano Babic
parent a24532083c
commit 6ed4d26c21
1 changed files with 15 additions and 12 deletions
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27
arch/arm/mach-imx/cpu.c
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@@ -25,19 +25,27 @@
#include <fsl_esdhc.h> #include <fsl_esdhc.h>
#endif #endif
#if defined(CONFIG_DISPLAY_CPUINFO) && !defined(CONFIG_SPL_BUILD)
static u32 reset_cause = -1; static u32 reset_cause = -1;
static char *get_reset_cause(void) u32 get_imx_reset_cause(void)
{ {
u32 cause;
struct src *src_regs = (struct src *)SRC_BASE_ADDR; struct src *src_regs = (struct src *)SRC_BASE_ADDR;
cause = readl(&src_regs->srsr); if (reset_cause == -1) {
writel(cause, &src_regs->srsr); reset_cause = readl(&src_regs->srsr);
reset_cause = cause; /* preserve the value for U-Boot proper */
#if !defined(CONFIG_SPL_BUILD)
writel(reset_cause, &src_regs->srsr);
#endif
}
switch (cause) { return reset_cause;
}
#if defined(CONFIG_DISPLAY_CPUINFO) && !defined(CONFIG_SPL_BUILD)
static char *get_reset_cause(void)
{
switch (get_imx_reset_cause()) {
case 0x00001: case 0x00001:
case 0x00011: case 0x00011:
return "POR"; return "POR";
@@ -77,11 +85,6 @@ static char *get_reset_cause(void)
return "unknown reset"; return "unknown reset";
} }
} }
u32 get_imx_reset_cause(void)
{
return reset_cause;
}
#endif #endif
#if defined(CONFIG_MX53) || defined(CONFIG_MX6) #if defined(CONFIG_MX53) || defined(CONFIG_MX6)