eaw/u-boot
1
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity

imx: imx9: disable watchdog

Browse Source 
Disable all 3 wdogs on AIPS2 and unmask SRC reset trigger for WDOG3-5

Signed-off-by: Ye Li <ye.li@nxp.com>
Signed-off-by: Peng Fan <peng.fan@nxp.com>
This commit is contained in:
Ye Li
2022-07-26 16:40:47 +08:00
committed by Stefano Babic
parent 53cf550d23
commit 2c5f5457bc
2 changed files with 48 additions and 1 deletions
Download Patch File Download Diff File Expand all files Collapse all files

4
arch/arm/include/asm/arch-imx9/imx-regs.h
View File

@@ -15,4 +15,8 @@
#define ANATOP_BASE_ADDR 0x44480000UL
#define WDG3_BASE_ADDR 0x42490000UL
#define WDG4_BASE_ADDR 0x424a0000UL
#define WDG5_BASE_ADDR 0x424b0000UL
#endif

45
arch/arm/mach-imx/imx9/soc.c
View File

@@ -34,6 +34,45 @@ u32 get_cpu_rev(void)
return (MXC_CPU_IMX93 << 12) | CHIP_REV_1_0;
}
#define UNLOCK_WORD 0xD928C520 /* unlock word */
#define REFRESH_WORD 0xB480A602 /* refresh word */
static void disable_wdog(void __iomem *wdog_base)
{
u32 val_cs = readl(wdog_base + 0x00);
if (!(val_cs & 0x80))
return;
/* default is 32bits cmd */
writel(REFRESH_WORD, (wdog_base + 0x04)); /* Refresh the CNT */
if (!(val_cs & 0x800)) {
writel(UNLOCK_WORD, (wdog_base + 0x04));
while (!(readl(wdog_base + 0x00) & 0x800))
;
}
writel(0x0, (wdog_base + 0x0C)); /* Set WIN to 0 */
writel(0x400, (wdog_base + 0x08)); /* Set timeout to default 0x400 */
writel(0x2120, (wdog_base + 0x00)); /* Disable it and set update */
while (!(readl(wdog_base + 0x00) & 0x400))
;
}
void init_wdog(void)
{
u32 src_val;
disable_wdog((void __iomem *)WDG3_BASE_ADDR);
disable_wdog((void __iomem *)WDG4_BASE_ADDR);
disable_wdog((void __iomem *)WDG5_BASE_ADDR);
src_val = readl(0x54460018); /* reset mask */
src_val &= ~0x1c;
writel(src_val, 0x54460018);
}
static struct mm_region imx93_mem_map[] = {
{
/* ROM */
@@ -123,8 +162,12 @@ int ft_system_setup(void *blob, struct bd_info *bd)
int arch_cpu_init(void)
{
if (IS_ENABLED(CONFIG_SPL_BUILD))
if (IS_ENABLED(CONFIG_SPL_BUILD)) {
/* Disable wdog */
init_wdog();
clock_init();
}
return 0;
}