On AM64x devices, it is possible to route Main ESM0 error events to MCU ESM. MCU ESM high error output can trigger the reset logic to reset the device. So, for these devices we expect two ESM device nodes in the device tree, one for Main ESM and the another MCU ESM in the device tree. When these ESM device nodes are properly configired it is possible to route the Main RTI0 WWDT output to the MCU ESM high ouput through Main ESM and trigger a device reset when CTRLMMR_MCU_RST_CTRL:MCU_ESM_ERROR_RESET_EN_Z is set to '0'.
On K3 AM64x devices, the R5 SPL u-boot handles the ESM device node configurations.
Signed-off-by: Hari Nagalla hnagalla@ti.com --- arch/arm/mach-k3/am642_init.c | 29 +++++++++++++++++++++++++---- 1 file changed, 25 insertions(+), 4 deletions(-)
diff --git a/arch/arm/mach-k3/am642_init.c b/arch/arm/mach-k3/am642_init.c index 543dea02bc..f171c1e254 100644 --- a/arch/arm/mach-k3/am642_init.c +++ b/arch/arm/mach-k3/am642_init.c @@ -24,12 +24,22 @@ #include <dm/root.h>
#if defined(CONFIG_SPL_BUILD) +#define MCU_CTRL_MMR0_BASE 0x04500000 +#define CTRLMMR_MCU_RST_CTRL 0x04518170
static void ctrl_mmr_unlock(void) { /* Unlock all PADCFG_MMR1 module registers */ mmr_unlock(PADCFG_MMR1_BASE, 1);
+ /* Unlock all MCU_CTRL_MMR0 module registers */ + mmr_unlock(MCU_CTRL_MMR0_BASE, 0); + mmr_unlock(MCU_CTRL_MMR0_BASE, 1); + mmr_unlock(MCU_CTRL_MMR0_BASE, 2); + mmr_unlock(MCU_CTRL_MMR0_BASE, 3); + mmr_unlock(MCU_CTRL_MMR0_BASE, 4); + mmr_unlock(MCU_CTRL_MMR0_BASE, 6); + /* Unlock all CTRL_MMR0 module registers */ mmr_unlock(CTRL_MMR0_BASE, 0); mmr_unlock(CTRL_MMR0_BASE, 1); @@ -37,9 +47,6 @@ static void ctrl_mmr_unlock(void) mmr_unlock(CTRL_MMR0_BASE, 3); mmr_unlock(CTRL_MMR0_BASE, 5); mmr_unlock(CTRL_MMR0_BASE, 6); - - /* Unlock all MCU_PADCFG_MMR1 module registers */ - mmr_unlock(MCU_PADCFG_MMR1_BASE, 1); }
/* @@ -144,7 +151,7 @@ int fdtdec_board_setup(const void *fdt_blob)
void board_init_f(ulong dummy) { -#if defined(CONFIG_K3_LOAD_SYSFW) || defined(CONFIG_K3_AM64_DDRSS) +#if defined(CONFIG_K3_LOAD_SYSFW) || defined(CONFIG_K3_AM64_DDRSS) || defined(CONFIG_ESM_K3) struct udevice *dev; int ret; #endif @@ -194,6 +201,20 @@ void board_init_f(ulong dummy) /* Output System Firmware version info */ k3_sysfw_print_ver();
+#if defined(CONFIG_ESM_K3) + /* Probe/configure ESM0 */ + ret = uclass_get_device_by_name(UCLASS_MISC, "esm@420000", &dev); + if (ret) + printf("esm main init failed: %d\n", ret); + + /* Probe/configure MCUESM */ + ret = uclass_get_device_by_name(UCLASS_MISC, "esm@4100000", &dev); + if (ret) + printf("esm mcu init failed: %d\n", ret); + + enable_mcu_esm_reset(); +#endif + #if defined(CONFIG_K3_AM64_DDRSS) ret = uclass_get_device(UCLASS_RAM, 0, &dev); if (ret)