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arm64: mach-k3: am625_init: Probe ESM nodes

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On AM62x devices, main ESM error event outputs can be routed to
MCU ESM as inputs. So, two ESM device nodes are expected in the
device tree : one for main ESM and another one for MCU ESM.
MCU ESM error output can trigger the reset logic to reset
the device when CTRLMMR_MCU_RST_CTRL:MCU_ESM_ERROR_RESET_EN_Z is
set to '0'.

Signed-off-by: Julien Panis <jpanis@baylibre.com>
This commit is contained in:
Julien Panis 2022-07-01 14:30:11 +02:00 committed by Tom Rini
parent 3128c890f2
commit 169582025a
2 changed files with 26 additions and 0 deletions
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23
arch/arm/mach-k3/am625_init.c
View file

@ -64,6 +64,15 @@ static void ctrl_mmr_unlock(void)
mmr_unlock(PADCFG_MMR1_BASE, 1);
}
static __maybe_unused void enable_mcu_esm_reset(void)
{
/* Set CTRLMMR_MCU_RST_CTRL:MCU_ESM_ERROR_RST_EN_Z to '0' (low active) */
u32 stat = readl(CTRLMMR_MCU_RST_CTRL);
stat &= RST_CTRL_ESM_ERROR_RST_EN_Z_MASK;
writel(stat, CTRLMMR_MCU_RST_CTRL);
}
void board_init_f(ulong dummy)
{
struct udevice *dev;
@ -142,6 +151,20 @@ void board_init_f(ulong dummy)
/* Output System Firmware version info */
k3_sysfw_print_ver();
if (IS_ENABLED(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();
}
#if defined(CONFIG_K3_AM64_DDRSS)
ret = uclass_get_device(UCLASS_RAM, 0, &dev);
if (ret)

3
arch/arm/mach-k3/include/mach/am62_hardware.h
View file

@ -29,6 +29,7 @@
#define MAIN_DEVSTAT_BACKUP_BOOTMODE_SHIFT 10
#define MAIN_DEVSTAT_BACKUP_BOOTMODE_CFG_MASK BIT(13)
#define MAIN_DEVSTAT_BACKUP_BOOTMODE_CFG_SHIFT 13
#define RST_CTRL_ESM_ERROR_RST_EN_Z_MASK (~BIT(17))
/* Primary Bootmode MMC Config macros */
#define MAIN_DEVSTAT_PRIMARY_MMC_PORT_MASK 0x4
@ -67,6 +68,8 @@
#define MCU_CTRL_DEVICE_CLKOUT_32K_CTRL (MCU_CTRL_MMR0_BASE + 0x8058)
#define MCU_CTRL_DEVICE_CLKOUT_LFOSC_SELECT_VAL (0x3)
#define CTRLMMR_MCU_RST_CTRL (MCU_CTRL_MMR0_BASE + 0x18170)
#define ROM_ENTENDED_BOOT_DATA_INFO 0x43c3f1e0
/* Use Last 2K as Scratch pad */