Use the System Firmware (SYSFW) loader framework to load and start the SYSFW as part of the AM654 early initialization sequence. While at it also initialize the WKUP_UART0 pinmux as it is used by SYSFW to print diagnostic messages.
Signed-off-by: Andreas Dannenberg dannenberg@ti.com --- arch/arm/mach-k3/am6_init.c | 27 ++++++++++++++++++++++++++- board/ti/am65x/Kconfig | 1 + 2 files changed, 27 insertions(+), 1 deletion(-)
diff --git a/arch/arm/mach-k3/am6_init.c b/arch/arm/mach-k3/am6_init.c index 22477efa5b..f50eded03f 100644 --- a/arch/arm/mach-k3/am6_init.c +++ b/arch/arm/mach-k3/am6_init.c @@ -10,8 +10,11 @@ #include <asm/io.h> #include <spl.h> #include <asm/arch/hardware.h> +#include <asm/arch/sysfw-loader.h> #include "common.h" #include <dm.h> +#include <dm/uclass-internal.h> +#include <dm/pinctrl.h>
#ifdef CONFIG_SPL_BUILD static void mmr_unlock(u32 base, u32 partition) @@ -63,7 +66,7 @@ static void store_boot_index_from_rom(void)
void board_init_f(ulong dummy) { -#if defined(CONFIG_K3_AM654_DDRSS) +#if defined(CONFIG_K3_LOAD_SYSFW) || defined(CONFIG_K3_AM654_DDRSS) struct udevice *dev; int ret; #endif @@ -90,8 +93,30 @@ void board_init_f(ulong dummy) /* Init DM early in-order to invoke system controller */ spl_early_init();
+#ifdef CONFIG_K3_LOAD_SYSFW + /* + * Process pinctrl for the serial0 a.k.a. WKUP_UART0 module and continue + * regardless of the result of pinctrl. Do this without probing the + * device, but instead by searching the device that would request the + * given sequence number if probed. The UART will be used by the system + * firmware (SYSFW) image for various purposes and SYSFW depends on us + * to initialize its pin settings. + */ + ret = uclass_find_device_by_seq(UCLASS_SERIAL, 0, true, &dev); + if (!ret) + pinctrl_select_state(dev, "default"); + + /* + * Load, start up, and configure system controller firmware. Provide + * the U-Boot console init function to the SYSFW post-PM configuration + * callback hook, effectively switching on (or over) the console + * output. + */ + k3_sysfw_loader(preloader_console_init); +#else /* Prepare console output */ preloader_console_init(); +#endif
#ifdef CONFIG_K3_AM654_DDRSS ret = uclass_get_device(UCLASS_RAM, 0, &dev); diff --git a/board/ti/am65x/Kconfig b/board/ti/am65x/Kconfig index 98172c28f5..60bb834aca 100644 --- a/board/ti/am65x/Kconfig +++ b/board/ti/am65x/Kconfig @@ -18,6 +18,7 @@ config TARGET_AM654_R5_EVM select CPU_V7R select SYS_THUMB_BUILD select SOC_K3_AM6 + select K3_LOAD_SYSFW select K3_AM654_DDRSS imply SYS_K3_SPL_ATF