From: Andreas Dannenberg dannenberg@ti.com
Use the System Firmware (SYSFW) loader framework to load and start the SYSFW as part of the J721E early initialization sequence. While at it also initialize the MCU_UART0 pinmux as it is used by SYSFW to print diagnostic messages.
Signed-off-by: Andreas Dannenberg dannenberg@ti.com Signed-off-by: Lokesh Vutla lokeshvutla@ti.com --- arch/arm/mach-k3/j721e_init.c | 30 ++++++++++++++++++++++++++++++ 1 file changed, 30 insertions(+)
diff --git a/arch/arm/mach-k3/j721e_init.c b/arch/arm/mach-k3/j721e_init.c index 5514dc963e..733e414654 100644 --- a/arch/arm/mach-k3/j721e_init.c +++ b/arch/arm/mach-k3/j721e_init.c @@ -11,9 +11,13 @@ #include <asm/io.h> #include <asm/armv7_mpu.h> #include <asm/arch/hardware.h> +#include <asm/arch/sysfw-loader.h> #include "common.h" #include <asm/arch/sys_proto.h> #include <linux/soc/ti/ti_sci_protocol.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) @@ -69,6 +73,10 @@ static void store_boot_index_from_rom(void)
void board_init_f(ulong dummy) { +#if defined(CONFIG_K3_LOAD_SYSFW) + struct udevice *dev; + int ret; +#endif /* * Cannot delay this further as there is a chance that * K3_BOOT_PARAM_TABLE_INDEX can be over written by SPL MALLOC section. @@ -85,8 +93,30 @@ void board_init_f(ulong dummy) /* Init DM early */ spl_early_init();
+#ifdef CONFIG_K3_LOAD_SYSFW + /* + * Process pinctrl for the serial0 a.k.a. MCU_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 }
u32 spl_boot_mode(const u32 boot_device)