armV7R: K3: am654: Load SYSFW binary and config from boot media
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>
diff --git a/arch/arm/mach-k3/am6_init.c b/arch/arm/mach-k3/am6_init.c
index 60a5803..e326f57 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 @@
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
@@ -83,8 +86,30 @@
/* 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);