board: ti: am62px: Enable 32k crystal on the board

Enable 32k crystal on the board. If external 32k source is not
used, 32k rc-osc comes into play, which is accurate to +-20%.

Signed-off-by: Vishal Mahaveer <vishalm@ti.com>

board/ti/am62px/evm.c

@@ -16,6 +16,7 @@
 #include <spl.h>
 #include <asm/arch/k3-ddr.h>
 #include "../common/fdt_ops.h"
+#include "../common/k3_32k_lfosc.h"
 
 struct efi_fw_image fw_images[] = {
 	{
@@ -45,6 +46,9 @@ struct efi_capsule_update_info update_info = {
 #if IS_ENABLED(CONFIG_SPL_BUILD)
 void spl_board_init(void)
 {
+	if (IS_ENABLED(CONFIG_TI_K3_BOARD_LFOSC))
+		enable_32k_lfosc();
+
 	enable_caches();
 }
 #endif

configs/am62px_evm_r5_defconfig

@@ -122,3 +122,5 @@ CONFIG_SPL_TIMER=y
 CONFIG_OMAP_TIMER=y
 CONFIG_LIB_RATIONAL=y
 CONFIG_SPL_LIB_RATIONAL=y
+CONFIG_SPL_BOARD_INIT=y
+CONFIG_TI_K3_BOARD_LFOSC=y