[U-Boot] [PATCH v2 17/22] x86: Allow a UART to be set up before the FSP is ready

[Simon Glass]

Since the FSP is a black box it helps to have some sort of debugging
available to check its inputs. If the debug UART is in use, set it up
after CAR is available.

Signed-off-by: Simon Glass <sjg at chromium.org>
---

Changes in v2:
- Remove duplicate prototype of setup_early_uart()

 arch/x86/include/asm/u-boot-x86.h | 3 +++
 arch/x86/lib/fsp/fsp_support.c    | 4 ++++
 2 files changed, 7 insertions(+)

diff --git a/arch/x86/include/asm/u-boot-x86.h b/arch/x86/include/asm/u-boot-x86.h
index b98afa8..5d7dff5 100644
--- a/arch/x86/include/asm/u-boot-x86.h
+++ b/arch/x86/include/asm/u-boot-x86.h
@@ -45,6 +45,9 @@ ulong board_get_usable_ram_top(ulong total_size);
 void dram_init_banksize(void);
 int default_print_cpuinfo(void);
 
+/* Set up a UART which can be used with printch(), printhex8(), etc. */
+int setup_early_uart(void);
+
 void setup_pcat_compatibility(void);
 
 void isa_unmap_rom(u32 addr);
diff --git a/arch/x86/lib/fsp/fsp_support.c b/arch/x86/lib/fsp/fsp_support.c
index 8b639f7..5f96da1 100644
--- a/arch/x86/lib/fsp/fsp_support.c
+++ b/arch/x86/lib/fsp/fsp_support.c
@@ -124,6 +124,10 @@ void fsp_init(u32 stack_top, u32 boot_mode, void *nvs_buf)
 	struct fsp_init_params *params_ptr;
 	struct upd_region *fsp_upd;
 
+#ifdef CONFIG_DEBUG_UART
+	setup_early_uart();
+#endif
+
 	fsp_hdr = find_fsp_header();
 	if (fsp_hdr == NULL) {
 		/* No valid FSP info header was found */
-- 
2.2.0.rc0.207.ga3a616c