ARM: uniphier: support Debug UART
For ARM32 architecture, CONFIG_DEBUG_LL is available for early
low-level debugging (and actually UniPhier 32bit SoCs use it), but
ARM64 architecture does not support it. Instead, CONFIG_DEBUG_UART
is available as an architecture-independent debug facility.
This commit supports it on all the UniPhier SoCs (including the new
ARMv8 SoCs), which is very useful for new SoC bringups.
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
diff --git a/arch/arm/mach-uniphier/debug-uart/debug-uart.h b/arch/arm/mach-uniphier/debug-uart/debug-uart.h
new file mode 100644
index 0000000..8de9124
--- /dev/null
+++ b/arch/arm/mach-uniphier/debug-uart/debug-uart.h
@@ -0,0 +1,20 @@
+/*
+ * Copyright (C) 2016 Masahiro Yamada <yamada.masahiro@socionext.com>
+ *
+ * SPDX-License-Identifier: GPL-2.0+
+ */
+
+#ifndef _MACH_DEBUG_UART_H
+#define _MACH_DEBUG_UART_H
+
+unsigned int uniphier_sld3_debug_uart_init(void);
+unsigned int uniphier_ld4_debug_uart_init(void);
+unsigned int uniphier_pro4_debug_uart_init(void);
+unsigned int uniphier_sld8_debug_uart_init(void);
+unsigned int uniphier_pro5_debug_uart_init(void);
+unsigned int uniphier_pxs2_debug_uart_init(void);
+unsigned int uniphier_ld6b_debug_uart_init(void);
+unsigned int uniphier_ld11_debug_uart_init(void);
+unsigned int uniphier_ld20_debug_uart_init(void);
+
+#endif /* _MACH_DEBUG_UART_H */