ARM: uniphier: remove unused init code for CONFIG_DEBUG_UART

debug_uart_init() is called from spl_board_init(), which is only
compiled for SPL. For U-boot proper, _debug_uart_init() is unreachable,
so dropped by the dead code elimination.

Now that 64-bit SoCs of this SoC family no longer support SPL,
debug-uart-ld20.c is never compiled.
Signed-off-by: NMasahiro Yamada <yamada.masahiro@socionext.com>

arch/arm/mach-uniphier/debug-uart/Makefile

@@ -7,8 +7,6 @@ obj-$(CONFIG_ARCH_UNIPHIER_SLD8)	+= debug-uart-sld8.o
 obj-$(CONFIG_ARCH_UNIPHIER_PRO5)	+= debug-uart-pro5.o
 obj-$(CONFIG_ARCH_UNIPHIER_PXS2)	+= debug-uart-pxs2.o
 obj-$(CONFIG_ARCH_UNIPHIER_LD6B)	+= debug-uart-ld6b.o
-obj-$(CONFIG_ARCH_UNIPHIER_LD11)	+= debug-uart-ld20.o
-obj-$(CONFIG_ARCH_UNIPHIER_LD20)	+= debug-uart-ld20.o
 endif
 
 obj-y					+= debug-uart.o

arch/arm/mach-uniphier/debug-uart/debug-uart-ld20.c

-// SPDX-License-Identifier: GPL-2.0+
-/*
- * Copyright (C) 2016 Masahiro Yamada <yamada.masahiro@socionext.com>
- */
-
-#include <config.h>
-#include <linux/kernel.h>
-#include <linux/io.h>
-
-#include "../sc64-regs.h"
-#include "../sg-regs.h"
-#include "debug-uart.h"
-
-#define UNIPHIER_LD20_UART_CLK		58820000
-
-unsigned int uniphier_ld20_debug_uart_init(void)
-{
-	u32 tmp;
-
-	sg_set_iectrl(54);		/* TXD0 */
-	sg_set_iectrl(58);		/* TXD1 */
-	sg_set_iectrl(90);		/* TXD2 */
-	sg_set_iectrl(94);		/* TXD3 */
-	sg_set_pinsel(54, 0, 8, 4);	/* TXD0 -> TXD0 */
-	sg_set_pinsel(58, 1, 8, 4);	/* SPITXD1 -> TXD1 */
-	sg_set_pinsel(90, 1, 8, 4);	/* PC0WE -> TXD2 */
-	sg_set_pinsel(94, 1, 8, 4);	/* PCD00 -> TXD3 */
-
-	tmp = readl(SC_CLKCTRL4);
-	tmp |= SC_CLKCTRL4_PERI;
-	writel(tmp, SC_CLKCTRL4);
-
-	return DIV_ROUND_CLOSEST(UNIPHIER_LD20_UART_CLK, 16 * CONFIG_BAUDRATE);
-}

arch/arm/mach-uniphier/debug-uart/debug-uart.c

@@ -28,6 +28,7 @@ static void _debug_uart_putc(int c)
 
 void _debug_uart_init(void)
 {
+#ifdef CONFIG_SPL_BUILD
 	void __iomem *base = (void __iomem *)CONFIG_DEBUG_UART_BASE;
 	unsigned int divisor;
 
@@ -61,12 +62,6 @@ void _debug_uart_init(void)
 	case UNIPHIER_LD6B_ID:
 		divisor = uniphier_ld6b_debug_uart_init();
 		break;
-#endif
-#if defined(CONFIG_ARCH_UNIPHIER_LD11) || defined(CONFIG_ARCH_UNIPHIER_LD20)
-	case UNIPHIER_LD11_ID:
-	case UNIPHIER_LD20_ID:
-		divisor = uniphier_ld20_debug_uart_init();
-		break;
 #endif
 	default:
 		return;
@@ -75,5 +70,6 @@ void _debug_uart_init(void)
 	writel(UART_LCR_WLEN8 << 8, base + UNIPHIER_UART_LCR_MCR);
 
 	writel(divisor, base + UNIPHIER_UART_LDR);
+#endif
 }
 DEBUG_UART_FUNCS

arch/arm/mach-uniphier/debug-uart/debug-uart.h

@@ -12,7 +12,5 @@ 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 */