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Diffstat (limited to 'arch/arm/mach-uniphier/ph1-pro4/lowlevel_debug.S')
-rw-r--r--arch/arm/mach-uniphier/ph1-pro4/lowlevel_debug.S39
1 files changed, 39 insertions, 0 deletions
diff --git a/arch/arm/mach-uniphier/ph1-pro4/lowlevel_debug.S b/arch/arm/mach-uniphier/ph1-pro4/lowlevel_debug.S
new file mode 100644
index 0000000000..a793b7c118
--- /dev/null
+++ b/arch/arm/mach-uniphier/ph1-pro4/lowlevel_debug.S
@@ -0,0 +1,39 @@
+/*
+ * On-chip UART initializaion for low-level debugging
+ *
+ * Copyright (C) 2014 Panasonic Corporation
+ * Author: Masahiro Yamada <yamada.m@jp.panasonic.com>
+ *
+ * SPDX-License-Identifier: GPL-2.0+
+ */
+
+#include <linux/linkage.h>
+#include <asm/arch/sc-regs.h>
+#include <asm/arch/sg-regs.h>
+
+#define UART_CLK 73728000
+#include <asm/arch/debug-uart.S>
+
+ENTRY(setup_lowlevel_debug)
+ ldr r0, =SC_CLKCTRL
+ ldr r1, [r0]
+ orr r1, r1, #SC_CLKCTRL_CLK_PERI
+ str r1, [r0]
+
+ init_debug_uart r0, r1, r2
+
+ /* UART Port 0 */
+ set_pinsel 127, 0, r0, r1
+ set_pinsel 128, 0, r0, r1
+
+ ldr r0, =SG_LOADPINCTRL
+ mov r1, #1
+ str r1, [r0]
+
+ ldr r0, =SG_IECTRL
+ ldr r1, [r0]
+ orr r1, r1, #1
+ str r1, [r0]
+
+ mov pc, lr
+ENDPROC(setup_lowlevel_debug)
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