GK SDK 源码库: XMIPCLinuxV100R005C00SPC030 (kernel/tools/open_source excluded)

2026-09-06 03:52:57 +08:00
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+// 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 "../sc-regs.h"
+#include "../sg-regs.h"
+#include "debug-uart.h"
+
+#define UNIPHIER_LD6B_UART_CLK		88888888
+
+unsigned int uniphier_ld6b_debug_uart_init(void)
+{
+	u32 tmp;
+
+	sg_set_iectrl(0);
+	sg_set_pinsel(135, 3, 8, 4);	/* PORT10 -> TXD0 */
+	sg_set_pinsel(115, 0, 8, 4);	/* TXD1 -> TXD1 */
+	sg_set_pinsel(113, 2, 8, 4);	/* SBO0 -> TXD2 */
+
+	tmp = readl(sc_base + SC_CLKCTRL);
+	tmp |= SC_CLKCTRL_CEN_PERI;
+	writel(tmp, sc_base + SC_CLKCTRL);
+
+	return DIV_ROUND_CLOSEST(UNIPHIER_LD6B_UART_CLK, 16 * CONFIG_BAUDRATE);
+}