ARM: uniphier: add PH1-LD20 SoC support

This is the first ARMv8 SoC from Socionext Inc.

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>

1 files changed, 38 insertions, 0 deletions

diff --git a/arch/arm/mach-uniphier/arm64/timer.c b/arch/arm/mach-uniphier/arm64/timer.c
new file mode 100644
index 0000000000..4beab9dca8
--- /dev/null
+++ b/arch/arm/mach-uniphier/arm64/timer.c
@@ -0,0 +1,38 @@
+/*
+ * Copyright (C) 2016 Masahiro Yamada <yamada.masahiro@socionext.com>
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#include <common.h>
+#include <mapmem.h>
+#include <linux/bitops.h>
+#include <linux/io.h>
+#include <linux/sizes.h>
+
+#define CNT_CONTROL_BASE	0x60E00000
+
+#define CNTCR			0x000
+#define   CNTCR_EN			BIT(0)
+
+/* setup ARMv8 Generic Timer */
+int timer_init(void)
+{
+	void __iomem *base;
+	u32 tmp;
+
+	base = map_sysmem(CNT_CONTROL_BASE, SZ_4K);
+
+	/*
+	 * Note:
+	 * In a system that implements both Secure and Non-secure states,
+	 * this register is only writable in Secure state.
+	 */
+	tmp = readl(base + CNTCR);
+	tmp |= CNTCR_EN;
+	writel(tmp, base + CNTCR);
+
+	unmap_sysmem(base);
+
+	return 0;
+}