1 files changed, 31 insertions, 0 deletions
diff --git a/arch/arm/mach-uniphier/clk/clk-early-ld4.c b/arch/arm/mach-uniphier/clk/clk-early-ld4.c
new file mode 100644
index 0000000000..07b916dc9a
--- /dev/null
+++ b/arch/arm/mach-uniphier/clk/clk-early-ld4.c
@@ -0,0 +1,31 @@
+/*
+ * Copyright (C) 2011-2014 Panasonic Corporation
+ * Copyright (C) 2015-2017 Socionext Inc.
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#include <common.h>
+#include <spl.h>
+#include <linux/io.h>
+
+#include "../init.h"
+#include "../sc-regs.h"
+
+void uniphier_ld4_early_clk_init(void)
+{
+	u32 tmp;
+
+	/* deassert reset */
+	if (spl_boot_device() != BOOT_DEVICE_NAND) {
+		tmp = readl(SC_RSTCTRL);
+		tmp &= ~SC_RSTCTRL_NRST_NAND;
+		writel(tmp, SC_RSTCTRL);
+	};
+
+	/* provide clocks */
+	tmp = readl(SC_CLKCTRL);
+	tmp |= SC_CLKCTRL_CEN_SBC | SC_CLKCTRL_CEN_PERI;
+	writel(tmp, SC_CLKCTRL);
+	readl(SC_CLKCTRL); /* dummy read */
+}