ARM: UniPhier: split clkrst_init() into two functions
Split the current clkrst_init() into two functions:
- early_clkrst_init(): called from SPL
Deassert the reset signals of the memory controller and some other
basic cores.
- clkrst_init(): called from main U-boot
Deassert the reset signals that are necessary for the access to
peripherals etc.
Signed-off-by: Masahiro Yamada <yamada.m@jp.panasonic.com>
diff --git a/arch/arm/mach-uniphier/ph1-pro4/early_clkrst_init.c b/arch/arm/mach-uniphier/ph1-pro4/early_clkrst_init.c
new file mode 100644
index 0000000..ae4185f
--- /dev/null
+++ b/arch/arm/mach-uniphier/ph1-pro4/early_clkrst_init.c
@@ -0,0 +1,26 @@
+/*
+ * Copyright (C) 2011-2015 Panasonic Corporation
+ * Author: Masahiro Yamada <yamada.m@jp.panasonic.com>
+ *
+ * SPDX-License-Identifier: GPL-2.0+
+ */
+
+#include <asm/io.h>
+#include <mach/sc-regs.h>
+
+void early_clkrst_init(void)
+{
+ u32 tmp;
+
+ /* deassert reset */
+ tmp = readl(SC_RSTCTRL);
+ tmp |= SC_RSTCTRL_NRST_UMC1 | SC_RSTCTRL_NRST_UMC0;
+ writel(tmp, SC_RSTCTRL);
+ readl(SC_RSTCTRL); /* dummy read */
+
+ /* privide clocks */
+ tmp = readl(SC_CLKCTRL);
+ tmp |= SC_CLKCTRL_CEN_UMC | SC_CLKCTRL_CEN_SBC | SC_CLKCTRL_CEN_PERI;
+ writel(tmp, SC_CLKCTRL);
+ readl(SC_CLKCTRL); /* dummy read */
+}