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authorMasahiro Yamada <yamada.m@jp.panasonic.com>2015-02-27 02:26:51 +0900
committerMasahiro Yamada <yamada.m@jp.panasonic.com>2015-03-01 00:02:36 +0900
commit198a97a6abe7090109002baea0d2cb46070955aa (patch)
tree4ee4cea278f41d5f16147152028785e3891cf97b /arch/arm/mach-uniphier/ph1-pro4/early_clkrst_init.c
parentf267b81e20da095539c7da7103afbd1e1b39b20b (diff)
downloadtalos-obmc-uboot-198a97a6abe7090109002baea0d2cb46070955aa.tar.gz
talos-obmc-uboot-198a97a6abe7090109002baea0d2cb46070955aa.zip
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>
Diffstat (limited to 'arch/arm/mach-uniphier/ph1-pro4/early_clkrst_init.c')
-rw-r--r--arch/arm/mach-uniphier/ph1-pro4/early_clkrst_init.c26
1 files changed, 26 insertions, 0 deletions
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 0000000000..ae4185fa90
--- /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 */
+}
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