From 198a97a6abe7090109002baea0d2cb46070955aa Mon Sep 17 00:00:00 2001 From: Masahiro Yamada Date: Fri, 27 Feb 2015 02:26:51 +0900 Subject: 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 --- .../arm/mach-uniphier/ph1-pro4/early_clkrst_init.c | 26 ++++++++++++++++++++++ 1 file changed, 26 insertions(+) create mode 100644 arch/arm/mach-uniphier/ph1-pro4/early_clkrst_init.c (limited to 'arch/arm/mach-uniphier/ph1-pro4/early_clkrst_init.c') 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 + * + * SPDX-License-Identifier: GPL-2.0+ + */ + +#include +#include + +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 */ +} -- cgit v1.2.1