diff options
author | Masahiro Yamada <yamada.m@jp.panasonic.com> | 2015-02-27 02:26:51 +0900 |
---|---|---|
committer | Masahiro Yamada <yamada.m@jp.panasonic.com> | 2015-03-01 00:02:36 +0900 |
commit | 198a97a6abe7090109002baea0d2cb46070955aa (patch) | |
tree | 4ee4cea278f41d5f16147152028785e3891cf97b /arch/arm/mach-uniphier/ph1-pro4/early_clkrst_init.c | |
parent | f267b81e20da095539c7da7103afbd1e1b39b20b (diff) |
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.c | 26 |
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 */ +} |