u-boot/arch/arm/mach-uniphier/clk/clk-dram-ld4.c
Masahiro Yamada 739ba41d5a ARM: uniphier: de-couple SC macros into base address and offset
The SC_* macros represent the address of SysCtrl registers.
For a planned new SoC, its base address will be changed.

Turn the SC_* macros into the offset from the base address.

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
2019-07-10 22:42:02 +09:00

29 lines
659 B
C

// SPDX-License-Identifier: GPL-2.0+
/*
* Copyright (C) 2011-2014 Panasonic Corporation
* Copyright (C) 2015-2017 Socionext Inc.
*/
#include <common.h>
#include <spl.h>
#include <linux/io.h>
#include "../init.h"
#include "../sc-regs.h"
void uniphier_ld4_dram_clk_init(void)
{
u32 tmp;
/* deassert reset */
tmp = readl(sc_base + SC_RSTCTRL);
tmp |= SC_RSTCTRL_NRST_UMC1 | SC_RSTCTRL_NRST_UMC0;
writel(tmp, sc_base + SC_RSTCTRL);
readl(sc_base + SC_RSTCTRL); /* dummy read */
/* provide clocks */
tmp = readl(sc_base + SC_CLKCTRL);
tmp |= SC_CLKCTRL_CEN_UMC;
writel(tmp, sc_base + SC_CLKCTRL);
readl(sc_base + SC_CLKCTRL); /* dummy read */
}