[people/ms/u-boot.git] / arch / arm / mach-uniphier / clk / clk-dram-ld4.c

/*
 * Copyright (C) 2011-2014 Panasonic Corporation
 * Copyright (C) 2015-2017 Socionext Inc.
 *
 * SPDX-License-Identifier:	GPL-2.0+
 */

#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_RSTCTRL);
	tmp |= SC_RSTCTRL_NRST_UMC1 | SC_RSTCTRL_NRST_UMC0;
	writel(tmp, SC_RSTCTRL);
	readl(SC_RSTCTRL); /* dummy read */

	/* provide clocks */
	tmp = readl(SC_CLKCTRL);
	tmp |= SC_CLKCTRL_CEN_UMC;
	writel(tmp, SC_CLKCTRL);
	readl(SC_CLKCTRL); /* dummy read */
}
Commit	Line	Data
198a97a6	1	/*
78c627cf MY	2	* Copyright (C) 2011-2014 Panasonic Corporation
78c627cf MY	3	* Copyright (C) 2015-2017 Socionext Inc.
198a97a6 MY	4	*
	5	* SPDX-License-Identifier: GPL-2.0+
	6	*/
	7
d3384bf7 MY	8	#include <common.h>
d3384bf7 MY	9	#include <spl.h>
f6e7f07c	10	#include <linux/io.h>
107b3fb4 MY	11
	12	#include "../init.h"
	13	#include "../sc-regs.h"
198a97a6	14
00aa453e	15	void uniphier_ld4_dram_clk_init(void)
198a97a6 MY	16	{
	17	u32 tmp;
	18
	19	/* deassert reset */
	20	tmp = readl(SC_RSTCTRL);
	21	tmp \|= SC_RSTCTRL_NRST_UMC1 \| SC_RSTCTRL_NRST_UMC0;
	22	writel(tmp, SC_RSTCTRL);
	23	readl(SC_RSTCTRL); /* dummy read */
	24
67976306	25	/* provide clocks */
198a97a6	26	tmp = readl(SC_CLKCTRL);
78c627cf	27	tmp \|= SC_CLKCTRL_CEN_UMC;
198a97a6 MY	28	writel(tmp, SC_CLKCTRL);
	29	readl(SC_CLKCTRL); /* dummy read */
	30	}