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

/*
 * Copyright (C) 2011-2015 Masahiro Yamada <yamada.m@jp.panasonic.com>
 *
 * SPDX-License-Identifier:	GPL-2.0+
 */

#include <common.h>
#include <spl.h>
#include <linux/io.h>

#include "../init.h"
#include "../sc-regs.h"

int ph1_ld4_early_clk_init(const struct uniphier_board_data *bd)
{
	u32 tmp;

	/* deassert reset */
	tmp = readl(SC_RSTCTRL);

	tmp |= SC_RSTCTRL_NRST_UMC1 | SC_RSTCTRL_NRST_UMC0;
	if (spl_boot_device() != BOOT_DEVICE_NAND)
		tmp &= ~SC_RSTCTRL_NRST_NAND;
	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 */

	return 0;
}
Commit	Line	Data
198a97a6	1	/*
f6e7f07c	2	* Copyright (C) 2011-2015 Masahiro Yamada <yamada.m@jp.panasonic.com>
198a97a6 MY	3	*
	4	* SPDX-License-Identifier: GPL-2.0+
	5	*/
	6
d3384bf7 MY	7	#include <common.h>
d3384bf7 MY	8	#include <spl.h>
f6e7f07c	9	#include <linux/io.h>
107b3fb4 MY	10
	11	#include "../init.h"
	12	#include "../sc-regs.h"
198a97a6	13
323d1f9d	14	int ph1_ld4_early_clk_init(const struct uniphier_board_data *bd)
198a97a6 MY	15	{
	16	u32 tmp;
	17
	18	/* deassert reset */
	19	tmp = readl(SC_RSTCTRL);
d3384bf7	20
198a97a6	21	tmp \|= SC_RSTCTRL_NRST_UMC1 \| SC_RSTCTRL_NRST_UMC0;
d3384bf7 MY	22	if (spl_boot_device() != BOOT_DEVICE_NAND)
d3384bf7 MY	23	tmp &= ~SC_RSTCTRL_NRST_NAND;
198a97a6 MY	24	writel(tmp, SC_RSTCTRL);
	25	readl(SC_RSTCTRL); /* dummy read */
	26
	27	/* privide clocks */
	28	tmp = readl(SC_CLKCTRL);
	29	tmp \|= SC_CLKCTRL_CEN_UMC \| SC_CLKCTRL_CEN_SBC \| SC_CLKCTRL_CEN_PERI;
	30	writel(tmp, SC_CLKCTRL);
	31	readl(SC_CLKCTRL); /* dummy read */
323d1f9d MY	32
323d1f9d MY	33	return 0;
198a97a6	34	}