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