1 /* 2 * Copyright (C) 2016-2017 Socionext Inc. 3 * 4 * SPDX-License-Identifier: GPL-2.0+ 5 */ 6 7 #include <common.h> 8 #include <spl.h> 9 #include <linux/io.h> 10 11 #include "../init.h" 12 #include "../sc-regs.h" 13 14 void uniphier_pxs2_dram_clk_init(void) 15 { 16 u32 tmp; 17 18 /* deassert reset */ 19 tmp = readl(SC_RSTCTRL4); 20 tmp |= SC_RSTCTRL4_NRST_UMCSB | SC_RSTCTRL4_NRST_UMCA2 | 21 SC_RSTCTRL4_NRST_UMCA1 | SC_RSTCTRL4_NRST_UMCA0 | 22 SC_RSTCTRL4_NRST_UMC32 | SC_RSTCTRL4_NRST_UMC31 | 23 SC_RSTCTRL4_NRST_UMC30; 24 writel(tmp, SC_RSTCTRL4); 25 readl(SC_RSTCTRL4); /* dummy read */ 26 27 /* provide clocks */ 28 tmp = readl(SC_CLKCTRL4); 29 tmp |= SC_CLKCTRL4_CEN_UMCSB | SC_CLKCTRL4_CEN_UMC2 | 30 SC_CLKCTRL4_CEN_UMC1 | SC_CLKCTRL4_CEN_UMC0; 31 writel(tmp, SC_CLKCTRL4); 32 readl(SC_CLKCTRL4); /* dummy read */ 33 } 34