1 /* 2 * Copyright (C) 2015-2017 Socionext Inc. 3 * 4 * SPDX-License-Identifier: GPL-2.0+ 5 */ 6 7 #include <linux/io.h> 8 9 #include "../init.h" 10 #include "../sc-regs.h" 11 12 void uniphier_pro5_dram_clk_init(void) 13 { 14 u32 tmp; 15 16 /* 17 * deassert reset 18 * UMCA2: Ch1 (DDR3) 19 * UMCA1, UMC31: Ch0 (WIO1) 20 * UMCA0, UMC30: Ch0 (WIO0) 21 */ 22 tmp = readl(SC_RSTCTRL4); 23 tmp |= SC_RSTCTRL4_NRST_UMCSB | SC_RSTCTRL4_NRST_UMCA2 | 24 SC_RSTCTRL4_NRST_UMCA1 | SC_RSTCTRL4_NRST_UMCA0 | 25 SC_RSTCTRL4_NRST_UMC31 | SC_RSTCTRL4_NRST_UMC30; 26 writel(tmp, SC_RSTCTRL4); 27 readl(SC_RSTCTRL4); /* dummy read */ 28 29 /* provide clocks */ 30 tmp = readl(SC_CLKCTRL4); 31 tmp |= SC_CLKCTRL4_CEN_UMCSB | SC_CLKCTRL4_CEN_UMC1 | 32 SC_CLKCTRL4_CEN_UMC0; 33 writel(tmp, SC_CLKCTRL4); 34 readl(SC_CLKCTRL4); /* dummy read */ 35 } 36