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