| /* |
| * Copyright (C) 2015 Masahiro Yamada <yamada.m@jp.panasonic.com> |
| * |
| * SPDX-License-Identifier: GPL-2.0+ |
| */ |
| |
| #include <linux/io.h> |
| |
| #include "../init.h" |
| #include "../sc-regs.h" |
| |
| int uniphier_pro5_early_clk_init(const struct uniphier_board_data *bd) |
| { |
| u32 tmp; |
| |
| /* |
| * deassert reset |
| * UMCA2: Ch1 (DDR3) |
| * UMCA1, UMC31: Ch0 (WIO1) |
| * UMCA0, UMC30: Ch0 (WIO0) |
| */ |
| tmp = readl(SC_RSTCTRL4); |
| tmp |= SC_RSTCTRL4_NRST_UMCSB | SC_RSTCTRL4_NRST_UMCA2 | |
| SC_RSTCTRL4_NRST_UMCA1 | SC_RSTCTRL4_NRST_UMCA0 | |
| SC_RSTCTRL4_NRST_UMC31 | SC_RSTCTRL4_NRST_UMC30; |
| writel(tmp, SC_RSTCTRL4); |
| readl(SC_RSTCTRL); /* dummy read */ |
| |
| /* provide clocks */ |
| tmp = readl(SC_CLKCTRL); |
| tmp |= SC_CLKCTRL_CEN_SBC | SC_CLKCTRL_CEN_PERI; |
| writel(tmp, SC_CLKCTRL); |
| tmp = readl(SC_CLKCTRL4); |
| tmp |= SC_CLKCTRL4_CEN_UMCSB | SC_CLKCTRL4_CEN_UMC1 | |
| SC_CLKCTRL4_CEN_UMC0; |
| writel(tmp, SC_CLKCTRL4); |
| readl(SC_CLKCTRL4); /* dummy read */ |
| |
| return 0; |
| } |