arch/arm/mach-uniphier/early-clk/early-clk-ld20.c

   1 /*
   2  * Copyright (C) 2016 Masahiro Yamada <yamada.masahiro@socionext.com>
   3  *
   4  * SPDX-License-Identifier:     GPL-2.0+
   5  */
   6
   7 #include <linux/io.h>
   8
   9 #include "../init.h"
  10 #include "../sc64-regs.h"
  11
  12 int uniphier_ld20_early_clk_init(const struct uniphier_board_data *bd)
  13 {
  14         u32 tmp;
  15
  16         /* deassert reset */
  17         tmp = readl(SC_RSTCTRL7);
  18         tmp |= SC_RSTCTRL7_UMCSB | SC_RSTCTRL7_UMCA2 | SC_RSTCTRL7_UMCA1 |
  19                 SC_RSTCTRL7_UMCA0 | SC_RSTCTRL7_UMC32 | SC_RSTCTRL7_UMC31 |
  20                 SC_RSTCTRL7_UMC30;
  21         writel(tmp, SC_RSTCTRL7);
  22
  23         /* provide clocks */
  24         tmp = readl(SC_CLKCTRL7);
  25         tmp |= SC_CLKCTRL7_UMCSB | SC_CLKCTRL7_UMC32 | SC_CLKCTRL7_UMC31 |
  26                                                         SC_CLKCTRL7_UMC30;
  27         writel(tmp, SC_CLKCTRL7);
  28
  29         return 0;
  30 }