arch/arm/mach-uniphier/ph1-pro4/clkrst_init.c

   1 /*
   2  * Copyright (C) 2011-2015 Panasonic Corporation
   3  *   Author: Masahiro Yamada <yamada.m@jp.panasonic.com>
   4  *
   5  * SPDX-License-Identifier:     GPL-2.0+
   6  */
   7
   8 #include <asm/io.h>
   9 #include <mach/sc-regs.h>
  10
  11 void clkrst_init(void)
  12 {
  13         u32 tmp;
  14
  15         /* deassert reset */
  16         tmp = readl(SC_RSTCTRL);
  17 #ifdef CONFIG_UNIPHIER_ETH
  18         tmp |= SC_RSTCTRL_NRST_ETHER;
  19 #endif
  20 #ifdef CONFIG_NAND_DENALI
  21         tmp |= SC_RSTCTRL_NRST_NAND;
  22 #endif
  23         writel(tmp, SC_RSTCTRL);
  24         readl(SC_RSTCTRL); /* dummy read */
  25
  26         /* privide clocks */
  27         tmp = readl(SC_CLKCTRL);
  28 #ifdef CONFIG_UNIPHIER_ETH
  29         tmp |= SC_CLKCTRL_CEN_ETHER;
  30 #endif
  31 #ifdef CONFIG_USB_EHCI_UNIPHIER
  32         tmp |= SC_CLKCTRL_CEN_MIO;
  33 #endif
  34 #ifdef CONFIG_NAND_DENALI
  35         tmp |= SC_CLKCTRL_CEN_NAND;
  36 #endif
  37         writel(tmp, SC_CLKCTRL);
  38         readl(SC_CLKCTRL); /* dummy read */
  39 }