arch/arm/mach-uniphier/ph1-ld4/clkrst_init.c

   1 /*
   2  * Copyright (C) 2011-2015 Masahiro Yamada <yamada.masahiro@socionext.com>
   3  *
   4  * SPDX-License-Identifier:     GPL-2.0+
   5  */
   6
   7 #include <linux/io.h>
   8 #include <mach/sc-regs.h>
   9
  10 void clkrst_init(void)
  11 {
  12         u32 tmp;
  13
  14         /* deassert reset */
  15         tmp = readl(SC_RSTCTRL);
  16 #ifdef CONFIG_UNIPHIER_ETH
  17         tmp |= SC_RSTCTRL_NRST_ETHER;
  18 #endif
  19 #ifdef CONFIG_USB_EHCI_UNIPHIER
  20         tmp |= SC_RSTCTRL_NRST_STDMAC;
  21 #endif
  22 #ifdef CONFIG_NAND_DENALI
  23         tmp |= SC_RSTCTRL_NRST_NAND;
  24 #endif
  25         writel(tmp, SC_RSTCTRL);
  26         readl(SC_RSTCTRL); /* dummy read */
  27
  28         /* privide clocks */
  29         tmp = readl(SC_CLKCTRL);
  30 #ifdef CONFIG_UNIPHIER_ETH
  31         tmp |= SC_CLKCTRL_CEN_ETHER;
  32 #endif
  33 #ifdef CONFIG_USB_EHCI_UNIPHIER
  34         tmp |= SC_CLKCTRL_CEN_MIO | SC_CLKCTRL_CEN_STDMAC;
  35 #endif
  36 #ifdef CONFIG_NAND_DENALI
  37         tmp |= SC_CLKCTRL_CEN_NAND;
  38 #endif
  39         writel(tmp, SC_CLKCTRL);
  40         readl(SC_CLKCTRL); /* dummy read */
  41 }