arch/arm/mach-uniphier/ph1-pro4/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_USB_XHCI_UNIPHIER
  17         tmp |= SC_RSTCTRL_NRST_USB3B0 | SC_RSTCTRL_NRST_USB3C0 |
  18                 SC_RSTCTRL_NRST_GIO;
  19 #endif
  20 #ifdef CONFIG_UNIPHIER_ETH
  21         tmp |= SC_RSTCTRL_NRST_ETHER;
  22 #endif
  23 #ifdef CONFIG_USB_EHCI_UNIPHIER
  24         tmp |= SC_RSTCTRL_NRST_STDMAC;
  25 #endif
  26 #ifdef CONFIG_NAND_DENALI
  27         tmp |= SC_RSTCTRL_NRST_NAND;
  28 #endif
  29         writel(tmp, SC_RSTCTRL);
  30         readl(SC_RSTCTRL); /* dummy read */
  31
  32 #ifdef CONFIG_USB_XHCI_UNIPHIER
  33         tmp = readl(SC_RSTCTRL2);
  34         tmp |= SC_RSTCTRL2_NRST_USB3B1 | SC_RSTCTRL2_NRST_USB3C1;
  35         writel(tmp, SC_RSTCTRL2);
  36         readl(SC_RSTCTRL2); /* dummy read */
  37 #endif
  38
  39         /* privide clocks */
  40         tmp = readl(SC_CLKCTRL);
  41 #ifdef CONFIG_USB_XHCI_UNIPHIER
  42         tmp |= SC_CLKCTRL_CEN_USB31 | SC_CLKCTRL_CEN_USB30 |
  43                 SC_CLKCTRL_CEN_GIO;
  44 #endif
  45 #ifdef CONFIG_UNIPHIER_ETH
  46         tmp |= SC_CLKCTRL_CEN_ETHER;
  47 #endif
  48 #ifdef CONFIG_USB_EHCI_UNIPHIER
  49         tmp |= SC_CLKCTRL_CEN_MIO | SC_CLKCTRL_CEN_STDMAC;
  50 #endif
  51 #ifdef CONFIG_NAND_DENALI
  52         tmp |= SC_CLKCTRL_CEN_NAND;
  53 #endif
  54         writel(tmp, SC_CLKCTRL);
  55         readl(SC_CLKCTRL); /* dummy read */
  56 }