arch/arm/mach-uniphier/clk/clk-proxstream2.c

   1 /*
   2  * Copyright (C) 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/init.h>
   9 #include <mach/sc-regs.h>
  10
  11 void proxstream2_clk_init(void)
  12 {
  13         u32 tmp;
  14
  15         /* deassert reset */
  16         tmp = readl(SC_RSTCTRL);
  17 #ifdef CONFIG_USB_XHCI_UNIPHIER
  18         tmp |= SC_RSTCTRL_NRST_USB3B0 | SC_RSTCTRL_NRST_GIO;
  19 #endif
  20 #ifdef CONFIG_UNIPHIER_ETH
  21         tmp |= SC_RSTCTRL_NRST_ETHER;
  22 #endif
  23 #ifdef CONFIG_NAND_DENALI
  24         tmp |= SC_RSTCTRL_NRST_NAND;
  25 #endif
  26         writel(tmp, SC_RSTCTRL);
  27         readl(SC_RSTCTRL); /* dummy read */
  28
  29 #ifdef CONFIG_USB_XHCI_UNIPHIER
  30         tmp = readl(SC_RSTCTRL2);
  31         tmp |= SC_RSTCTRL2_NRST_USB3B1;
  32         writel(tmp, SC_RSTCTRL2);
  33         readl(SC_RSTCTRL2); /* dummy read */
  34 #endif
  35
  36         /* privide clocks */
  37         tmp = readl(SC_CLKCTRL);
  38 #ifdef CONFIG_USB_XHCI_UNIPHIER
  39         tmp |= SC_CLKCTRL_CEN_USB31 | SC_CLKCTRL_CEN_USB30 |
  40                 SC_CLKCTRL_CEN_GIO;
  41 #endif
  42 #ifdef CONFIG_UNIPHIER_ETH
  43         tmp |= SC_CLKCTRL_CEN_ETHER;
  44 #endif
  45 #ifdef CONFIG_NAND_DENALI
  46         tmp |= SC_CLKCTRL_CEN_NAND;
  47 #endif
  48         writel(tmp, SC_CLKCTRL);
  49         readl(SC_CLKCTRL); /* dummy read */
  50 }