arch/arm/mach-uniphier/clk/clk-pro4.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
   9 #include "../init.h"
  10 #include "../sc-regs.h"
  11
  12 void uniphier_pro4_clk_init(void)
  13 {
  14         u32 tmp;
  15
  16         /* deassert reset */
  17         tmp = readl(SC_RSTCTRL);
  18 #ifdef CONFIG_USB_XHCI_UNIPHIER
  19         tmp |= SC_RSTCTRL_NRST_USB3B0 | SC_RSTCTRL_NRST_USB3C0 |
  20                 SC_RSTCTRL_NRST_GIO;
  21 #endif
  22 #ifdef CONFIG_UNIPHIER_ETH
  23         tmp |= SC_RSTCTRL_NRST_ETHER;
  24 #endif
  25 #ifdef CONFIG_USB_EHCI
  26         tmp |= SC_RSTCTRL_NRST_STDMAC;
  27 #endif
  28 #ifdef CONFIG_NAND_DENALI
  29         tmp |= SC_RSTCTRL_NRST_NAND;
  30 #endif
  31         writel(tmp, SC_RSTCTRL);
  32         readl(SC_RSTCTRL); /* dummy read */
  33
  34 #ifdef CONFIG_USB_XHCI_UNIPHIER
  35         tmp = readl(SC_RSTCTRL2);
  36         tmp |= SC_RSTCTRL2_NRST_USB3B1 | SC_RSTCTRL2_NRST_USB3C1;
  37         writel(tmp, SC_RSTCTRL2);
  38         readl(SC_RSTCTRL2); /* dummy read */
  39 #endif
  40
  41         /* provide clocks */
  42         tmp = readl(SC_CLKCTRL);
  43 #ifdef CONFIG_USB_XHCI_UNIPHIER
  44         tmp |= SC_CLKCTRL_CEN_USB31 | SC_CLKCTRL_CEN_USB30 |
  45                 SC_CLKCTRL_CEN_GIO;
  46 #endif
  47 #ifdef CONFIG_UNIPHIER_ETH
  48         tmp |= SC_CLKCTRL_CEN_ETHER;
  49 #endif
  50 #ifdef CONFIG_USB_EHCI
  51         tmp |= SC_CLKCTRL_CEN_MIO | SC_CLKCTRL_CEN_STDMAC;
  52 #endif
  53 #ifdef CONFIG_NAND_DENALI
  54         tmp |= SC_CLKCTRL_CEN_NAND;
  55 #endif
  56         writel(tmp, SC_CLKCTRL);
  57         readl(SC_CLKCTRL); /* dummy read */
  58 }