arch/arm/mach-uniphier/clk/clk-pro4.c

   1 /*
   2  * Copyright (C) 2011-2015 Panasonic Corporation
   3  * Copyright (C) 2015-2016 Socionext Inc.
   4  *   Author: Masahiro Yamada <yamada.masahiro@socionext.com>
   5  *
   6  * SPDX-License-Identifier:     GPL-2.0+
   7  */
   8
   9 #include <linux/io.h>
  10
  11 #include "../init.h"
  12 #include "../sc-regs.h"
  13
  14 void uniphier_pro4_clk_init(void)
  15 {
  16         u32 tmp;
  17
  18         /* deassert reset */
  19         tmp = readl(SC_RSTCTRL);
  20 #ifdef CONFIG_USB_DWC3_UNIPHIER
  21         tmp |= SC_RSTCTRL_NRST_USB3B0 | SC_RSTCTRL_NRST_USB3C0 |
  22                 SC_RSTCTRL_NRST_GIO;
  23 #endif
  24 #ifdef CONFIG_UNIPHIER_ETH
  25         tmp |= SC_RSTCTRL_NRST_ETHER;
  26 #endif
  27 #ifdef CONFIG_NAND_DENALI
  28         tmp |= SC_RSTCTRL_NRST_NAND;
  29 #endif
  30         writel(tmp, SC_RSTCTRL);
  31         readl(SC_RSTCTRL); /* dummy read */
  32
  33 #ifdef CONFIG_USB_DWC3_UNIPHIER
  34         tmp = readl(SC_RSTCTRL2);
  35         tmp |= SC_RSTCTRL2_NRST_USB3B1 | SC_RSTCTRL2_NRST_USB3C1;
  36         writel(tmp, SC_RSTCTRL2);
  37         readl(SC_RSTCTRL2); /* dummy read */
  38 #endif
  39
  40         /* provide clocks */
  41         tmp = readl(SC_CLKCTRL);
  42 #ifdef CONFIG_USB_DWC3_UNIPHIER
  43         tmp |= SC_CLKCTRL_CEN_USB31 | SC_CLKCTRL_CEN_USB30 |
  44                 SC_CLKCTRL_CEN_GIO;
  45 #endif
  46 #ifdef CONFIG_UNIPHIER_ETH
  47         tmp |= SC_CLKCTRL_CEN_ETHER;
  48 #endif
  49 #ifdef CONFIG_USB_EHCI_HCD
  50         tmp |= SC_CLKCTRL_CEN_MIO | SC_CLKCTRL_CEN_STDMAC;
  51 #endif
  52 #ifdef CONFIG_NAND_DENALI
  53         tmp |= SC_CLKCTRL_CEN_NAND;
  54 #endif
  55         writel(tmp, SC_CLKCTRL);
  56         readl(SC_CLKCTRL); /* dummy read */
  57 }