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

   1 // SPDX-License-Identifier: GPL-2.0+
   2 /*
   3  * Copyright (C) 2011-2015 Panasonic Corporation
   4  * Copyright (C) 2015-2016 Socionext Inc.
   5  *   Author: Masahiro Yamada <yamada.masahiro@socionext.com>
   6  */
   7
   8 #include <linux/io.h>
   9
  10 #include "../init.h"
  11 #include "../sc-regs.h"
  12
  13 void uniphier_pro4_clk_init(void)
  14 {
  15         u32 tmp;
  16
  17         /* deassert reset */
  18         tmp = readl(SC_RSTCTRL);
  19 #ifdef CONFIG_USB_DWC3_UNIPHIER
  20         tmp |= SC_RSTCTRL_NRST_USB3B0 | SC_RSTCTRL_NRST_USB3C0 |
  21                 SC_RSTCTRL_NRST_GIO;
  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_DWC3_UNIPHIER
  30         tmp = readl(SC_RSTCTRL2);
  31         tmp |= SC_RSTCTRL2_NRST_USB3B1 | SC_RSTCTRL2_NRST_USB3C1;
  32         writel(tmp, SC_RSTCTRL2);
  33         readl(SC_RSTCTRL2); /* dummy read */
  34 #endif
  35
  36         /* provide clocks */
  37         tmp = readl(SC_CLKCTRL);
  38 #ifdef CONFIG_USB_DWC3_UNIPHIER
  39         tmp |= SC_CLKCTRL_CEN_USB31 | SC_CLKCTRL_CEN_USB30 |
  40                 SC_CLKCTRL_CEN_GIO;
  41 #endif
  42 #ifdef CONFIG_USB_EHCI_HCD
  43         tmp |= SC_CLKCTRL_CEN_MIO | SC_CLKCTRL_CEN_STDMAC;
  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 }