git.sur5r.net Git - u-boot/blob - arch/arm/mach-uniphier/clk/clk-ph1-ld4.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/init.h>
   9 #include <mach/sc-regs.h>
  10
  11 void ph1_ld4_clk_init(void)
  12 {
  13         u32 tmp;
  14
  15         /* deassert reset */
  16         tmp = readl(SC_RSTCTRL);
  17 #ifdef CONFIG_UNIPHIER_ETH
  18         tmp |= SC_RSTCTRL_NRST_ETHER;
  19 #endif
  20 #ifdef CONFIG_USB_EHCI_UNIPHIER
  21         tmp |= SC_RSTCTRL_NRST_STDMAC;
  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         /* privide clocks */
  30         tmp = readl(SC_CLKCTRL);
  31 #ifdef CONFIG_UNIPHIER_ETH
  32         tmp |= SC_CLKCTRL_CEN_ETHER;
  33 #endif
  34 #ifdef CONFIG_USB_EHCI_UNIPHIER
  35         tmp |= SC_CLKCTRL_CEN_MIO | SC_CLKCTRL_CEN_STDMAC;
  36 #endif
  37 #ifdef CONFIG_NAND_DENALI
  38         tmp |= SC_CLKCTRL_CEN_NAND;
  39 #endif
  40         writel(tmp, SC_CLKCTRL);
  41         readl(SC_CLKCTRL); /* dummy read */
  42 }