git.sur5r.net Git - u-boot/blob - arch/arm/mach-uniphier/clk/clk-ld4.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_ld4_clk_init(void)
  15 {
  16         u32 tmp;
  17
  18         /* deassert reset */
  19         tmp = readl(SC_RSTCTRL);
  20 #ifdef CONFIG_NAND_DENALI
  21         tmp |= SC_RSTCTRL_NRST_NAND;
  22 #endif
  23         writel(tmp, SC_RSTCTRL);
  24         readl(SC_RSTCTRL); /* dummy read */
  25
  26         /* provide clocks */
  27         tmp = readl(SC_CLKCTRL);
  28 #ifdef CONFIG_USB_EHCI_HCD
  29         tmp |= SC_CLKCTRL_CEN_MIO | SC_CLKCTRL_CEN_STDMAC;
  30 #endif
  31 #ifdef CONFIG_NAND_DENALI
  32         tmp |= SC_CLKCTRL_CEN_NAND;
  33 #endif
  34         writel(tmp, SC_CLKCTRL);
  35         readl(SC_CLKCTRL); /* dummy read */
  36 }