git.sur5r.net Git - u-boot/blob - arch/arm/mach-uniphier/clk/clk-ld4.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_ld4_clk_init(void)
  14 {
  15         u32 tmp;
  16
  17         /* deassert reset */
  18         tmp = readl(SC_RSTCTRL);
  19 #ifdef CONFIG_NAND_DENALI
  20         tmp |= SC_RSTCTRL_NRST_NAND;
  21 #endif
  22         writel(tmp, SC_RSTCTRL);
  23         readl(SC_RSTCTRL); /* dummy read */
  24
  25         /* provide clocks */
  26         tmp = readl(SC_CLKCTRL);
  27 #ifdef CONFIG_USB_EHCI_HCD
  28         tmp |= SC_CLKCTRL_CEN_MIO | SC_CLKCTRL_CEN_STDMAC;
  29 #endif
  30 #ifdef CONFIG_NAND_DENALI
  31         tmp |= SC_CLKCTRL_CEN_NAND;
  32 #endif
  33         writel(tmp, SC_CLKCTRL);
  34         readl(SC_CLKCTRL); /* dummy read */
  35 }