arch/arm/mach-uniphier/clk/clk-ld11.c

   1 /*
   2  * Copyright (C) 2016 Socionext Inc.
   3  *
   4  * SPDX-License-Identifier:     GPL-2.0+
   5  */
   6
   7 #include <common.h>
   8 #include <spl.h>
   9 #include <linux/bitops.h>
  10 #include <linux/io.h>
  11
  12 #include "../boot-mode/boot-device.h"
  13 #include "../init.h"
  14 #include "../sc64-regs.h"
  15 #include "../sg-regs.h"
  16
  17 void uniphier_ld11_clk_init(void)
  18 {
  19         /* if booted from a device other than USB, without stand-by MPU */
  20         if ((readl(SG_PINMON0) & BIT(27)) &&
  21             spl_boot_device_raw() != BOOT_DEVICE_USB) {
  22                 writel(1, SG_ETPHYPSHUT);
  23                 writel(1, SG_ETPHYCNT);
  24
  25                 udelay(1); /* wait for regulator level 1.1V -> 2.5V */
  26
  27                 writel(3, SG_ETPHYCNT);
  28                 writel(3, SG_ETPHYPSHUT);
  29                 writel(7, SG_ETPHYCNT);
  30         }
  31
  32 #ifdef CONFIG_USB_EHCI
  33         {
  34                 /* FIXME: the current clk driver can not handle parents */
  35                 u32 tmp;
  36                 tmp = readl(SC_CLKCTRL4);
  37                 tmp |= SC_CLKCTRL4_MIO | SC_CLKCTRL4_STDMAC;
  38                 writel(tmp, SC_CLKCTRL4);
  39         }
  40 #endif
  41 }