include/asm-arm/arch-omap/system.h

   1 /*
   2  * Copied from linux/include/asm-arm/arch-sa1100/system.h
   3  * Copyright (c) 1999 Nicolas Pitre <nico@cam.org>
   4  */
   5 #ifndef __ASM_ARCH_SYSTEM_H
   6 #define __ASM_ARCH_SYSTEM_H
   7 #include <linux/config.h>
   8 #include <asm/mach-types.h>
   9 #include <asm/hardware/clock.h>
  10 #include <asm/hardware.h>
  11 #include <asm/arch/prcm.h>
  12
  13 #ifndef CONFIG_MACH_VOICEBLUE
  14 #define voiceblue_reset()               do {} while (0)
  15 #endif
  16
  17 static inline void arch_idle(void)
  18 {
  19         cpu_do_idle();
  20 }
  21
  22 static inline void omap1_arch_reset(char mode)
  23 {
  24         /*
  25          * Workaround for 5912/1611b bug mentioned in sprz209d.pdf p. 28
  26          * "Global Software Reset Affects Traffic Controller Frequency".
  27          */
  28         if (cpu_is_omap5912()) {
  29                 omap_writew(omap_readw(DPLL_CTL) & ~(1 << 4),
  30                                  DPLL_CTL);
  31                 omap_writew(0x8, ARM_RSTCT1);
  32         }
  33
  34         if (machine_is_voiceblue())
  35                 voiceblue_reset();
  36         else
  37                 omap_writew(1, ARM_RSTCT1);
  38 }
  39
  40 static inline void omap2_arch_reset(char mode)
  41 {
  42         u32 rate;
  43         struct clk *vclk, *sclk;
  44
  45         vclk = clk_get(NULL, "virt_prcm_set");
  46         sclk = clk_get(NULL, "sys_ck");
  47         rate = clk_get_rate(sclk);
  48         clk_set_rate(vclk, rate);       /* go to bypass for OMAP limitation */
  49         RM_RSTCTRL_WKUP |= 2;
  50 }
  51
  52 static inline void arch_reset(char mode)
  53 {
  54         if (!cpu_is_omap24xx())
  55                 omap1_arch_reset(mode);
  56         else
  57                 omap2_arch_reset(mode);
  58 }
  59
  60 #endif