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