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kernel/linux-imx6_3.14.28/arch/arm/mach-omap2/cm.h 2.05 KB
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  /*
   * OMAP2+ Clock Management prototypes
   *
   * Copyright (C) 2007-2009, 2012 Texas Instruments, Inc.
   * Copyright (C) 2007-2009 Nokia Corporation
   *
   * Written by Paul Walmsley
   *
   * This program is free software; you can redistribute it and/or modify
   * it under the terms of the GNU General Public License version 2 as
   * published by the Free Software Foundation.
   */
  #ifndef __ARCH_ASM_MACH_OMAP2_CM_H
  #define __ARCH_ASM_MACH_OMAP2_CM_H
  
  /*
   * MAX_MODULE_READY_TIME: max duration in microseconds to wait for the
   * PRCM to request that a module exit the inactive state in the case of
   * OMAP2 & 3.
   * In the case of OMAP4 this is the max duration in microseconds for the
   * module to reach the functionnal state from an inactive state.
   */
  #define MAX_MODULE_READY_TIME		2000
  
  # ifndef __ASSEMBLER__
  extern void __iomem *cm_base;
  extern void __iomem *cm2_base;
  extern void omap2_set_globals_cm(void __iomem *cm, void __iomem *cm2);
  # endif
  
  /*
   * MAX_MODULE_DISABLE_TIME: max duration in microseconds to wait for
   * the PRCM to request that a module enter the inactive state in the
   * case of OMAP2 & 3.  In the case of OMAP4 this is the max duration
   * in microseconds for the module to reach the inactive state from
   * a functional state.
   * XXX FSUSB on OMAP4430 takes ~4ms to idle after reset during
   * kernel init.
   */
  #define MAX_MODULE_DISABLE_TIME		5000
  
  # ifndef __ASSEMBLER__
  
  /**
   * struct cm_ll_data - fn ptrs to per-SoC CM function implementations
   * @split_idlest_reg: ptr to the SoC CM-specific split_idlest_reg impl
   * @wait_module_ready: ptr to the SoC CM-specific wait_module_ready impl
   */
  struct cm_ll_data {
  	int (*split_idlest_reg)(void __iomem *idlest_reg, s16 *prcm_inst,
  				u8 *idlest_reg_id);
  	int (*wait_module_ready)(s16 prcm_mod, u8 idlest_id, u8 idlest_shift);
  };
  
  extern int cm_split_idlest_reg(void __iomem *idlest_reg, s16 *prcm_inst,
  			       u8 *idlest_reg_id);
  extern int cm_wait_module_ready(s16 prcm_mod, u8 idlest_id, u8 idlest_shift);
  
  extern int cm_register(struct cm_ll_data *cld);
  extern int cm_unregister(struct cm_ll_data *cld);
  
  # endif
  
  #endif