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kernel/linux-rt-4.4.41/arch/arm/plat-orion/include/plat/mpp.h 1.07 KB
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  /*
   * arch/arm/plat-orion/include/plat/mpp.h
   *
   * Marvell Orion SoC MPP handling.
   *
   * This file is licensed under the terms of the GNU General Public
   * License version 2.  This program is licensed "as is" without any
   * warranty of any kind, whether express or implied.
   */
  
  #ifndef __PLAT_MPP_H
  #define __PLAT_MPP_H
  
  #define MPP_NUM(x)	((x) & 0xff)
  #define MPP_SEL(x)	(((x) >> 8) & 0xf)
  
  /* This is the generic MPP macro, without any variant information.
     Each machine architecture is expected to extend this with further
     bit fields indicating which MPP configurations are valid for a
     specific variant. */
  
  #define GENERIC_MPP(_num, _sel, _in, _out) ( \
  	/* MPP number */		((_num) & 0xff) | \
  	/* MPP select value */		(((_sel) & 0xf) << 8) | \
  	/* may be input signal */	((!!(_in)) << 12) | \
  	/* may be output signal */	((!!(_out)) << 13))
  
  #define MPP_INPUT_MASK		GENERIC_MPP(0, 0x0, 1, 0)
  #define MPP_OUTPUT_MASK		GENERIC_MPP(0, 0x0, 0, 1)
  
  void __init orion_mpp_conf(unsigned int *mpp_list, unsigned int variant_mask,
  			   unsigned int mpp_max, void __iomem *dev_bus);
  
  #endif