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kernel/linux-rt-4.4.41/arch/arm/boot/dts/st-pincfg.h 1.62 KB
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  #ifndef _ST_PINCFG_H_
  #define _ST_PINCFG_H_
  
  /* Alternate functions */
  #define ALT1	1
  #define ALT2	2
  #define ALT3	3
  #define ALT4	4
  #define ALT5	5
  #define ALT6	6
  #define ALT7	7
  
  /* Output enable */
  #define OE			(1 << 27)
  /* Pull Up */
  #define PU			(1 << 26)
  /* Open Drain */
  #define OD			(1 << 25)
  #define RT			(1 << 23)
  #define INVERTCLK		(1 << 22)
  #define CLKNOTDATA		(1 << 21)
  #define DOUBLE_EDGE		(1 << 20)
  #define CLK_A			(0 << 18)
  #define CLK_B			(1 << 18)
  #define CLK_C			(2 << 18)
  #define CLK_D			(3 << 18)
  
  /* User-frendly defines for Pin Direction */
  		/* oe = 0, pu = 0, od = 0 */
  #define IN			(0)
  		/* oe = 0, pu = 1, od = 0 */
  #define IN_PU			(PU)
  		/* oe = 1, pu = 0, od = 0 */
  #define OUT			(OE)
  		/* oe = 1, pu = 0, od = 1 */
  #define BIDIR			(OE | OD)
  		/* oe = 1, pu = 1, od = 1 */
  #define BIDIR_PU		(OE | PU | OD)
  
  /* RETIME_TYPE */
  /*
   * B Mode
   * Bypass retime with optional delay parameter
   */
  #define BYPASS		(0)
  /*
   * R0, R1, R0D, R1D modes
   * single-edge data non inverted clock, retime data with clk
   */
  #define SE_NICLK_IO	(RT)
  /*
   * RIV0, RIV1, RIV0D, RIV1D modes
   * single-edge data inverted clock, retime data with clk
   */
  #define SE_ICLK_IO	(RT | INVERTCLK)
  /*
   * R0E, R1E, R0ED, R1ED modes
   * double-edge data, retime data with clk
   */
  #define DE_IO		(RT | DOUBLE_EDGE)
  /*
   * CIV0, CIV1 modes with inverted clock
   * Retiming the clk pins will park clock & reduce the noise within the core.
   */
  #define ICLK		(RT | CLKNOTDATA | INVERTCLK)
  /*
   * CLK0, CLK1 modes with non-inverted clock
   * Retiming the clk pins will park clock & reduce the noise within the core.
   */
  #define NICLK		(RT | CLKNOTDATA)
  #endif /* _ST_PINCFG_H_ */