include/asm-arm/arch-l7200/pmpcon.h

   1 /****************************************************************************/
   2 /*
   3  *  linux/include/asm-arm/arch-l7200/pmpcon.h
   4  *
   5  *   Registers and  helper functions for the L7200 Link-Up Systems
   6  *   DC/DC converter register.
   7  *
   8  *   (C) Copyright 2000, S A McConnell  (samcconn@cotw.com)
   9  *
  10  *  This file is subject to the terms and conditions of the GNU General Public
  11  *  License. See the file COPYING in the main directory of this archive for
  12  *  more details.
  13  */
  14
  15 /****************************************************************************/
  16
  17 #define PMPCON_OFF 0x00006000  /* Offset from IO_START_2. */
  18
  19 /* IO_START_2 and IO_BASE_2 are defined in hardware.h */
  20
  21 #define PMPCON_START (IO_START_2 + PMPCON_OFF)  /* Physical address of reg. */
  22 #define PMPCON_BASE  (IO_BASE_2  + PMPCON_OFF)  /* Virtual address of reg. */
  23
  24
  25 #define PMPCON (*(volatile unsigned int *)(PMPCON_BASE))
  26
  27 #define PWM2_50CYCLE 0x800
  28 #define CONTRAST     0x9
  29
  30 #define PWM1H (CONTRAST)
  31 #define PWM1L (CONTRAST << 4)
  32
  33 #define PMPCON_VALUE  (PWM2_50CYCLE | PWM1L | PWM1H)
  34
  35 /* PMPCON = 0x811;   // too light and fuzzy
  36  * PMPCON = 0x844;
  37  * PMPCON = 0x866;   // better color poor depth
  38  * PMPCON = 0x888;   // Darker but better depth
  39  * PMPCON = 0x899;   // Darker even better depth
  40  * PMPCON = 0x8aa;   // too dark even better depth
  41  * PMPCON = 0X8cc;   // Way too dark
  42  */
  43
  44 /* As CONTRAST value increases the greater the depth perception and
  45  * the darker the colors.
  46  */