include/linux/i2c/pmbus.h

   1 /*
   2  * Hardware monitoring driver for PMBus devices
   3  *
   4  * Copyright (c) 2010, 2011 Ericsson AB.
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation; either version 2 of the License, or
   9  * (at your option) any later version.
  10  *
  11  * This program is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  14  * GNU General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * along with this program; if not, write to the Free Software
  18  * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  19  */
  20
  21 #ifndef _PMBUS_H_
  22 #define _PMBUS_H_
  23
  24 /* flags */
  25
  26 /*
  27  * PMBUS_SKIP_STATUS_CHECK
  28  *
  29  * During register detection, skip checking the status register for
  30  * communication or command errors.
  31  *
  32  * Some PMBus chips respond with valid data when trying to read an unsupported
  33  * register. For such chips, checking the status register is mandatory when
  34  * trying to determine if a chip register exists or not.
  35  * Other PMBus chips don't support the STATUS_CML register, or report
  36  * communication errors for no explicable reason. For such chips, checking
  37  * the status register must be disabled.
  38  */
  39 #define PMBUS_SKIP_STATUS_CHECK (1 << 0)
  40
  41 struct pmbus_platform_data {
  42         u32 flags;              /* Device specific flags */
  43 };
  44
  45 #endif /* _PMBUS_H_ */