include/linux/pmbus.h

   1 /* SPDX-License-Identifier: GPL-2.0-or-later */
   2 /*
   3  * Hardware monitoring driver for PMBus devices
   4  *
   5  * Copyright (c) 2010, 2011 Ericsson AB.
   6  */
   7
   8 #ifndef _PMBUS_H_
   9 #define _PMBUS_H_
  10
  11 #include <linux/bits.h>
  12
  13 /* flags */
  14
  15 /*
  16  * PMBUS_SKIP_STATUS_CHECK
  17  *
  18  * During register detection, skip checking the status register for
  19  * communication or command errors.
  20  *
  21  * Some PMBus chips respond with valid data when trying to read an unsupported
  22  * register. For such chips, checking the status register is mandatory when
  23  * trying to determine if a chip register exists or not.
  24  * Other PMBus chips don't support the STATUS_CML register, or report
  25  * communication errors for no explicable reason. For such chips, checking
  26  * the status register must be disabled.
  27  */
  28 #define PMBUS_SKIP_STATUS_CHECK BIT(0)
  29
  30 /*
  31  * PMBUS_WRITE_PROTECTED
  32  * Set if the chip is write protected and write protection is not determined
  33  * by the standard WRITE_PROTECT command.
  34  */
  35 #define PMBUS_WRITE_PROTECTED   BIT(1)
  36
  37 /*
  38  * PMBUS_NO_CAPABILITY
  39  *
  40  * Some PMBus chips don't respond with valid data when reading the CAPABILITY
  41  * register. For such chips, this flag should be set so that the PMBus core
  42  * driver doesn't use CAPABILITY to determine it's behavior.
  43  */
  44 #define PMBUS_NO_CAPABILITY                     BIT(2)
  45
  46 struct pmbus_platform_data {
  47         u32 flags;              /* Device specific flags */
  48
  49         /* regulator support */
  50         int num_regulators;
  51         struct regulator_init_data *reg_init_data;
  52 };
  53
  54 #endif /* _PMBUS_H_ */