LXR linux/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
  37struct pmbus_platform_data {
  38        u32 flags;              /* Device specific flags */
  39
  40        /* regulator support */
  41        int num_regulators;
  42        struct regulator_init_data *reg_init_data;
  43};
  44
  45#endif /* _PMBUS_H_ */
  46