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/* SPDX-License-Identifier: GPL-2.0-or-later */
/*
* Hardware monitoring driver for PMBus devices
*
* Copyright (c) 2010, 2011 Ericsson AB.
*/
#ifndef _PMBUS_H_
#define _PMBUS_H_
#include <linux/bits.h>
/* flags */
/*
* PMBUS_SKIP_STATUS_CHECK
*
* During register detection, skip checking the status register for
* communication or command errors.
*
* Some PMBus chips respond with valid data when trying to read an unsupported
* register. For such chips, checking the status register is mandatory when
* trying to determine if a chip register exists or not.
* Other PMBus chips don't support the STATUS_CML register, or report
* communication errors for no explicable reason. For such chips, checking
* the status register must be disabled.
*/
#define PMBUS_SKIP_STATUS_CHECK BIT(0)
/*
* PMBUS_WRITE_PROTECTED
* Set if the chip is write protected and write protection is not determined
* by the standard WRITE_PROTECT command.
*/
#define PMBUS_WRITE_PROTECTED BIT(1)
/*
* PMBUS_NO_CAPABILITY
*
* Some PMBus chips don't respond with valid data when reading the CAPABILITY
* register. For such chips, this flag should be set so that the PMBus core
* driver doesn't use CAPABILITY to determine it's behavior.
*/
#define PMBUS_NO_CAPABILITY BIT(2)
/*
* PMBUS_READ_STATUS_AFTER_FAILED_CHECK
*
* Some PMBus chips end up in an undefined state when trying to read an
* unsupported register. For such chips, it is necessary to reset the
* chip pmbus controller to a known state after a failed register check.
* This can be done by reading a known register. By setting this flag the
* driver will try to read the STATUS register after each failed
* register check. This read may fail, but it will put the chip in a
* known state.
*/
#define PMBUS_READ_STATUS_AFTER_FAILED_CHECK BIT(3)
/*
* PMBUS_NO_WRITE_PROTECT
*
* Some PMBus chips respond with invalid data when reading the WRITE_PROTECT
* register. For such chips, this flag should be set so that the PMBus core
* driver doesn't use the WRITE_PROTECT command to determine its behavior.
*/
#define PMBUS_NO_WRITE_PROTECT BIT(4)
/*
* PMBUS_USE_COEFFICIENTS_CMD
*
* When this flag is set the PMBus core driver will use the COEFFICIENTS
* register to initialize the coefficients for the direct mode format.
*/
#define PMBUS_USE_COEFFICIENTS_CMD BIT(5)
struct pmbus_platform_data {
u32 flags; /* Device specific flags */
/* regulator support */
int num_regulators;
struct regulator_init_data *reg_init_data;
};
#endif /* _PMBUS_H_ */
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