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e5befc024c
Some PMBus chips don't respond with valid data when reading the CAPABILITY register. Add a flag that device drivers can set so that the PMBus core driver doesn't use CAPABILITY to determine it's behavior. Signed-off-by: Eddie James <eajames@linux.ibm.com> Link: https://lore.kernel.org/r/20201222152640.27749-2-eajames@linux.ibm.com Signed-off-by: Guenter Roeck <linux@roeck-us.net>
54 lines
1.4 KiB
C
54 lines
1.4 KiB
C
/* SPDX-License-Identifier: GPL-2.0-or-later */
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/*
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* Hardware monitoring driver for PMBus devices
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*
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* Copyright (c) 2010, 2011 Ericsson AB.
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*/
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#ifndef _PMBUS_H_
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#define _PMBUS_H_
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#include <linux/bits.h>
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/* flags */
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/*
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* PMBUS_SKIP_STATUS_CHECK
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*
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* During register detection, skip checking the status register for
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* communication or command errors.
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*
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* Some PMBus chips respond with valid data when trying to read an unsupported
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* register. For such chips, checking the status register is mandatory when
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* trying to determine if a chip register exists or not.
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* Other PMBus chips don't support the STATUS_CML register, or report
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* communication errors for no explicable reason. For such chips, checking
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* the status register must be disabled.
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*/
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#define PMBUS_SKIP_STATUS_CHECK BIT(0)
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/*
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* PMBUS_WRITE_PROTECTED
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* Set if the chip is write protected and write protection is not determined
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* by the standard WRITE_PROTECT command.
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*/
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#define PMBUS_WRITE_PROTECTED BIT(1)
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/*
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* PMBUS_NO_CAPABILITY
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*
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* Some PMBus chips don't respond with valid data when reading the CAPABILITY
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* register. For such chips, this flag should be set so that the PMBus core
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* driver doesn't use CAPABILITY to determine it's behavior.
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*/
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#define PMBUS_NO_CAPABILITY BIT(2)
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struct pmbus_platform_data {
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u32 flags; /* Device specific flags */
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/* regulator support */
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int num_regulators;
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struct regulator_init_data *reg_init_data;
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};
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#endif /* _PMBUS_H_ */
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