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_ */ 55