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69eb0980ab
MAX8973 supports the voltage output enable/disable through its EN pin. This EN pin can be connected through GPIO from host processor. Add support to provide GPIO number from platform/DT and if it is valid GPIO then enable external control default. Signed-off-by: Laxman Dewangan <ldewangan@nvidia.com> Signed-off-by: Mark Brown <broonie@kernel.org>
77 lines
2.9 KiB
C
77 lines
2.9 KiB
C
/*
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* max8973-regulator.h -- MAXIM 8973 regulator
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*
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* Interface for regulator driver for MAXIM 8973 DC-DC step-down
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* switching regulator.
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*
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* Copyright (C) 2012 NVIDIA Corporation
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* Author: Laxman Dewangan <ldewangan@nvidia.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*
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*/
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#ifndef __LINUX_REGULATOR_MAX8973_H
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#define __LINUX_REGULATOR_MAX8973_H
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/*
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* Control flags for configuration of the device.
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* Client need to pass this information with ORed
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*/
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#define MAX8973_CONTROL_REMOTE_SENSE_ENABLE 0x00000001
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#define MAX8973_CONTROL_FALLING_SLEW_RATE_ENABLE 0x00000002
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#define MAX8973_CONTROL_OUTPUT_ACTIVE_DISCH_ENABLE 0x00000004
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#define MAX8973_CONTROL_BIAS_ENABLE 0x00000008
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#define MAX8973_CONTROL_PULL_DOWN_ENABLE 0x00000010
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#define MAX8973_CONTROL_FREQ_SHIFT_9PER_ENABLE 0x00000020
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#define MAX8973_CONTROL_CLKADV_TRIP_DISABLED 0x00000000
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#define MAX8973_CONTROL_CLKADV_TRIP_75mV_PER_US 0x00010000
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#define MAX8973_CONTROL_CLKADV_TRIP_150mV_PER_US 0x00020000
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#define MAX8973_CONTROL_CLKADV_TRIP_75mV_PER_US_HIST_DIS 0x00030000
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#define MAX8973_CONTROL_INDUCTOR_VALUE_NOMINAL 0x00000000
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#define MAX8973_CONTROL_INDUCTOR_VALUE_MINUS_30_PER 0x00100000
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#define MAX8973_CONTROL_INDUCTOR_VALUE_PLUS_30_PER 0x00200000
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#define MAX8973_CONTROL_INDUCTOR_VALUE_PLUS_60_PER 0x00300000
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/*
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* struct max8973_regulator_platform_data - max8973 regulator platform data.
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*
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* @reg_init_data: The regulator init data.
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* @control_flags: Control flags which are ORed value of above flags to
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* configure device.
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* @enable_ext_control: Enable the voltage enable/disable through external
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* control signal from EN input pin. If it is false then
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* voltage output will be enabled/disabled through EN bit of
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* device register.
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* @enable_gpio: Enable GPIO. If EN pin is controlled through GPIO from host
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* then GPIO number can be provided. If no GPIO controlled then
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* it should be -1.
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* @dvs_gpio: GPIO for dvs. It should be -1 if this is tied with fixed logic.
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* @dvs_def_state: Default state of dvs. 1 if it is high else 0.
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*/
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struct max8973_regulator_platform_data {
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struct regulator_init_data *reg_init_data;
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unsigned long control_flags;
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bool enable_ext_control;
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int enable_gpio;
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int dvs_gpio;
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unsigned dvs_def_state:1;
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};
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#endif /* __LINUX_REGULATOR_MAX8973_H */
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