0c19fa8e52
Add the ability to selectively enable over current protection (OCP) for LVS and MVS type PMIC voltage switches. OCP is used to automatically disable the output of a PMIC switch in hardware when the load on the switch becomes too large. The sequence used when enabling a switch when OCP is desired is as follows: 1. Disable OCP. 2. Enable the switch. 3. Wait for ocp_enable_time microseconds. 4. Enable OCP. This sequence is used to ensure that sufficient time is allowed for inrush current to subside so that a false OCP event is not triggered. The delay time is board specific. Change-Id: I0ea73d3bddd3280ff25f232ece0f1175a52d36cc Signed-off-by: David Collins <collinsd@codeaurora.org>
88 lines
3.2 KiB
C
88 lines
3.2 KiB
C
/* Copyright (c) 2011-2012, Code Aurora Forum. All rights reserved.
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License version 2 and
|
|
* only version 2 as published by the Free Software Foundation.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*/
|
|
|
|
#ifndef __REGULATOR_PM8XXX_REGULATOR_H__
|
|
#define __REGULATOR_PM8XXX_REGULATOR_H__
|
|
|
|
#include <linux/regulator/machine.h>
|
|
|
|
#define PM8XXX_REGULATOR_DEV_NAME "pm8xxx-regulator"
|
|
|
|
/* Pin control input pins. */
|
|
#define PM8XXX_VREG_PIN_CTRL_NONE 0x00
|
|
#define PM8XXX_VREG_PIN_CTRL_EN0 0x01
|
|
#define PM8XXX_VREG_PIN_CTRL_EN1 0x02
|
|
#define PM8XXX_VREG_PIN_CTRL_EN2 0x04
|
|
#define PM8XXX_VREG_PIN_CTRL_EN3 0x08
|
|
#define PM8XXX_VREG_PIN_CTRL_ALL 0x0F
|
|
|
|
#define PM8921_VREG_PIN_CTRL_NONE PM8XXX_VREG_PIN_CTRL_NONE
|
|
#define PM8921_VREG_PIN_CTRL_D1 PM8XXX_VREG_PIN_CTRL_EN0
|
|
#define PM8921_VREG_PIN_CTRL_A0 PM8XXX_VREG_PIN_CTRL_EN1
|
|
#define PM8921_VREG_PIN_CTRL_A1 PM8XXX_VREG_PIN_CTRL_EN2
|
|
#define PM8921_VREG_PIN_CTRL_A2 PM8XXX_VREG_PIN_CTRL_EN3
|
|
|
|
/* Minimum high power mode loads in uA. */
|
|
#define PM8XXX_VREG_LDO_50_HPM_MIN_LOAD 5000
|
|
#define PM8XXX_VREG_LDO_150_HPM_MIN_LOAD 10000
|
|
#define PM8XXX_VREG_LDO_300_HPM_MIN_LOAD 10000
|
|
#define PM8XXX_VREG_LDO_600_HPM_MIN_LOAD 10000
|
|
#define PM8XXX_VREG_LDO_1200_HPM_MIN_LOAD 10000
|
|
#define PM8XXX_VREG_SMPS_1500_HPM_MIN_LOAD 100000
|
|
#define PM8XXX_VREG_SMPS_2000_HPM_MIN_LOAD 100000
|
|
|
|
#define REGULATOR_TEST_BANKS_MAX 8
|
|
|
|
/**
|
|
* enum pm8xxx_vreg_pin_function - action to perform when pin control is active
|
|
* %PM8XXX_VREG_PIN_FN_ENABLE: pin control enables the regulator
|
|
* %PM8XXX_VREG_PIN_FN_MODE: pin control changes mode from LPM to HPM
|
|
*/
|
|
enum pm8xxx_vreg_pin_function {
|
|
PM8XXX_VREG_PIN_FN_ENABLE = 0,
|
|
PM8XXX_VREG_PIN_FN_MODE,
|
|
};
|
|
|
|
/**
|
|
* struct pm8xxx_regulator_platform_data - PMIC 8921 regulator platform data
|
|
* @init_data: regulator constraints
|
|
* @id: regulator id. Any value unique among pm8xxx_regulator
|
|
* devices is acceptable.
|
|
* @pull_down_enable: 0 = no pulldown, 1 = pulldown when regulator disabled
|
|
* @pin_ctrl: pin control inputs to use for the regulator; should be
|
|
* a combination of PM8XXX_VREG_PIN_CTRL_* values
|
|
* @pin_fn: action to perform when pin control pin is active
|
|
* @system_uA: current drawn from regulator not accounted for by any
|
|
* regulator framework consumer
|
|
* @enable_time: time in us taken to enable a regulator to the maximum
|
|
* allowed voltage for the system. This is dependent upon
|
|
* the load and capacitance for a regulator on the board.
|
|
* @ocp_enable: enable over current protection logic (available for
|
|
* LVS and MVS type switches)
|
|
* @ocp_enable_time: time in us to delay between enabling the switch and then
|
|
* enabling OCP for it. This delay is needed to avoid
|
|
* false triggering due to inrush current.
|
|
*/
|
|
struct pm8xxx_regulator_platform_data {
|
|
struct regulator_init_data init_data;
|
|
int id;
|
|
unsigned pull_down_enable;
|
|
unsigned pin_ctrl;
|
|
enum pm8xxx_vreg_pin_function pin_fn;
|
|
int system_uA;
|
|
int enable_time;
|
|
unsigned ocp_enable;
|
|
int ocp_enable_time;
|
|
};
|
|
|
|
#endif
|