linux-imx

/*

 * OF helpers for regulator framework

 *

 * Copyright (C) 2011 Texas Instruments, Inc.

 * Rajendra Nayak <rnayak@ti.com>

 *

 * This program is free software; you can redistribute it and/or modify

 * it under the terms of the GNU General Public License as published by

 * the Free Software Foundation; either version 2 of the License, or

 * (at your option) any later version.

 */

​

#include <linux/module.h>

#include <linux/slab.h>

#include <linux/of.h>

#include <linux/regulator/machine.h>

#include <linux/regulator/driver.h>

#include <linux/regulator/of_regulator.h>

​

#include "internal.h"

​

static const char *const regulator_states[PM_SUSPEND_MAX + 1] = {

    [PM_SUSPEND_STANDBY]    = "regulator-state-standby",

    [PM_SUSPEND_MEM]    = "regulator-state-mem",

    [PM_SUSPEND_MAX]    = "regulator-state-disk",

};

​

static void of_get_regulation_constraints(struct device_node *np,

                    struct regulator_init_data **init_data,

                    const struct regulator_desc *desc)

{

    struct regulation_constraints *constraints = &(*init_data)->constraints;

    struct regulator_state *suspend_state;

    struct device_node *suspend_np;

    unsigned int mode;

    int ret, i, len;

    u32 pval;

​

    constraints->name = of_get_property(np, "regulator-name", NULL);

​

    if (!of_property_read_u32(np, "regulator-min-microvolt", &pval))

        constraints->min_uV = pval;

​

    if (!of_property_read_u32(np, "regulator-max-microvolt", &pval))

        constraints->max_uV = pval;

​

    /* Voltage change possible? */

    if (constraints->min_uV != constraints->max_uV)

        constraints->valid_ops_mask |= REGULATOR_CHANGE_VOLTAGE;

​

    /* Do we have a voltage range, if so try to apply it? */

    if (constraints->min_uV && constraints->max_uV)

        constraints->apply_uV = true;

​

    if (!of_property_read_u32(np, "regulator-microvolt-offset", &pval))

        constraints->uV_offset = pval;

    if (!of_property_read_u32(np, "regulator-min-microamp", &pval))

        constraints->min_uA = pval;

    if (!of_property_read_u32(np, "regulator-max-microamp", &pval))

        constraints->max_uA = pval;

​

    if (!of_property_read_u32(np, "regulator-input-current-limit-microamp",

                  &pval))