linux-imx

/*

* da9052-regulator.c: Regulator driver for DA9052

*

* Copyright(c) 2011 Dialog Semiconductor Ltd.

*

* Author: David Dajun Chen <dchen@diasemi.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/moduleparam.h>

#include <linux/init.h>

#include <linux/err.h>

#include <linux/platform_device.h>

#include <linux/regulator/driver.h>

#include <linux/regulator/machine.h>

#ifdef CONFIG_OF

#include <linux/of.h>

#include <linux/regulator/of_regulator.h>

#endif

​

#include <linux/mfd/da9052/da9052.h>

#include <linux/mfd/da9052/reg.h>

#include <linux/mfd/da9052/pdata.h>

​

/* Buck step size */

#define DA9052_BUCK_PERI_3uV_STEP       100000

#define DA9052_BUCK_PERI_REG_MAP_UPTO_3uV   24

#define DA9052_CONST_3uV            3000000

​

#define DA9052_MIN_UA       0

#define DA9052_MAX_UA       3

#define DA9052_CURRENT_RANGE    4

​

/* Bit masks */

#define DA9052_BUCK_ILIM_MASK_EVEN  0x0c

#define DA9052_BUCK_ILIM_MASK_ODD   0xc0

​

/* DA9052 REGULATOR IDs */

#define DA9052_ID_BUCK1     0

#define DA9052_ID_BUCK2     1

#define DA9052_ID_BUCK3     2

#define DA9052_ID_BUCK4     3

#define DA9052_ID_LDO1      4

#define DA9052_ID_LDO2      5

#define DA9052_ID_LDO3      6

#define DA9052_ID_LDO4      7

#define DA9052_ID_LDO5      8

#define DA9052_ID_LDO6      9

#define DA9052_ID_LDO7      10

#define DA9052_ID_LDO8      11

#define DA9052_ID_LDO9      12

#define DA9052_ID_LDO10     13

​

static const u32 da9052_current_limits[3][4] = {

    {700000, 800000, 1000000, 1200000}, /* DA9052-BC BUCKs */

    {1600000, 2000000, 2400000, 3000000},   /* DA9053-AA/Bx BUCK-CORE */

    {800000, 1000000, 1200000, 1500000},    /* DA9053-AA/Bx BUCK-PRO,

                         * BUCK-MEM and BUCK-PERI

                        */

};

​

struct da9052_regulator_info {

    struct regulator_desc reg_desc;

    int step_uV;

    int min_uV;

    int max_uV;

    unsigned char activate_bit;

};

​

struct da9052_regulator {

    struct da9052 *da9052;

    struct da9052_regulator_info *info;

    struct regulator_dev *rdev;

};

​

static int verify_range(struct da9052_regulator_info *info,

             int min_uV, int max_uV)

{

    if (min_uV > info->max_uV || max_uV < info->min_uV)

        return -EINVAL;

​

    return 0;

}

​

static int da9052_dcdc_get_current_limit(struct regulator_dev *rdev)

{