linux-imx

/*

 * Regulator driver for Rockchip RK805/RK808/RK818

 *

 * Copyright (c) 2014, Fuzhou Rockchip Electronics Co., Ltd

 *

 * Author: Chris Zhong <zyw@rock-chips.com>

 * Author: Zhang Qing <zhangqing@rock-chips.com>

 *

 * Copyright (C) 2016 PHYTEC Messtechnik GmbH

 *

 * Author: Wadim Egorov <w.egorov@phytec.de>

 *

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

 * under the terms and conditions of the GNU General Public License,

 * version 2, as published by the Free Software Foundation.

 *

 * This program is distributed in the hope 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.

 */

​

#include <linux/delay.h>

#include <linux/gpio.h>

#include <linux/i2c.h>

#include <linux/module.h>

#include <linux/of_device.h>

#include <linux/of_gpio.h>

#include <linux/mfd/rk808.h>

#include <linux/regulator/driver.h>

#include <linux/regulator/of_regulator.h>

#include <linux/gpio/consumer.h>

​

/* Field Definitions */

#define RK808_BUCK_VSEL_MASK    0x3f

#define RK808_BUCK4_VSEL_MASK   0xf

#define RK808_LDO_VSEL_MASK 0x1f

​

#define RK818_BUCK_VSEL_MASK        0x3f

#define RK818_BUCK4_VSEL_MASK       0x1f

#define RK818_LDO_VSEL_MASK     0x1f

#define RK818_LDO3_ON_VSEL_MASK     0xf

#define RK818_BOOST_ON_VSEL_MASK    0xe0

​

/* Ramp rate definitions for buck1 / buck2 only */

#define RK808_RAMP_RATE_OFFSET      3

#define RK808_RAMP_RATE_MASK        (3 << RK808_RAMP_RATE_OFFSET)

#define RK808_RAMP_RATE_2MV_PER_US  (0 << RK808_RAMP_RATE_OFFSET)

#define RK808_RAMP_RATE_4MV_PER_US  (1 << RK808_RAMP_RATE_OFFSET)

#define RK808_RAMP_RATE_6MV_PER_US  (2 << RK808_RAMP_RATE_OFFSET)

#define RK808_RAMP_RATE_10MV_PER_US (3 << RK808_RAMP_RATE_OFFSET)

​

#define RK808_DVS2_POL      BIT(2)

#define RK808_DVS1_POL      BIT(1)

​

/* Offset from XXX_ON_VSEL to XXX_SLP_VSEL */

#define RK808_SLP_REG_OFFSET 1

​

/* Offset from XXX_ON_VSEL to XXX_DVS_VSEL */

#define RK808_DVS_REG_OFFSET 2

​

/* Offset from XXX_EN_REG to SLEEP_SET_OFF_XXX */

#define RK808_SLP_SET_OFF_REG_OFFSET 2

​

/* max steps for increase voltage of Buck1/2, equal 100mv*/

#define MAX_STEPS_ONE_TIME 8

​

#define RK805_DESC(_id, _match, _supply, _min, _max, _step, _vreg,      \

    _vmask, _ereg, _emask, _etime)                                  \

    [_id] = {                                                       \

        .name           = (_match),                             \

        .supply_name    = (_supply),                            \

        .of_match       = of_match_ptr(_match),                 \

        .regulators_node = of_match_ptr("regulators"),          \

        .type           = REGULATOR_VOLTAGE,                    \

        .id             = (_id),                                \

        .n_voltages     = (((_max) - (_min)) / (_step) + 1),    \

        .owner          = THIS_MODULE,                          \

        .min_uV         = (_min) * 1000,                        \

        .uV_step        = (_step) * 1000,                       \

        .vsel_reg       = (_vreg),                              \

        .vsel_mask      = (_vmask),                             \

        .enable_reg     = (_ereg),                              \

        .enable_mask    = (_emask),                             \

        .enable_time    = (_etime),                             \

        .ops            = &rk805_reg_ops,                       \

    }

​

#define RK8XX_DESC(_id, _match, _supply, _min, _max, _step, _vreg,  \

    _vmask, _ereg, _emask, _etime)                  \

    [_id] = {                           \

        .name       = (_match),             \