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regulator: Fairchild fan53555 support

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This driver supports Fairchild FAN53555 Digitally Programmable
TinyBuck Regulator. The FAN53555 is a step-down switching voltage
regulator that delivers a digitally programmable output from an
input voltage supply of 2.5V to 5.5V. The output voltage is
programmed through an I2C interface.

Signed-off-by: Yunfan Zhang <yfzhang@marvell.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
This commit is contained in:
Yunfan Zhang
2012-09-08 03:52:18 -07:00
committed by Mark Brown
parent 029dd3cefa
commit 49d8c59927
4 changed files with 397 additions and 0 deletions
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60
include/linux/regulator/fan53555.h Normal file
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/*
* fan53555.h - Fairchild Regulator FAN53555 Driver
*
* Copyright (C) 2012 Marvell Technology Ltd.
* Yunfan Zhang <yfzhang@marvell.com>
*
* This package is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*
*/
#ifndef __FAN53555_H__
/* VSEL ID */
enum {
FAN53555_VSEL_ID_0 = 0,
FAN53555_VSEL_ID_1,
};
/* Transition slew rate limiting from a low to high voltage.
* -----------------------
* Bin |Slew Rate(mV/uS)
* ------|----------------
* 000 | 64.00
* ------|----------------
* 001 | 32.00
* ------|----------------
* 010 | 16.00
* ------|----------------
* 011 | 8.00
* ------|----------------
* 100 | 4.00
* ------|----------------
* 101 | 2.00
* ------|----------------
* 110 | 1.00
* ------|----------------
* 111 | 0.50
* -----------------------
*/
enum {
FAN53555_SLEW_RATE_64MV = 0,
FAN53555_SLEW_RATE_32MV,
FAN53555_SLEW_RATE_16MV,
FAN53555_SLEW_RATE_8MV,
FAN53555_SLEW_RATE_4MV,
FAN53555_SLEW_RATE_2MV,
FAN53555_SLEW_RATE_1MV,
FAN53555_SLEW_RATE_0_5MV,
};
struct fan53555_platform_data {
struct regulator_init_data *regulator;
unsigned int slew_rate;
/* Sleep VSEL ID */
unsigned int sleep_vsel_id;
};
#endif /* __FAN53555_H__ */