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regulator: Add GPIO enable control to fixed voltage regulator driver

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Now fixed regulators that have their enable pin connected to a GPIO line
can use the fixed regulator driver for regulator enable/disable control.
The GPIO number and polarity information is passed through platform data.
GPIO enable control is achieved using gpiolib.

Signed-off-by: Roger Quadros <ext-roger.quadros@nokia.com>
Reviewed-by: Philipp Zabel <philipp.zabel@gmail.com>
Reviewed-by: Felipe Balbi <felipe.balbi@nokia.com>
Acked-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: Liam Girdwood <lrg@slimlogic.co.uk>
This commit is contained in:
Roger Quadros
2009-08-06 19:37:29 +03:00
committed by Liam Girdwood
parent a6576cff18
commit 86d9884b6a
2 changed files with 110 additions and 2 deletions
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24
include/linux/regulator/fixed.h
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@@ -5,6 +5,9 @@
*
* Author: Mark Brown <broonie@opensource.wolfsonmicro.com>
*
* Copyright (c) 2009 Nokia Corporation
* Roger Quadros <ext-roger.quadros@nokia.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
@@ -16,9 +19,30 @@
struct regulator_init_data;
/**
* struct fixed_voltage_config - fixed_voltage_config structure
* @supply_name: Name of the regulator supply
* @microvolts: Output voltage of regulator
* @gpio: GPIO to use for enable control
* set to -EINVAL if not used
* @enable_high: Polarity of enable GPIO
* 1 = Active high, 0 = Active low
* @enabled_at_boot: Whether regulator has been enabled at
* boot or not. 1 = Yes, 0 = No
* This is used to keep the regulator at
* the default state
* @init_data: regulator_init_data
*
* This structure contains fixed voltage regulator configuration
* information that must be passed by platform code to the fixed
* voltage regulator driver.
*/
struct fixed_voltage_config {
const char *supply_name;
int microvolts;
int gpio;
unsigned enable_high:1;
unsigned enabled_at_boot:1;
struct regulator_init_data *init_data;
};