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regulator: Add 'start-up time' to fixed voltage regulators

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Add a field to specify a delay for the start-up time of
a fixed voltage regulator.

Signed-off-by: Adrian Hunter <adrian.hunter@nokia.com>
Acked-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: Liam Girdwood <lrg@slimlogic.co.uk>
This commit is contained in:
Adrian Hunter 2010-01-12 12:25:13 +02:00 • committed by Liam Girdwood
parent 75c8ac22e4
commit eda79a3041
2 changed files with 7 additions and 0 deletions
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5
drivers/regulator/fixed.c
View file

@ -24,12 +24,14 @@
#include <linux/regulator/driver.h>
#include <linux/regulator/fixed.h>
#include <linux/gpio.h>
#include <linux/delay.h>
struct fixed_voltage_data {
struct regulator_desc desc;
struct regulator_dev *dev;
int microvolts;
int gpio;
unsigned startup_delay;
unsigned enable_high:1;
unsigned is_enabled:1;
};
@ -48,6 +50,8 @@ static int fixed_voltage_enable(struct regulator_dev *dev)
if (gpio_is_valid(data->gpio)) {
gpio_set_value_cansleep(data->gpio, data->enable_high);
data->is_enabled = 1;
if (data->startup_delay)
udelay(data->startup_delay);
}
return 0;
@ -117,6 +121,7 @@ static int regulator_fixed_voltage_probe(struct platform_device *pdev)
drvdata->microvolts = config->microvolts;
drvdata->gpio = config->gpio;
drvdata->startup_delay = config->startup_delay;
if (gpio_is_valid(config->gpio)) {
drvdata->enable_high = config->enable_high;