diff options
| author | Adrian Hunter <adrian.hunter@nokia.com> | 2010-01-12 12:25:13 +0200 |
|---|---|---|
| committer | Liam Girdwood <lrg@slimlogic.co.uk> | 2010-03-03 14:49:23 +0000 |
| commit | eda79a3041a2cada0d4ee9491c99c3874b322356 (patch) | |
| tree | 34f10eeca2ce681fc5701ce06380b4902f0303f0 /drivers/regulator/fixed.c | |
| parent | 75c8ac22e4b8ebea8169a090e64d034a96758644 (diff) | |
| download | lwn-eda79a3041a2cada0d4ee9491c99c3874b322356.tar.gz lwn-eda79a3041a2cada0d4ee9491c99c3874b322356.zip | |
regulator: Add 'start-up time' to fixed voltage regulators
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>
Diffstat (limited to 'drivers/regulator/fixed.c')
| -rw-r--r-- | drivers/regulator/fixed.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/drivers/regulator/fixed.c b/drivers/regulator/fixed.c index f9f516a3028a..ee3e7eb97b1c 100644 --- a/drivers/regulator/fixed.c +++ b/drivers/regulator/fixed.c @@ -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; |