Messages in this thread Patch in this message | | | Date | Wed, 13 Jan 2010 13:58:26 +0200 | From | Adrian Hunter <> | Subject | [PATCH] regulator: Add 'start-up time' to fixed voltage regulators |
| |
From bd97e65b280be528239e3932da8be512ce7785ed Mon Sep 17 00:00:00 2001 From: Adrian Hunter <adrian.hunter@nokia.com> Date: Tue, 12 Jan 2010 12:25:13 +0200 Subject: [PATCH] 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> --- drivers/regulator/fixed.c | 5 +++++ include/linux/regulator/fixed.h | 2 ++ 2 files changed, 7 insertions(+), 0 deletions(-)
diff --git a/drivers/regulator/fixed.c b/drivers/regulator/fixed.c index f9f516a..40d4080 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 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->delay) + udelay(data->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->delay = config->delay; if (gpio_is_valid(config->gpio)) { drvdata->enable_high = config->enable_high; diff --git a/include/linux/regulator/fixed.h b/include/linux/regulator/fixed.h index e94a4a1..02edef1 100644 --- a/include/linux/regulator/fixed.h +++ b/include/linux/regulator/fixed.h @@ -25,6 +25,7 @@ struct regulator_init_data; * @microvolts: Output voltage of regulator * @gpio: GPIO to use for enable control * set to -EINVAL if not used + * @delay: Start-up time in microseconds * @enable_high: Polarity of enable GPIO * 1 = Active high, 0 = Active low * @enabled_at_boot: Whether regulator has been enabled at @@ -41,6 +42,7 @@ struct fixed_voltage_config { const char *supply_name; int microvolts; int gpio; + unsigned delay; unsigned enable_high:1; unsigned enabled_at_boot:1; struct regulator_init_data *init_data; -- 1.6.0.4
| |