lkml.org 
[lkml]   [2010]   [Jan]   [13]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
    Patch in this message
    /
    Date
    From
    SubjectRe: [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 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;
    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
    + * @startup_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 startup_delay;
    unsigned enable_high:1;
    unsigned enabled_at_boot:1;
    struct regulator_init_data *init_data;
    --
    1.6.0.4

    \
     
     \ /
      Last update: 2010-01-13 14:15    [W:0.041 / U:0.036 seconds]
    ©2003-2016 Jasper Spaans. hosted at Digital OceanAdvertise on this site