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authorHeiko Stuebner <heiko.stuebner@bq.com>2018-11-11 22:45:38 +0100
committerSebastian Reichel <sre@kernel.org>2018-12-05 22:38:29 +0100
commit76ee875c2f48c57cbafa35d9c3b34e7202a45a83 (patch)
tree06fef854ed5e05a8122f07b01491bdf1b75d0d5d /drivers/power
parenta53a68cee88a4d892bdfcc793a661ced81cd1f56 (diff)
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power: reset: gpio-poweroff: add ability to specific active and inactive delays
Similar to gpio-reset allow to specify active and inactive delays while keeping the 100ms defaults that were used previously all the time. The dt-properties are named the same as in gpio-reset but get an "-ms" suffix as properties should contain such a suffix specifying its unit. Signed-off-by: Heiko Stuebner <heiko.stuebner@bq.com> Reviewed-by: Rob Herring <robh@kernel.org> Reviewed-by: Moritz Fischer <mdf@kernel.org> Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.com>
Diffstat (limited to 'drivers/power')
-rw-r--r--drivers/power/reset/gpio-poweroff.c10
1 files changed, 8 insertions, 2 deletions
diff --git a/drivers/power/reset/gpio-poweroff.c b/drivers/power/reset/gpio-poweroff.c
index 38206c39b3bf..52525b6c18db 100644
--- a/drivers/power/reset/gpio-poweroff.c
+++ b/drivers/power/reset/gpio-poweroff.c
@@ -26,6 +26,8 @@
*/
static struct gpio_desc *reset_gpio;
static u32 timeout = DEFAULT_TIMEOUT_MS;
+static u32 active_delay = 100;
+static u32 inactive_delay = 100;
static void gpio_poweroff_do_poweroff(void)
{
@@ -33,10 +35,11 @@ static void gpio_poweroff_do_poweroff(void)
/* drive it active, also inactive->active edge */
gpiod_direction_output(reset_gpio, 1);
- mdelay(100);
+ mdelay(active_delay);
+
/* drive inactive, also active->inactive edge */
gpiod_set_value_cansleep(reset_gpio, 0);
- mdelay(100);
+ mdelay(inactive_delay);
/* drive it active, also inactive->active edge */
gpiod_set_value_cansleep(reset_gpio, 1);
@@ -66,6 +69,9 @@ static int gpio_poweroff_probe(struct platform_device *pdev)
else
flags = GPIOD_OUT_LOW;
+ device_property_read_u32(&pdev->dev, "active-delay-ms", &active_delay);
+ device_property_read_u32(&pdev->dev, "inactive-delay-ms",
+ &inactive_delay);
device_property_read_u32(&pdev->dev, "timeout-ms", &timeout);
reset_gpio = devm_gpiod_get(&pdev->dev, NULL, flags);