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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>
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parent
a53a68cee8
commit
76ee875c2f
2 changed files with 10 additions and 2 deletions
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@ -27,6 +27,8 @@ Optional properties:
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it to an output when the power-off handler is called. If this optional
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property is not specified, the GPIO is initialized as an output in its
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inactive state.
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- active-delay-ms: Delay (default 100) to wait after driving gpio active
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- inactive-delay-ms: Delay (default 100) to wait after driving gpio inactive
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- timeout-ms: Time to wait before asserting a WARN_ON(1). If nothing is
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specified, 3000 ms is used.
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@ -26,6 +26,8 @@
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*/
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static struct gpio_desc *reset_gpio;
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static u32 timeout = DEFAULT_TIMEOUT_MS;
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static u32 active_delay = 100;
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static u32 inactive_delay = 100;
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static void gpio_poweroff_do_poweroff(void)
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{
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@ -33,10 +35,11 @@ static void gpio_poweroff_do_poweroff(void)
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/* drive it active, also inactive->active edge */
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gpiod_direction_output(reset_gpio, 1);
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mdelay(100);
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mdelay(active_delay);
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/* drive inactive, also active->inactive edge */
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gpiod_set_value_cansleep(reset_gpio, 0);
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mdelay(100);
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mdelay(inactive_delay);
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/* drive it active, also inactive->active edge */
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gpiod_set_value_cansleep(reset_gpio, 1);
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@ -66,6 +69,9 @@ static int gpio_poweroff_probe(struct platform_device *pdev)
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else
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flags = GPIOD_OUT_LOW;
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device_property_read_u32(&pdev->dev, "active-delay-ms", &active_delay);
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device_property_read_u32(&pdev->dev, "inactive-delay-ms",
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&inactive_delay);
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device_property_read_u32(&pdev->dev, "timeout-ms", &timeout);
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reset_gpio = devm_gpiod_get(&pdev->dev, NULL, flags);
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