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2023-12-08 01573e231f18eb2d99162747186f59511f56b64d

 kernel/drivers/power/reset/gpio-poweroff.c
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@@ -1,3 +1,4 @@
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+// SPDX-License-Identifier: GPL-2.0-only
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 /*
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  * Toggles a GPIO pin to power down a device
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  *
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@@ -5,11 +6,6 @@
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  * Andrew Lunn <andrew@lunn.ch>
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  *
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  * Copyright (C) 2012 Jamie Lentin
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- *
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- * This program is free software; you can redistribute it and/or modify
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- * it under the terms of the GNU General Public License version 2 as
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- * published by the Free Software Foundation.
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- *
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  */
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 #include <linux/kernel.h>
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 #include <linux/init.h>
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@@ -26,6 +22,8 @@
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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 +31,11 @@
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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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+
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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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@@ -52,15 +51,13 @@
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 	bool input = false;
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 	enum gpiod_flags flags;
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-#ifndef CONFIG_ARCH_ROCKCHIP
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 	/* If a pm_power_off function has already been added, leave it alone */
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 	if (pm_power_off != NULL) {
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 		dev_err(&pdev->dev,
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-			"%s: pm_power_off function already registered",
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+			"%s: pm_power_off function already registered\n",
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 		       __func__);
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 		return -EBUSY;
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 	}
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-#endif
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 	input = device_property_read_bool(&pdev->dev, "input");
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 	if (input)
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@@ -68,6 +65,9 @@
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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);