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Commit 2fc1ac30 authored by Avaneesh Kumar Dwivedi's avatar Avaneesh Kumar Dwivedi
Browse files

soc: qcom: Disable Blackghost interrupts before MSM is shutdown 



During system reboot, SSR signal from BG delays reboot of MSM.
Disable Blackghost interrupt to avoid this.

Change-Id: I874f033dc318b8653015bc909527411cf3645b7f
Signed-off-by: default avatarAvaneesh Kumar Dwivedi <akdwived@codeaurora.org>
parent 32750801

drivers/soc/qcom/subsys-pil-bg.c

+27 −9
Original line number Diff line number Diff line 
/* Copyright (c) 2017, The Linux Foundation. All rights reserved.

/* Copyright (c) 2017-2018, The Linux Foundation. All rights reserved.

 *

 * This program is free software; you can redistribute it and/or modify

 * it under the terms of the GNU General Public License version 2 and
@@ -90,10 +90,19 @@ static irqreturn_t bg_status_change(int irq, void *dev_id); 
static void bg_app_shutdown_notify(const struct subsys_desc *subsys)

{

	struct pil_bg_data *bg_data = subsys_to_data(subsys);



	/* Disable irq if already BG is up */

	if (bg_data->is_ready) {

		disable_irq(bg_data->status_irq);

		disable_irq(bg_data->errfatal_irq);

		bg_data->is_ready = false;

	}

	/* Toggle AP2BG err fatal gpio here to inform apps err fatal event */

	if (gpio_is_valid(bg_data->gpios[2]))

	if (gpio_is_valid(bg_data->gpios[2])) {

		pr_debug("Sending Apps shutdown signal\n");

		gpio_set_value(bg_data->gpios[2], 1);

	}

}



/**

 * bg_app_reboot_notify() - Toggle AP2BG err fatal gpio.
@@ -106,9 +115,18 @@ static int bg_app_reboot_notify(struct notifier_block *nb, 
{

	struct pil_bg_data *bg_data = container_of(nb,

					struct pil_bg_data, reboot_blk);



	/* Disable irq if already BG is up */

	if (bg_data->is_ready) {

		disable_irq(bg_data->status_irq);

		disable_irq(bg_data->errfatal_irq);

		bg_data->is_ready = false;

	}

	/* Toggle AP2BG err fatal gpio here to inform apps err fatal event */

	if (gpio_is_valid(bg_data->gpios[2]))

	if (gpio_is_valid(bg_data->gpios[2])) {

		pr_debug("Sending reboot signal\n");

		gpio_set_value(bg_data->gpios[2], 1);

	}

	return NOTIFY_DONE;

}
@@ -266,7 +284,6 @@ static int bg_powerup(const struct subsys_desc *subsys) 
		return ret;

	}

	enable_irq(bg_data->status_irq);

	enable_irq(bg_data->errfatal_irq);

	ret = wait_for_err_ready(bg_data);

	if (ret) {

		dev_err(bg_data->desc.dev,
@@ -289,10 +306,12 @@ static int bg_shutdown(const struct subsys_desc *subsys, bool force_stop) 
{

	struct pil_bg_data *bg_data = subsys_to_data(subsys);



	if (bg_data->is_ready) {

		disable_irq(bg_data->status_irq);

		devm_free_irq(bg_data->desc.dev, bg_data->status_irq, bg_data);

		disable_irq(bg_data->errfatal_irq);

		bg_data->is_ready = false;

	}

	return 0;

}
@@ -581,7 +600,6 @@ static int setup_bg_gpio_irq(struct platform_device *pdev, 
		goto err;

	}

	drvdata->errfatal_irq = irq;

	enable_irq(drvdata->errfatal_irq);

	/* Configure outgoing GPIO's */

	if (gpio_request(drvdata->gpios[2], "AP2BG_ERRFATAL")) {

		dev_err(&pdev->dev,