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Commit 8325dec1 authored by Lingutla Chandrasekhar's avatar Lingutla Chandrasekhar
Browse files

soc: qcom: Use config to disable ipi optimization 



Enable watchdog ipi optimization by default, which makes
watchdog to not send ipi to cores in low power mode at pet time.

Add config option to control the optimization.

Change-Id: Id6a166a16ad6828cd63ec376ae263c5263494628
Signed-off-by: default avatarLingutla Chandrasekhar <clingutla@codeaurora.org>
parent d0edcda0

drivers/soc/qcom/Kconfig

+11 −0
Original line number Diff line number Diff line
@@ -250,6 +250,17 @@ config QCOM_WATCHDOG_V2 
	  deadlocks. It does not run during the bootup process, so it will

	  not catch any early lockups.



config QCOM_WDOG_IPI_ENABLE

	bool "Qcom WDT pet optimization"

	depends on QCOM_WATCHDOG_V2

	default n

	help

	  When this option is enabled, watchdog sends IPI to cores in low power

	  mode also. For power optimizations, by default watchdog don't ping

	  cores in low power mode at pettime.



	  To track CPUs health on LPM, or on debug builds enable it.



config QPNP_PBS

	tristate "PBS trigger support for QPNP PMIC"

	depends on SPMI

drivers/soc/qcom/watchdog_v2.c

+17 −7
Original line number Diff line number Diff line 
/* Copyright (c) 2012-2017, The Linux Foundation. All rights reserved.

/* Copyright (c) 2012-2018, 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
@@ -112,12 +112,22 @@ static long WDT_HZ = 32765; 
module_param(WDT_HZ, long, 0);



/*

 * Watchdog ipi optimization:

 * Does not ping cores in low power mode at pet time to save power.

 * This feature is enabled by default.

 *

 * On the kernel command line specify

 * watchdog_v2.ipi_opt_en=1 to enable the watchdog ipi ping

 * optimization. By default it is turned off

 * watchdog_v2.ipi_en=1 to disable this optimization.

 * Or, can be turned off, by enabling CONFIG_QCOM_WDOG_IPI_ENABLE.

 */

static int ipi_opt_en;

module_param(ipi_opt_en, int, 0);

#ifdef CONFIG_QCOM_WDOG_IPI_ENABLE

#define IPI_CORES_IN_LPM 1

#else

#define IPI_CORES_IN_LPM 0

#endif



static int ipi_en = IPI_CORES_IN_LPM;

module_param(ipi_en, int, 0444);



static void dump_cpu_alive_mask(struct msm_watchdog_data *wdog_dd)

{
@@ -463,7 +473,7 @@ static int msm_watchdog_remove(struct platform_device *pdev) 
	struct msm_watchdog_data *wdog_dd =

			(struct msm_watchdog_data *)platform_get_drvdata(pdev);



	if (ipi_opt_en)

	if (!ipi_en)

		cpu_pm_unregister_notifier(&wdog_cpu_pm_nb);



	mutex_lock(&wdog_dd->disable_lock);
@@ -709,7 +719,7 @@ static void init_watchdog_data(struct msm_watchdog_data *wdog_dd) 


	if (wdog_dd->irq_ppi)

		enable_percpu_irq(wdog_dd->bark_irq, 0);

	if (ipi_opt_en)

	if (!ipi_en)

		cpu_pm_register_notifier(&wdog_cpu_pm_nb);

	dev_info(wdog_dd->dev, "MSM Watchdog Initialized\n");

}