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Commit 5c502df8 authored by Srinivas Rao L's avatar Srinivas Rao L
Browse files

lpm-levels: Add support for APC off with L2RAM ON mode 



To support APCS_PMIC_OFF_L2RAM_ON mode, add support for
device tree entry to specify if L2 cache need not be flushed.

Change-Id: Id67c97359f73ea364d10f81b1d2623f2dcfe820a
Signed-off-by: default avatarSrinivas Rao L <lsrao@codeaurora.org>
parent 8c88a114

Documentation/devicetree/bindings/arm/msm/lpm-levels.txt

+2 −0
Original line number Diff line number Diff line
@@ -96,6 +96,8 @@ Optional properties: 
	or not for the drivers to prepare for cluster collapse.

	- qcom,hyp-psci: This property is used to determine if the cpu

        enters the low power mode within hypervisor.

	- qcom,no-cache-flush: This boolean property will specify that cache

	will not be flushed and will be in retention for this mode.

	- qcom,reset-level: This property is used to determine in this

	low power mode only control logic power collapse happens or memory

	logic power collapse aswell happens or retention state.

drivers/cpuidle/lpm-levels-of.c

+4 −1
Original line number Diff line number Diff line
@@ -358,7 +358,8 @@ static int parse_legacy_cluster_params(struct device_node *node, 
	int ret;

	struct lpm_match {

		char *devname;

		int (*set_mode)(struct low_power_ops *, int, bool);

		int (*set_mode)(struct low_power_ops *, int,

					struct lpm_cluster_level *);

	};

	struct lpm_match match_tbl[] = {

		{"l2", set_l2_mode},
@@ -595,6 +596,8 @@ static int parse_cluster_level(struct device_node *node, 
					"qcom,disable-dynamic-int-routing");

	level->last_core_only = of_property_read_bool(node,

					"qcom,last-core-only");

	level->no_cache_flush = of_property_read_bool(node,

					"qcom,no-cache-flush");



	key = "parse_power_params";

	ret = parse_power_params(node, &level->pwr);

drivers/cpuidle/lpm-levels.c

+14 −5
Original line number Diff line number Diff line
@@ -354,10 +354,12 @@ static void msm_pm_set_timer(uint32_t modified_time_us) 
	hrtimer_start(&lpm_hrtimer, modified_ktime, HRTIMER_MODE_REL_PINNED);

}



int set_l2_mode(struct low_power_ops *ops, int mode, bool notify_rpm)

int set_l2_mode(struct low_power_ops *ops, int mode,

				struct lpm_cluster_level *level)

{

	int lpm = mode;

	int rc = 0;

	bool notify_rpm = level->notify_rpm;

	struct low_power_ops *cpu_ops = per_cpu(cpu_cluster,

			smp_processor_id())->lpm_dev;
@@ -369,6 +371,9 @@ int set_l2_mode(struct low_power_ops *ops, int mode, bool notify_rpm) 
	case MSM_SPM_MODE_STANDALONE_POWER_COLLAPSE:

	case MSM_SPM_MODE_POWER_COLLAPSE:

	case MSM_SPM_MODE_FASTPC:

		if (level->no_cache_flush)

			cpu_ops->tz_flag = MSM_SCM_L2_GDHS;

		else

			cpu_ops->tz_flag = MSM_SCM_L2_OFF;

		coresight_cti_ctx_save();

		break;
@@ -400,8 +405,10 @@ int set_l2_mode(struct low_power_ops *ops, int mode, bool notify_rpm) 
	return rc;

}



int set_l3_mode(struct low_power_ops *ops, int mode, bool notify_rpm)

int set_l3_mode(struct low_power_ops *ops, int mode,

				struct lpm_cluster_level *level)

{

	bool notify_rpm = level->notify_rpm;

	struct low_power_ops *cpu_ops = per_cpu(cpu_cluster,

			smp_processor_id())->lpm_dev;
@@ -418,8 +425,10 @@ int set_l3_mode(struct low_power_ops *ops, int mode, bool notify_rpm) 
}





int set_system_mode(struct low_power_ops *ops, int mode, bool notify_rpm)

int set_system_mode(struct low_power_ops *ops, int mode,

				struct lpm_cluster_level *level)

{

	bool notify_rpm = level->notify_rpm;

	return msm_spm_config_low_power_mode(ops->spm, mode, notify_rpm);

}
@@ -434,7 +443,7 @@ static int set_device_mode(struct lpm_cluster *cluster, int ndevice, 
	ops = &cluster->lpm_dev[ndevice];

	if (ops && ops->set_mode)

		return ops->set_mode(ops, level->mode[ndevice],

				level->notify_rpm);

				level);

	else

		return -EINVAL;

}

drivers/cpuidle/lpm-levels.h

+10 −5
Original line number Diff line number Diff line 
/* Copyright (c) 2014-2016, The Linux Foundation. All rights reserved.

/* Copyright (c) 2014-2017, 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
@@ -76,11 +76,13 @@ struct lpm_cluster_level { 
	unsigned int psci_id;

	bool is_reset;

	int reset_level;

	bool no_cache_flush;

};



struct low_power_ops {

	struct msm_spm_device *spm;

	int (*set_mode)(struct low_power_ops *ops, int mode, bool notify_rpm);

	int (*set_mode)(struct low_power_ops *ops, int mode,

				struct lpm_cluster_level *level);

	enum msm_pm_l2_scm_flag tz_flag;

};
@@ -110,9 +112,12 @@ struct lpm_cluster { 
	bool no_saw_devices;

};



int set_l2_mode(struct low_power_ops *ops, int mode, bool notify_rpm);

int set_system_mode(struct low_power_ops *ops, int mode, bool notify_rpm);

int set_l3_mode(struct low_power_ops *ops, int mode, bool notify_rpm);

int set_l2_mode(struct low_power_ops *ops, int mode,

				struct lpm_cluster_level *level);

int set_system_mode(struct low_power_ops *ops, int mode,

				struct lpm_cluster_level *level);

int set_l3_mode(struct low_power_ops *ops, int mode,

				struct lpm_cluster_level *level);

void lpm_suspend_wake_time(uint64_t wakeup_time);



struct lpm_cluster *lpm_of_parse_cluster(struct platform_device *pdev);