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Commit 73810927 authored by Mahesh Sivasubramanian's avatar Mahesh Sivasubramanian Committed by Srinivas Rao L
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drivers: cpuidle: lpm-levels: Add support per cluster prediction 



Add feature to enable/disable CPU prediction on a cluster level. This
allows more finer tuning based on power/perf requirements.

Change-Id: I1ce26c04fd3a25ee1f724da5814074308484baca
Signed-off-by: default avatarMahesh Sivasubramanian <msivasub@codeaurora.org>
parent 945fd6c8

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

+2 −0
Original line number Original line Diff line number Diff line
@@ -77,6 +77,8 @@ that share the parameters.It contains the following properties. 
	- qcom,pm-cpu-levels: The different low power modes that a CPU could

	- qcom,pm-cpu-levels: The different low power modes that a CPU could

	enter. The following section explains the required properties of this

	enter. The following section explains the required properties of this

	node.

	node.

	-qcom,use-prediction: This optional property is used to indicate the

	the LPM governor is to apply sleep prediction to this cluster.





[Node bindings for qcom,pm-cpu-levels]

[Node bindings for qcom,pm-cpu-levels]

 Required properties:

 Required properties:

drivers/cpuidle/lpm-levels-of.c

+3 −0
Original line number Original line Diff line number Diff line
@@ -713,6 +713,9 @@ static int parse_cpu_levels(struct device_node *node, struct lpm_cluster *c) 
	if (ret)

	if (ret)

		goto failed_parse_params;

		goto failed_parse_params;





	key = "qcom,use-prediction";

	cpu->lpm_prediction = of_property_read_bool(node, key);



	key = "parse_cpu";

	key = "parse_cpu";

	ret = parse_cpu(node, cpu);

	ret = parse_cpu(node, cpu);

	if (ret)

	if (ret)

drivers/cpuidle/lpm-levels.c

+2 −2
Original line number Original line Diff line number Diff line
@@ -439,7 +439,7 @@ static uint64_t lpm_cpuidle_predict(struct cpuidle_device *dev, 
	uint32_t *min_residency = get_per_cpu_min_residency(dev->cpu);

	uint32_t *min_residency = get_per_cpu_min_residency(dev->cpu);

	uint32_t *max_residency = get_per_cpu_max_residency(dev->cpu);

	uint32_t *max_residency = get_per_cpu_max_residency(dev->cpu);





	if (!lpm_prediction)

	if (!lpm_prediction || !cpu->lpm_prediction)

		return 0;

		return 0;





	/*

	/*
@@ -625,7 +625,7 @@ static int cpu_power_select(struct cpuidle_device *dev, 
		struct power_params *pwr_params = &level->pwr;

		struct power_params *pwr_params = &level->pwr;

		bool allow;

		bool allow;





		allow = lpm_cpu_mode_allow(dev->cpu, i, true);

		allow = i ? lpm_cpu_mode_allow(dev->cpu, i, true) : true;





		if (!allow)

		if (!allow)

			continue;

			continue;

drivers/cpuidle/lpm-levels.h

+1 −0
Original line number Original line Diff line number Diff line
@@ -44,6 +44,7 @@ struct lpm_cpu { 
	int nlevels;

	int nlevels;

	unsigned int psci_mode_shift;

	unsigned int psci_mode_shift;

	unsigned int psci_mode_mask;

	unsigned int psci_mode_mask;

	bool lpm_prediction;

	struct cpuidle_driver *drv;

	struct cpuidle_driver *drv;

	struct lpm_cluster *parent;

	struct lpm_cluster *parent;

};

};