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Commit e24dcc0d authored by Archana Sathyakumar's avatar Archana Sathyakumar
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lpm-levels: Add reset property for cluster notifications 



Add information on which cluster low power mode causing reset of that
cluster level. This data will be used to send out pm notifications.

Change-Id: I4eb4f3cacb590bbc1110770d422dfbfe67bb338a
Signed-off-by: default avatarArchana Sathyakumar <asathyak@codeaurora.org>
parent 1aa24ca3

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

+7 −4
Original line number Diff line number Diff line
@@ -87,6 +87,9 @@ Required properties: 
	is defined at the lpm-levels root node.

	- qcom,psci-mode: ID to be passed into the PSCI firmware. Required

	only if qcom,use-psci is defined at the lpm-levels root node.

	- qcom,is-reset: This boolean property will tell whether

	cluster level need power management notifications to be sent out

	or not for the drivers to prepare for cluster collapse.



[Node bindings for qcom,pm-cpu]

qcom,pm-cpu contains the low power modes that a cpu could enter. Currently it
@@ -114,17 +117,17 @@ qcom,pm-cpu-levels. 
	power collapse and the cpu relies on Broadcast timer for scheduled

	wakeups. Required only for states where the CPUs internal timer state

	is lost.

	- qcom,cpu-is-reset: This boolean property map to "power state" bit in

	PSCI state_id configuration. This property will tell whether CPU get

	reset for a particular LPM are not.



 Optional properties:

	- qcom,psci-mode-shift: Same as cluster level fields.

	- qcom,psci-mode-mask: Same as cluster level fields.

	- qcom,psci-cpu-mode: ID to be passed into PSCI firmware.

	- qcom,cpu-is-reset: Whether CPU get reset are not.

	- qcom,jtag-save-restore: A boolean specifying jtag registers save and restore

	required are not.

	- qcom,is-reset: This boolean property maps to "power state" bit in PSCI

	state_id configuration. This property will tell whether CPU get reset for

	a particular LPM or not. This property will also be used to notify the

	drivers in case of cpu reset.



[Example dts]

drivers/cpuidle/lpm-levels-of.c

+2 −2
Original line number Diff line number Diff line
@@ -444,6 +444,7 @@ static int parse_cluster_level(struct device_node *node, 
		if (ret)

			goto failed;



		level->is_reset = of_property_read_bool(node, "qcom,is-reset");

	} else if (!cluster->no_saw_devices) {

		key  = "no saw-devices";
@@ -648,8 +649,7 @@ static int parse_cpu_levels(struct device_node *node, struct lpm_cluster *c) 
		key = "qcom,use-broadcast-timer";

		l->use_bc_timer = of_property_read_bool(n, key);



		key = "qcom,cpu-is-reset";

		l->is_reset = of_property_read_bool(n, key);

		l->is_reset = of_property_read_bool(n, "qcom,is-reset");



		key = "qcom,jtag-save-restore";

		l->jtag_save_restore = of_property_read_bool(n, key);